Yamaha DGX-670 vs Yamaha P-125

If you’re stuck between the Yamaha DGX-670 and the Yamaha P-125, you’re not alone. These two digital pianos are popular picks for intermediate players and ambitious beginners looking for great sound and feel without dropping thousands on a high-end model. But while both bear the Yamaha badge, they’re quite different in terms of design, features, and who they’re really for.

I’ve spent time with both pianos—played them, tested their features, poked around their menus, and really got a feel for what they offer. In this review, I’ll walk you through everything: design, key feel, sound quality, speaker performance, features, connectivity, value for money—everything you’d want to know before making a decision.

So let’s break it down and figure out which one deserves a place in your setup.

Yamaha DGX-670 vs Yamaha P-125 Comparison Chart

Category	Yamaha DGX-670	Yamaha P-125
Price	Check the best price on Amazon	Check the best price on Amazon
Keyboard	88 keys, Graded Hammer Standard (GHS)	88 keys, Graded Hammer Standard (GHS)
Key Surface	Smooth plastic	Smooth plastic
Touch Sensitivity	4 types (Soft, Medium, Hard, Fixed)	4 types (Soft, Medium, Hard, Fixed)
Sound Engine	Pure CF Sound Engine + VRM Lite	Pure CF Sound Engine
Polyphony	256 notes	192 notes
Voices	630 voices + Super Articulation Voices	24 voices
Rhythms / Styles	263 accompaniment styles (arranger)	20 basic rhythms (drums only)
Recording	MIDI multi-track + audio to USB (WAV)	1-song MIDI recording only
USB Audio Interface	Yes (2-way audio and MIDI)	No (MIDI only via USB)
Bluetooth Audio	Yes (audio in only)	No
Mic Input	Yes (1/4″ with effects)	No
Display	7” full-color LCD	No screen
Pedals	Single pedal input (included) + LP-1 (optional)	Single pedal input (included) + LP-1 (optional)
Speaker System	2 x 6W speakers with DSP + stereo optimizer	2 x 7W amplifiers, 4-speaker projection
Aux In	Yes	No
Headphone Jacks	1 (1/4” stereo)	2 (1/4” stereo)
Line Out	Via headphone jack	Via headphone jacks
USB Ports	USB to Host + USB to Device	USB to Host only
App Compatibility	No Smart Pianist support	Yes – Yamaha Smart Pianist app
Dimensions (W x D x H)	1,397 x 445 x 151 mm (without stand)	1,326 x 295 x 166 mm
Weight	21.4 kg (47.2 lbs)	11.8 kg (26 lbs)
Stand / Pedal Option	Optional L-300 stand + LP-1 3-pedal unit	Optional L-125 stand + LP-1 3-pedal unit
Power Supply	PA-300C (included)	PA-150B (included)
My individual reviews	Yamaha DGX-670 review	Yamaha P-125 review

Design & Build Quality

Let’s start with what you first notice when unboxing or walking up to a digital piano: its design. The look, feel, and overall build quality might not change how it sounds, but it definitely affects your day-to-day experience—whether you’re placing it in a home studio, schlepping it to gigs, or trying to match it with your furniture.

Here’s how the Yamaha DGX-670 and P-125 stack up.

Yamaha DGX-670: A Portable Powerhouse (That’s Not So Portable)

At first glance, the DGX-670 doesn’t scream “digital piano” in the traditional sense. It looks more like a high-end arranger keyboard or a portable workstation you’d find in a professional studio. Yamaha clearly designed this with a broader musical toolset in mind.

The unit itself is made of solid plastic casing with a clean matte finish. It feels sturdy but not heavy-duty like a wooden cabinet model. Still, there’s nothing flimsy about it. The controls are well-placed, the knobs and buttons feel tactile and responsive, and nothing feels like it’s going to break off after a few months of use.

What immediately catches your eye is the 7-inch color LCD screen in the center of the top panel. It’s bright, full-color, and miles ahead of the small monochrome displays found on older Yamaha models. You can clearly see instrument choices, mixer settings, sheet music, chord charts, and even karaoke lyrics. If you’re used to using menus on keyboards, this screen alone is a huge quality-of-life upgrade.

Surrounding the screen are tons of buttons, sliders, and a rotary dial for selecting sounds, tweaking accompaniment, adjusting layers, and controlling pretty much every feature you can imagine. It’s intuitive once you get used to it, but it’s a lot to take in at first—especially if you’re new to digital instruments. That’s not a bad thing, though. It just means the DGX-670 is clearly designed for more advanced users or people who want to grow into the instrument.

Now, let’s talk size and weight.

At 21.4 kg (about 47 lbs), this thing is no lightweight. Add the optional stand and triple-pedal unit, and you’re looking at a setup that’s closer to an upright piano in terms of footprint. It’s technically portable—you can lift it and move it—but it’s not something you’d want to lug around regularly unless you’re really committed. For context, it’s about the size of a small desk once assembled.

That said, Yamaha’s optional stand (L-300) and pedal unit (LP-1) integrate beautifully and give it a polished, furniture-like appearance. If you’re setting up a semi-permanent music space at home, it fits right in. It looks serious and feels like a real musical centerpiece, not just a keyboard sitting on a folding stand.

Another underrated part of the DGX-670’s design is the music rest. It’s wide, solid, and can hold multiple pages of sheet music or a thick book without wobbling. If you’re using a tablet or laptop, it supports that, too. The physical design complements its digital power really well—it’s the kind of setup that invites long creative sessions, not quick practice stints.

So, to sum up: the DGX-670 is a full-featured, visually striking instrument that offers tactile control and lots of flexibility—but it sacrifices portability and minimalism to get there.

Yamaha P-125: Sleek, Simple, and Purpose-Built

Now, the P-125 takes a completely different approach. It’s the kind of digital piano that knows exactly what it is and doesn’t try to be anything else.

The design is minimal, modern, and clean. You’ve got a matte plastic case that feels durable but understated. It’s available in black or white, and either version looks great whether it’s in a bedroom, a studio, or on stage. There are no unnecessary design flourishes. It’s functional and unfussy, which is exactly what many players want in a no-nonsense digital piano.

The control panel is small and straightforward, with a simple row of buttons for sound selection, metronome, recording, and some basic features like layering or splitting the keyboard. There’s no screen—what you get instead are small indicator LEDs and a button-based interface. If you want more control or deeper editing, Yamaha encourages you to use their Smart Pianist app, which connects via USB to your phone or tablet.

And honestly, that’s kind of brilliant. By offloading complexity to the app, Yamaha kept the P-125’s physical design elegant and approachable. No distractions, no clutter. It looks like a piano, not a spaceship.

The P-125 is also much more portable than the DGX. Weighing in at 11.8 kg (just over 26 lbs), it’s light enough to carry under one arm and fits in most gig bags. If you’re a gigging musician or a music teacher traveling between lessons, this is a major plus. Even if you’re not going anywhere, the ability to move it from your bedroom to the living room without breaking your back is a huge convenience.

You can pair it with Yamaha’s L-125 stand and LP-1 pedal unit for a more fixed setup. These accessories are sold separately but give it a more finished look and proper three-pedal functionality, which is great for classical players. Even with the stand attached, though, the P-125 still maintains a light profile and small footprint.

The music rest is simpler than the DGX’s—just a plastic sheet that slots into the top—but it does the job. It’s stable enough for sheet music or a tablet, though it’s not quite as wide or robust. That’s a small trade-off considering the P-125’s portability and minimal design.

Durability-wise, the P-125 feels solid. The keybed doesn’t wobble, and the casing doesn’t creak under pressure. It’s clearly designed to handle real-world use, whether that’s on a stage or in a classroom. There are no fragile feeling parts, and the matte finish resists fingerprints well, which is something you’ll appreciate if you’re using it often.

Design Philosophy: Who Each One Suits

What’s interesting here is that Yamaha has built these two instruments with totally different philosophies in mind.

• The DGX-670 is for musicians who want more. More control, more features, more tones, more flexibility. It’s a music production tool wrapped in a piano-like interface. But that comes with trade-offs: it’s heavier, more complex, and less portable.
• The P-125 is for players who want less—but in a good way. It’s focused, easy to use, and doesn’t get in your way. You turn it on and play. No menu diving, no complex setups. And if you want to dig deeper, the Smart Pianist app gives you a slick touchscreen interface without cluttering the piano itself.

So, when you’re thinking about design and build, ask yourself: do I want something that looks and feels like a classic digital piano (P-125)? Or do I want a feature-rich, studio-ready hub with a workstation vibe (DGX-670)?

Final Thoughts on Design

Here’s the short version:

• DGX-670: Bold design, integrated screen, lots of tactile controls. Best for stationary setups and creative work.
• P-125: Sleek, minimalist, ultra-portable. Best for players who want simplicity, portability, and focus.

Neither is badly built—in fact, both are well-constructed and thoughtfully designed for their purpose. It just comes down to what kind of user you are.

If your setup is going to be mostly stationary and you want your instrument to double as a full music-making hub, the DGX-670 is hard to beat. But if you prioritize simplicity and want to be able to pick up and play anywhere, the P-125 nails it.

Keyboard Feel (Action)

Let’s talk about the part of the instrument you interact with most—the keys. This is often a make-or-break factor when choosing a digital piano, and with good reason. No matter how many sounds or features a keyboard has, if it doesn’t feel right under your fingers, you’re not going to enjoy playing it.

The Yamaha DGX-670 and Yamaha P-125 both use Yamaha’s Graded Hammer Standard (GHS) key action. On the surface, that means they offer identical key mechanisms. But there are still subtle differences in context and experience that are worth unpacking.

Let’s dive into what GHS is, how it performs in real-world use, and how it holds up for different types of players.

What is GHS (Graded Hammer Standard)?

GHS is Yamaha’s most common weighted action for entry-level to mid-range digital pianos. It’s designed to simulate the feel of an acoustic piano’s hammer mechanism: heavier in the bass and lighter in the treble.

The term “graded” refers to that weight difference across the keyboard—just like a real grand piano, where the lower keys have more resistance due to larger hammers and strings, while the higher keys feel lighter and quicker.

Compared to Yamaha’s higher-end actions like GH3, NWX, or GrandTouch, GHS is on the lighter side. That makes it ideal for beginners and intermediate players, but it might leave advanced or professional pianists wanting a little more weight and resistance.

Key Surface & Material

Both the DGX-670 and the P-125 have plastic keys with a smooth matte finish. There’s no synthetic ivory or ebony texture like you’d find on Yamaha’s higher-tier models. That’s not necessarily a dealbreaker, but it’s something to be aware of if you’re used to the grippier feel of textured keytops.

The keys are well-built, though. There’s no rattling, creaking, or excessive bounce. The return action is quick enough for fast passages, and the weighting is consistent across the entire keybed. For the price range, the quality here is solid.

In day-to-day playing, the keys don’t feel slippery or overly glossy, but if your hands sweat during long sessions, you might find yourself wishing for a little more grip. That’s one of the minor trade-offs of GHS—perfectly fine for most players, but not top-tier tactile feedback.

Heaviness & Resistance

Here’s where things get a bit subjective.

If you’re transitioning from an unweighted or semi-weighted keyboard (like a synth or basic MIDI controller), GHS will feel like a major upgrade. You’ll immediately notice the weight and responsiveness under your fingers. It encourages proper finger technique and develops hand strength the way an acoustic piano would.

But if you’re used to an acoustic upright or grand, GHS might feel a bit too light. Especially in the bass register, the resistance is noticeably less than on a real hammer mechanism. This isn’t a flaw—it’s a design choice that prioritizes accessibility and ease of play.

It’s worth noting that GHS tends to feel better over time. When you first play it, especially if you’re picky about touch, it might seem a bit springy or plasticky. But after a few hours or days of playing, your hands adapt, and the action starts to feel more natural.

Also, some users report that the DGX-670’s keys feel slightly more planted and stable than the P-125’s. That’s not because of a different action—it’s likely due to the heavier chassis of the DGX and the internal damping around the keybed. When a keyboard is housed in a sturdier, larger frame, you sometimes get slightly better feedback just because there’s less vibration and movement in the body itself.

That said, any difference between the two is subtle, and if you weren’t playing them side by side, you probably wouldn’t notice it.

Expressiveness & Velocity Sensitivity

Both keyboards offer velocity-sensitive keys, which means the harder you play, the louder the sound (and vice versa). They don’t have aftertouch, which is normal for this price range, but they do support dynamic expression through touch.

Yamaha offers several touch response settings—Soft, Medium, Hard, and Fixed. This allows you to tweak the sensitivity to match your playing style or the specific piece you’re working on. For example:

• Hard: Great for players with a heavy touch or those who want maximum control over dynamics.
• Soft: Better for children or anyone with a very light touch.
• Fixed: All notes play at the same volume, useful for organ sounds or MIDI sequencing.

The range of velocity response is quite decent. You can play delicate pianissimos and powerful fortissimos without feeling like the keyboard is fighting you. For expressive playing—especially in genres like classical, jazz, or ballads—this is important.

Is it as expressive as a $3,000 Clavinova? No, but it’s surprisingly capable for the price range.

Suitability for Different Players

Let’s talk real-world usability for different types of pianists.

Beginners

GHS is ideal for beginners. It provides a solid foundation for learning good technique and developing finger strength, but it’s not so heavy that it becomes a barrier. You won’t get tired after 20 minutes of practice, which is key to staying motivated.

Both the P-125 and DGX-670 make smart beginner pianos, and the key feel is a big reason why. It’s forgiving but still realistic enough to build proper habits.

Intermediate Players

For intermediate pianists—those working through classical pieces, jazz improvisation, or even learning pop arrangements—GHS still holds up well. The action is fast enough for most repertoire, and the weight is close enough to an acoustic to make the transition smooth if and when you switch to a real piano.

If you’ve been playing for a couple of years and want something that won’t hold you back, either of these keyboards will do the trick. Just don’t expect the same level of nuance you’d get from a grand or high-end hybrid.

Advanced & Classical Pianists

If you’re an experienced pianist used to a real grand or upright, you may find GHS lacking in depth and resistance. Rapid repeated notes, complex trills, and precise control in the softest dynamics will feel more limited. That’s not to say you can’t play advanced material on these keyboards—you absolutely can—but it might not feel as satisfying or responsive as higher-end actions.

If key feel is your absolute top priority and you’re playing Liszt or Rachmaninoff every day, you might want to look into Yamaha’s GH3 or GrandTouch action instead.

Noise & Keybed Acoustics

An often overlooked aspect of digital piano keybeds is noise—the mechanical thud of the keys when you press them down or release them.

The P-125 is reasonably quiet, especially for a lightweight model. It has a clean, soft landing and minimal bounce noise. The DGX-670, because of its larger body and slightly more reinforced design, has an even more dampened key response. It’s not silent, but in a quiet room, you won’t be distracted by mechanical sounds from the keybed.

If you play with headphones a lot, that matters more than you’d think.

Final Thoughts on Key Feel

Here’s the bottom line:

• Both keyboards use Yamaha’s GHS action—a solid, reliable keybed that’s great for beginners and intermediates, but slightly lightweight for advanced players.
• The DGX-670 might feel a hair more stable due to its chassis, but the difference is minimal.
• Key texture is smooth plastic, no simulated ivory or wood feel.
• Velocity sensitivity is good, with customizable touch curves.

So if you’re choosing between these two based on key feel alone, it’s basically a tie.

Verdict:

• For casual players and learners: either is a solid choice.
• For serious classical pianists: you might want to look higher up the Yamaha range.
• For everyone else: GHS delivers a very playable, satisfying experience at a great value.

Sound Quality

Sound is everything in a digital piano. You can have the most realistic key action in the world, but if the sound doesn’t inspire you, the experience falls flat. Yamaha has built its reputation on consistently delivering excellent piano tones across its entire product line, and both the DGX-670 and the P-125 continue that tradition.

That said, the way they deliver those sounds — and what sounds are available — differs quite a bit. In this section, we’ll explore:

• Piano tone realism
• Sound engines used
• Sound variety and quality across other instruments
• Effects and acoustic modeling
• Polyphony
• How they sound through headphones and external speakers
• Suitability for different playing styles

Piano Sound Engine: The Pure CF Standard

Let’s start with what they have in common.

Both the DGX-670 and the P-125 are powered by Yamaha’s Pure CF Sound Engine. This is a high-resolution sampling engine that’s been used in Yamaha’s P-series and entry-level Clavinovas for years. The flagship piano tone is sampled from Yamaha’s CFIIIS 9-foot concert grand, which is known for its rich, clear, and powerful tone — very balanced across the frequency range.

Yamaha’s sampling is incredibly detailed, even on lower-cost models. They’ve captured multiple velocity layers, dynamic response, and nuanced tonal changes depending on how hard or soft you play. For most users, the Pure CF sound engine provides an authentic and satisfying piano experience.

So if you’re wondering whether these instruments sound like a real Yamaha grand, the answer is: not exactly — but impressively close for the price.

DGX-670: The Clear Winner in Sound Depth and Variety

Now, this is where the DGX-670 separates itself.

While it uses the same Pure CF core, Yamaha has enhanced the DGX-670 with Virtual Resonance Modeling (VRM Lite). This technology simulates the complex resonances of a real acoustic piano: the sound of strings vibrating sympathetically, the wooden cabinet resonance, the sound of the damper pedal lifting — all the subtle, resonant overtones that you feel when playing an acoustic grand.

You really notice this when using a sustain pedal. On the DGX-670, the sound expands in a more lifelike way. There’s a subtle richness and spatial quality that’s missing in the P-125. It’s not full-blown VRM like in Yamaha’s Clavinova series, but even this “lite” version makes the piano sound feel more alive and complex.

And it doesn’t stop at acoustic piano sounds. The DGX-670 has 630 voices across a massive range of instruments, including:

• Multiple acoustic and electric pianos
• Organs, strings, brass, woodwinds
• Synths, pads, basses
• Guitars, ethnic instruments
• Orchestral and cinematic sounds
• Drum kits and FX
• And even “Super Articulation” voices that add human-like nuances to instruments like guitar, saxophone, or violin

This isn’t just a digital piano — it’s practically an arranger workstation. And it’s not just about quantity — the quality of these voices is excellent, especially for the price. The electric pianos are warm and vintage, the strings are lush, and the synth sounds would fit right into a film score or pop production.

Add to that the accompaniment styles — 263 of them — and you’ve got a full backing band that responds dynamically to your chords. It’s a blast for songwriting or jamming, and really brings the DGX to life in a way that no pure digital piano can match.

Piano Verdict for DGX-670:

• Concert Grand sound is rich, dynamic, and full of character
• VRM Lite adds subtle realism and resonance
• Multiple acoustic and electric piano options with high-quality sample layers
• Incredible variety across all genres
• Ideal for composers, songwriters, hobbyists, and performers who want more than just a piano

Yamaha P-125: Focused, Minimal, and Clean

The P-125 takes a much more minimalist approach. It still uses the Pure CF Sound Engine, so its core piano tone is every bit as strong as the DGX-670’s — just without the added realism from VRM.

You get four different grand piano variations:

1. Main (Concert Grand) — clear, balanced, slightly bright
2. Bright — more bite and edge, good for pop and rock
3. Mellow — softer and more intimate, ideal for ballads and jazz
4. Pop Grand — a punchy, forward tone for modern music

Each of these is well sampled, responsive, and dynamic. The Mellow Grand is especially nice for expressive solo playing — it has a smooth, buttery tone that really shines through headphones.

But beyond these, you’re limited to 24 total voices. That includes:

• Electric pianos (Rhodes-style, DX-style)
• Jazz and pipe organs
• Vibraphone
• Strings and synth pads
• Bass (for split mode)

The electric pianos are particularly good — warm, classic, and not too processed. The strings are usable but not as layered or realistic as what you get on the DGX-670. Still, for someone who just wants a variety of basic tones to layer or split, the P-125 covers the essentials well.

Piano Verdict for P-125:

• Pure CF Grand Piano is excellent and expressive
• Less depth and resonance due to lack of VRM
• Great Rhodes/Wurlitzer-style electric pianos
• Limited selection but high quality where it counts
• Best for piano-focused players who don’t need tons of variety

Polyphony

Polyphony refers to how many notes can sound at once. This matters especially when using sustain pedal, layering sounds, or playing with accompaniment.

• DGX-670: 256-note polyphony
• P-125: 192-note polyphony

In practice, both are more than sufficient for solo piano playing, even complex classical pieces. But the DGX-670’s higher polyphony gives it more headroom for layering, accompaniment styles, and intense multi-voice arrangements.

If you plan to play dense, layered arrangements or use the backing tracks and auto accompaniment, the DGX-670’s higher polyphony helps keep things from cutting out.

Speakers vs Headphones

Speakers can really shape how an instrument’s sound is perceived — especially if you’re not using external monitors.

• DGX-670: Two 6W speakers with intelligent DSP and stereo optimization. It sounds bigger and more immersive. With VRM and the wider speaker placement, the sound disperses more like an acoustic piano. The headphone stereo optimization is a nice touch too — it makes headphone practice feel less “in your head” and more natural.
• P-125: 2 x 7W amplifiers with four speakers (two upward-facing, two downward). It’s impressive for such a slim design. The sound projection system gives a surprisingly full sound with strong bass and decent treble clarity. Through headphones, it still sounds great — clean and intimate — but lacks the DGX’s spatial realism.

If you plan to mostly play through headphones, both are solid. But if you’re relying on onboard speakers for performance or home practice, the DGX-670 definitely pulls ahead in fullness and stereo spread.

Which Sounds Better, Overall?

This comes down to your priorities.

• If you’re looking for realism, acoustic piano depth, and tons of instrument variety — the DGX-670 is the clear winner. Its VRM Lite, Super Articulation voices, and arranger features give it a major edge.
• If you care most about a great core piano tone in a compact, no-nonsense package — the P-125 delivers beautifully. It may not be flashy, but it sounds really good where it counts.

Final Sound Quality Verdict

Aspect	DGX-670	P-125
Piano Engine	Pure CF + VRM Lite	Pure CF
Acoustic Piano Tones	Deep, resonant, layered	Clean, balanced, less resonant
Voices Available	630 total + Super Articulation	24 total
Electric Pianos	Warm and varied	Fewer but excellent quality
Polyphony	256	192
Onboard Speakers	Wide, immersive sound	Punchy, compact, room-filling
Headphone Experience	Stereo optimization, more spatial	Clean and intimate

If you want sonic versatility, ambient realism, and a full “musician’s toolbox,” the DGX-670 easily justifies its higher price. If you want to sit down, play piano, and not think about anything else, the P-125 keeps things clean and focused.

Speakers & Sound Output

A digital piano’s built-in speakers can make or break the experience—especially if you’re not using external monitors or playing through a PA system. The best piano samples in the world don’t mean much if they sound flat, boxy, or tinny coming out of the onboard speakers.

So how do the Yamaha DGX-670 and P-125 stack up when it comes to built-in sound? Let’s break down wattage, design, projection, clarity, and how each piano performs in different environments—from small rooms to louder spaces.

Yamaha DGX-670: Wide, Spacious, and Refined

At first glance, the DGX-670’s speaker system doesn’t look like much on paper. It features:

• Two 6-watt amplifiers
• Two built-in speakers
• Bass reflex ports

Total output? 12 watts. That might seem underwhelming compared to stage pianos with 20W+ systems, but the story changes when you actually hear it.

The DGX-670 has a more advanced speaker tuning system and intelligent DSP (digital signal processing) that automatically adjusts the EQ depending on your volume, sound choice, and room acoustics. It’s subtle, but effective. At low volumes, the sound retains warmth and clarity. At high volumes, it doesn’t distort or become piercing.

What you get is a wide stereo field, surprisingly full bass for a mid-range piano, and a nuanced midrange that brings out piano resonance, especially in the Concert Grand voice. Chords feel spacious, solo lines pop without being harsh, and electric pianos have a nice shimmer without sounding metallic.

There’s also Stereo Optimizer for headphone use, which simulates how a piano would sound from a seated position. Instead of everything being “inside your head” (as is common with headphones), the sound feels like it’s coming from in front of you. This creates a much more natural experience when practicing privately.

Another thing that sets the DGX apart: its cabinet design and speaker placement. The body is larger and more resonant, so even with only 12 watts, it delivers a room-filling sound that feels bigger than the specs suggest. It won’t replace a good sound system, but for home use, small performances, or playing in a medium-sized room, it’s more than enough.

Verdict for DGX-670:

• Rich, immersive stereo sound
• Surprisingly full bass for 12W
• Excellent clarity across the frequency range
• DSP-enhanced tone balance
• Ideal for home practice, songwriting, or casual performance

Yamaha P-125: Compact, Clever Sound Projection

Now let’s look at the Yamaha P-125. It has:

• Two 7-watt amplifiers
• Four speakers total (two upward-facing, two downward-firing)

That gives it a total output of 14 watts, technically a bit more powerful than the DGX. But again, numbers don’t tell the whole story—speaker placement and design are key here.

What makes the P-125 unique is its four-speaker stereo sound system. Instead of just pushing sound upward like many digital pianos, it splits the audio: two speakers project upward, and two project downward. This helps simulate the natural dispersion of sound from an acoustic piano, where vibrations come not just from the strings but also resonate through the soundboard and into the floor.

The result is a more immersive soundstage than you’d expect from such a slim, portable instrument. The low end is punchy, midrange tones are clean, and the highs sparkle without harshness. It’s not quite as wide or detailed as the DGX-670’s output, but it’s impressively full for a unit this compact.

The speaker system also works well on flat surfaces like desks or tables. In fact, Yamaha designed the P-125 with Table EQ Mode, which automatically adjusts the sound output to reduce low-end muddiness when placed on a hard surface. This feature helps avoid the boxy or boomy tone that plagues many portable keyboards when they’re not on proper stands.

At louder volumes, the P-125 holds up well. It doesn’t distort easily, though the bass starts to lose some clarity when pushed to the max. In small to medium-sized rooms, it’s plenty loud for solo playing or informal gigs like house concerts, cafe sets, or church rehearsals.

Verdict for P-125:

• Clean, full sound with excellent stereo separation
• Clever speaker layout enhances realism
• Table EQ Mode adds versatility for casual setups
• Great for small room practice or lightweight performance
• Slightly less spatial realism than DGX-670

Headphones & External Output

Both pianos include headphone jacks, and both support stereo output. The DGX-670 goes a step further with its Stereo Optimizer, which improves the headphone playing experience by replicating natural speaker placement. This makes long practice sessions more comfortable and less fatiguing.

The P-125 doesn’t have a built-in headphone enhancer like Stereo Optimizer, but it still sounds excellent through a decent pair of headphones. You get detailed tone, solid imaging, and no hiss or background noise.

As for external sound systems:

• Both pianos can connect to powered speakers or PA systems using the headphone jack or USB audio (DGX only).
• The DGX-670 supports USB audio output, meaning you can connect it directly to your DAW or audio interface without extra gear — a big plus for recording or livestreaming.
• The P-125 lacks USB audio, so recording clean sound from it requires a headphone-to-interface cable or external mic setup.

Final Thoughts: Which Has Better Sound Output?

• The DGX-670 wins on immersive sound and stereo imaging. Its intelligent DSP, larger cabinet, and VRM-enhanced piano tone create a deeper, more expressive sound, especially through speakers.
• The P-125 wins on compact clarity and smart projection. Its four-speaker layout punches above its weight and sounds better than many other keyboards in its size class.

If you want realism, presence, and refined dynamics in your playing environment, the DGX-670 takes it. But if you need something compact that still delivers solid, inspiring sound without external gear, the P-125 gets high marks.

Features & Functions

While sound and keyboard feel are the core of any digital piano, features and functions can make the difference between a simple practice instrument and a powerful creative tool. This is where the Yamaha DGX-670 and Yamaha P-125 really diverge in philosophy.

Think of the DGX-670 as a “Swiss Army knife” for musicians — it packs in tools for arrangers, singers, hobbyists, and even content creators. The P-125, meanwhile, is the “no distractions” option — streamlined, intuitive, and focused entirely on playing the piano.

Both approaches have their advantages. Let’s explore what each one brings to the table in real-world terms.

Yamaha DGX-670: A Full-Featured Arranger Workstation

The DGX-670 sits at the intersection between digital piano and arranger keyboard. If you’re not familiar with arranger keyboards, they’re designed to let you perform with interactive backing tracks that follow your chord progressions in real-time — basically, a virtual band at your command.

Here’s a breakdown of what the DGX-670 offers:

✅ 630 Voices & Super Articulation

We’ve already touched on its massive library of instrument voices — but the Super Articulation Voices deserve extra mention here. These voices add human-like realism to instruments like guitars, violins, or saxophones.

For example, a Super Articulation nylon guitar voice will automatically add slides, harmonics, or body taps depending on how you play. These aren’t gimmicks — they really improve the musicality and realism when performing or recording.

✅ 263 Accompaniment Styles

This is where the DGX transforms from a piano into a full backing band. You choose a style — say, bossa nova, funk, swing jazz, EDM, or cinematic strings — and start playing chords in the left hand. The DGX automatically adds drums, bass, rhythm guitar, synths, strings, or whatever else fits the genre.

The accompaniments follow your harmonic structure and adjust dynamically. You can trigger fills, intros, endings, and variations using dedicated buttons. If you’ve ever wanted to perform solo but sound like a full group, this is exactly how you do it.

✅ Smart Chord Function

Not a chord wizard yet? No problem. The Smart Chord function lets you trigger full chords with a single finger — just press one note, and the DGX figures out the harmony based on your selected key. Great for beginners, casual players, or songwriting without needing deep theory knowledge.

✅ Mic Input with Vocal Effects

This is a standout feature. The DGX-670 includes a microphone input (1/4″), complete with built-in vocal effects like reverb, compression, EQ, and even harmony generation (when used with accompaniment). You can plug in a dynamic mic and sing along with your playing, making it perfect for:

• Live vocal/piano duos
• Karaoke and singalongs
• Content creation and livestreams
• Practice sessions with vocal monitoring

There’s even lyrics display support for MIDI karaoke files — so you can literally have a karaoke night with just your DGX and a mic.

✅ Audio & MIDI Recording

The DGX-670 offers multi-track MIDI recording and USB audio recording. You can record yourself playing — with or without accompaniment — and export it as a WAV file directly to a USB drive. This makes it easy to:

• Share performances
• Upload recordings
• Use your audio in a DAW
• Review your progress

No need for external audio interfaces — it’s all built in. For home producers or teachers, this is an incredibly useful tool.

✅ On-Screen Score Display

Another great bonus is the ability to display sheet music on the built-in 7” color LCD screen. If you load a MIDI file, the DGX will auto-generate standard music notation and show it as you play. You can even see the notes you’re pressing in real-time.

It’s not a replacement for sheet music apps like forScore, but it’s helpful for learning or practicing new pieces.

✅ USB Audio/MIDI Interface

With the DGX-670, USB does more than transmit MIDI. It also functions as a USB audio interface, meaning you can record the sound directly into your DAW without needing a separate audio box. This is a huge plus for anyone making music on a computer.

Yamaha P-125: Streamlined, Piano-First Features

The P-125 intentionally skips most of the arranger functions and extras. This is a digital piano that keeps the focus on one thing: playing.

That said, it still has a few useful features baked in.

✅ 24 Voices with Layer & Split Modes

You get 24 carefully curated voices, including:

• 4 acoustic pianos
• 4 electric pianos
• Strings, pads, bass, organs, vibraphone

You can layer two sounds (e.g., piano + strings), or split the keyboard to play bass with your left hand and piano with your right. These features are quick to activate and make live playing more dynamic.

✅ Built-in Rhythms

The P-125 includes 20 rhythm patterns — simple drum grooves in different styles like pop, rock, jazz, and Latin. They’re not full arranger accompaniments like on the DGX, but they add rhythmic energy and are great for:

• Practicing timing
• Jamming
• Adding groove to simple arrangements

There’s no bass or chord tracking, just a rhythm section — which is exactly what many players want. Simple, flexible, and out of the way when you don’t need it.

✅ Recording (1 Song)

The P-125 allows you to record one MIDI performance and play it back. It’s not multi-track, and you can’t export audio without extra gear — but for reviewing practice, it does the job. You can overwrite and re-record as needed.

If you want more advanced recording options, Yamaha’s Smart Pianist app opens a few extra doors (more on that in a second).

✅ Smart Pianist App Integration

Here’s where Yamaha cleverly adds power without complicating the piano’s interface. By connecting your phone or tablet via USB, you can unlock more features through the Smart Pianist app, including:

• Voice selection with visual previews
• Graphic EQ and reverb control
• Chord chart display from audio tracks
• Playback of your favorite songs
• Simplified recording and practice tools

The app gives you touchscreen control and streamlines functions that would otherwise require a screen and menu system.

Comparison: Power vs Simplicity

The key difference in features boils down to intent.

• The DGX-670 is built for players who want more than piano. If you’re arranging, singing, performing, or composing across genres, this instrument gives you a ton of creative options.
• The P-125 is for piano-first players. It offers the core tools to play, practice, and improve — nothing more, nothing less.

Here’s a quick comparison:

Feature	Yamaha DGX-670	Yamaha P-125
Total Voices	630	24
Accompaniment Styles	263	20 basic drum rhythms
Super Articulation Voices	Yes	No
Mic Input	Yes (with vocal effects)	No
Audio Recording	Yes (WAV to USB)	No (MIDI only)
Multi-Track Recording	Yes	No
Lyrics & Score Display	Yes (LCD screen)	No
Smart Chord	Yes	No
USB Audio Interface	Yes	No
Smart Pianist App Support	No (not supported)	Yes (adds visual control, EQ)

Final Thoughts on Features

If your ideal piano is one that does everything, from songwriting to solo gigging to karaoke nights with friends, the DGX-670 is unbeatable at this price. It gives you a creative playground and the tools to bring full songs to life, whether you’re playing or singing.

If, on the other hand, you want something that just works — no learning curve, no extra complexity — and focuses entirely on helping you play piano well, the P-125 is refreshingly distraction-free.

Connectivity

In 2025, digital pianos are more than just instruments — they’re hubs. Whether you’re recording, teaching, performing, or using learning apps, connectivity is what makes your digital piano truly modern. It determines how easily you can integrate it into your workflow, whether that’s in a bedroom studio, a classroom, or on stage.

The Yamaha DGX-670 and P-125 have very different philosophies here. The DGX is more of a digital music center with broader I/O (input/output) capabilities. The P-125, by contrast, keeps things streamlined but still offers enough for casual and even semi-serious users.

Let’s break it all down by connection type and real-world use.

1. USB Connectivity

✅ DGX-670: USB to Host + USB to Device (Full Audio/MIDI Interface)

The DGX-670 comes with two USB ports:

• USB to Host — for connecting the DGX to your computer or tablet. This port handles both MIDI and audio data, which is a major advantage.
• USB to Device — for plugging in a USB flash drive. This is used to save and load songs, audio recordings, styles, and settings.

What’s impressive is that the USB to Host port functions as a true USB audio interface. That means you can record stereo audio directly from the DGX to your computer, tablet, or smartphone without needing any extra gear.

If you’re a:

• YouTuber making piano videos
• Producer recording into a DAW
• Teacher sending students audio examples
• Music student submitting performance assignments

This feature is a game-changer. It removes the need for an external audio interface, simplifies your setup, and ensures crystal-clear digital sound in your recordings.

You can also play audio from your computer through the DGX’s speakers — useful for practicing along with backing tracks or tutorials.

✅ P-125: USB to Host Only (MIDI Only)

The P-125 has a USB to Host port as well, but here’s the catch: it’s MIDI-only. It does not transmit audio.

So while you can use the P-125 to control virtual instruments, interact with apps like Smart Pianist, or record MIDI in your DAW, you’ll need additional gear (like an audio interface + mic, or line-out to interface) to capture high-quality audio.

That’s a key limitation if you plan to record your piano performances often, especially for video or music production.

2. Bluetooth

✅ DGX-670: Bluetooth Audio In (But No MIDI)

The DGX-670 supports Bluetooth audio streaming, meaning you can wirelessly play music from your phone, tablet, or laptop through its speakers.

Use cases include:

• Playing along with your favorite songs on Spotify or YouTube
• Jamming over backing tracks
• Using the DGX as a home speaker system when not playing

However, it’s worth noting that the DGX-670 does not support Bluetooth MIDI. So you can’t use it to wirelessly control iOS music apps or DAWs. For that, you’ll still need a USB connection.

Still, Bluetooth audio is a convenient quality-of-life feature — especially for casual practice or teaching environments.

❌ P-125: No Bluetooth at All

The P-125 does not include Bluetooth of any kind — not for MIDI, not for audio.

If you want to stream music to the speakers or use wireless MIDI, you’ll need a third-party Bluetooth MIDI adapter (like Yamaha’s UD-BT01 or other USB MIDI dongles), which adds cost and setup complexity.

For players who are tech-savvy or use tablets heavily, this is a noticeable shortfall in the P-125’s connectivity.

3. Audio Outputs & Line Connections

✅ DGX-670: Headphone Out + Aux In

The DGX includes:

• 1/4″ stereo headphone output (can double as line out)
• 1/8″ Aux In jack

The headphone out can be used to connect to:

• Headphones
• PA systems
• External monitors or speakers
• Recording devices

Since there’s no dedicated “Line Out” jack, this is your primary output source. It works fine and offers clean stereo audio, though dedicated outputs would have been a bonus at this level.

The Aux In lets you connect any external audio device — phone, tablet, synth — and play its sound through the DGX’s speakers. Super handy for jamming or layering sounds.

✅ P-125: Dual Headphone Outs (Double as Stereo Line Out)

The P-125 offers two 1/4″ stereo headphone outputs — a rare convenience. You can:

• Plug in two pairs of headphones for teaching or duets
• Or use one as a line out to connect to speakers, interfaces, or mixers

There’s no Aux In on the P-125, so you can’t route external sound through the built-in speakers like you can with the DGX.

That said, for such a compact instrument, having dual headphone/line outs is a nice touch. And they deliver clean, balanced audio for most common setups.

4. Pedal Inputs

✅ DGX-670: Single Pedal + Triple Pedal Support

The DGX includes a standard sustain pedal input and also supports Yamaha’s LP-1 three-pedal unit when used with the L-300 stand. This gives you:

• Sustain (damper)
• Soft (una corda)
• Sostenuto

This setup mimics the full pedal range of an acoustic grand and is great for classical players or advanced students.

✅ P-125: Same Triple Pedal Support

Same story here. The P-125 includes a sustain pedal input, but can also be upgraded to full pedal functionality with the LP-1. However, this only works when you use it with Yamaha’s L-125 matching stand.

So for either piano, you can scale your pedal setup from minimal to full depending on how you use it.

5. App & Smart Device Integration

❌ DGX-670: No Smart Pianist App Support

Surprisingly, the DGX-670 does not support Yamaha’s Smart Pianist app, even though it’s the more advanced model. That’s likely because it already has a 7″ screen and full menu control on the instrument itself, making the app somewhat redundant.

However, this means no mobile app integration for touch-based control — something to keep in mind if you prefer managing settings from your phone or tablet.

✅ P-125: Full Smart Pianist App Compatibility

The P-125 works seamlessly with Smart Pianist via USB connection to iOS or Android devices. With the app, you can:

• Change voices and settings with a touchscreen interface
• Use a graphic EQ to fine-tune your tone
• View chord progressions and notation from audio files
• Control rhythms, metronome, and more

For tech-savvy users or learners, this adds a lot of power to a piano that otherwise has a minimalist design.

Final Verdict: Who Wins on Connectivity?

Feature	Yamaha DGX-670	Yamaha P-125
USB MIDI	Yes	Yes
USB Audio	✅ (2-way audio interface)	❌ (MIDI only)
USB to Device	✅ (for recording to flash drive)	❌
Bluetooth Audio	✅ (stream music)	❌
Bluetooth MIDI	❌	❌
Aux In	✅	❌
Headphone Out	✅ (1x stereo)	✅ (2x stereo)
Line Out	Shared with headphone jack	Shared with headphone jack
Mic Input	✅ (with vocal effects)	❌
Smart Pianist App	❌	✅
Triple Pedal Support	✅ (with stand + LP-1)	✅ (with stand + LP-1)

Best for creators, performers, and producers? → DGX-670
Best for students, casual players, and app users? → P-125

In short: if you want deep integration with computers, USB audio recording, a mic input, and Bluetooth convenience — the DGX-670 is far more connected and studio-ready. But if you just need essential MIDI, headphone outs, and smart app control, the P-125 gets the job done simply and efficiently.

Value for Money

At the end of the day, your choice might come down to budget — not just how much you’re willing to spend, but what kind of experience you’re hoping to get for that money. When you line up the Yamaha DGX-670 and P-125, there’s a clear price gap — but the value of each depends entirely on what you need from a digital piano.

Let’s talk dollars, features, and real-world value.

Yamaha P-125: Streamlined Value for Piano-Centric Players

As of now, the Yamaha P-125 typically sells in the range of $650 to $700 USD for the base model. That includes:

• The 88-key fully weighted keyboard
• 24 high-quality voices
• Built-in four-speaker system
• USB MIDI connectivity
• Access to the Smart Pianist app
• Layering, split mode, and 20 rhythm patterns
• Basic recording functionality
• One sustain pedal (included)

What you’re not getting: a large color screen, accompaniment styles, mic input, audio recording, or a massive sound library. But the absence of those extras is actually part of the value proposition — the P-125 is focused on delivering an excellent piano-playing experience in a simple, compact, and affordable package.

If you’re a beginner, hobbyist, or even an intermediate player who just wants a great feel, solid piano sound, and a portable design, the P-125 is a home run. It nails the fundamentals without making you pay for features you’ll never use.

Best value for:

• Students
• Piano-focused musicians
• Teachers
• Gigging musicians who want something lightweight
• Budget-conscious buyers who still want Yamaha quality

Yamaha DGX-670: Premium Features, Premium Price

The DGX-670, on the other hand, starts around $850–$950 USD depending on the seller. That’s for the keyboard alone. If you want the full setup — including Yamaha’s L-300 furniture stand and LP-1 triple pedal unit — expect to spend about $1,050–$1,100 USD total.

That’s a noticeable jump in price compared to the P-125, but here’s what you’re getting in return:

• 630 voices and 263 accompaniment styles
• Super Articulation instrument voices
• Full arranger functionality (auto-chord backing, intros, fills, etc.)
• Mic input with built-in vocal effects
• USB audio interface (record and playback)
• Multi-track MIDI recorder
• Color LCD screen with score and lyric display
• Bluetooth audio input
• USB-to-device for flash drive storage
• Virtual Resonance Modeling for enhanced piano realism

On paper, that’s a lot more than the P-125. And in practice? It is.

The DGX-670 is more than a piano — it’s a complete music creation and performance platform. It’s like having a digital piano, arranger keyboard, USB audio interface, and vocal processor all in one. If you’ll use even half of those features, it absolutely justifies its higher price.

But here’s the key: if you’re not going to use the arranger styles, mic input, or Super Articulation voices, you’re spending a few hundred dollars more for features that’ll sit idle. That’s where value becomes subjective.

Best value for:

• Singer-songwriters
• Composers and arrangers
• Hobbyists who want variety and creative tools
• Performers looking for a versatile solo instrument
• Intermediate-to-advanced users ready to go beyond “just piano”

Which One Is the Better Deal?

Let’s keep it real: the P-125 is the better deal if you just want a quality digital piano without the fluff. You save money, get Yamaha’s excellent piano tone and action, and still have enough features to grow musically.

But if your creative interests go beyond the basics — if you’re into arranging, singing, recording, experimenting, or just want more sonic depth — the DGX-670 offers enormous value for what it packs in.

It all comes down to this question: Do you want a focused piano, or a multi-tool instrument?

• Focused piano = P-125
• Do-it-all powerhouse = DGX-670

Both are priced fairly. Neither is overpriced for what it offers. The value comes down to your needs.

Use Case & Who It’s For

Yamaha DGX-670 is for you if:

• You want to explore arranging, backing tracks, and full band styles.
• You’re a singer and want to use a mic with vocal effects.
• You want to compose and experiment with different sounds.
• You’re okay with a heavier, less portable setup.

Yamaha P-125 is for you if:

• You just want a great piano playing experience.
• You need something lightweight and easy to move.
• You’re focused on learning and improving your piano skills.
• You don’t care about extra instrument sounds or arranger features.

Final Verdict

After spending time with both the Yamaha DGX-670 and P-125, the conclusion is clear: these are two very different instruments built for different types of players. One isn’t “better” than the other — they just serve different goals.

If you’re someone who wants a straightforward, reliable, great-sounding digital piano with realistic key action and no unnecessary extras, the Yamaha P-125 is the smarter, cleaner choice. It’s light, portable, affordable, and focused. It gives you a solid foundation to learn, practice, or perform piano music with minimal distractions. The value is unbeatable if all you care about is how the instrument plays and sounds.

On the other hand, if you want a creative playground — a workstation that lets you experiment with different instruments, jam with full band accompaniments, plug in a microphone, or even produce your own tracks — then the Yamaha DGX-670 is absolutely worth the investment. It’s not just a piano. It’s a versatile music hub with arranger features, vocal support, USB audio recording, and a sound palette wide enough for virtually any genre.

So ask yourself this:

• Do you want to just play piano well? → Go with the P-125
• Do you want to create, perform, and produce more than just piano music? → Go with the DGX-670

Both are excellent instruments in their own right — but which one is right for you depends on your musical goals.

If you’re still unsure, here’s one last way to look at it:

P-125 = Piano-first.
DGX-670 = Music-first.

Choose the one that matches your purpose, and you can’t go wrong.