Yamaha
YDP-175
$2,000
Arius flagship with Clavinova-grade sound engine
10.0 Beginner 8.5 Night Practice 1.5 Portability 8.8 Touch Reality 7.1 Value
88 48 kg
Casio
Casio AP-S450 Review
A slim Celviano with hybrid keys, Bluetooth, and a serious four-speaker system
88 Keys 37.6 kg smart hybrid hammer action celviano
Bluetooth
Intermediate
MSRP
$2,399
Price last checked: 5/7/2026
Source: Manufacturer (2026-05-07)
No verified product page is available yet, so these buttons open retailer search results. Stock and listing status can change without notice.
Scores
How These Scores Were Calculated
Beginner
10.0| Factor | This Piano | Points |
|---|---|---|
| Base Score | — | 3.0 |
| Lesson Function | Yes | +1.5 |
| App Connectivity | Yes | +1.5 |
| Recording | Yes | +1 |
| Metronome | Yes | +0.5 |
| Transpose | Yes | +0.3 |
| Layer / Split | Yes | +0.3 |
| Preset Songs | 60 | +1.5 |
| Sound Variety | 26 sounds | +0.5 |
Night Practice
8.0| Factor | This Piano | Points |
|---|---|---|
| Base Score | — | 2.0 |
| Headphone Jacks | 2 | +2 |
| Headphone Type | 6.3mm, 6.3mm | +1 |
| Headphone Optimization | Yes | +1.5 |
| Key Action Quietness | smart hybrid hammer action celviano | +0 |
| Volume Control | Yes | +1 |
| Bluetooth Audio | Yes | +0.5 |
Portability
3.0| Factor | This Piano | Points |
|---|---|---|
| Base Score | — | 5.0 |
| Weight | 37.6 kg | -1.5 |
| Width | 1393 mm | -0.5 |
| Battery | No | +0 |
| Foldable | No | +0 |
| Key Count | 88 keys | +0 |
Touch Reality
8.8| Factor | This Piano | Points |
|---|---|---|
| Key Action Quality | smart hybrid hammer action celviano (grade 8) | +4.8 |
| Key Count | 88 keys | +1.5 |
| Polyphony | 256 notes | +1.5 |
| Sound Modeling | Multi Dimensional Morphing AiR | +0.5 |
| Key Surface | simulated-ebony-ivory | +0.5 |
Our Verdict
The AP-S450 is Casio's slim Celviano for homes that want a real console piano experience without a deep cabinet: 88 Smart Hybrid Hammer Action Celviano Edition keys, 256-note polyphony, 26 tones, 40 watts of four-speaker sound, Bluetooth audio and MIDI through the included WU-BT10 adapter, and the Visual Information Bar from the newer AP generation.
Pros
- • Slim 299 mm cabinet depth fits apartments, bedrooms, and shared living spaces much more easily than traditional consoles
- • Smart Hybrid Hammer Action Celviano Edition gives it a more substantial touch than entry models with Smart Scaled Hammer Action
- • 256-note polyphony, resonance modeling, and continuously variable damper pedal support expressive intermediate practice
- • 40W four-speaker system is strong for a slim cabinet and works well for home listening without external speakers
- • Bluetooth audio and MIDI adapter is included, so Casio Music Space and play-along use are available out of the box
- • Visual Information Bar and Instant RePlayer are useful practice tools for students who need feedback on timing, touch, and pedal use
- • Soft-close sliding key cover and fixed three-pedal unit make it feel like a permanent piano, not a portable keyboard
Cons
- • No dedicated line outputs, unlike the AP-750, so external audio routing is more limited
- • Bench is not consistently bundled in all markets, so buyers may need to budget for a separate bench
- • Bluetooth still relies on the WU-BT10 adapter rather than a fully hidden internal radio
- • The slim cabinet gives less physical presence than a deeper console such as the AP-550 or AP-750
- • Current street price competes with strong Kawai CN, Roland F/HP, and Yamaha YDP/CLP alternatives
The AP-S450 is one of Casio's most practical current Celviano models. It brings the newer AP generation's hybrid keys, Visual Information Bar, Instant RePlayer, Bluetooth adapter, and stronger sound system into a shallow cabinet that many homes can actually place. It is not the flagship, and the lack of line outputs matters for recording or PA use. But for a living-room or apartment piano where depth, design, and a serious touch all matter, the AP-S450 fills an important gap between the entry AP-S200 and the larger AP-550/AP-750.
Technical Deep Dive
About the Key Action
The Smart Hybrid Hammer Action Celviano Edition is a meaningful step above Casio's simpler Smart Scaled Hammer Action. The wood-and-resin key structure, graded hammer response, and textured surfaces are intended to feel more like a regulated home piano action while keeping the cabinet slim enough for modern rooms.
Who Is This Piano For?
Choose the AP-S450 if you want a modern home piano but cannot give up the floor space for a deeper cabinet. It is a strong fit for apartment dwellers, returning adults, and intermediate students who care about touch, speakers, and Bluetooth but still want a slim, clean-looking instrument. It is also the Casio to compare when the AP-S200 feels too entry-level but the AP-750 is too large or expensive.
Demo Video
Video coming soon for this model
We embed videos from manufacturer official channels and trusted reviewers. As soon as a suitable demo or review is available, it will appear here.
Specifications
| Keys | 88 |
| Key Action | Smart Hybrid Hammer Action Celviano |
| Polyphony | 256 notes |
| Sounds | 26 |
| Weight | 37.6 kg |
| Speakers | 40W (×4) |
| Bluetooth | Audio + MIDI |
| Key Surface | Simulated Ebony Ivory |
| Sound Modeling | Multi Dimensional Morphing AiR |
| Headphone Jacks | 2 |
| Headphone Type | 6.3mm, 6.3mm |
| Headphone Optimization | Yes |
| USB MIDI | Yes |
| Line Out | No |
| Lesson Function | Yes |
| App Connectivity | Yes |
| Recording | Yes |
| Metronome | Yes |
| Transpose | Yes |
| Layer / Split | Yes |
| Preset Songs | 60 |
| Battery | No |
| Foldable | No |
| Dimensions (W×D×H) | 1393×299×866 mm |
| Stand Included | Yes |
| Pedal Included | Yes |
Recommended Accessories
🪑
Stand
Stand included
A sturdy X-stand or furniture-style stand is essential if one isn't included.
🎧
Headphones
Closed-back headphones with good bass response make practice sessions more enjoyable.
🎹
Sustain Pedal
The included pedal is usually basic. A half-damper pedal upgrade is worthwhile for expressive playing.
💺
Bench
An adjustable-height bench helps maintain proper posture during long practice sessions.
Where to Buy
Casio AP-S450 $2,399
No verified product page is available yet, so these buttons open retailer search results. Stock and listing status can change without notice.
How It Compares
AP-S450 vs YDP-175
The AP-S450 scores higher in Portability, while the YDP-175 edges ahead in Night Practice. The YDP-175 costs $399 less. Choose the AP-S450 if you prioritize portability.
Yamaha YDP-175 →AP-S450 vs CLP-735
The AP-S450 scores higher in Portability, while the CLP-735 edges ahead in Night Practice. The CLP-735 costs $199 less. Choose the AP-S450 if you prioritize portability.
Yamaha CLP-735 →AP-S450 vs CLP-725
The AP-S450 scores higher in Portability, while the CLP-725 edges ahead in Night Practice. The CLP-725 costs $699 less. Choose the AP-S450 if you prioritize portability.
Yamaha CLP-725 →Frequently Asked Questions
Is the Casio AP-S450 good for beginners?
Yes. The Casio AP-S450 scores 10/10 on our Beginner scale, which means it has strong learning features like lesson modes, app connectivity, and built-in songs to help new players get started.
Does the Casio AP-S450 have Bluetooth?
Yes, the Casio AP-S450 supports both Bluetooth MIDI and Bluetooth Audio, so you can connect wirelessly to apps and stream audio.
How heavy is the Casio AP-S450?
The Casio AP-S450 weighs 37.6 kg (83 lbs). It scores 3/10 on our Portability scale. This is a stay-in-place instrument — plan its location before setup.
Can I use headphones with the Casio AP-S450?
Yes. The Casio AP-S450 has 2 headphone jacks (6.3mm, 6.3mm). It scores 8/10 on our Night Practice scale. It also features headphone sound optimization for a more immersive experience.
How many keys does the Casio AP-S450 have?
The Casio AP-S450 has a full 88-key keyboard, the same as an acoustic piano. This gives you the complete range for any piece of music.
Who is the Casio AP-S450 best for?
Choose the AP-S450 if you want a modern home piano but cannot give up the floor space for a deeper cabinet. It is a strong fit for apartment dwellers, returning adults, and intermediate students who care about touch, speakers, and Bluetooth but still want a slim, clean-looking instrument. It is also the Casio to compare when the AP-S200 feels too entry-level but the AP-750 is too large or expensive.
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Read more →Similar Pianos
Yamaha
CLP-735
$2,200
Same action as the CLP-725, but with speakers that actually fill the room
10.0 Beginner 8.5 Night Practice 1.5 Portability 8.8 Touch Reality 7.0 Value
88 60 kg
Yamaha
CLP-725
$1,700
The entry point to Yamaha's Clavinova legacy — real piano tone without the tuning bills
10.0 Beginner 8.5 Night Practice 1.5 Portability 8.8 Touch Reality 7.3 Value
88 57 kg