Casio PX-870 vs Yamaha YDP-145

If you’re shopping for an upright-style digital piano under $1,500, there’s a good chance you’ve narrowed your options to two: the Casio PX‑870 and the Yamaha YDP‑145. Both offer full 88‑key, weighted hammer action with realistic piano sound, housed in a furniture-style console. But which one should you choose?

I’ve spent weeks playing each model—testing the feel, sound, daily use, and owner expectations—so this review breaks down everything important: design, keyboard action, tone and piano voices, amplification/speakers, features and functions, connectivity, pedals, touches and extras, reliability, price and value, and finally who should lean each way. No fluff—just straight-up, real-world feedback.

Casio PX-870 vs Yamaha YDP-145 Comparison Chart

If you click the links below, under the product images, you will be redirected to Amazon.com. In case you then decide to buy anything, Amazon.com will pay me a commission. This doesn’t affect the honesty of this review in any way though.

Specification	Casio PX-870	Yamaha YDP-145
	Check the best price on Amazon	Check the best price on Amazon
Keyboard	88-key Tri-Sensor Scaled Hammer Action II	88-key Graded Hammer Standard (GHS)
Key Surface	Simulated Ivory & Ebony	Matte Black Key Tops (black keys only)
Touch Sensitivity	3 levels + off	4 levels + off
Sound Engine	Multi-Dimensional Morphing AiR	AWM Stereo Sampling
Max Polyphony	256 notes	192 notes
Piano Voices	4 Grand Piano tones	2 Grand Piano tones
Total Voices	19 tones	10 tones
Speakers	4 speakers (2 × 12 cm, 2 × 4 cm)	2 speakers (12 cm x 2)
Amplifier Output	2 × 20W	2 × 8W
Pedals	3 (Damper, Sostenuto, Soft) with half-pedaling	3 (Damper with half-pedaling, Sostenuto, Soft)
Recording	2-track MIDI recording	1-track MIDI recording
Reverb Types	4 types + Hall Simulator	4 types
Acoustic Simulation	Lid, Damper Noise, String & Key-off Resonance	Basic damper resonance
Modes	Layer, Duet	Dual, Duo
Split Mode	Not available	Not available
USB to Host	Yes (MIDI)	Yes (MIDI)
Bluetooth MIDI	No	Optional via adapter
Bluetooth Audio	No	No
Line Out	No (via headphone jack)	No (via headphone jack)
Line In	No	No
Headphone Jacks	2 × 1/4″ stereo	2 × 1/4″ stereo
App Support	None	Smart Pianist App
Finish Options	Black, White	Black, White, Dark Rosewood
Dimensions (W × D × H)	55.1″ × 11.8″ × 31.5″	53.4″ × 16.6″ × 32″
Weight	75.6 lbs (34.3 kg)	83.8 lbs (38 kg)
Bench Included	Varies by retailer	Usually included
My individual reviews	Casio PX-870 review	Yamaha YDP-145 review

Design & Build

When it comes to digital pianos in the sub-$1,500 price range, design and build quality often play a bigger role than most people admit—especially when the instrument will be placed in a visible area like a living room or home studio. The Casio PX-870 and Yamaha YDP-145 both take the console-style route, offering a furniture-like appearance that mimics the silhouette of an acoustic upright piano. But dig a little deeper, and you’ll see the two manufacturers took different approaches—both in terms of aesthetics and construction philosophy.

Let’s unpack each one thoroughly so you know exactly what to expect from the look, feel, and structural integrity of each instrument.

First Impressions

At first glance, both the PX-870 and YDP-145 look like digital pianos aimed at home users who want more than just a slab keyboard on a stand. They both feature a full-sized body, key cover, built-in music stand, and three-pedal unit integrated into the chassis. From a few feet away, they give off a decent impression of a traditional upright piano.

But the moment you get up close, you start to notice the differences. Casio’s PX-870 leans toward a minimalist, modern look, while Yamaha’s YDP-145 is more traditional—almost ornamental in comparison.

Casio PX-870: Modern, Minimal, and Practical

The PX-870 feels like it was designed with today’s modern home in mind. Its aesthetic is clean, sleek, and unfussy. The lines are straight, the front is uncluttered, and the lid—when closed—blends seamlessly into the overall form. There are no protruding edges or ornate trims. Everything has a reason and place.

One smart feature Casio nailed is the sliding key cover. It tucks into the body of the piano when open, and when closed, it gives a clean, monolithic look to the front panel. It also protects the keys from dust without requiring any extra space on top of the instrument, which is useful if you’re placing the piano against a wall or in a narrow area.

Build-wise, the PX-870 uses medium-density fiberboard (MDF) wrapped in a synthetic wood-grain veneer. It doesn’t feel like high-end furniture, but it doesn’t feel cheap either. The surfaces resist fingerprints fairly well, and the veneer doesn’t look tacky or overly plastic. In black or white, it fits in with minimalist decor or contemporary interiors.

From a structural standpoint, the PX-870 is rock solid. It weighs around 75 lbs (34 kg) without the stand, and about 103 lbs (47 kg) fully assembled. The back panel is thick and reinforced, and once set up, the whole piano feels firm and grounded. There’s little to no wobble when you play, even aggressively. The pedal unit is built into a broad bottom support, adding to the sturdiness.

One clever detail that often goes overlooked: Casio hides most of the control buttons under the left side of the keyboard. There’s no screen or control panel sticking out to break the illusion of an acoustic piano. It makes the whole instrument look more elegant. Some users might find this less convenient during quick adjustments, but from a visual standpoint, it’s a win.

The music rest is functional, wide enough to hold multiple pages, and angled well. However, it’s plastic and lacks height adjustment, so tall books or tablets might need a prop. That said, it holds sheet music or a slim tablet just fine.

Overall, the PX-870 design is more than just good-looking—it’s smartly engineered for stability, simplicity, and aesthetic discretion.

Yamaha YDP-145: Classic, Familiar, and Refined

Yamaha, on the other hand, has never shied away from the traditional piano look, and the YDP-145 follows that lineage closely. The design mirrors that of the company’s long-standing Arius line: a slightly taller body, elegant side panels with beveled edges, and a soft-close folding key cover.

While the PX-870 says “modern,” the YDP-145 says “classic.” If you grew up with an upright acoustic in the living room, Yamaha’s shape and styling will feel familiar and comfortable. It has more visual mass in the cabinet, particularly around the sides and pedal area, which some users may find more “piano-like.” The finish comes in options like dark rosewood and black walnut, which add a cozy, furniture-grade look.

The YDP-145 is a bit narrower than the Casio front-to-back, but slightly wider across the front. It weighs around 83 lbs (37.5 kg), so it’s lighter than the PX-870 overall but still feels sturdy. The keybed doesn’t flex under pressure, and the structure doesn’t wobble during normal use. The pedal unit is less bulky compared to Casio’s but still integrated well.

Unlike the Casio, Yamaha places its control buttons along the left side of the front panel. They’re visible and clearly labeled, which makes navigation easier, especially for beginners. The downside is they slightly disrupt the illusion of a real piano. There’s no screen either, so you’ll rely on key combinations for advanced functions unless you’re using Yamaha’s Smart Pianist app.

The sliding key cover is more basic compared to Casio’s. It doesn’t retract inside the body, and it doesn’t close flush. It still protects the keys but isn’t quite as elegant. The music rest is wide and taller than Casio’s, which makes it slightly better for supporting heavier books or larger tablets. However, it doesn’t have any adjustment features either.

One thing Yamaha does well is finish quality. The wood grain look on the veneer is more convincing, and the slightly glossy texture gives it a more “furniture store” polish. While the Casio feels more like a musical instrument that fits into modern decor, the YDP-145 feels like a piece of the home itself.

In terms of build longevity, Yamaha has a reputation for producing digital pianos that last for years—even decades—with minimal wear if treated well. Casio holds up, but Yamaha may have a slight edge in long-term cosmetic durability. The YDP-145’s keys, finish, and pedal assembly all feel like they were built to outlast budget competition.

Ergonomics and User Experience

Both pianos place the keyboard at roughly the same height, around 29.5–30 inches, which is standard. That said, the bench that comes with each model varies. Casio’s included bench is lightweight and on the shorter side—fine for children or teens but may feel cramped for taller adults. Yamaha’s matching bench is sturdier and more aligned with the piano’s aesthetics, offering a better height match for the keyboard.

When seated at each, the PX-870 feels slightly more compact and focused. The deeper cabinet gives it more room to “breathe” around your legs, which can matter if you’re tall. The Yamaha feels more open underneath, but its slightly shallower depth makes it feel closer to the wall behind you.

Both models come in flat-pack form and require assembly. The Casio takes about 45–60 minutes to put together with a second person helping. Yamaha’s is a little easier thanks to better instructions and slightly lighter parts. Either way, you’ll want to build it in the room where it will live.

Noise and Vibration

One subtle design advantage of the PX-870 is its internal sound projection system. Because it has a top-facing speaker grid and sound port, the sound “breathes” more, creating a slightly more immersive acoustic environment. That design does make the top more susceptible to dust, though.

The Yamaha’s sound comes mostly from underneath, giving it a slightly more muted presence—good for small rooms but less lively. In both cases, structural vibration is minimal. Neither model buzzes or creaks under pressure, a testament to solid internal bracing.

Conclusion

From a design and build perspective, the Casio PX-870 is a more modern, clean, and performance-first digital piano. It’s built for players who want a realistic piano feel and tone without the distraction of visible controls or ornate styling. It fits into a contemporary home just as easily as a music studio.

The Yamaha YDP-145 is more about classic familiarity. It feels like the piano you may have grown up with—solid, respectable, understated. It’s slightly more beginner-friendly in terms of interface, and its polished design might blend better in homes with traditional décor.

If you’re buying based on aesthetics and build quality alone, your choice will come down to taste. Modern minimalism? Casio PX-870. Classic upright vibes? Yamaha YDP-145. Both are well-constructed and offer serious value for the price, but they speak to different sensibilities—and that’s not a bad thing.

Keyboard Action

When choosing a digital piano, sound matters—but the feel of the keys often matters more. It’s the part of the instrument you interact with the most. A digital piano can have world-class samples, but if the keyboard feels off, it’s going to ruin the experience. That’s why keyboard action is one of the most critical categories in this comparison between the Casio PX-870 and the Yamaha YDP-145.

Both pianos feature fully-weighted, 88-key hammer action keyboards designed to mimic the resistance and mechanics of an acoustic piano. But they go about it in different ways, and those differences become increasingly noticeable the more time you spend with them. Let’s break it down.

Casio PX-870: Tri-Sensor Scaled Hammer Action II

The PX-870 uses Casio’s Tri-Sensor Scaled Hammer Action II, one of the best key actions you’ll find in this price range. Casio has been refining this mechanism for over a decade, and it shows. The keys are weighted and graded—heavier in the bass and lighter as you move up the register. That mimics how real pianos work, where longer, thicker strings and larger hammers in the bass create more resistance.

But what sets Casio apart is the inclusion of three sensors per key. Most digital pianos at this level use two sensors, which detect the press and release of a key to calculate velocity and timing. The third sensor allows the keyboard to detect repeated key presses even if the key hasn’t fully returned to its resting position. That makes a big difference for more advanced techniques, like fast trills, staccato repetition, and expressive phrasing. You don’t have to completely release the key before it’s ready to sound again, which feels closer to a real acoustic piano.

The keytops are textured to simulate the feel of ivory and ebony. It’s not just for looks—this texture improves grip, especially during long practice sessions or in humid environments. It also prevents that plasticky, slippery feel you sometimes get on cheaper keyboards.

The key movement itself is smooth and balanced. There’s a slight bounce at the bottom of the stroke, giving it a responsive, cushioned feel without feeling mushy. The reset point is well-placed, and the travel distance is realistic—neither too shallow nor exaggerated. When playing repeated notes, arpeggios, or legato runs, the PX-870 allows for fluid transitions and precise dynamic control.

Where the PX-870 particularly shines is in its ability to capture dynamic nuance. Pianissimo passages can be played with gentle finger weight, while fortissimo sections respond with real weight and resistance. The dynamic range feels wide and natural, and it rewards controlled technique.

In short, Casio’s action feels expressive and refined. It’s not just “good enough for a beginner”—it’s actually satisfying for intermediate and even semi-pro players. You can grow with it.

Yamaha YDP-145: GHS (Graded Hammer Standard)

Yamaha’s YDP-145 comes equipped with the company’s GHS (Graded Hammer Standard) action. This is Yamaha’s entry-level graded hammer mechanism, and while it’s reliable and serviceable, it’s noticeably less sophisticated than Casio’s tri-sensor system.

The GHS keyboard is also graded—heavier on the lower notes, lighter on the higher ones—but it uses a simpler dual-sensor setup. This is fine for most beginner and intermediate use, but if you’re used to more advanced repetition and subtle phrasing, you may start to notice limitations. When you try to rapidly repeat a note without fully releasing the key, the GHS sometimes misses that input. It’s not dramatic, but it’s a trade-off that becomes apparent with faster, more nuanced pieces.

Yamaha’s keys have a matte black finish on the sharps and a smooth, slightly textured surface on the whites. It’s not as grippy or realistic as Casio’s simulated ivory/ebony, but it avoids the glossy feel of truly low-end keyboards. It’s a comfortable surface, though it might get slick if your hands sweat during longer practice sessions.

The mechanical movement of the GHS keys is on the heavier side. In fact, some users find the action a bit stiff, particularly in the bass register. That might be helpful for beginners building finger strength, but it can also feel slightly fatiguing during long sessions. The key return is quick and reliable, but the tactile feedback is less refined compared to Casio’s—less of a bounce and more of a mechanical “stop” at the bottom.

Dynamics are a bit compressed. Soft playing is possible, but you’ll have to work harder to get the full expressive range. It’s not as forgiving or responsive to delicate touch as Casio’s action, which could be limiting if you’re trying to interpret pieces that demand high dynamic contrast.

However, the GHS system does have some upsides. It’s durable, quiet, and proven. Yamaha has used this action in countless models, and it holds up well over time. There’s a mechanical simplicity to it that makes it easy to maintain. For students or beginners, it’s consistent and easy to adapt to, and for players moving on to an acoustic upright later, the resistance may feel familiar.

Side-by-Side Feel

Playing both instruments back-to-back is where the differences come into full focus. On the Casio PX-870, there’s a sense of finesse—subtlety in dynamics, responsiveness in repeated notes, and a softness in the key return that makes expressive playing more fluid. It feels more “alive” under your fingers.

The Yamaha YDP-145, in contrast, feels a bit more utilitarian. It’s reliable and functional, but it doesn’t have the same nuanced touch. For classical players or anyone focused on expressive control, this may be a sticking point. For casual players, pop musicians, or students focused on core fundamentals, it gets the job done without surprises.

That said, preferences can be subjective. Some players prefer the firmer, slightly more mechanical feel of Yamaha’s GHS because it reminds them of upright acoustic pianos—especially older ones with heavier action. Others may find Casio’s smoother movement more natural and less tiring.

Noise and Keybed Stability

One area where both pianos perform well is noise isolation. Key noise on both units is relatively quiet, with minimal mechanical clunking or spring noise. The PX-870 has a slightly softer landing, which helps with late-night practice or shared living spaces. Yamaha’s keybed is more percussive but not overly noisy.

The keybed stability on both models is also solid. No wobbling keys or lateral movement—even after prolonged use. That’s important for confidence during technical passages and for ensuring consistent action across the whole keyboard.

Repetition and Advanced Techniques

Here’s where the third sensor on the Casio makes a big difference. When playing pieces that involve fast repetition of a single note—say, Rachmaninoff, Liszt, or even pop and jazz comping patterns—the PX-870 doesn’t force you to lift the key all the way up before it’s ready to strike again. This makes playing smoother and more efficient.

With Yamaha’s GHS, you do feel the need to come back to the top more often. It’s a subtle difference at first, but if you play a lot of high-speed or repetitive passages, it can be frustrating. This also impacts legato technique and phrasing in faster classical music, where transitions need to feel seamless.

Learning Curve and Adaptability

For total beginners, both keyboards are more than sufficient. They give a good introduction to hammer action and finger control. But if you plan to progress past the beginner level and want an instrument that won’t hold you back as your technique improves, the Casio gives you more room to grow.

For teachers buying a practice instrument for a motivated student, the PX-870’s action will better support intermediate development. If your goal is to eventually play with a real grand or upright piano, the PX-870 is a more honest preparation tool.

Longevity and Maintenance

In terms of long-term durability, both Casio and Yamaha have reliable key actions that withstand years of regular use. Yamaha’s GHS mechanism may edge ahead in terms of long-term track record—it’s been used in models for over a decade with minimal complaints. Casio’s Tri-Sensor action is newer in the grand scheme but has also proven stable and consistent.

There are no major mechanical faults reported frequently for either keyboard, though it’s worth noting that excessive heat, moisture, or dust can affect any weighted-action keyboard. Regular cleaning and stable placement will help preserve both mechanisms.

Conclusion

In this head-to-head, Casio clearly takes the lead in terms of keyboard action. The Tri-Sensor Scaled Hammer Action II offers superior responsiveness, better repetition, and a more expressive playing experience. The textured keys feel more authentic, and the action rewards nuanced technique and dynamic control.

Yamaha’s GHS action is dependable and durable but more basic in execution. It’s suitable for beginners and casual players, but intermediate or advanced players will likely find it limiting over time.

If you’re serious about learning piano—or want the closest feel to an acoustic without spending thousands—the PX-870 is the better option. If you want something reliable and slightly cheaper with a more traditional key resistance, the YDP-145 will still serve you well. Just know that when it comes to expressiveness, Casio has the upper hand.

Sound & Tone Quality

When we talk about digital pianos, sound is everything. It’s the heart of the instrument. The realism of the piano tones, the subtle resonances, how the notes evolve after being played—all of these shape your experience and connection with the instrument. In this section, we’re diving deep into how the Casio PX-870 and Yamaha YDP-145 stack up in terms of tone generation, sample quality, polyphony, and overall sonic performance.

Both models aim to replicate the sound of an acoustic grand piano, but they go about it differently. Let’s unpack the differences from the ground up.

Tone Engine & Sampling

Let’s start with the core—the technology that generates the piano’s sound.

Casio PX-870 uses Casio’s Multi-Dimensional Morphing AiR Sound Source, which is a mouthful, but what it really means is that it captures a wide range of tonal nuances using high-quality stereo sampling with lossless compression. Casio claims that this technology doesn’t just record one note at one velocity, but instead captures how the tone evolves over time depending on how hard or soft you play. It’s about dynamic behavior, not just raw audio samples.

The AiR engine in the PX-870 is specifically tailored to a detailed stereo sample of a concert grand piano. It layers multiple velocity samples per key and integrates sympathetic resonance, damper resonance, key-off simulation, and lid position modeling. That’s a big deal in this price range—these are features you often find in pianos costing double.

Yamaha YDP-145, on the other hand, uses Yamaha’s AWM (Advanced Wave Memory) Stereo Sampling. It samples the sound of a Yamaha CFX concert grand piano and applies filtering and dynamic control to simulate the feel of acoustic play. The AWM engine is simpler than Casio’s AiR—it doesn’t do time-based morphing or physical modeling, but it still offers a solid and clean sample set, with a reputation for reliability and warmth.

In terms of tone engine power, Casio wins on paper—and that advantage is audible in real-world use.

Grand Piano Sound

Both pianos ship with their flagship grand piano tone as the default when powered on. This is the sound you’ll likely use 90% of the time, so let’s compare.

Casio PX-870’s “Concert Grand” tone has a rich, resonant low end, a nuanced midrange, and a sparkling treble. It feels alive. Notes bloom with harmonics, and there’s a lot of tonal variation depending on how you strike the key. Play gently and you get a rounded, velvety tone. Dig in and the sound sharpens, adding a slightly metallic shimmer, especially in the higher octaves.

The dynamics are excellent—probably the best you’ll find under $1,500. The velocity layers transition smoothly without noticeable jumps. The combination of damper resonance, string resonance, and key-off simulation makes sustained chords feel immersive, especially when played with the pedal. You can hear faint sympathetic harmonics as you’d get on a real acoustic.

Yamaha YDP-145’s CFX voice is more reserved. The tone is clean and warm, especially in the middle range. The bass is round but not deep; the highs are crisp but not biting. Overall, it leans mellow, which makes it a good choice for classical and jazz—but it lacks the same degree of brightness and depth you get from the PX-870.

Dynamics are a bit compressed. You get a decent variation between soft and loud playing, but it’s not as expressive as the PX-870. There’s also less sustain resonance and realism in note decay. Notes tend to fade faster and without the complexity of overtones you’d hear in a real instrument—or in Casio’s simulation.

In short, Casio sounds more detailed and expressive, while Yamaha keeps it safe and neutral.

Polyphony

Polyphony determines how many notes can sound at the same time. This includes sustained notes, overlapping chords, and effects like resonance or dual-voice layering.

• Casio PX-870: 256-note polyphony
• Yamaha YDP-145: 192-note polyphony

In real-world terms, both are capable of handling complex classical pieces or heavy pedal usage. But Casio’s extra headroom is welcome, especially when using layering, long sustain passages, or fast arpeggios. In extreme situations, Yamaha’s 192-note engine can start cutting off trailing notes if the pedal is held too long while playing dense clusters.

This is especially important if you use two sounds layered (say, piano and strings), or play large-scale romantic repertoire with heavy sustain. Casio has room to breathe. Yamaha’s polyphony is still decent, but not as future-proof.

Additional Voices

Both pianos offer a handful of additional sounds beyond the main grand piano. These are secondary in importance, but worth considering.

Casio PX-870 includes:

• 4 Grand Piano variations (Concert, Mellow, Bright, and Modern)
• 4 Electric Pianos (including FM-style and rhodes-style)
• Strings
• Harpsichord
• Vibraphone
• Pipe organ
• Jazz organ
• Bass layered with ride cymbal

All sounds are high-quality. The electric pianos have character, the strings are lush for layering, and the organs are usable. They’re not overwhelming in variety, but Casio chose quality over quantity.

Yamaha YDP-145 includes:

• Grand Piano (CFX)
• Mellow Piano
• Electric Piano
• Harpsichord
• Pipe Organ
• Strings

Yamaha keeps the voice list minimal. The electric piano sounds are usable but somewhat flat. The strings are smooth, good for subtle layering, and the pipe organ is passable, though not inspiring.

In this category, Casio again wins by offering more usable, expressive variations.

Reverb & Effects

Casio PX-870 offers multiple types of digital reverb (hall, room, stage, etc.), plus simulation of lid position (open/half/closed), damper noise, and key-off response. You can adjust resonance settings too, like damper and string resonance. These elements come together to make the piano sound fuller and more natural.

Yamaha YDP-145 includes basic reverb types—Room, Hall 1, Hall 2, Stage—and allows you to control the depth, but that’s about it. There’s no modeling of lid position, key-off response, or mechanical noises. It’s more static and simpler, which may be fine for beginners but feels limited to more experienced players.

Speaker Sound vs. Headphone Sound

Both instruments sound different depending on how you’re listening.

Through speakers:

• Casio’s 4-speaker setup creates a wide stereo field with more depth. The “sound projection system” aims sound in multiple directions, including upward and toward the player. This gives the PX-870 a more immersive sound that mimics the feel of playing an acoustic upright.
• Yamaha’s dual-speaker setup is clean but more directional. It sounds good in a small room but can feel boxy or narrow in larger spaces. Bass lacks punch, and the dynamic range feels somewhat compressed compared to Casio’s more open soundstage.

Through headphones:

Casio still holds an edge here. It uses “Headphone Mode” EQ processing to simulate the experience of sitting in front of a real piano. It’s subtle, but it makes long headphone sessions less fatiguing. Yamaha’s headphone output is clean and balanced but doesn’t offer the same spatial enhancement. Still, both are good for private practice.

Expressiveness & Playability

Casio offers more room for expression, thanks to better dynamics, more nuanced sampling, and more realistic sustain behavior. Whether you’re playing softly or slamming out chords, the PX-870 responds with clarity and intention.

Yamaha is more middle-of-the-road. Its CFX sampling is smooth and musical, but a little too safe at times. It doesn’t quite encourage dynamic risk-taking the same way Casio does.

For beginners, Yamaha’s consistent tone is easy to work with and forgiving. But for more advanced players looking to inject nuance, Casio offers more latitude.

Final Thoughts on Sound

To sum it up:

• If you want detailed, expressive, immersive sound, the Casio PX-870 is the clear winner. It offers deeper tonal complexity, a better engine, more control over resonances, and superior speaker projection. It brings you closer to the sensation of playing a real acoustic piano.
• If you prefer a smoother, mellow tone and a more straightforward setup, the Yamaha YDP-145 is still a good option. It doesn’t have the same emotional weight in the sound, but it’s consistent and clear—especially for classical and soft playing.

At the end of the day, both pianos will get the job done, but the PX-870 simply sounds more like a real piano, especially when played expressively. Yamaha sounds good—but Casio sounds alive.

Speakers & Amplification

One of the most underrated aspects of any digital piano is its speaker system. People often obsess over sound engines and sample quality—and rightly so—but if the piano’s speakers don’t do justice to those sounds, then the experience falls flat. In this section, we’ll explore how the Casio PX-870 and Yamaha YDP-145 compare in terms of amplification, speaker design, projection, and real-world listening experience. Whether you’re playing in a bedroom, a living room, or a small studio, how the piano fills the space matters a lot.

Both the PX-870 and YDP-145 are console-style digital pianos with built-in speaker systems designed to emulate the acoustic experience. But that’s where the similarities end. Casio clearly put a lot more effort into the speaker design of the PX-870, and it pays off. Let’s start with the specs and then work our way into performance and usability.

Casio PX-870: Four-Speaker Sound Projection System

Casio equipped the PX-870 with a four-speaker, multi-directional sound system. Here’s what that looks like on paper:

• 2 x 10W speakers (main)
• 2 x 8W speakers (additional)
• Total output: 36 watts

The speakers are placed strategically—two directed upward and outward from the top panel, and two directed downward and toward the player. This setup creates a surprisingly rich and three-dimensional sound field. Casio markets this as its Sound Projection System, and while it sounds like marketing jargon, it actually works.

What does that mean in real terms? It means the sound doesn’t feel like it’s just coming from a pair of stereo boxes beneath the keys. It feels like it’s surrounding you. There’s an acoustic “bloom” to the sound that mimics how an upright piano vibrates and fills a room—not just forward, but in all directions.

The upward-facing speakers create a sort of soundboard effect, while the downward-facing ones give tactile feedback as the sound reflects off the floor and your body. This is especially noticeable when you’re seated in front of the piano. You can feel the low frequencies in your legs and chest. That’s not something you get from most digital pianos under $2,000.

Volume-wise, the PX-870 can fill a medium-sized room without breaking a sweat. At 60–70% volume, it already feels powerful. At full volume, it gets impressively loud without distortion, though I wouldn’t recommend maxing it out for extended sessions—your neighbors might not thank you.

Tonally, the speaker system handles the full frequency range well. Bass notes are deep and punchy, mids are well-balanced, and the high-end is clear without being shrill. The built-in EQ seems optimized to enhance realism, and there’s no need to tweak it unless you’re doing something specific, like recording or performing with backing tracks.

Another subtle but impactful feature: Casio includes a lid simulator setting that affects how sound escapes from the instrument—simulating the effect of an acoustic piano lid being open or closed. It subtly alters the brightness and spatial presence of the sound, and combined with the speaker positioning, it adds realism that you can actually hear and feel.

Overall, the PX-870’s speaker system is one of the best in its class. It feels intentionally designed, not just slapped on as an afterthought.

Yamaha YDP-145: Traditional Dual-Speaker System

Now, let’s turn to the Yamaha YDP-145.

• 2 x 8W speakers (stereo)
• Total output: 16 watts

Compared to Casio’s four-speaker system, Yamaha’s setup is simple and more in line with standard entry-level console digital pianos. Two full-range speakers are located underneath the keyboard, firing downward.

This arrangement gets the job done for casual playing or beginner use, but it’s not in the same league as the PX-870. The sound is more directional and less immersive. You’ll hear it clearly in front of the piano, but you don’t get the same feeling of being “inside” the sound like you do with Casio’s multi-directional projection.

Volume-wise, the YDP-145 is perfectly adequate for smaller rooms, bedrooms, and practice spaces. At about 70% volume, it’s strong enough for private lessons or casual play. Push it to 100% and it still maintains clarity, but you may notice some flattening in the bass and slight harshness in the high-end if the source material is very dynamic.

The tonal profile of the speakers leans warm and smooth, which pairs nicely with Yamaha’s CFX piano voice. That said, the bass response isn’t as pronounced as you might want, especially when playing powerful left-hand chords or dramatic romantic-era pieces. There’s a modest lack of depth that becomes more noticeable when compared directly to Casio’s fuller sound.

Yamaha doesn’t include any sort of acoustic simulation like lid modeling, string resonance effects through the speakers, or directional sound. What you get is a clean stereo presentation, but it’s more flat and utilitarian.

That said, Yamaha’s speaker tuning is clean and neutral. For beginner or casual players, it’s more than enough. And because Yamaha keeps things simple, there’s less risk of distortion or imbalance from overly ambitious speaker designs. The trade-off is that it simply doesn’t feel as dynamic or alive.

Real-World Usage

In real-world conditions—meaning your living room, bedroom, or music room—the difference in speaker design becomes increasingly obvious the longer you play.

With the Casio PX-870, you feel the piano. You don’t just hear it—you interact with the sound physically. That sense of acoustic realism adds depth to your playing and keeps you more emotionally connected to the music. When you press the damper pedal and let a chord ring out, the reverb and overtones swirl around you.

With the Yamaha YDP-145, you hear the piano. It’s clean, defined, and present—but less immersive. It’s fine for learning, practicing, and casual play, but it lacks that surround-like, grand experience that makes you forget you’re playing a digital instrument.

Where this matters most:

• Dynamic classical repertoire: Casio brings out more of the music’s power.
• Pedal-heavy pieces: Casio’s resonance and projection are more convincing.
• Playing for an audience: Casio fills a room better without needing an amp.
• Private headphone practice: Both are strong here, but Casio still edges ahead with spatial simulation.

External Amplification & Outputs

Neither piano includes dedicated line outputs (like 1/4″ jacks), so if you plan to amplify externally, you’ll be limited to using the headphone jacks with a Y-split cable. That’s a minor inconvenience, but it’s worth noting if you plan to perform live or record.

If you do connect them to external speakers, the quality of the internal speakers becomes less relevant. However, for most users, internal sound is what they rely on daily—so speaker quality isn’t just a side note; it’s central to the experience.

Conclusion

There’s no contest here. The Casio PX-870 offers a far superior speaker and amplification system. With four speakers and 36 watts of power, it provides a more immersive, spatially realistic experience that makes you feel like you’re sitting in front of a real piano. The sound envelops you, with richer bass, sparkling highs, and depth that the Yamaha simply can’t match.

The Yamaha YDP-145, while perfectly functional, offers a basic 2-speaker, 16-watt system that works well for learners and smaller rooms but lacks the projection, warmth, and vibrancy of the PX-870. It’s a clean sound, but it’s confined—more “monitor” than “stage.”

If sound projection and sonic realism matter to you—and they should—the PX-870 stands head and shoulders above the YDP-145 in this category. It doesn’t just sound better. It sounds realer.

Features & Functionality

When you’re investing in a digital piano, especially at the console level, you’re not just buying sound and feel. You’re buying a whole system—one that should support your learning, creativity, convenience, and workflow. Features and functionality determine whether the instrument fits seamlessly into your life or becomes a source of limitations.

The Casio PX-870 and Yamaha YDP-145 both fall into the “essential features” tier of digital pianos. They aren’t packed with workstation bells and whistles, but they aren’t stripped-down slabs either. They’re designed to give you the core piano experience, along with a few useful extras. But the differences in how they approach features can have a big impact on how enjoyable—and practical—each piano is over the long haul.

Let’s take a close look at the key differences in features and functionality between the PX-870 and YDP-145.

Core Modes and Functions

Casio PX-870 provides all the fundamental modes you’d expect:

• Layer Mode: Allows you to combine two voices, like piano + strings or electric piano + choir. This works very well, with balanced volume levels and smooth blending.
• Split Mode: Not available. You can’t split the keyboard into two different sounds (like bass on the left, piano on the right), which may be a drawback for more advanced users or performers.
• Duet Mode: Yes. This splits the keyboard into two identical zones, useful for student-teacher setups.
• Transpose: Fully supported; lets you shift pitch up or down in semitone increments.
• Tuning: Adjustable in 0.1 Hz steps from 415.5 Hz to 465.9 Hz (very useful for ensemble playing with non-standard tuning).

Yamaha YDP-145 keeps it simple but functional:

• Dual Mode: Same as Casio’s Layer Mode—combine two voices across the whole keyboard.
• Duo Mode: Also present, with a split at middle C, perfect for duets or instruction.
• Split Mode: Also missing here, just like the PX-870. This is an area where both pianos are evenly limited.
• Transpose: Available via key combinations.
• Tuning: Adjustable, though via a more cumbersome button-key combo interface.

Verdict: Both pianos offer the basics, and neither includes a full split mode. Casio offers slightly more advanced control over tuning and layering, and its interface is less cryptic once learned.

Sound Customization

This is where the PX-870 pulls ahead significantly.

Casio gives you access to a suite of acoustic simulation settings. These are subtle but powerful features that add realism and let you tailor the sound to your preferences:

• Lid Simulation: Emulates the sound difference between a grand piano lid being fully open, half-open, or closed.
• Key-Off Response: Alters the release sound when lifting your finger—faster or slower depending on how you play.
• String Resonance: Simulates the sympathetic vibration of strings not being played directly.
• Damper Resonance: Recreates the resonance caused by pressing the damper pedal.
• Hammer Response: Adjusts the delay between pressing a key and the hammer “striking” the string.
• Hall Simulator / Reverb Settings: Includes various hall types and adjustable depth.

These settings let you shape the PX-870 into something much closer to a real grand. You can make it warm and mellow, or bright and bold. The changes are audible and meaningful, not gimmicky.

Yamaha’s YDP-145, in contrast, keeps things far more minimal. You get:

• Reverb Types: Room, Hall 1, Hall 2, and Stage.
• Reverb Depth Control: Can be increased or decreased to your preference.

That’s it. There’s no lid simulation, no damper noise control, no adjustable resonance modeling, and no user-accessible effects stack. You get what Yamaha sets as default. It sounds nice—but it’s static.

Verdict: Casio wins decisively here. The acoustic simulations on the PX-870 add depth and personalization, especially valuable for intermediate and advanced players.

Internal Recorder & Playback

Both pianos offer built-in recording capabilities, but they handle them differently.

Casio PX-870:

• 2-Track MIDI Recorder: You can record two separate tracks (left/right hand or two instruments) and play them back together.
• Max Notes: Up to 5,000 notes per recording.
• Playback: Works well, though navigation is menu-based (no screen).
• USB Playback: Supports WAV audio playback via USB drive.

Yamaha YDP-145:

• 1-Track MIDI Recorder: Only allows for one track at a time.
• Max Notes: Around 10,000 per song.
• Playback: Clear and easy, but limited in scope.
• No USB Audio Playback: USB is for MIDI only.

Casio’s two-track recorder is a big deal for learners and composers alike. You can record left hand on one track, then play along with your own accompaniment. Yamaha’s recorder is more basic—a solid sketchpad, but not a layering tool.

Verdict: Casio again comes out ahead with deeper recording and playback features.

App Integration & Control

Yamaha YDP-145 pairs with Yamaha’s Smart Pianist app, which is actually a great tool. It allows you to:

• Change voices more easily
• Adjust reverb and functions without memorizing key/button combos
• View sheet music
• Analyze songs on your phone and generate chord charts
• Record and playback

However, the app connection is not Bluetooth by default. You need a USB cable (or an optional Bluetooth adapter), and setup can be finicky.

Casio PX-870 does not have a proprietary app. You can use any third-party MIDI-compatible app, but there’s no Casio equivalent of Smart Pianist. Everything is controlled via key/button combos on the instrument itself, and while these are relatively straightforward after a few uses, there’s no visual interface or app-based GUI to speed things up.

Verdict: Yamaha wins here, but with caveats. The Smart Pianist app is excellent—but only if you take the time to set it up properly. Casio doesn’t compete in this space but remains fully functional without it.

Preset Songs & Learning Features

Casio PX-870 includes:

• 60 built-in classical pieces
• Score book available via PDF
• Ability to practice left and right hands separately
• Duet Mode for student-teacher playing

Yamaha YDP-145:

• 10 Voice Demo Songs + 50 Classical Preset Songs
• Left/right hand practice with preset songs
• Compatible with Yamaha’s learning apps

Both pianos have good built-in content for students, though Casio gives a little more interactivity. Yamaha leans on its app ecosystem to deliver learning features, which means you’ll need a phone or tablet nearby.

Verdict: Tie, depending on your setup. Casio offers more internal content; Yamaha expands through the Smart Pianist app.

User Interface & Navigation

Casio PX-870 hides its controls under the keyboard on the left side—this creates a clean visual appearance, but it also means no screen or visual feedback. You must memorize button/key combos for most functions. Once you learn them, it’s fine, but there’s a learning curve.

Yamaha YDP-145 places a small set of buttons near the left front panel. These are always visible, making it easier to switch voices or adjust settings. However, without a screen, you still rely on LED blinks and key-press combinations to change most deeper functions.

Verdict: Yamaha is a little more user-friendly out of the box, but Casio looks cleaner. It’s a trade-off between elegance and ease of use.

Auto Power-Off, Metronome, and Other Utilities

Both pianos include the usual tools:

• Metronome with adjustable tempo and time signatures
• Auto power-off after inactivity
• Master tuning and transposition
• Pedal settings for half-pedal response (on compatible pedals)

Casio gives more control over pedal response and key noise simulation. Yamaha keeps it simpler.

Final Thoughts

In the realm of features and functionality, the Casio PX-870 offers more depth and realism, especially for players who care about acoustic nuance. From its lid simulation and key-off response to its two-track recorder and onboard customization, it’s built for players who want to grow, explore, and tweak.

The Yamaha YDP-145 takes a more streamlined approach. It’s user-friendly, clean, and integrates well with Yamaha’s Smart Pianist app—but it’s clearly designed for players who prioritize simplicity over depth.

If you’re the type of player who enjoys shaping your sound, experimenting with setup, and using built-in tools to elevate your performance, the PX-870 is the better fit. If you want plug-and-play reliability and the comfort of Yamaha’s app ecosystem, the YDP-145 still offers a satisfying experience—but with more limitations.

In the end, Casio feels like an instrument. Yamaha feels like a tool. Both have their place—but only one invites you to dig deeper.

Connectivity

Connectivity might not be the flashiest category when shopping for a digital piano, but in practice, it can make a huge difference in how useful and versatile your instrument is. Whether you want to connect to learning apps, record MIDI into a DAW, play along with backing tracks, or simply plug in headphones for silent practice, the connection options on a digital piano define how it fits into your larger setup—be it a practice room, teaching studio, or home studio.

The Casio PX-870 and Yamaha YDP-145 both aim to provide solid basic connectivity without overwhelming the user. These aren’t stage pianos or studio workstations—they’re upright-style digital pianos designed primarily for home use. That said, one of these models is a bit more forward-thinking in how it handles integration with modern tech, and the difference may influence your buying decision, especially if you’re looking for flexibility and future-proofing.

Let’s break down everything you need to know.

Core Physical Connections

Both the PX-870 and YDP-145 are relatively minimalist when it comes to physical ports and jacks. You won’t find line outputs, XLRs, or audio ins like on professional stage keyboards—but you will find the essentials for most home players.

Casio PX-870 Physical Ports:

• USB Type B (USB to Host): This is the main port for connecting the PX-870 to a computer, tablet, or smartphone. It supports MIDI-over-USB, which allows you to use the piano as a MIDI controller or to record your playing in a DAW like Logic, Ableton, FL Studio, or GarageBand. It does not transmit audio—only MIDI data.
• Two 1/4″ Headphone Jacks: Located under the left side of the keyboard. These serve a dual purpose: silent practice and stereo audio output. You can use them to connect headphones or external speakers (using a stereo TRS to dual TS or RCA cable).
• Pedal Connector: A proprietary connector for the three-pedal unit included with the stand.
• No Line Out / Audio In / Bluetooth: The PX-870 doesn’t include traditional audio outputs or inputs, nor does it offer any built-in Bluetooth connectivity for audio or MIDI.

Yamaha YDP-145 Physical Ports:

• USB to Host (Type B): Just like the PX-870, this allows MIDI connectivity to computers or smart devices. No audio over USB.
• Two 1/4″ Stereo Headphone Jacks: Located on the front left panel. These are great for silent practice and can also serve as pseudo line outs.
• Pedal Connector: Standard for the built-in pedal system.
• No Dedicated Audio In / Audio Out: Like the PX-870, the YDP-145 lacks any 1/4″ line outs or auxiliary inputs.
• Optional Bluetooth via Adapter: While not built-in, the YDP-145 can be paired with Yamaha’s optional UD-BT01 or MD-BT01 Bluetooth adapters for wireless MIDI transmission. However, this adds cost and setup complexity.

MIDI & DAW Integration

If you’re a beginner, this might not seem relevant now—but if you ever want to record your performance, experiment with software instruments, or take lessons via online platforms, MIDI integration becomes essential.

Both the Casio PX-870 and Yamaha YDP-145 allow MIDI-over-USB, which means you can connect them directly to a computer or mobile device using a USB cable and use them as MIDI input devices. This lets you:

• Record MIDI into your DAW
• Use virtual instruments (e.g., Native Instruments, Spitfire, Addictive Keys)
• Control notation software like MuseScore, Sibelius, or Finale
• Interact with learning apps like Simply Piano, Flowkey, or Playground Sessions

Casio PX-870 supports standard MIDI class compliance, meaning it doesn’t need drivers for most systems. It works well across Windows, macOS, and iOS with plug-and-play functionality. This is especially nice for beginners who don’t want to mess with driver installations.

Yamaha YDP-145, likewise, is USB class-compliant, but Yamaha also offers a driver and utility software for more advanced MIDI setups. This is helpful in larger studio environments or if you’re using complex setups with multiple MIDI devices.

Yamaha’s key advantage here is the optional Smart Pianist app integration. More on that below.

App Integration & Smart Connectivity

Casio PX-870 doesn’t have any proprietary app integration. You can still use it with MIDI-based apps like GarageBand or Flowkey, but you’re relying on third-party solutions.

If you want to tweak the piano’s internal settings, you’ll need to use the keyboard shortcuts outlined in the manual. This works fine once memorized, but it can be tedious if you’re adjusting things frequently (e.g., reverb depth, tuning, metronome settings). There’s no screen or GUI to streamline this process.

Yamaha YDP-145, however, shines in this area with its Smart Pianist app.

Smart Pianist allows users to:

• Select voices
• Adjust reverb and other settings
• Record performances
• Control metronome functions
• Analyze songs in your music library and display chord symbols
• View digital sheet music synced to your playing

You can connect the YDP-145 to a smart device using a USB cable or optionally via Yamaha’s UD-BT01 or MD-BT01 Bluetooth adapters. It’s important to note that this Bluetooth solution is only for MIDI—not for streaming audio. You’ll still need wired headphones or speakers for listening.

For users who value ease of use and interactive learning tools, Yamaha’s app ecosystem is a big plus. Casio has no equivalent, which makes the PX-870 feel a little more old-school in this department.

Verdict: Yamaha takes the win here. The Smart Pianist app isn’t just a gimmick—it makes using the piano easier and more enjoyable, especially for beginners or tech-savvy users.

Headphone Support & Private Practice

Both instruments support dual headphone jacks, which means two people can play together silently—great for teaching, duets, or practice sessions in shared spaces.

Casio adds an extra layer here with a Headphone Mode EQ. This setting subtly adjusts the spatial image and tonal balance to make the experience of playing with headphones feel more natural and less fatiguing. It simulates how sound would bounce off a real piano’s soundboard, which makes long practice sessions more immersive.

Yamaha’s headphone output is clean and functional, but it doesn’t offer the same spatial simulation. Still, the sound quality is good, and Yamaha’s default voicing is easy on the ears, even through earbuds.

Verdict: Slight edge to Casio for headphone realism; both are solid in quiet practice support.

External Audio and Performance Use

Neither the PX-870 nor YDP-145 includes dedicated line out jacks, which may be disappointing for gigging musicians or anyone looking to connect to a PA system, amp, or mixer. You can still do this using the headphone jack with an adapter (e.g., stereo 1/4″ TRS to dual 1/4″ TS or RCA), but you may need to adjust volume carefully to avoid distortion.

Neither model has line inputs, meaning you can’t connect an external music source like a phone or MP3 player directly into the piano’s speakers. This limits your ability to play along with backing tracks through the built-in system.

Also, neither model has onboard Bluetooth audio, so you can’t stream music from your phone wirelessly. This is a notable omission, as many newer digital pianos (even cheaper ones) are beginning to include this feature.

Verdict: Both are equally limited here. If external performance or streaming is a priority, you may want to look at higher-end models like the Casio AP-470 or Yamaha’s Clavinova line.

Summary: Connectivity Comparison

Feature	Casio PX-870	Yamaha YDP-145
USB to Host (MIDI)	Yes	Yes
USB Audio	No	No
Bluetooth MIDI	No	Optional (via adapter)
Bluetooth Audio	No	No
Headphone Jacks	2 (¼”)	2 (¼”)
Line Out	No (headphone jack only)	No (headphone jack only)
Line In	No	No
App Integration	No	Yes (Smart Pianist)
Headphone EQ / Simulation	Yes	No

Final Verdict

In terms of raw connectivity, both pianos cover the basics—MIDI over USB, dual headphone jacks, and class-compliant plug-and-play operation. If that’s all you need, both will serve you well.

But when you look at user experience and app integration, Yamaha pulls ahead thanks to Smart Pianist and the optional Bluetooth MIDI support. These features make the piano easier to use, especially for beginners who prefer a visual interface over memorizing key combinations.

That said, Casio fights back with better headphone simulation and a slightly more polished USB MIDI setup. If you’re a more traditional user who just wants to play and occasionally connect to a DAW, the PX-870 is perfectly capable.

Ultimately, if interactivity and app control are important to you—or if you like tweaking settings from your phone—go with the Yamaha YDP-145. If you’re fine with a more manual, self-contained setup but want excellent headphone sound and hassle-free MIDI, the Casio PX-870 still delivers the essentials with solid execution.

Pedals & Accessories

Pedals and accessories are often overlooked when evaluating a digital piano, but they have a direct impact on your playing experience—especially if you’re serious about replicating the feel of an acoustic instrument. For classical music, expressive jazz, or even just dynamic pop ballads, a responsive and realistic pedal system is critical. Accessories like benches, music rests, and included extras can also influence the overall value of the package.

In this section, we’ll examine how the Casio PX-870 and Yamaha YDP-145 compare in terms of their pedal systems, included accessories, and general playability enhancements.

Pedal Systems

Casio PX-870 comes with a three-pedal unit built into the cabinet. It includes the following:

• Damper (right) – With half-pedal functionality and excellent dynamic response. This is the most important pedal for sustaining notes and is used in almost every style of music.
• Sostenuto (middle) – Allows you to sustain selected notes while others remain unaffected. This is more commonly used in classical and jazz.
• Soft (left) – Slightly reduces the volume and alters the tone of the notes, just like the una corda pedal on a real grand.

What sets Casio’s pedal system apart is how solid and realistic it feels. The damper pedal in particular supports half-pedaling, meaning it can detect partial presses to vary the sustain depth—just like an acoustic piano. This allows for more nuanced expression, especially in romantic or impressionist repertoire. The pedal resistance is weighty and natural, with a satisfying amount of travel.

Yamaha YDP-145 also features a built-in three-pedal unit, offering:

• Damper (right) – Supports half-pedaling, although the range and resolution are not as finely tuned as Casio’s.
• Sostenuto (middle) – Functional, but more basic in implementation.
• Soft (left) – Works as expected, though the tonal difference is more subtle compared to Casio.

The Yamaha pedal system is consistent and reliable, with a feel that mirrors Yamaha’s upright acoustic pianos. However, it’s slightly less responsive than Casio’s when it comes to fine-tuned pedaling. It also feels a bit lighter underfoot, which may or may not appeal to your taste depending on how heavy a pedal you’re used to.

Verdict: Casio edges ahead here. Its pedals feel a bit more authentic and expressive, particularly the damper pedal. Yamaha’s are solid, but slightly more utilitarian.

Included Accessories

Both digital pianos come as full bundles with:

• Furniture-style stand
• Triple-pedal unit
• Music rest
• Matching bench (depending on retailer)

Casio PX-870 sometimes includes a basic bench with purchase, but the default bench is on the shorter side and may feel too low for taller adults. The music rest is wide enough for two to three pages of sheet music but is fixed and non-adjustable.

Yamaha YDP-145 typically comes with a more traditional-looking bench that’s a better ergonomic match for adult players. The music rest is taller than Casio’s and more rigid—better for thick books or iPads.

Verdict: Yamaha may have the slight edge on accessories, particularly with a more comfortable bench and more durable music stand. But Casio’s pedal implementation is stronger, which matters more if you’re focused on expressive playing.

Overall Take

If pedal realism and dynamic control matter to you, Casio wins this category with its superior damper response and authentic feel. If you care more about accessories out of the box—like bench height or sturdier sheet holders—Yamaha holds its ground, though the differences are relatively minor.

Conclusion

Choosing between the Casio PX-870 and the Yamaha YDP-145 ultimately comes down to priorities: do you want a more immersive, realistic piano experience, or a more traditional, simplified approach with trusted brand reliability?

The Casio PX-870 clearly stands out in several key areas. Its Tri-Sensor Scaled Hammer Action II offers a more refined, responsive feel than Yamaha’s GHS action. The sound engine is richer and more expressive, with features like lid simulation, key-off resonance, and a four-speaker projection system that creates a much more realistic acoustic experience. Casio also gives you more control over your sound and deeper recording capabilities, making it a smart long-term investment for serious players.

The Yamaha YDP-145, on the other hand, is all about consistency and ease of use. Its Smart Pianist app integration is a big plus for beginners or casual players who want a visual interface to access sounds and settings. The piano’s clean, warm tone and familiar upright styling will appeal to players who want simplicity and a traditional look. Yamaha also has the edge in brand prestige and global support infrastructure, which might be important if you’re thinking long-term.

If you’re looking for expressiveness, sound realism, and room to grow, the PX-870 is the better value. If you prioritize ease-of-use, clean aesthetics, and dependable fundamentals, the YDP-145 won’t let you down.

Bottom line: Casio delivers more piano for the price, while Yamaha offers a solid, no-frills experience with user-friendly touches. Both are good, but only one truly feels like a step closer to a real acoustic grand. For most players—especially those beyond the beginner stage—the PX-870 is the one that inspires.