If you’re eyeing a digital piano that nails the essentials for home practice and casual performance—without blowing your budget or filling your living room with a full-on stage setup—the Yamaha YDP-S35 and YDP-S55 are probably on your radar.

They’re both part of Yamaha’s Arius line, aimed at beginner to intermediate players who want a realistic playing experience in a compact, furniture-style cabinet. These two models are quite similar on paper, but the differences—subtle as they may seem—can impact your experience depending on your priorities.

Let’s break it all down and figure out which one is the better pick for you.

Yamaha YDP-S35 vs. YDP-S55 Comparison Chart

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Feature	Yamaha YDP-S35	Yamaha YDP-S55

Price	Check the best price on Amazon	Check the best price on Amazon
Keyboard Action	GHS (Graded Hammer Standard)	GH3 (Graded Hammer 3)
Sensors	2	3
Key Material	Plastic, matte black keys	Synthetic ivory & ebony
Tone Generator	Yamaha CFX Sampling	Yamaha CFX Sampling
Polyphony	192 notes	192 notes
Voices	10	10
Effects	4 Reverb Types	4 Reverb Types
Modes	Dual, Duo	Dual, Duo
Internal Recording	2-track MIDI recorder (1 song)	2-track MIDI recorder (1 song)
Amplifier Output	2 x 8W	2 x 20W
Speakers	12 cm x 2	12 cm x 2
Speaker Placement	Downward-facing	Front and downward projection
Pedals	3 (Soft, Sostenuto, Damper) with half-damper support	3 (Soft, Sostenuto, Damper) with half-damper support
Headphone Outputs	2 x 1/4″ (6.35mm)	2 x 1/4″ (6.35mm)
USB to Host	Yes (MIDI + Audio)	Yes (MIDI + Audio)
Bluetooth	Not built-in (MIDI via optional adapter)	Not built-in (MIDI via optional adapter)
Smart Pianist App	Supported	Supported
Finish Options	Black, White, Dark Rosewood	Black, White, Dark Rosewood
Dimensions (W x D x H)	1,366 x 296 x 792 mm (w/ music rest)	1,353 x 396 x 792 mm (w/ music rest)
Weight	36.0 kg (79.4 lbs)	42.0 kg (92.6 lbs)
Cabinet Design	Slim, modern	Traditional, deeper and sturdier
My individual reviews	Yamaha YDP-S35 review	Yamaha YDP-S55 review

Design and Build Quality

When it comes to digital pianos, design is more than just looks. It’s about how the instrument fits into your home, how it feels when you sit down to play, and how well it’s built to last. The Yamaha YDP-S35 and YDP-S55 approach design from two different angles, and the choice between them could come down to how much weight you place on form versus function—or both.

Let’s break down how these two stack up in terms of aesthetics, materials, size, ergonomics, assembly, durability, and day-to-day usability.

Aesthetics and Style

YDP-S35: Modern, Minimalist, Compact

The “S” in YDP-S35 stands for “Slim,” and Yamaha fully leans into that concept. This model is designed to take up as little visual and physical space as possible without sacrificing the essentials.

From a visual standpoint, the S35 is clean and contemporary. It has a flat, linear look—almost Scandinavian in its minimalism. There are no ornate flourishes, no bulky cabinet pieces, and no overhangs. It’s essentially a slim rectangular shell with clean lines, housing the keyboard and pedal unit.

The key cover slides down flush to become part of the front panel, which keeps the design streamlined when it’s closed. This piano can sit neatly against a wall and blend into a modern living room, office, or small apartment without screaming “musical instrument.” It doesn’t demand attention, and for a lot of buyers, that’s a plus.

Available in three finishes—Black, White, and Dark Rosewood—it can match most décor styles. The white version, in particular, looks great in bright rooms and small spaces, where darker furniture might dominate too much.

YDP-S55: Traditional, Substantial, Elegant

The YDP-S55 is more in line with what most people picture when they think of a home digital piano. It looks like a classic upright console, with a broader and deeper cabinet, more visual weight, and a traditional aesthetic.

Unlike the S35, the S55 isn’t trying to disappear into the background. It’s built to look like a real piece of furniture—something that wouldn’t be out of place in a formal sitting room or dedicated music area. The woodgrain texture is deeper and more realistic, the finish has more depth, and the overall design feels more elegant and permanent.

The S55 is also available in a few finish options, including Black, Dark Rosewood, and White, all of which look more polished than the S35 equivalents. The materials and attention to detail in the finishes are clearly a step above the S35—more sheen, more depth, more refinement.

If you want your piano to look and feel premium, the S55 wins easily.

Materials and Construction

Both pianos are primarily constructed from MDF (medium-density fiberboard) and other engineered wood products. This is standard in this price range. Don’t expect real hardwood—but Yamaha does a good job with the faux finishes.

That said, the build quality on the S55 is noticeably better. It feels more rigid and stable when assembled. The panels are thicker, and the joints fit together with tighter tolerances. When you press the keys or use the pedals, the S55 has less cabinet flex and feels more like a true acoustic console piano.

The S35, while solid, does feel a bit lighter and more utilitarian. The panel surfaces are thinner, and if you press down hard on the top or lean on the front panel, you can feel a bit of give. It’s not flimsy, but it’s not tank-like either. For the price and purpose, it holds up well—but if you’re expecting heirloom-level durability, look to the S55 or higher-end Clavinovas.

Size and Space Requirements

This is where the S35 shines. With dimensions of roughly 53.4″ (W) x 13.4″ (D) x 31.6″ (H), it’s a great pick for tight spaces. Whether you’re putting it in a corner of a bedroom, a small apartment living room, or even a hallway nook, the S35 is easier to fit in.

It’s also lighter—about 79 lbs (36 kg) fully assembled. That makes it much easier to move or reconfigure if you like to rearrange your furniture once in a while.

The S55, on the other hand, comes in at about 54.3″ (W) x 16.6″ (D) x 32.8″ (H) and weighs 92.6 lbs (42 kg). So while the width difference is negligible, that extra 3+ inches of depth does matter in smaller rooms, especially when you’re trying to walk around the instrument.

If space is limited, the S35 gives you more flexibility. If space is not a concern, the S55 gives you a more grounded, full-bodied presence.

Ergonomics and Playing Comfort

Both models are fairly similar in height and key positioning. Once you’re seated, they feel about the same in terms of bench-to-keyboard ratio and posture. However, the S55 has a slight edge in comfort for extended playing.

Why? Two reasons:

Deeper Cabinet – The larger frame allows for slightly more knee clearance, and the music stand feels more stable and less tippy.
Wider Side Panels – When playing for long periods, the sturdier sides offer a more stable feel. You’re less likely to feel vibrations or movement during intense passages.

The S35 is still comfortable to play, but it has a more “lightweight” feel. If you’re playing aggressive classical pieces or doing long practice sessions, the S55’s solidity becomes noticeable.

Assembly Experience

Both the S35 and S55 ship flat-packed and require self-assembly. If you’ve ever put together IKEA furniture, you’ll be fine. You’ll typically be putting together:

The side panels
The backboard
The pedal assembly
Mounting the keyboard unit

The S35 is easier to assemble, thanks to its lighter parts and slimmer frame. One person can manage it solo, although a second person helps during alignment.

The S55 is heavier and bulkier, which means more care is needed during setup. You’ll want two people for sure—especially when mounting the main keyboard housing onto the base.

Once assembled, both feel solid, but the S55 feels more substantial and stable under your hands.

Day-to-Day Living with These Pianos

S35: Everyday Convenience

The compact design of the S35 makes it easier to integrate into everyday life. It tucks into corners and under shelving. When closed, it looks like a minimalist cabinet and doesn’t draw attention. If you want a piano that doesn’t dominate a space, this is a win.

It’s also easier to clean around and under due to its lower weight and narrower footprint.

S55: Statement Piece

The S55 is more of a permanent installation. You’ll likely pick a spot for it and leave it there for years. It’s a centerpiece, not a background player. It feels like a piece of the home, not an accessory.

This can be a good or bad thing depending on your lifestyle and space.

Conclusion: Design and Build Quality

YDP-S35 is for those who want minimalism, portability, and compact convenience. It fits small homes, blends into modern spaces, and won’t overpower a room.
YDP-S55 is for players who value stability, elegance, and the feel of a “real” piano. It takes up more space, costs more, but gives you a more authentic visual and tactile experience.

There’s no universal winner here—it really comes down to how and where you plan to use your piano, and how much you value aesthetics versus practicality.

If your digital piano needs to quietly fit in with modern furniture, go S35.
If you want it to look and feel like a dedicated musical instrument, go S55.

Keyboard Action

When people talk about how a digital piano “feels,” they’re really talking about keyboard action. It’s arguably the most critical part of any digital piano because it determines how natural and expressive your playing can be. Even the most realistic sound engine can feel hollow if the key action is stiff, unresponsive, or plasticky.

In the case of the Yamaha YDP-S35 and YDP-S55, we’re looking at two different keyboard mechanisms: GHS (Graded Hammer Standard) in the S35, and GH3 (Graded Hammer 3) in the S55. Both are designed to replicate the feel of an acoustic piano, but the differences are more than just marketing terms—they translate directly into the playing experience.

Overview of GHS vs GH3

Let’s start by looking at what each action offers at a technical level.

GHS – Graded Hammer Standard (YDP-S35)

Fully weighted keys
Graded hammer action (heavier in the bass, lighter in the treble)
2-sensor system
Matte black keytops, glossy white keys
No escapement simulation
No texture on white keys
Lighter overall action

GHS is Yamaha’s most common entry-to-mid-level action. You’ll find it in popular models like the P-125, DGX-670, and other affordable digital pianos. It’s designed to offer a reasonably realistic playing feel without increasing the price point or weight too much.

GH3 – Graded Hammer 3 (YDP-S55)

Fully weighted keys
Graded hammer action
3-sensor system
Synthetic ivory and ebony keytops (textured)
No escapement, but smoother return action
Heavier, more resistant feel

GH3 is a step up. It’s not Yamaha’s top-of-the-line (that would be NWX or GrandTouch), but it’s a clear upgrade from GHS in almost every way. It’s built to provide faster repetition, better key return, and a more acoustic-like feel.

Touch and Resistance

The biggest practical difference between GHS and GH3 is the weight and responsiveness of the keys.

The GHS action in the S35 is on the lighter side, especially in the mid and upper registers. This can be a pro or a con depending on your perspective. For beginners or younger players, lighter keys can feel easier to press, reducing fatigue during practice. It’s a “friendly” action that doesn’t fight you when you’re still learning finger strength.

However, for experienced players, especially those coming from acoustic backgrounds, the GHS can feel a bit too light and springy. It lacks resistance during fast passages and doesn’t offer the nuanced pushback you’d get from a real hammer striking a string.

The GH3 in the S55 feels closer to a real upright piano. There’s more inertia at the bottom of the key travel. This matters because it helps train your fingers to control dynamics more precisely. Soft passages feel more intentional. Loud chords feel grounded and full. There’s just more physical feedback, and that feedback makes a difference in your control and technique.

Sensor System: 2-Sensor vs 3-Sensor

This is where the rubber meets the road in terms of playability.

The GHS in the S35 uses a 2-sensor system, which means the piano detects when a key is pressed and released using two points of data. That works fine for most scenarios, but it falls short in situations where rapid note repetition is needed—such as trills, fast legato passages, or repeating a note without fully releasing the key.

The GH3 in the S55 uses a 3-sensor system, which allows the piano to detect partial releases and replays. This is much closer to how a real piano works: you can re-strike a note without lifting your finger all the way off the key, and the piano will register it accurately.

If you’ve ever played a Chopin etude or a jazz riff where your fingers need to dance fast and light, GH3 feels like a revelation compared to GHS.

Keytop Material and Grip

Keytops might seem like a minor detail, but they seriously affect comfort and control during long practice sessions.

The S35’s GHS keybed uses standard plastic white keys with a matte finish on the black ones. They’re smooth and serviceable, but not particularly inspiring. If your fingers get sweaty during long playing sessions, the glossy white keys can become slippery.

The S55’s GH3 keys feature synthetic ivory and ebony keytops. These are textured and porous, giving you much better grip and tactile feedback. It feels closer to real ivory keys (which were phased out for ethical reasons decades ago), and the subtle texture really helps with finger placement and stability.

If you’re practicing for hours, or playing expressively, the keytops on the S55 make a clear difference.

Quietness and Mechanical Feel

Both keyboards are relatively quiet, but they’re not completely silent. You’ll hear some mechanical thuds if you’re playing in a silent room without headphones.

The GHS in the S35 has a bit more plastic “bounce” to it. It feels lighter and has a more noticeable rebound sound when the key returns.
The GH3 in the S55 feels more damped and solid. It’s quieter and more refined, with a deeper action that feels better engineered.

If you live in a shared space and plan to practice at odd hours, the slightly quieter GH3 action may be appreciated by others in the household.

Suitability for Different Playing Styles

For Classical Players:

No contest—the GH3 in the S55 is better. The weight, three-sensor system, and textured keys all matter when you’re interpreting dynamics, phrasing, and articulation. If you’re working through intermediate to advanced pieces or preparing for exams, the GH3 gives you the edge.

For Casual or Pop Players:

The S35’s GHS will get the job done. If you’re mainly playing chords, ballads, or simpler songs, you might not miss the subtle differences. Lighter action could even feel more fun and snappy for some pop/jazz pieces.

For Beginners:

Both are fine for beginners, but here’s the catch: GH3 will help train better technique from the start. If the budget allows, it’s a better long-term investment because you won’t outgrow it as quickly.

Consistency and Calibration

Another perk of the GH3 action is key-to-key consistency. The action feels uniform across the entire keyboard. The weight is properly graded, and each key offers consistent response. GHS is more variable; some keys can feel slightly uneven, particularly in the transition zones (around middle C).

While this isn’t a dealbreaker, if you have a sharp ear and practiced fingers, you’ll notice.

Durability and Longevity

Both GHS and GH3 actions are designed to last for years, but the GH3 is built to withstand more demanding playing. The heavier materials and extra sensor mean it’ll hold up better under constant daily practice, especially if you’re playing advanced material.

The GHS action in the S35 can wear slightly faster, especially under heavy use. Over time, the keys may feel a bit more “spongy.” For light to moderate use, though, it holds up fine.

Final Verdict: Keyboard Action

To sum it all up:

YDP-S35 (GHS) offers a decent entry-level playing experience. It’s fine for beginners and casual players. Lighter, a bit looser, and more forgiving—but it lacks refinement.
YDP-S55 (GH3) offers a more expressive, dynamic, and acoustic-like feel. Better for intermediate to advanced players, or anyone who wants to train proper technique and feel rewarded for nuanced playing.

If you can afford the upgrade and you care about how it feels to play, the S55 is the clear winner in this category. Keyboard action is one area where even small differences have a big impact—and the GH3 is simply in another league compared to GHS.

Sound Quality and Tone Engine

The sound of a digital piano is a huge part of the playing experience. It’s not just about how realistic it sounds—it’s about how it feels to play, how expressive you can be, how the piano responds to your dynamics, and how immersive the overall experience is. Yamaha has a solid reputation in this department, and both the YDP-S35 and YDP-S55 rely on the same core sound engine: the Yamaha CFX concert grand piano sample.

That might sound like these two models are identical in the tone department—but they’re not. The differences show up in how the sound is delivered (mainly through the speakers), how it interacts with your playing, and how immersive it feels through headphones or in a real room.

Let’s break it all down.

The CFX Concert Grand Sample

Both the YDP-S35 and YDP-S55 are equipped with samples taken from Yamaha’s 9-foot CFX concert grand piano—a flagship acoustic grand used in concert halls and competitions around the world. The tone of the CFX is clear, powerful, and balanced, with a bit of brightness on top that cuts through, while still offering warmth in the low end. It’s a very “modern” grand piano sound—perfect for classical, pop, and just about any style you throw at it.

Yamaha does a solid job here. The CFX sample in both models is multi-layered, meaning that different velocity levels trigger different recordings of the piano. If you play soft, you’ll hear a gentle, mellow tone. Play hard, and it opens up with rich harmonics and bite. There’s real dynamic range here—it’s not just louder and softer volumes, but actual changes in character as you play.

Verdict on Tone Character:

Warm low end
Clear, singing mids
Bright, articulate treble
Ideal for classical, but also versatile across genres

If you’re into mellow jazz, ambient film scoring, or moody ballads, the CFX tone can be a little too bright for your taste—but for most players, it’s a beautiful, expressive base.

Polyphony: 192 Notes

Both the S35 and S55 offer 192-note polyphony, which is enough to handle complex classical pieces with plenty of pedal use, overlapping notes, and layered playing.

Why does polyphony matter?

Because every time you press a key, especially with the sustain pedal down, the piano has to process and hold onto that sound. If you’re layering sounds, playing fast passages, or holding down long sustaining chords, low polyphony can result in dropped notes. That won’t happen here—192 is more than enough for anything short of Rachmaninoff.

Verdict: Equal performance here. No advantage for either model.

Sound Engine Depth: Beyond the Main Sample

The CFX sample is the headline, but Yamaha has also included some digital enhancements to make the experience more realistic:

1. Virtual Resonance Modeling Lite (VRM Lite)

Both models use VRM Lite, which simulates the resonance of strings, soundboard, and cabinet when you play. On a real piano, pressing the sustain pedal causes strings to resonate sympathetically—even if you’re not playing them directly. VRM Lite does a simplified version of this. You’ll hear richer overtones when the pedal is down or when playing chords.

It’s not as detailed or customizable as the full VRM found in Yamaha’s Clavinova models, but it’s a welcome touch at this price point. It adds realism, especially when playing slowly and letting notes ring out.

2. Damper and String Resonance

These are subtle, but they matter. You’ll hear:

The subtle bloom of harmonics when using the sustain pedal
Slight interactions between notes as they vibrate together
A more acoustic-like decay instead of a sterile digital fade-out

3. Key-Off Samples

Both pianos simulate the sound of keys being released, which helps make staccato passages and short note bursts feel more real. These are small touches, but they add to the authenticity of the playing experience.

Verdict: Both are equal in sound engine tech. They offer a very expressive, realistic simulation of a grand piano experience—especially through headphones.

Built-in Sounds and Voices

Each model includes 10 instrument voices, including:

3 Grand Piano variants (Concert, Mellow, Pop)
2 Electric Pianos
Harpsichord
Vibraphone
Strings
Organ (Pipe and Jazz)

The variety is nice, especially if you like mixing it up or layering. The main concert grand is the real star here, but the electric pianos are usable and fun. The strings are lush but simple—more suited to layering than solo use.

You can use Dual Mode to layer two voices (e.g., piano + strings) or Duo Mode to split the keyboard into two identical zones—useful for teaching or duet practice.

Verdict: Same voice library on both models. Again, no functional difference here.

Speakers: Where the Difference Really Shows

This is the biggest separator between the YDP-S35 and YDP-S55 when it comes to sound quality.

YDP-S35 Speakers:

2 x 8W amplifier
Small speaker cones
Sound is clear, but lacks body
Limited bass response
Can feel “boxy” or thin at higher volumes

For quiet practice or headphone use, this isn’t a dealbreaker. But if you rely on the built-in speakers, especially in a medium-sized room, the S35 might leave you wanting more. It simply doesn’t project the fullness of the sound engine as well as the S55.

YDP-S55 Speakers:

2 x 20W amplifier
Larger, better-placed speakers
Fuller low end, more present midrange, and better high-end sparkle
More resonance, more room-filling sound
Doesn’t distort at higher volumes

This makes a huge difference in how the piano feels to play. You can hear the full power of the CFX sample. Big chords feel more dramatic. Quiet playing feels more alive. Even casual listening while practicing is more satisfying.

Verdict: YDP-S55 wins hands-down. Same sound source, but much better delivery.

Headphone Experience

Both pianos support stereophonic optimizer—a feature that simulates how a real piano sounds in space when you’re wearing headphones. It reduces the “in-your-head” feeling of stereo playback and gives the illusion of sound coming from in front of you, not inside your ears.

This is especially nice for long practice sessions, as it feels more natural and less fatiguing.

The headphone output is clean on both models. You can use two headphone jacks simultaneously, which is great for teacher/student scenarios.

Verdict: Tie. Same tech and experience here.

Recording Quality

When you connect either model to a DAW or external speaker system using USB to Host, you get clean digital output of the piano’s audio and MIDI. The sound transmitted is identical in both models because they use the same source.

So if you’re planning to record directly via USB, there’s no difference between the S35 and S55 in terms of tone quality.

Final Thoughts on Sound Quality and Tone

Let’s simplify it:

Same tone engine. You’re getting Yamaha’s excellent CFX grand sample either way.
Same sound design features. VRM Lite, damper resonance, and key-off samples are included in both.
Same voice set and polyphony. No functional difference there.

But…

YDP-S55’s better speakers elevate everything. The CFX sample feels richer, more immersive, and more expressive when played through its 20W system.
YDP-S35 is great through headphones, average through speakers. Ideal for quiet practice, not ideal for performance or room-filling sound.

So if you’re a headphone-only player, you’ll be happy with either. But if you play out loud regularly, the YDP-S55 delivers a noticeably better sound experience—fuller, more dynamic, and closer to the real thing.

Speaker System

The speaker system in a digital piano is more important than most people realize—until they sit down to play. You can have the best sound engine in the world, but if the speakers are weak, small, or poorly placed, that great sound doesn’t reach your ears the way it should.

When comparing the Yamaha YDP-S35 and YDP-S55, it’s easy to assume they’ll sound the same since they share the same Yamaha CFX concert grand piano samples. But in practice, the speakers make a very real difference, and it’s one of the most noticeable contrasts between the two models.

Let’s dig into the technical specs, how they sound in actual use, and which one works best in different environments and use cases.

Speaker Specifications

YDP-S35

Amplifier Power: 2 x 8W (16 watts total)
Speaker Size: 12 cm (x2)
Speaker Placement: Downward-firing, inside the cabinet
Enclosure: Slim, shallow body limits resonance
Bass Ports: None

YDP-S55

Amplifier Power: 2 x 20W (40 watts total)
Speaker Size: 12 cm (x2)
Speaker Placement: Front and downward projection
Enclosure: Deeper, heavier cabinet provides more natural resonance
Bass Ports: Integrated resonance enhancement design

Sound Projection and Presence

This is where the difference between the two models is instantly noticeable.

The YDP-S35, with its modest 8-watt amplifiers and shallow cabinet, produces a clean but restrained sound. It’s perfectly fine for quiet playing, casual practice, or use in a small room. But it lacks projection and depth. The sound tends to feel directional and compressed, especially at medium to higher volumes.

The YDP-S55, on the other hand, steps things up significantly. The 20-watt amps don’t just make it louder—they give it more headroom, punch, and dynamic range. You can feel it respond more naturally to soft and loud playing, with more presence across the frequency spectrum.

The cabinet design also plays a role. The S55’s larger body acts as a natural resonator, amplifying the bass and mid frequencies in a way that makes it feel more like an acoustic piano resonating in a room. The sound blooms outward more naturally.

Bass and Low-End Response

If you’re used to acoustic pianos, one of the most noticeable things missing in many digital pianos—especially cheaper ones—is bass. That deep rumble from low-end chords or the warmth from a left-hand passage just isn’t there.

On the YDP-S35, the bass is acceptable but a bit flat and shallow. The slim cabinet limits low-frequency movement, and the small downward-facing speakers just don’t have the room to resonate deeply. If you crank the volume, you’ll get a bit more weight, but it never feels truly full. You may also notice some muddiness or loss of definition in the lower registers.

The YDP-S55 delivers a noticeably fuller and more satisfying bass response. Those 20W amplifiers push more air, and the bigger body lets low frequencies develop more naturally. The low end feels warmer, more stable, and supportive. It’s not booming or overwhelming—just balanced in a way that mimics a real acoustic upright much more effectively.

For players who use the sustain pedal often or play bass-heavy styles like classical left-hand runs, gospel, or jazz, this difference is not just noticeable—it’s meaningful.

Highs and Clarity

Both pianos reproduce high frequencies well, but again, the S55 takes the lead. The treble on the S35 can sound a bit sharp or thin, especially at higher volumes. It’s clean, but doesn’t sparkle. With the S55, the highs are more detailed, open, and rounded. There’s better separation between notes, especially in complex chords or pieces with a lot of interplay between hands.

This comes into play during dynamic playing. When you shift from a whisper-quiet phrase into a loud, dramatic passage, the S55 maintains clarity and body, while the S35 starts to feel a bit strained.

Room-Filling Capability

If you’re playing in a small space—say a bedroom or home office—the S35 will be fine. Its sound can fill a cozy room without distortion, and at moderate volume, it gives a pleasant experience. But if you move into a larger room, or you’re looking for something that can double as a living room centerpiece or family instrument, the S35 may struggle to keep up without external amplification.

The S55 easily fills medium-sized spaces, like open living rooms or music rooms. You can play for others without feeling like the sound is getting swallowed up by the room. This makes it better for casual performances, family playing, or anyone who doesn’t want to rely on headphones all the time.

Dynamic Range and Expressiveness

One of the subtler but important differences between these two models is how well they handle dynamic expression—the range between your softest and loudest playing.

The YDP-S35’s 8W speakers compress more easily, meaning if you play loud, the system runs out of headroom quickly. You’ll still hear the volume increase, but you lose tonal richness and subtle detail. This flattens the musicality a bit, especially in more dramatic or nuanced pieces.

The YDP-S55 has much more headroom thanks to its 20W speakers. You can play softly and it whispers; play hard and it roars. It responds more like a real piano. It gives your playing more life, range, and emotional impact, which is exactly what a piano should do.

Use with External Speakers

Neither piano includes line-out jacks, which is frustrating if you want to plug into an external sound system. You’ll have to use the headphone jack with a Y-cable, which works, but isn’t ideal for serious audio setups.

That said, the YDP-S35 almost needs external speakers for people who want a bigger sound. The YDP-S55 doesn’t. Its internal speakers are good enough that you likely won’t feel the need to upgrade unless you’re recording or performing.

Final Verdict on Speaker Systems

If you’re going to be playing mostly through headphones, the speaker system might not matter to you—but if you plan to play through the onboard speakers even occasionally, the difference between the S35 and S55 is impossible to ignore.

The YDP-S35 is fine for small rooms, beginner practice, or headphone-only use. But its 8W speakers are limited. It sounds good, but not great.
The YDP-S55 is clearly superior, with fuller tone, better bass, cleaner highs, and more volume headroom. It transforms the Yamaha CFX samples from “good digital piano” to something much closer to a true acoustic piano experience.

For most players, especially those who play without headphones, the S55’s speaker system alone may justify the price difference. It’s not just louder—it’s richer, deeper, and more emotionally responsive.

Functions and Features

At first glance, the Yamaha YDP-S35 and YDP-S55 might look like straightforward digital pianos—and to be fair, they are. These models don’t pretend to be feature-packed stage instruments or high-end synthesizers. But while they keep things simple, they still come with a decent spread of practical, musician-focused features that support learning, performance, and casual creativity.

If you’re trying to decide between the two, the truth is: most of their features are identical. However, that doesn’t mean there’s nothing to discuss—far from it. In this section, we’ll walk through what you get on both pianos, how well these features work in real-world use, and how they compare to other options in the same category.

Sound and Voice Selection

Both the YDP-S35 and YDP-S55 include 10 preset voices, which you can switch between using a combination of buttons and keys. These voices include:

3 Grand Pianos (Concert, Mellow, Pop)
2 Electric Pianos (DX-style and vintage)
Harpsichord
Vibraphone
Pipe Organ
Jazz Organ
Strings

Real-World Use:

The Concert Grand is the star and the most refined voice—it’s what 90% of people will use.
The Mellow Grand is great for softer playing, like ballads or nocturnes.
The Pop Grand has a brighter tone, useful in band settings or lighter pop tracks.
The E. Pianos are good enough for casual use, though not super deep. Think light jazz, soul, or 80s ballads.
The Strings voice is lush, though basic. It shines when layered under piano for a cinematic effect.
The Organs and Harpsichord feel a bit niche, but useful for specific classical or baroque pieces.

No customization or editing of these voices is available on the piano itself—you get what Yamaha provides. For more control, you’ll need to connect to the Smart Pianist app, which we’ll get to in a moment.

Reverb and Effects

Each model includes four types of reverb, simulating various acoustic spaces:

Recital Hall
Concert Hall
Chamber
Club

You can adjust the depth of the reverb to add ambiance, which helps when playing through headphones or when you want a more immersive sound. While the reverb options are subtle, they’re surprisingly musical. The concert hall reverb in particular gives the CFX sample some much-needed space to breathe.

There are no chorus, delay, or amp simulator effects—which is fine because these are not stage or synth-focused pianos.

Modes: Dual and Duo

These two modes offer basic sound layering and keyboard splitting:

Dual Mode (Layering)

You can layer two voices together, like Piano + Strings or Electric Piano + Vibraphone. This is a common technique to create richer, more expressive textures. It’s very useful for ballads, film music, or just experimenting.

The layering process is simple, though not super flexible—you can’t adjust the volume balance between voices directly on the piano. That level of control requires the Smart Pianist app.

Duo Mode (Partner Mode)

Duo Mode splits the keyboard into two identical ranges, which is incredibly useful for teaching and practice. You and another player can sit side by side with matching pitch zones—perfect for parent/child practice, student/teacher sessions, or duets.

This feature is especially appreciated by piano teachers or schools, and it’s a thoughtful inclusion on both models.

Recording and Playback

Each model includes a 2-track MIDI recorder, letting you:

Record one part (say, the right hand)
Then layer a second part over it (the left hand)

This is great for practicing hands separately, composing short ideas, or working on harmony and counterpoint.

However, this is MIDI-only recording, not audio. You’re capturing the performance data, not actual sound. To export audio recordings, you’d need to connect the piano to a computer or mobile device and record via USB or through the Smart Pianist app.

Also worth noting: internal memory is very limited. You can only store one recorded song at a time, so it’s more of a quick-practice tool than a composition workstation.

Metronome, Transpose, and Tuning

These are basic features, but still useful:

Metronome: Adjustable tempo and time signature. Great for building rhythm and timing skills.
Transpose: Useful if you need to shift a piece to a different key (helpful for singers).
Tuning Adjustment: Allows for fine tuning in small increments (useful for playing with other instruments).

These functions are accessed using key/button combinations—not a menu or screen—so there’s a small learning curve at first.

Smart Pianist App Compatibility

Both pianos are compatible with Yamaha’s Smart Pianist app (iOS/Android). This app adds a whole new layer of functionality:

Easy voice selection with visuals
Adjust reverb and other settings with sliders
Record and store performances (including audio recordings)
Display digital sheet music (including songs from your library)
Analyze audio files and create chord charts

To use it, you’ll need to connect your piano to a phone or tablet via USB to Host + adapter, or via Bluetooth MIDI (with an optional Yamaha BT-01 adapter—not built in).

In practice, Smart Pianist is one of Yamaha’s strongest tools, especially for players who want a touchscreen interface instead of remembering key/button combinations.

Verdict: If you plan to use the Smart Pianist app, both models work identically with it. The app effectively levels the playing field in terms of usability.

Pedal Functionality

Both the S35 and S55 come with three-pedal units (sustain, soft, and sostenuto) that are fixed and integrated into the stand.

Crucially, they support:

Half-damper response: Allows for more nuanced pedal control
Realistic feel: They resist like traditional piano pedals, not like plastic footswitches

This is a huge plus, especially for classical players who rely heavily on pedaling for color and expression.

Connectivity and Expansion

Here’s what both pianos offer:

USB to Host: Sends MIDI and audio data to your computer or mobile device
Dual Headphone Jacks: For silent practice and duet playing
No Line Out: You’ll need to use the headphone jack with an adapter if you want to connect to external speakers or an amp

Neither model includes:

Bluetooth Audio or MIDI built-in
USB Audio Playback (from flash drives)
Auxiliary Input

This means you won’t be able to play music through the piano’s speakers from your phone without external adapters.

Feature Verdict and Use Case Summary

Feature	YDP-S35	YDP-S55
Voice Count	10	10
Layering (Dual Mode)	Yes	Yes
Duo Mode	Yes	Yes
Recording	2-track MIDI	2-track MIDI
Smart Pianist App	Yes	Yes
Pedals	3 (with half-damper)	3 (with half-damper)
Bluetooth	No (optional adapter)	No (optional adapter)

What They’re Good For:

Practice and learning: Both models include everything a student or casual player needs.
Recording ideas: Basic MIDI recording is fine for sketches or review.
Performing casually: Limited features, but the essentials are here.
Teaching: Duo mode, dual headphone jacks, and Smart Pianist support make both models school- and studio-friendly.

Final Thoughts: Functions and Features

At the end of the day, the feature set is virtually identical between the YDP-S35 and YDP-S55. Yamaha keeps it simple, consistent, and user-focused.

These are instruments first, gadgets second. If you want built-in Bluetooth, tons of voices, or on-board multi-track recording, you’ll want to look at other models (like the Yamaha Clavinova or Roland HP series).

But if you value clean, focused tools that support actual piano playing, both models check the right boxes.

In terms of functionality alone, there’s no clear winner—but when paired with the better keyboard action and speaker system of the S55, the same features simply feel more premium.

Connectivity

In today’s world, connectivity is about more than just plugging in a pair of headphones. Whether you want to record your performance, use a learning app, connect to DAWs, or just play along with your favorite songs, how a digital piano interacts with other devices is crucial—especially if you plan to use it in a modern home or studio setup.

When it comes to the Yamaha YDP-S35 and YDP-S55, the connectivity options are fairly basic, and—spoiler alert—they’re identical. That’s both good and bad. Good because you don’t have to worry about choosing between them based on ports or digital compatibility. Bad because both models lack a few modern features that many players expect today, especially considering their price range.

Let’s unpack everything they offer—and what they don’t.

1. USB to Host (MIDI & Audio Interface)

Both the YDP-S35 and YDP-S55 include a USB to Host port on the back panel. This is your main gateway for connecting the piano to external devices such as:

Computers (Windows/macOS)
Tablets (iOS/Android)
Smartphones

Key Functions:

MIDI Transmission: The piano sends MIDI data (note on/off, velocity, etc.) to your computer or app. This is essential for using learning software like Flowkey, Simply Piano, or Yamaha’s own Smart Pianist app.
Audio Interface Function: This port also sends digital audio over USB. That means you can record high-quality, noise-free sound from the piano straight into your DAW (e.g., Logic Pro, Ableton, GarageBand) without needing a separate audio interface.

Real-World Use:

This is huge for songwriters, content creators, and students who want to record their playing cleanly. Whether you’re tracking a piano part or creating a backing track, USB audio simplifies your setup and ensures consistent quality.

Setup:

You’ll need a USB-B to USB-A or USB-C cable, depending on your device.
For iOS devices (like iPhones or iPads), you’ll need an adapter (e.g., Lightning to USB Camera Adapter or USB-C Hub).
No drivers are typically needed for macOS or iOS. Windows may require Yamaha’s USB driver.

Verdict:

✅ Very useful for recording and app integration.
❌ The USB port is rear-mounted, which means it’s a little inconvenient if you plug/unplug frequently.

2. Headphone Outputs (x2)

Both pianos come with two 1/4″ (6.35mm) stereo headphone jacks located under the keyboard on the front panel. This allows for:

Silent practice
Teacher/student duets
Playing without disturbing others
Using headphones instead of speakers for better clarity

Stereophonic Optimizer:

Yamaha includes this clever feature on both models. It creates a spatial simulation that mimics how a real acoustic piano sounds in a room—placing the piano “in front” of you instead of just inside your ears. This makes headphone practice more immersive and less fatiguing.

Real-World Use:

Dual jacks mean you can play with a friend or student silently. Teachers love this, especially in quiet classroom environments. The optimizer is subtle but effective.

Verdict:

✅ Front-mounted jacks are super convenient.
✅ Dual outputs are perfect for lessons and duets.

3. Smart Pianist App Integration

Both models work with Yamaha’s Smart Pianist app (available on iOS and Android). Through this app, you can:

Control voices and effects with a touchscreen interface
Record performances (audio or MIDI)
Load sheet music and chord charts
Customize piano settings (tuning, pedal depth, etc.)

How to Connect:

Via USB: Plug your device into the piano’s USB to Host port using the correct adapter.
Via Bluetooth (optional): Neither model includes Bluetooth out of the box, but you can add Bluetooth MIDI capability with a Yamaha UD-BT01 or MD-BT01 adapter.

This Bluetooth connection only handles MIDI data, not audio playback. You still can’t stream music from your phone through the piano speakers unless you use a wired workaround.

Verdict:

✅ Smart Pianist is very user-friendly and adds depth to both pianos.
❌ Requires external adapters for Bluetooth use.
❌ No native Bluetooth support—feels outdated in 2025.

4. No Line Out or Aux Out

Here’s one of the most frustrating omissions: neither the YDP-S35 nor the S55 has dedicated line outputs. That means:

You can’t connect them directly to external speakers, amps, or PA systems with standard line-level output.
Your only option is to use the headphone jack as a workaround (via a Y-cable or stereo TRS to dual TS or RCA cable).

This works, but:

It’s not ideal—headphone jacks are unbalanced and prone to signal loss or interference.
You have to manually adjust the master volume to get clean levels, since there’s no dedicated output control.
It’s a bit of a hacky solution for pianos in this price tier.

Use Cases Affected:

Live performance with external amplification
Home studio setups with studio monitors
Connecting to mixers or audio interfaces for better sound quality

For players who want their piano to double as a home performance instrument or recording rig, this is a real limitation.

5. No Aux Input or Bluetooth Audio

Want to play along with your favorite songs from Spotify or YouTube using the piano’s speakers? You’re out of luck. Neither model includes:

A 3.5mm aux input
Bluetooth audio streaming
Any other method to pipe audio through the speakers directly

Your only workaround is:

Using a portable speaker next to the piano
Playing through headphones with one earbud and one piano earcup (not great)
Connecting your phone’s output to a mixer that also handles the piano (a pain for casual use)

This is another example of Yamaha prioritizing a “pure” piano experience over modern convenience. But for many users—especially hobbyists—it feels like a miss.

6. Foot Pedal Input

Both models use a fixed, integrated 3-pedal system (sustain, soft, sostenuto) that connects via an internal cable. There’s no separate pedal input jack for third-party pedals, which means:

You can’t swap out the pedals
You can’t use a single portable sustain pedal (for gigging or transport)

This isn’t a problem for home users, but worth noting if you plan to move the piano often or if you’re used to external pedal setups.

7. MIDI via Bluetooth (Optional)

As mentioned earlier, you can add Bluetooth MIDI with Yamaha’s optional MD-BT01 (for iOS devices) or UD-BT01 (for USB-based MIDI). This gives you wireless MIDI connection to apps like:

Smart Pianist
GarageBand
Flowkey
Synthesia

But remember:

This only handles MIDI. No audio over Bluetooth.
These adapters aren’t cheap and add another device to manage.
Other brands (Roland, Casio) include Bluetooth in the unit by default at similar price points.

Connectivity Verdict

Feature	YDP-S35	YDP-S55
USB to Host (Audio + MIDI)	✅	✅
Bluetooth MIDI (Optional)	✅ via adapter	✅ via adapter
Bluetooth Audio	❌	❌
Line Out	❌	❌
Aux In	❌	❌
Dual Headphones	✅	✅
Smart Pianist Compatible	✅	✅

Summary:

✅ Good for learners and hobbyists who want to connect to apps or record via USB.
✅ Works well in digital teaching setups (Zoom, online lessons, MIDI tools).
❌ Limited for live performers—no line out makes external amplification awkward.
❌ Not ideal for playback or casual listening—no audio input or Bluetooth.
❌ Behind competitors in wireless tech—no built-in Bluetooth in 2025 is a letdown.

Final Thoughts

Connectivity is one of the few areas where the Yamaha YDP-S35 and S55 feel a bit behind the curve. They do what they need to for traditional players—record MIDI, connect to apps, and play quietly—but fall short for anyone wanting a modern, wireless, integrated setup.

For some players, this won’t matter. But if you’re the type who likes to play along with backing tracks, stream music, or interface with multiple pieces of gear, you’ll feel the limitations quickly.

If connectivity is a top priority, you might want to consider alternative models or add external gear (like a Bluetooth adapter, USB mixer, or interface) to get the full experience.

Pedals

Both models include a three-pedal unit that supports:

Sustain
Soft
Sostenuto

The pedals feel realistic and support half-damper functionality, which is important for expressive playing. There’s no difference between them in this area.

Verdict:

Equal—both get the job done and are better than the plastic foot-switches you get with entry-level keyboards.

Value for Money

When deciding between the Yamaha YDP-S35 and YDP-S55, one of the biggest considerations is how much piano you’re getting for your money. These models aren’t cheap in the broader digital piano market, but they’re far from top-tier luxury units. So the question becomes: Are the improvements in the S55 worth the extra cash? Or is the S35 the smarter buy for most people?

Let’s break it down in terms of price, performance, features, longevity, and player type.

Current Pricing (As of 2025)

YDP-S35: ~$1,100 USD
YDP-S55: ~$1,500 USD

That’s a $400 difference—not insignificant, especially for buyers who are budget-conscious or just starting out.

What You Get for the Price

YDP-S35 ($1,100 range)

This model gives you:

Yamaha’s top-tier CFX piano sample
Fully weighted GHS keyboard action
A slim, furniture-style cabinet
Dual headphone jacks
10 voices and Smart Pianist app compatibility
USB audio/MIDI for digital recording and app control

You’re getting a complete home digital piano with all the essentials:

It looks good
It feels decent
It sounds solid—especially through headphones
And it carries Yamaha’s reputation for reliability and support

For many beginner to intermediate players, this is everything they need to get started or stay engaged.

Bottom line: It’s a great value if you don’t need advanced touch, powerful speakers, or a traditional aesthetic.

YDP-S55 ($1,500 range)

For $400 more, you get:

Upgraded GH3 keyboard action (3-sensor, more responsive)
Synthetic ivory and ebony textured keys
Significantly improved 2x20W speaker system
Heavier, more traditional and premium cabinet

These upgrades directly impact how the piano plays, sounds, and feels. The GH3 action is a meaningful step up—it’s smoother, more expressive, and allows for faster note repetition. The keytops feel better under your fingers. The sound, through speakers, is significantly fuller and more dynamic.

If you plan to play daily, take lessons seriously, or use the built-in speakers regularly (instead of headphones), the difference is worth the cost.

Bottom line: The S55 is a better long-term investment if you want something closer to an acoustic piano without jumping to the Clavinova line.

Long-Term Value and Growth Potential

This is where the S55 starts to pull ahead.

The GHS action in the S35 is fine for beginners, but some intermediate players may find it limiting after a year or two. It’s also less durable over time if used heavily.

The GH3 action in the S55 is more suitable for players progressing through classical pieces, dynamic repertoire, or exam-level work. If you’re planning to stick with piano beyond the basics, you won’t outgrow the S55 nearly as quickly.

In other words:

The S35 may serve you for 2–3 years before you start wanting more.
The S55 could easily keep you happy for 5–10 years, depending on your level and goals.

So while the upfront cost is higher, the per-year value could be better with the S55 if you play regularly.

Which One Offers Better Value for Whom?

YDP-S35 Is Best For:

Beginners and casual players on a budget
People who mostly play with headphones
Apartment dwellers needing a compact instrument
Parents buying a first piano for a child
Hobbyists who don’t need “real piano” action or performance-grade sound

YDP-S55 Is Best For:

Serious students who want realistic key feel and expressive control
Intermediate players looking for something closer to an acoustic upright
Anyone who practices or performs regularly using onboard speakers
Players looking for a digital piano that will last a decade
People who care about cabinet quality, feel, and presence in their home

Final Verdict: Which One Is the Better Deal?

If you’re just starting out, or you’re watching your budget closely, the YDP-S35 is a very good value. It checks the core boxes: solid piano sound, Yamaha reliability, headphone practice, and slim form factor. You won’t feel shortchanged unless your playing level outpaces it.

But if you’re investing in a piano you’ll keep for years, and you value how the instrument feels and sounds out loud, the YDP-S55 justifies the extra spend. It’s not just “more”—it’s better in the ways that actually affect your musical experience.

In short:

Best budget choice: YDP-S35
Best long-term value: YDP-S55

Other Considerations

Beyond specs and sound, a few practical aspects might influence your decision—especially if you’re thinking about how the piano will fit into your everyday life, your space, and your long-term plans.

Portability and Weight

The YDP-S35 is lighter and slimmer, weighing around 79 lbs (36 kg) fully assembled. It’s easier to move within a home—great if you rearrange your space frequently or might need to transport it between rooms or locations. Its compact footprint also fits comfortably into smaller apartments or bedrooms.

The YDP-S55 is heavier at 92.6 lbs (42 kg) and has a deeper cabinet, making it feel more permanent. It’s a better fit for a dedicated music space or living room, but not ideal if you plan to move it often.

Assembly Experience

Both pianos require home assembly. It’s not complicated, but the S35 is easier to put together due to its lighter components. The S55’s extra weight and deeper body make it a two-person job for safety and ease.

Maintenance and Reliability

Digital pianos like the YDP-S35 and S55 require minimal maintenance. You don’t need to tune them, and Yamaha’s build quality means they’ll likely last for many years with basic care. Keep them dust-free, avoid extreme temperatures, and use a power surge protector.

Resale and Longevity

The S55 holds value better thanks to its premium action and cabinet quality. If you ever plan to sell or upgrade, it will likely command a better secondhand price. That makes it a smart pick if you view this as a long-term purchase rather than a short-term tool.

Final Verdict: Which One Should You Buy?

Item: Yamaha YDP-S35 vs Yamaha YDP-S55
Author: Eliza Brooklyn

Choose the Yamaha YDP-S35 if:

You’re a beginner and want something reliable without spending too much
Space is tight in your home or apartment
You’ll mostly play with headphones
You want Yamaha quality without unnecessary extras

Choose the Yamaha YDP-S55 if:

You’re a progressing pianist who values feel and sound
You want your piano to look and feel more like a traditional acoustic
You care about better speakers and more realistic keyboard action
You’re planning to stick with piano for the long haul

Bottom Line

Both the YDP-S35 and YDP-S55 are good digital pianos. They share a lot under the hood, but they’re aimed at slightly different players.

If you’re just starting out or upgrading from a beginner keyboard, the S35 offers excellent value. But if you’re serious about piano, the S55 gives you a better experience that could last for years.

Your budget and your priorities will decide this one.

Want the best bang for your buck? Go S35.
Want the best overall playing experience? Go S55.