If you’re in the market for a digital piano with plenty of features, realistic key action, and great sound, you’ve probably come across the Yamaha DGX-670 and the Casio PX-S3100. Both of these models offer excellent value for their price and cater to a wide range of players, from beginners to experienced musicians looking for a solid digital piano.
But which one is the better choice for you? That depends on your priorities. Do you want a digital piano with a realistic feel? Do you need a variety of features like auto-accompaniment and built-in effects? Or are you looking for something compact and portable?
In this detailed comparison, we’ll analyze the Yamaha DGX-670 and Casio PX-S3100 in terms of design, keyboard action, sound quality, speakers, features, connectivity, and value for money. By the end of this review, you’ll have a clear understanding of which piano suits your needs best.
Let’s dive in!
Yamaha DGX-670 vs Casio PX-S3100 Comparison Chart
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| Specification | Yamaha DGX-670 | Casio PX-S3100 |
|---|---|---|
 |  | |
| Check the best price on Amazon | Check the best price on Amazon | |
| Type | Digital Piano | Digital Piano |
| Keyboard Type | 88 keys Graded Hammer Standard (GHS) | 88 keys Smart Scaled Hammer Action |
| Key Action | Weighted, heavier feel (suitable for classical) | Lighter, responsive action (great for modern styles) |
| Key Surface | Smooth plastic | Textured (ebony/ivory feel) |
| Sound Engine | Pure CF Sound Engine with CFX Grand Piano sample | AiR Sound Source (with multi-layered sounds) |
| Polyphony | 256 notes | 192 notes |
| Number of Voices | 630 built-in voices | 700 built-in tones |
| Rhythm/Accompaniment | 263 styles (Full accompaniment options) | 200 rhythms (simpler accompaniment styles) |
| Effects | Reverb, Chorus, EQ, and more | Reverb, DSP effects, Brilliance, etc. |
| Speakers | 12W + 12W (2 x 6W speakers) | 8W + 8W (2 x 4W speakers) |
| Connectivity | USB to Host, USB to Device, Aux input, Mic input | Bluetooth MIDI & Bluetooth Audio, USB to Host |
| MIDI Capability | USB MIDI | USB MIDI |
| Display | 6.1” LCD screen for navigation and settings | Slim, compact screen for basic settings |
| Metronome | Yes, adjustable tempo & time signatures | Yes, adjustable tempo & time signatures |
| Learning Features | Smart Pianist app support, built-in lesson features | No dedicated app, but has built-in practice features |
| Recording | 16-track MIDI recording, USB audio recording | 1-track MIDI recording |
| Power Supply | AC Adapter (Power supply included) | AC Adapter, Battery powered (6 x AA) |
| Weight | 47 lbs (21.4 kg) | 25.1 lbs (11.4 kg) |
| Dimensions (W x D x H) | 53.5″ x 17.6″ x 6.6″ | 52.4″ x 11.7″ x 4.4″ |
| Additional Features | Mic input with vocal effects, Song Mode | Bluetooth Audio streaming, Battery operation |
| My individual reviews | Yamaha DGX-670 review | Casio PX-S3100 review |
Key Differences at a Glance:
- Sound Quality: The Yamaha DGX-670 boasts a superior CFX Grand Piano sound engine with a higher polyphony count, making it better for nuanced performances.
- Portability: The Casio PX-S3100 is significantly lighter and more compact, making it a more portable option for musicians on the go.
- Connectivity: The Casio PX-S3100 features Bluetooth MIDI and audio streaming, which makes it ideal for wireless use with mobile apps and devices. The Yamaha DGX-670 lacks Bluetooth but offers USB audio recording.
- Speakers: The Yamaha DGX-670 has more powerful speakers, making it better for self-contained performances, while the Casio PX-S3100 is better suited for portable use with external amplification.
- Learning Features: The Yamaha DGX-670 has more advanced learning tools via its Smart Pianist app, while the Casio PX-S3100 offers basic practice tools without the same level of integration.
Both pianos offer great features for different needs, so the decision depends on whether you prioritize portability and modern features (Casio) or sound realism and advanced learning tools (Yamaha).
Design & Build Quality
When buying a digital piano, design and build quality matter more than most people realize. Your instrument’s size, weight, material quality, and interface all contribute to your overall experience. Some players need a sturdy, workstation-like piano with a professional presence, while others prioritize portability and minimalism.
The Yamaha DGX-670 and the Casio PX-S3100 represent two very different design philosophies. One is a feature-packed, workstation-style instrument, while the other is the slimmest digital piano on the market. Let’s take a deep dive into how they compare in terms of dimensions, weight, materials, and user interface.
Size & Portability
Yamaha DGX-670: A Full-Sized, Workstation Approach
The Yamaha DGX-670 is larger and bulkier, measuring approximately:
- Width: 55 inches (139.7 cm)
- Depth: 17.5 inches (44.4 cm)
- Height: 5.7 inches (14.7 cm)
- Weight: 47 lbs (21.4 kg)
This is not a lightweight piano by any means. It’s heavier than most slab-style digital pianos, including the Casio PX-S3100. The reason for this bulkiness comes down to its design and extra features.
The control panel, large LCD screen, built-in speaker system, and auto-accompaniment features make the DGX-670 resemble an arranger keyboard or small workstation rather than a traditional digital piano.
While you can move it around, it’s not designed for frequent transportation. If you’re looking for a piano that you can easily carry to gigs or move between rooms, this might not be the best option. However, if you’re setting it up in a dedicated home studio or practice space, its solid construction and integrated stand compatibility make it a great choice.
Casio PX-S3100: The Slimmest 88-Key Digital Piano
The Casio PX-S3100 takes an entirely different approach. This model is built for maximum portability and sleek aesthetics, with dimensions of:
- Width: 52 inches (132.2 cm)
- Depth: 9.1 inches (23.2 cm)
- Height: 4 inches (10.2 cm)
- Weight: 25.1 lbs (11.4 kg)
That’s almost half the weight of the DGX-670 and significantly slimmer. In fact, Casio markets the PX-S3100 as the slimmest 88-key digital piano ever made.
The compact size makes it perfect for small apartments, dorm rooms, and travel musicians who need a full-sized keyboard without the bulk. You can easily carry it under one arm and set it up anywhere.
Additionally, the PX-S3100 can be powered by batteries (6 AA batteries), making it completely portable—a feature the DGX-670 lacks. This is a huge plus for musicians who perform in outdoor settings, street performances, or venues without easy access to power outlets.
Build Quality & Materials
Yamaha DGX-670: Robust & Durable
The DGX-670 has a solid plastic casing, reinforced with a sturdy metal chassis that gives it a strong, durable feel. The control panel is well-structured, with physical buttons, knobs, and a large LCD screen for navigation.
Yamaha pianos are known for their long-lasting durability, and the DGX-670 is no exception. Whether you’re using it at home or in a studio environment, it feels sturdy and reliable.
However, its bulkiness can also be a downside. Unlike slab-style digital pianos, the wider body and larger depth mean you’ll need a bigger stand or furniture space to accommodate it.
Casio PX-S3100: Sleek & Modern, but Lighter
The PX-S3100 features a minimalist, futuristic design with a glossy black finish. Unlike Yamaha’s traditional look, Casio opted for a touch-based interface instead of physical buttons. While this contributes to its sleek, modern appearance, it also means:
- No tactile feedback – Some players prefer physical buttons and knobs for quick adjustments rather than a touchscreen.
- Fingerprint magnet – The glossy surface tends to attract smudges easily, which means you’ll need to clean it frequently.
While the PX-S3100’s plastic casing feels solid, it’s not as rugged as the DGX-670. The lighter weight makes it easier to transport, but it also means it’s less stable when placed on a stand. If you play energetically or use a heavy touch, you might notice a slight wobble, especially if it’s not on a stable surface.
User Interface & Controls
Yamaha DGX-670: Physical Buttons & LCD Screen
One of the biggest advantages of the DGX-670 is its user-friendly interface. Unlike the PX-S3100’s touch-based design, the DGX-670 features:
- A large, full-color LCD screen
- Physical buttons and knobs for quick access
- A dedicated volume knob
The LCD screen is particularly useful for navigating voices, settings, and auto-accompaniment options. If you’re used to traditional keyboards and prefer a hands-on control experience, the DGX-670’s interface is intuitive and straightforward.
Casio PX-S3100: Modern Touch-Based Interface
Casio’s PX-S3100 goes in the opposite direction, opting for a touch-sensitive control panel instead of physical buttons.
Pros of this design:
✔ Looks sleek and modern
✔ Allows for a cleaner layout without clutter
Cons of this design:
❌ No tactile feedback – You have to visually confirm changes instead of feeling them.
❌ Can be tricky in low-light settings – Since it relies on a glossy, illuminated panel, adjustments in dim lighting may require extra effort.
Some users might find the touch interface elegant and intuitive, while others may miss the tactile control of Yamaha’s traditional buttons. It ultimately comes down to personal preference.
Accessories & Extras
Yamaha DGX-670:
- Comes with a music rest
- Compatible with Yamaha’s L-300 stand (sold separately)
- Comes with a sustain pedal (basic, but functional)
Casio PX-S3100:
- Does NOT come with a stand (must be purchased separately)
- Can be used with Casio’s SP-34 pedal unit (for half-damper control)
- Comes with a sustain pedal (but also basic)
One advantage of the PX-S3100 is that it has battery power support, making it more flexible for on-the-go musicians.
Final Verdict: Which Has Better Design & Build Quality?
| Feature | Yamaha DGX-670 | Casio PX-S3100 |
|---|---|---|
| Portability | ❌ Heavy & bulky | ✅ Ultra-lightweight |
| Durability | ✅ Very solid | ⚠️ Good, but less rugged |
| User Interface | ✅ Buttons & LCD | ⚠️ Touch-based (no buttons) |
| Stand Compatibility | ✅ Integrated music rest | ❌ No built-in stand |
| Power Options | ❌ Plug-in only | ✅ Battery-powered option |
Choose the Yamaha DGX-670 if:
✅ You prefer stability and durability
✅ You like physical buttons & an LCD screen
✅ You want a built-in music rest and solid build
Choose the Casio PX-S3100 if:
✅ You need a lightweight, portable design
✅ You want a sleek, modern look
✅ You prefer battery-powered operation
Ultimately, both models are well-designed, but Yamaha’s is sturdier, and Casio’s is more portable. The best choice depends on your needs!
Keyboard & Action
The keyboard action is one of the most critical aspects of a digital piano. It determines how realistic the piano feels, how responsive it is to your playing dynamics, and ultimately, how enjoyable it is to play. Both the Yamaha DGX-670 and Casio PX-S3100 feature fully weighted 88-key keyboards, but their key actions are quite different.
To help you make an informed decision, let’s analyze:
- Key weight and feel
- Key surface texture
- Realism of hammer action
- Expressiveness and dynamic range
- Suitability for different types of players
Key Action Mechanisms: Yamaha GHS vs. Casio Smart Scaled Hammer Action
Yamaha DGX-670: Graded Hammer Standard (GHS) Action
Yamaha equips the DGX-670 with its Graded Hammer Standard (GHS) action, which has been a staple in Yamaha’s mid-range digital pianos for years.
✔ Graded Action: The keys feel heavier in the lower register and lighter in the higher register, just like an acoustic piano. This helps build proper finger strength and technique for transitioning to a real grand piano.
✔ Good Weighting for a Semi-Portable Piano: The GHS action is on the heavier side, making it a good choice for players who want an authentic piano-like resistance.
⚠ Downsides of GHS Action:
- No Escapement Mechanism: Unlike Yamaha’s more advanced GH3 or NWX actions, the GHS action does not replicate the slight “notch” feeling of a grand piano’s escapement mechanism.
- Plastic Key Surfaces: The keys have a glossy plastic finish, which can feel a bit slippery for some players, especially during long practice sessions.
- Somewhat Noisy: While not a dealbreaker, the GHS action is slightly noisier than Casio’s Smart Scaled Hammer Action. If you play quietly at night, you might notice some key thudding.
Casio PX-S3100: Smart Scaled Hammer Action
Casio takes a different approach with its Smart Scaled Hammer Action (SSHA), which is an evolution of the standard Scaled Hammer Action found in previous Privia models.
✔ Individually Scaled Keys: Unlike Yamaha’s GHS, which applies the same weight scaling across groups of keys, Casio’s Smart Scaled Hammer Action adjusts the weight of each key individually. This makes the transition between registers smoother.
✔ Textured Key Surfaces: The PX-S3100 has textured key surfaces that mimic the feel of ebony and ivory, which helps with grip and prevents fingers from slipping. This is a big advantage over Yamaha’s glossy plastic keys.
✔ Quieter Key Action: The PX-S3100’s key action is quieter than the DGX-670’s GHS action, making it a better option for silent practice with headphones.
⚠ Downsides of Casio’s Smart Scaled Hammer Action:
- Lighter Key Weight: Some pianists may find Casio’s action a bit too light, especially those accustomed to acoustic or Yamaha pianos.
- Less Physical Resistance: The PX-S3100’s lighter key resistance may not be ideal for players who want deep, weighted key presses for expressive dynamics.
Key Surface & Touch Feel
Key surface texture plays a major role in playability and how comfortable the keys feel over extended sessions.
Yamaha DGX-670:
- The keys are made of glossy plastic, which is smooth and slightly slippery.
- While the action itself is solid, some players may miss the textured feel of real ivory and ebony.
- Players with sweaty hands may find the glossy finish less comfortable for extended practice sessions.
Casio PX-S3100:
- The PX-S3100 features textured key surfaces, designed to replicate real ebony and ivory.
- The subtle texture improves grip and prevents slipping, making it more comfortable for longer playing sessions.
- The feel of the keys is closer to premium models, despite the PX-S3100 being a lightweight and compact instrument.
✔ Winner: Casio PX-S3100 – The textured ebony/ivory-like surface provides a more realistic feel than Yamaha’s smooth plastic keys.
Realism & Expressiveness
A good digital piano should provide dynamic control and expressive response, allowing you to play softly or loudly with natural variation.
Yamaha DGX-670: Good for Weighted Piano Feel
- The GHS action offers better resistance for traditional piano players, allowing for precise control over dynamics.
- If you play classical music or jazz, you might prefer Yamaha’s heavier key action, as it gives you a more realistic experience closer to an acoustic piano.
- However, the lack of escapement means fast repetitions may feel sluggish compared to an acoustic piano or higher-end Yamaha models like the P-515.
Casio PX-S3100: Better for Speed & Modern Styles
- The lighter action allows for faster key repetition, which is useful for pop, electronic music, and synth-based styles.
- Casio’s Smart Scaled Hammer Action is more forgiving for beginners and intermediate players who don’t want an ultra-heavy feel.
- However, classical pianists might find it a bit too light.
✔ Winner: Yamaha DGX-670 for Classical & Jazz
✔ Winner: Casio PX-S3100 for Pop & Modern Genres
Suitability for Different Types of Players
| Player Type | Yamaha DGX-670 | Casio PX-S3100 |
|---|---|---|
| Beginners | ✅ Great for learning proper technique | ✅ Lighter action is easier for beginners |
| Classical Pianists | ✅ Weighted keys feel closer to an acoustic piano | ❌ Lighter action may feel unrealistic |
| Jazz Musicians | ✅ Heavier keys allow for expressive playing | ⚠ Good, but slightly light for jazz dynamics |
| Pop & Synth Players | ⚠ Heavier keys may feel slow for fast passages | ✅ Lighter keys allow for quick playing |
| Gigging Musicians | ❌ Heavy and less portable | ✅ Light and easy to carry |
| Silent Practice Users | ⚠ GHS action can be noisy | ✅ Quieter key action |
✔ Pick the Yamaha DGX-670 if:
- You want a realistic acoustic piano feel
- You play classical or jazz and need weighted action
- You’re focused on building finger strength and technique
✔ Pick the Casio PX-S3100 if:
- You need a faster key response for pop, synth, or electronic music
- You prefer lighter key action for easier playability
- You want a quieter keyboard for silent practice
Final Verdict: Which Has the Better Keyboard Action?
| Feature | Yamaha DGX-670 | Casio PX-S3100 |
|---|---|---|
| Key Action Type | Graded Hammer Standard (GHS) | Smart Scaled Hammer Action |
| Weight Feel | Heavier, more realistic | Lighter, better for fast playing |
| Key Surface | Smooth plastic | Textured ebony/ivory feel |
| Dynamic Range | Great for expressiveness | Good, but slightly limited by lighter keys |
| Quietness | Slightly noisy | Quieter than Yamaha |
✔ Winner for Realistic Piano Feel: Yamaha DGX-670
✔ Winner for Portability & Fast Playability: Casio PX-S3100
Both are great digital pianos, but your choice depends on your playing style. If you prioritize a true piano feel, go with the Yamaha DGX-670. If you prefer a faster, more portable option, the Casio PX-S3100 is better.
Sound Quality & Tone Generation
When choosing a digital piano, sound quality is one of the most critical factors. A piano that feels great but sounds subpar will not provide an enjoyable playing experience. The Yamaha DGX-670 and Casio PX-S3100 both come equipped with high-quality sound engines, but they have different approaches when it comes to tone generation, sound realism, and customization options.
In this section, we’ll compare:
- Sound engines (sampling technology and synthesis methods)
- Piano tones (quality and realism of acoustic piano sounds)
- Other instrument voices (electric pianos, strings, synths, etc.)
- Polyphony count (how many notes can be played simultaneously)
- Sound customization & effects
- Suitability for different playing styles
Sound Engine Comparison
At the core of every digital piano is its sound engine, the technology that generates the instrument’s tones. Let’s look at how Yamaha and Casio approach this.
Yamaha DGX-670: Pure CFX Sampling with Virtual Resonance Modeling (VRM Lite)
Yamaha’s DGX-670 is powered by its Pure CFX Sound Engine, featuring a high-quality sample of Yamaha’s flagship CFX concert grand piano.
✔ Recorded from a Real Yamaha CFX Grand: The CFX is one of the most prestigious grand pianos in the world, and Yamaha has carefully sampled it for use in the DGX-670.
✔ Virtual Resonance Modeling (VRM Lite): This adds realistic resonance and overtones, simulating how sound interacts within an acoustic piano’s body.
✔ Rich, Full-Bodied Tone: Yamaha’s sample is detailed and expressive, making it ideal for classical music, jazz, and expressive playing.
⚠ Downsides:
- The CFX sampling is high-quality, but not as deep as Yamaha’s high-end models (like the Clavinova or P-515).
- Some preset voices (such as organs and synths) feel less refined compared to dedicated synthesizers.
Casio PX-S3100: AiR Sound Source with String Resonance
Casio uses its AiR (Acoustic and Intelligent Resonator) Sound Source, which features a German concert grand piano sample.
✔ German Concert Grand Sample: Casio doesn’t specify the exact model, but it’s likely inspired by a Steinway or Bösendorfer grand piano.
✔ String Resonance & Damper Simulation: The PX-S3100 includes string resonance, damper resonance, and key-off simulation, adding realism to the sound.
✔ Crisp & Clear Tone: Casio’s piano sound has a brighter, more modern character, making it great for pop, rock, and contemporary music.
⚠ Downsides:
- The AiR sound engine doesn’t have VRM-style resonance modeling, so the tone can feel less “alive” compared to Yamaha’s CFX sampling.
- The grand piano tone is great for contemporary styles but lacks some of the depth found in Yamaha’s samples.
Sound Engine Winner: Yamaha DGX-670
✔ The DGX-670’s CFX sampling and VRM Lite technology provide a more detailed, nuanced sound, especially for classical and jazz musicians.
✔ However, the PX-S3100’s bright, modern tone is better suited for pop, rock, and contemporary music.
Acoustic Piano Sound Quality
Yamaha DGX-670 Piano Sound Characteristics
🎵 Tone Quality: Warm, rich, and full-bodied
🎵 Best for: Classical, jazz, film scores, solo piano playing
🎵 Customization: VRM Lite allows for subtle tonal variations
The DGX-670’s CFX tone is very expressive, with deep bass, rich mids, and sparkling highs. The dynamic range is excellent, allowing for delicate pianissimo and powerful fortissimo playing.
Key strengths:
✔ The VRM Lite adds realism, making the piano sound more like a real grand.
✔ The dynamic expression is fantastic for classical pieces.
Casio PX-S3100 Piano Sound Characteristics
🎵 Tone Quality: Bright, crisp, and contemporary
🎵 Best for: Pop, rock, and modern music styles
🎵 Customization: String resonance and damper simulation add realism
The PX-S3100’s German grand tone is clearer and brighter, making it a great choice for modern pop, blues, and gospel styles.
Key strengths:
✔ The crisp attack and bright timbre work well in band settings.
✔ The string resonance simulation enhances realism.
Which Piano Has the Better Acoustic Tone?
✔ Classical & Jazz Musicians: Yamaha DGX-670
✔ Pop & Contemporary Players: Casio PX-S3100
Additional Instrument Voices
Yamaha DGX-670: 630 Total Voices
The DGX-670 is packed with 630 instrument voices, including:
🎸 Electric pianos, organs, strings, brass, synths
🎷 Guitars, basses, and orchestral sounds
🌎 World instruments and drum kits
✔ Best Sound Categories: The electric pianos and orchestral sounds are especially good.
⚠ Weaknesses: Some synthetic sounds feel slightly outdated compared to professional synthesizers.
Casio PX-S3100: 700 Total Voices
The PX-S3100 has a larger variety of sounds (700 voices), including:
🎹 Classic electric pianos and synths
🎺 Jazz brass, orchestral instruments, and drum kits
🔊 Modern electronic sounds (great for pop & EDM)
✔ Best Sound Categories: Casio excels in electric pianos, synths, and drum beats, making it great for modern music production.
⚠ Weaknesses: The acoustic instrument voices (violins, flutes, etc.) aren’t as detailed as Yamaha’s.
Which Has Better Additional Voices?
✔ For variety and modern music: Casio PX-S3100
✔ For realistic acoustic instruments: Yamaha DGX-670
Polyphony: How Many Notes Can Be Played at Once?
Polyphony refers to how many notes a digital piano can play simultaneously. A higher polyphony count prevents notes from cutting off during fast passages or when using the sustain pedal.
| Model | Polyphony Count |
|---|---|
| Yamaha DGX-670 | 256 Notes |
| Casio PX-S3100 | 192 Notes |
✔ Winner: Yamaha DGX-670 – The higher 256-note polyphony ensures smoother, more complex performances.
Sound Customization & Effects
Yamaha DGX-670 Customization Options:
🎛 Reverb, chorus, EQ settings
🎛 VRM Lite for string resonance
🎛 Custom piano adjustments (brightness, tuning, etc.)
Casio PX-S3100 Customization Options:
🎚 DSP effects (chorus, delay, EQ)
🎚 Layering & split modes
🎚 Customizable string resonance and damper settings
✔ Winner: Tie – Both pianos allow sound shaping and customization, but Yamaha’s VRM Lite is better for acoustic realism, while Casio’s DSP effects work well for modern production.
Final Verdict: Which Piano Has Better Sound Quality?
| Feature | Yamaha DGX-670 | Casio PX-S3100 |
|---|---|---|
| Acoustic Piano Sound | ✅ Deep, expressive CFX tone | ⚠ Bright, modern tone |
| Additional Voices | ✅ Better orchestral instruments | ✅ More modern & synth sounds |
| Polyphony | ✅ 256 notes | ❌ 192 notes |
| Customization | ✅ VRM Lite for resonance | ✅ DSP effects for modern music |
✔ Winner for Classical & Jazz: Yamaha DGX-670
✔ Winner for Pop, Rock & Synths: Casio PX-S3100
Both are excellent digital pianos, but your choice depends on your musical style and sound preferences!
Speakers & Amplification
When it comes to digital pianos, built-in speakers play a crucial role in shaping the overall playing experience. A great sound engine is only as good as the speakers that deliver the sound, and differences in speaker power, clarity, and projection can dramatically affect how immersive and enjoyable the instrument feels.
The Yamaha DGX-670 and Casio PX-S3100 take different approaches to their speaker systems. The DGX-670 prioritizes depth and richness, while the PX-S3100 focuses on portability with a clear but compact sound system.
In this section, we’ll analyze:
- Speaker size and placement
- Amplification power and clarity
- Bass response and stereo imaging
- Suitability for different playing environments
Speaker System & Amplification Power
| Model | Amplification (Wattage) | Speaker Size & Type |
|---|---|---|
| Yamaha DGX-670 | 6W + 6W (12W total) | Two 12 cm full-range speakers |
| Casio PX-S3100 | 8W + 8W (16W total) | Two oval full-range speakers |
At first glance, Casio’s PX-S3100 has the advantage in power output, delivering 16W of total amplification compared to the 12W of the Yamaha DGX-670. However, pure wattage isn’t everything—speaker size, placement, and overall sound dispersion also matter.
Yamaha DGX-670: Larger Speakers, Warmer Sound
✔ Larger Speaker Size for a Fuller Sound
The DGX-670 features two 12 cm speakers, which are noticeably larger than the PX-S3100’s compact oval speakers. The increased speaker size results in a warmer, more natural sound that closely mimics the resonance of an acoustic piano.
✔ Great Bass Response
One of the standout qualities of the DGX-670’s speaker system is its deep and powerful bass response. Thanks to its built-in Intelligent Acoustic Control (IAC) and Stereo Optimizer, Yamaha has designed this digital piano to offer:
- Richer bass frequencies that make low notes feel more substantial.
- A well-balanced mid and treble range that provides a natural listening experience.
This makes the DGX-670 a fantastic choice for players who want a more immersive, full-bodied piano tone, especially for classical and jazz music.
⚠️ Downsides:
- Less wattage (12W total) means that while the sound is rich, it’s not as loud as Casio’s PX-S3100.
- Heavier and bulkier design makes it less portable for live performances.
Casio PX-S3100: Compact Speakers, Clear Sound
✔ Higher Wattage for Louder Output
Despite its compact design, Casio packed 16W of total amplification into the PX-S3100. This means:
- Higher volume output, which is useful for small gigs or rehearsals without an external amplifier.
- Clear projection, making it a great choice for pop, rock, and contemporary music settings.
✔ Wide Sound Dispersion with Oval Speakers
Instead of traditional round speakers, Casio uses two oval-shaped full-range speakers. These help project sound more efficiently, ensuring the piano sounds balanced even in a small space.
✔ Surround Sound Effect with Built-in DSP
The PX-S3100 features Casio’s DSP (Digital Signal Processing) effects, which include:
- Surround sound simulation for a more immersive experience.
- EQ adjustments that let you tweak the tone to your preference.
This is particularly useful for players who want a more modern, “produced” sound, rather than a pure acoustic piano simulation.
⚠️ Downsides:
- Smaller speaker size (compared to Yamaha) means it lacks the deep, rich bass response found in the DGX-670.
- Lighter piano body means sound reverberation isn’t as deep or immersive as Yamaha’s larger casing.
Speaker Placement & Sound Projection
Speaker placement and orientation affect how well the sound is projected.
Yamaha DGX-670: Downward-Facing, Cabinet-Style Sound
- The DGX-670’s speakers are positioned downward, which helps simulate the resonance of a grand piano.
- Better stereo separation makes the piano sound wider and more three-dimensional.
- However, if placed on a soft surface (like a bed or sofa), some sound may be absorbed, slightly reducing clarity.
Casio PX-S3100: Front-Facing for Direct Sound
- The PX-S3100’s speakers face forward, making the sound clear and direct to the player.
- Great for live performance settings, as it projects sound toward the audience rather than downward.
- Not as deep or resonant as Yamaha, but better clarity in band settings.
✔ Winner for Immersive Home Playing: Yamaha DGX-670
✔ Winner for Direct, Clear Projection: Casio PX-S3100
External Amplification & Connectivity
If you plan to perform live or record music, you may need to connect your digital piano to external speakers or an amplifier.
Yamaha DGX-670 External Sound Options:
- Line Out & USB Audio: The DGX-670 allows you to send high-quality digital audio to an external system.
- No Bluetooth Audio: Unlike Casio, Yamaha does not offer Bluetooth audio streaming.
Casio PX-S3100 External Sound Options:
- Line Out & Bluetooth Audio: You can connect to external speakers or headphones wirelessly, which is a huge plus for gigging musicians.
- USB Audio Interface: Can be used for recording and DAW integration.
✔ Winner for Bluetooth & Wireless Convenience: Casio PX-S3100
✔ Winner for High-Quality Line Out Recording: Yamaha DGX-670
Which Digital Piano Has the Better Speaker System?
Pick the Yamaha DGX-670 if you want:
✔ A warmer, more immersive sound
✔ A deep bass response for classical and jazz playing
✔ A full, natural piano resonance
Pick the Casio PX-S3100 if you want:
✔ Louder speaker output for live performances
✔ Clearer projection with modern DSP effects
✔ Bluetooth audio connectivity for wireless playback
Final Verdict: Which Has the Better Sound System?
| Feature | Yamaha DGX-670 | Casio PX-S3100 |
|---|---|---|
| Speaker Power | ❌ 12W (6W + 6W) | ✅ 16W (8W + 8W) |
| Bass Response | ✅ Strong, warm bass | ❌ Weaker bass due to smaller speakers |
| Clarity & Projection | ✅ Wide, stereo imaging | ✅ Direct, front-facing sound |
| Immersion & Realism | ✅ More natural resonance | ❌ Less depth in piano tones |
| External Amplification | ✅ Line Out, USB Audio | ✅ Line Out, USB Audio, Bluetooth |
✔ Winner for Home Use & Acoustic Realism: Yamaha DGX-670
✔ Winner for Performance & Portability: Casio PX-S3100
If you want deep bass, immersive sound, and classical/jazz realism, go with the Yamaha DGX-670. If you need louder volume, clear projection, and Bluetooth connectivity, the Casio PX-S3100 is the better choice.
Features & Functions
Beyond the keyboard action and sound quality, the features and functions of a digital piano can greatly impact its versatility and usability. The Yamaha DGX-670 and Casio PX-S3100 are not just digital pianos—they are feature-packed instruments that offer a variety of tools for accompaniment, recording, performance, and customization.
In this section, we’ll compare:
- Accompaniment & Rhythms
- Recording & Playback Capabilities
- Effects & Sound Customization
- Layering & Splitting Functions
- Learning Tools & Onboard Lessons
Accompaniment & Rhythms
One of the biggest advantages of both pianos is their ability to function as more than just pianos. Both the DGX-670 and PX-S3100 include auto-accompaniment features, allowing you to play with a backing band in various musical styles.
Yamaha DGX-670: Advanced Accompaniment Styles
The DGX-670 is essentially a hybrid between a digital piano and an arranger keyboard, meaning it has a highly developed auto-accompaniment system.
✔ 263 Accompaniment Styles:
- Includes pop, jazz, blues, Latin, rock, classical, and cinematic styles.
- More detailed, realistic backing arrangements than Casio’s rhythms.
- Allows for full-band performances, controlled dynamically by your left-hand chords.
✔ Intelligent Auto-Accompaniment:
- You can control chord progressions in real-time.
- Styles adapt dynamically based on your playing, offering intro, variation, and ending transitions.
⚠ Downsides:
- The learning curve is steeper for beginners.
- The DGX-670’s focus on accompaniment makes the interface more complex.
Casio PX-S3100: Versatile Rhythms for Performance
Casio takes a simpler approach to auto-accompaniment, focusing on rhythm-based backing tracks rather than full-band orchestration.
✔ 200 Rhythms:
- Covers pop, dance, funk, R&B, jazz, and Latin beats.
- More beat-driven than Yamaha’s full-band arrangements.
- Great for solo performance and singer-songwriters.
✔ Chord Mode:
- Recognizes chord progressions and adjusts rhythms accordingly.
- Less intricate than Yamaha’s adaptive accompaniments, but still useful.
⚠ Downsides:
- Not as sophisticated as Yamaha’s full-band accompaniments.
- Less suited for complex musical arrangements.
Winner: Yamaha DGX-670
✔ If you want rich, adaptive accompaniments with full-band backing, the Yamaha DGX-670 is the clear winner.
✔ If you just need basic rhythms to enhance solo performances, the PX-S3100 does the job well.
Recording & Playback Capabilities
Both pianos allow you to record your performances, which is essential for composing, practicing, and performing.
Yamaha DGX-670: Advanced Multi-Track Recording
✔ 16-Track MIDI Recorder:
- Allows you to record multiple instrument layers, just like a mini-DAW (Digital Audio Workstation).
- Perfect for songwriters and producers who want to create multi-instrument compositions.
✔ Audio Recording & Playback:
- Record in WAV format and save directly to USB.
- Supports MP3 playback, allowing you to play along with backing tracks.
⚠ Downsides:
- The recording process is more complex due to the multi-track system.
- Requires some menu navigation, which may take time to learn.
Casio PX-S3100: Simple but Effective Recording
✔ 2-Track MIDI Recorder:
- You can record two parts separately, such as a left-hand bass line and a right-hand melody.
- Simpler than Yamaha’s 16-track system, but still useful for basic compositions.
✔ Audio Recording & Bluetooth Playback:
- You can record and save performances as WAV files.
- Supports Bluetooth Audio, allowing you to stream backing tracks wirelessly.
⚠ Downsides:
- Lacks multi-track MIDI recording, so layering multiple instruments is harder.
- More suited for live performance recording rather than full compositions.
Winner: Yamaha DGX-670
✔ If you need detailed recording with multiple layers, the DGX-670 is the better choice.
✔ If you just need quick recordings for practice or live use, the PX-S3100 is more convenient.
Effects & Sound Customization
Both pianos offer built-in effects, allowing you to enhance and shape the sound.
Yamaha DGX-670: Deep Sound Editing
✔ Reverb, Chorus & EQ:
- You can adjust hall reverb, brightness, and chorus effects to customize your sound.
✔ Virtual Resonance Modeling (VRM Lite):
- Adds realistic resonance to the piano tone, mimicking how real pianos respond to pedal use.
✔ Mic Effects:
- If you connect a microphone, you can add vocal effects like reverb and harmony.
Casio PX-S3100: DSP Effects & Sound Layering
✔ DSP Effects:
- Includes chorus, delay, phaser, and reverb, great for modern sound shaping.
✔ Layering & Split Mode:
- You can combine two sounds together, such as piano + strings or bass + electric piano.
⚠ Downsides:
- The lack of VRM-style resonance makes the piano sound less natural compared to Yamaha.
Winner: Tie
✔ If you want acoustic realism, go with the Yamaha DGX-670.
✔ If you want modern DSP effects, the PX-S3100 is better.
Learning Tools & Onboard Lessons
For beginners, having learning tools built into the piano can be a huge benefit.
Yamaha DGX-670: Smart Pianist Integration
✔ Built-in Lesson Mode:
- Displays sheet music and lets you practice with guided feedback.
✔ Smart Pianist App Compatibility:
- Can analyze songs and generate chord progressions automatically.
Casio PX-S3100: Chordana Play for Learning
✔ Chordana Play App:
- Lets you practice with interactive lessons using a smartphone or tablet.
✔ Onboard Lesson Mode:
- Includes built-in lesson songs and exercises for beginner pianists.
⚠ Downsides:
- Yamaha’s Smart Pianist app has more advanced features.
Winner: Yamaha DGX-670
✔ If you need serious learning tools, Yamaha’s lesson mode and Smart Pianist app are more advanced.
Final Verdict: Which Has Better Features?
| Feature | Yamaha DGX-670 | Casio PX-S3100 |
|---|---|---|
| Auto-Accompaniment | ✅ 263 Full Band Styles | ⚠ 200 Rhythms Only |
| Recording | ✅ 16-Track MIDI & WAV | ⚠ 2-Track MIDI & WAV |
| Sound Customization | ✅ VRM & EQ | ✅ DSP Effects |
| Layering & Splitting | ✅ Yes | ✅ Yes |
| Learning Tools | ✅ Smart Pianist App | ⚠ Chordana Play |
✔ Winner for Advanced Features & Accompaniment: Yamaha DGX-670
✔ Winner for Simplicity & Performance Use: Casio PX-S3100
Which One Should You Choose?
✔ If you want advanced recording, accompaniment, and learning features, choose the Yamaha DGX-670.
✔ If you want a simple, gig-friendly digital piano with rhythm backing and sound layering, the Casio PX-S3100 is a great choice.
Connectivity & Compatibility
In today’s world, connectivity is just as important as sound quality and keyboard feel when choosing a digital piano. Whether you’re a home player, performer, or music producer, the ability to connect your digital piano to computers, external speakers, recording software, or even mobile apps can significantly expand its functionality.
Both the Yamaha DGX-670 and Casio PX-S3100 offer a variety of connectivity options, but they cater to different types of users. In this section, we’ll compare:
- USB and MIDI capabilities
- Bluetooth functionality
- Audio input/output options
- App compatibility and DAW integration
- Microphone and pedal connectivity
USB & MIDI Connectivity
Both pianos support USB connectivity, but there are some key differences in how they handle MIDI and audio transfer.
Yamaha DGX-670: USB Audio & MIDI
✔ USB to Host (MIDI & Audio):
- Allows you to connect directly to a computer or mobile device for use with DAWs (Digital Audio Workstations) like GarageBand, Logic Pro, Ableton Live, and FL Studio.
- Unlike some digital pianos that only support MIDI over USB, the DGX-670 supports both MIDI and digital audio, meaning you can send high-quality sound directly to your computer without an audio interface.
✔ USB to Device:
- Lets you save and transfer songs via USB flash drive.
- Great for backing up performances or transferring files without needing a computer.
⚠ No Dedicated MIDI Ports:
- The DGX-670 lacks traditional 5-pin MIDI in/out ports, so you’ll need a USB-to-MIDI adapter if you want to connect it to older MIDI hardware.
Casio PX-S3100: USB & MIDI Flexibility
✔ USB to Host (MIDI & Audio):
- Like the Yamaha, Casio’s PX-S3100 supports both MIDI and digital audio over USB.
- This makes it easy to record into DAWs without needing an external interface.
✔ MIDI Bluetooth Support:
- You can wirelessly send MIDI data to your computer or tablet, making it perfect for mobile music production.
- Works with apps like GarageBand, FL Studio Mobile, and Synthesia.
⚠ No USB to Device Port:
- Unlike Yamaha, Casio does not have a USB to Device port for saving performances to a flash drive.
Winner: Casio PX-S3100 (For MIDI Flexibility & Wireless Integration)
✔ Casio’s Bluetooth MIDI makes it more convenient for mobile music producers.
✔ Yamaha’s USB-to-Device feature is useful for backing up performances.
Bluetooth Connectivity
Bluetooth is becoming an essential feature in digital pianos, allowing for wireless audio streaming and MIDI connections.
Yamaha DGX-670: No Bluetooth
❌ No built-in Bluetooth support
- You cannot wirelessly stream audio or connect MIDI via Bluetooth.
- If you want Bluetooth functionality, you’ll need a separate Bluetooth MIDI adapter.
Casio PX-S3100: Bluetooth Audio & MIDI
✔ Bluetooth Audio Streaming:
- Lets you stream music from your phone or tablet directly to the piano’s speakers.
- Perfect for playing along with backing tracks or listening to music through the piano’s speakers.
✔ Bluetooth MIDI:
- Enables wireless MIDI connection to DAWs and learning apps.
- Reduces cable clutter and makes mobile music production much easier.
Winner: Casio PX-S3100
✔ The PX-S3100’s built-in Bluetooth is a major advantage.
✔ If you value wireless MIDI and audio streaming, Casio is the better choice.
Audio Input & Output Options
The type and quality of audio inputs/outputs determine how well a digital piano integrates with external speakers, amplifiers, and recording setups.
Yamaha DGX-670: Comprehensive Audio Outputs
✔ 1/4-inch Stereo Line Output:
- Lets you connect to external speakers or a mixing console.
- Ideal for live performances or studio recording.
✔ Headphone Jack (1/4-inch):
- Useful for silent practice.
✔ Mic Input with Vocal Effects:
- The DGX-670 includes a microphone input, allowing you to sing along with effects like reverb and harmony.
⚠ No Bluetooth Audio Output:
- Unlike the PX-S3100, you cannot send sound wirelessly to Bluetooth headphones or speakers.
Casio PX-S3100: Wireless Convenience, But No Mic Input
✔ 1/8-inch Audio Input:
- Lets you plug in a smartphone or external audio source.
✔ 1/4-inch Line Output:
- Just like Yamaha, Casio provides a dedicated line out for connecting to speakers.
✔ Bluetooth Audio Output:
- Unlike the DGX-670, the PX-S3100 lets you wirelessly stream sound to Bluetooth speakers.
⚠ No Microphone Input:
- If you want to sing and play at the same time, Casio doesn’t support a direct mic connection like Yamaha does.
Winner: Yamaha DGX-670 (For Microphone Users), Casio PX-S3100 (For Bluetooth Audio)
✔ If you want built-in mic effects, go with the Yamaha DGX-670.
✔ If you want Bluetooth audio output, the PX-S3100 is better.
App Compatibility & DAW Integration
Yamaha DGX-670: Smart Pianist App Integration
✔ Smart Pianist App:
- Works with iOS devices to provide chord analysis, interactive lessons, and tone adjustments.
- More advanced than Casio’s Chordana Play.
✔ DAW Integration:
- Works seamlessly with GarageBand, Cubase, Logic Pro, and Ableton Live via USB.
Casio PX-S3100: Chordana Play App & Wireless MIDI
✔ Chordana Play App:
- Allows you to learn songs with interactive lessons and MIDI playback.
- Great for beginners, but not as powerful as Yamaha’s Smart Pianist app.
✔ Wireless DAW Integration:
- Casio’s Bluetooth MIDI makes it easier to connect to DAWs wirelessly.
Winner: Yamaha DGX-670 (For Smart Pianist Features), Casio PX-S3100 (For Wireless DAW Integration)
✔ If you want powerful learning tools, Yamaha’s Smart Pianist app is better.
✔ If you want wireless DAW connectivity, the PX-S3100 is more convenient.
Pedal Compatibility
Yamaha DGX-670: Compatible with Half-Damper Pedals
✔ Works with Yamaha’s FC3A pedal, allowing for half-damper functionality.
Casio PX-S3100: Supports Triple-Pedal Unit
✔ Compatible with Casio’s SP-34 pedal unit, which includes soft, sostenuto, and damper pedals.
✔ Winner: Casio PX-S3100 (For Full Pedal Compatibility)
✔ If you want a true grand piano pedal experience, Casio’s SP-34 pedal unit offers more flexibility.
Final Verdict: Which Digital Piano Has Better Connectivity?
| Feature | Yamaha DGX-670 | Casio PX-S3100 |
|---|---|---|
| USB MIDI & Audio | ✅ Yes | ✅ Yes |
| Bluetooth MIDI | ❌ No | ✅ Yes |
| Bluetooth Audio | ❌ No | ✅ Yes |
| Mic Input | ✅ Yes | ❌ No |
| Line Out | ✅ Yes | ✅ Yes |
| Smartphone App | ✅ Smart Pianist | ✅ Chordana Play |
| Pedal Compatibility | ✅ Half-Damper | ✅ Full Pedal Unit |
✔ Winner for Bluetooth & Wireless DAW Integration: Casio PX-S3100
✔ Winner for Microphone & Learning Tools: Yamaha DGX-670
Which Should You Choose?
✔ If you want Bluetooth and wireless integration, go with the Casio PX-S3100.
✔ If you need microphone input and advanced learning features, choose the Yamaha DGX-670.
Value for Money
When investing in a digital piano, value for money isn’t just about the price—it’s about what you get for the money in terms of build quality, sound, features, and overall longevity.
Both the Yamaha DGX-670 and Casio PX-S3100 fall within the mid-range price category, making them affordable for serious beginners, intermediate players, and even gigging musicians. But which one offers better value based on features, build quality, and long-term use?
Price Comparison
| Model | Approximate Price (Varies by Region) |
|---|---|
| Yamaha DGX-670 | $850 – $1,000 (without stand) |
| Casio PX-S3100 | $800 – $950 |
While prices fluctuate depending on location and promotions, both models are competitively priced and often fall within a $50–$100 difference.
⚠ Important Note:
- The Yamaha DGX-670 stand (L-300) is sold separately and costs around $150–$200, making the total package more expensive if you need a stand.
- The Casio PX-S3100 is more portable, so it doesn’t require a dedicated stand unless you prefer a fixed setup.
What You Get for the Money
While the Yamaha DGX-670 and Casio PX-S3100 are similarly priced, they offer different strengths in terms of features and usability.
Build Quality & Design
✔ Yamaha DGX-670: More durable but bulkier.
✔ Casio PX-S3100: Lighter and portable, but slightly less sturdy.
If you need a sturdy home instrument, the DGX-670 offers a more solid, workstation-style build. If you travel frequently, the PX-S3100 is easier to transport.
Keyboard & Action
✔ Yamaha DGX-670: GHS action is realistic but has plastic keys.
✔ Casio PX-S3100: Lighter key action but textured key surfaces (ivory/ebony feel).
If you’re serious about piano playing, the Yamaha DGX-670’s heavier action provides a closer feel to an acoustic piano. If you prefer a lighter touch for fast playing, the PX-S3100’s action may feel more comfortable.
Sound Quality & Features
✔ Yamaha DGX-670: More realistic grand piano sound (CFX) and better auto-accompaniment.
✔ Casio PX-S3100: More sound variety (700 tones) and Bluetooth connectivity.
If you prioritize sound realism and deep expression, the Yamaha DGX-670’s piano tone is superior. If you need a variety of modern sounds for performance and production, the Casio PX-S3100 is better.
Portability & Performance Use
✔ Yamaha DGX-670: Heavier, better for home/studio use.
✔ Casio PX-S3100: Ultra-portable, battery-powered option for gigs.
If you play at home or need a workstation-style keyboard, the DGX-670 is great. If you need a lightweight, gig-friendly piano, the PX-S3100 is the clear winner.
Connectivity & Technology
✔ Yamaha DGX-670: Better learning tools, mic input, and Smart Pianist integration.
✔ Casio PX-S3100: Bluetooth MIDI & audio streaming, better for mobile use.
If you prefer wireless features, the PX-S3100’s Bluetooth connectivity adds significant value. If you want a digital piano with powerful learning tools, the DGX-670 is better for students.
Which One Offers Better Long-Term Value?
- If you want a versatile, home-friendly piano with great accompaniment features, the Yamaha DGX-670 offers better value for structured playing and practice.
- If you want a lightweight, high-tech digital piano for gigging, mobile production, or Bluetooth connectivity, the Casio PX-S3100 is a better investment.
✔ Best for Classical & Home Use: Yamaha DGX-670
✔ Best for Performers & Mobile Musicians: Casio PX-S3100
Both models are excellent choices, but your decision should be based on your personal needs and playing style!
Pros & Cons of Each Model
Now that we’ve thoroughly analyzed the Yamaha DGX-670 and Casio PX-S3100, let’s summarize their strengths and weaknesses to help you decide which one suits your needs best.
Yamaha DGX-670: Pros & Cons
✔ Pros:
✅ Authentic Grand Piano Sound: Uses Yamaha’s CFX Grand Piano sampling and Virtual Resonance Modeling (VRM Lite) for a rich, realistic tone.
✅ Weighted GHS Key Action: Provides a realistic piano feel, making it great for developing technique.
✅ Advanced Auto-Accompaniment: Features 263 accompaniment styles for one-man-band performances.
✅ Great Learning Features: Compatible with Yamaha’s Smart Pianist app and has built-in lesson tools.
✅ Microphone Input with Vocal Effects: Ideal for singers who want to perform and record vocals.
✅ Powerful Recording Options: 16-track MIDI recording and USB audio recording for music production.
❌ Cons:
⚠ Bulky & Heavy: Weighs 47 lbs (21.4 kg), making it less portable than the PX-S3100.
⚠ No Bluetooth: Lacks Bluetooth MIDI or audio streaming, unlike Casio’s model.
⚠ Plastic Keys: Lacks textured key surfaces, which some players prefer for grip.
⚠ Requires Separate Stand: The L-300 stand is sold separately, increasing the overall cost.
Casio PX-S3100: Pros & Cons
✔ Pros:
✅ Ultra-Portable & Lightweight: At 25.1 lbs (11.4 kg), it’s one of the slimmest and most portable 88-key digital pianos.
✅ Bluetooth MIDI & Audio: Offers wireless connectivity, allowing for Bluetooth DAW control and audio streaming.
✅ Textured Ebony & Ivory Keys: Feels more realistic and comfortable compared to Yamaha’s smooth plastic keys.
✅ Great for Modern Styles: Includes 700 tones and DSP effects, making it ideal for pop, rock, and synth-heavy music.
✅ Battery-Powered Option: Can run on 6 AA batteries, making it ideal for gigs and travel.
❌ Cons:
⚠ Lighter Key Action: While comfortable, Casio’s Smart Scaled Hammer Action is lighter than Yamaha’s GHS, which may not feel as realistic for classical players.
⚠ No Microphone Input: Unlike Yamaha, it does not support direct mic input for singing performances.
⚠ Weaker Bass Response: The smaller speakers lack the depth of the DGX-670’s sound system.
⚠ Simpler Accompaniment Styles: Only 200 rhythm accompaniments, compared to Yamaha’s 263 full-band styles.
Final Thoughts:
✔ If you want a realistic home piano experience with deep sound, weighted keys, and advanced accompaniment, go for the Yamaha DGX-670.
✔ If you need a lightweight, Bluetooth-enabled, gig-friendly piano with modern features, the Casio PX-S3100 is the better choice.
Conclusion & Final Verdict
Both the Yamaha DGX-670 and Casio PX-S3100 are excellent digital pianos, but they cater to different types of musicians. Your choice will depend on your priorities, playing style, and intended use.
Who Should Choose the Yamaha DGX-670?
The DGX-670 is the better choice for players who want a rich, immersive piano experience at home or in a studio. It offers:
✔ A high-quality piano sound powered by Yamaha’s CFX Grand Piano sampling and VRM Lite modeling.
✔ A realistic GHS key action that helps develop proper finger technique.
✔ Advanced auto-accompaniment with 263 styles, making it great for one-man-band performances.
✔ A microphone input with vocal effects, making it ideal for singer-songwriters and live performers.
✔ Superior learning tools, including Smart Pianist app compatibility and built-in lessons.
⚠ However, it is bulky, lacks Bluetooth, and isn’t ideal for musicians who need a portable setup.
Who Should Choose the Casio PX-S3100?
The PX-S3100 is the better choice for musicians who prioritize portability, modern features, and versatility. It excels in:
✔ Ultra-portability, weighing only 25.1 lbs (11.4 kg), making it perfect for gigging musicians.
✔ Bluetooth MIDI & Audio, allowing for wireless streaming and DAW integration.
✔ Textured ebony & ivory keys, offering a better grip compared to Yamaha’s smooth plastic keys.
✔ 700 voices and DSP effects, making it great for pop, rock, and modern music production.
✔ Battery power option, allowing it to be used anywhere without needing a power outlet.
⚠ However, its key action is lighter, the speakers lack deep bass, and it has no microphone input.
Final Verdict: Which One Should You Buy?
✔ If you want a realistic piano experience with deep sound, weighted keys, and learning tools, get the Yamaha DGX-670.
✔ If you need a lightweight, Bluetooth-enabled, gig-friendly piano with modern features, go for the Casio PX-S3100.
Both are fantastic choices, but the right one depends on how and where you plan to use it! 🎹