Williams
Allegro IV
$400
Guitar Center's house brand delivers a no-frills hammer-action piano at $400
8.4 Beginner 5.5 Night Practice 4.5 Portability 5.7 Touch Reality 6.7 Value
88 14 kg
View Details Kurzweil
Kurzweil KA90 Review
Kurzweil sound quality in a beginner-friendly portable
88 Keys 13.5 kg graded hammer action Beginner
Scores
How These Scores Were Calculated
Beginner
8.6| Factor | This Piano | Points |
|---|---|---|
| Base Score | — | 3.0 |
| Lesson Function | Yes | +1.5 |
| App Connectivity | No | +0 |
| Recording | Yes | +1 |
| Metronome | Yes | +0.5 |
| Transpose | Yes | +0.3 |
| Layer / Split | Yes | +0.3 |
| Preset Songs | 50 | +1.5 |
| Sound Variety | 20 sounds | +0.5 |
Night Practice
5.5| Factor | This Piano | Points |
|---|---|---|
| Base Score | — | 2.0 |
| Headphone Jacks | 1 | +1 |
| Headphone Type | 6.3mm | +1 |
| Headphone Optimization | No | +0 |
| Key Action Quietness | graded hammer action | +0.5 |
| Volume Control | Yes | +1 |
| Bluetooth Audio | No | +0 |
Portability
4.5| Factor | This Piano | Points |
|---|---|---|
| Base Score | — | 5.0 |
| Weight | 13.5 kg | +0 |
| Width | 1340 mm | -0.5 |
| Battery | No | +0 |
| Foldable | No | +0 |
| Key Count | 88 keys | +0 |
Touch Reality
5.3| Factor | This Piano | Points |
|---|---|---|
| Key Action Quality | graded hammer action (grade 5) | +3 |
| Key Count | 88 keys | +1.5 |
| Polyphony | 128 notes | +0.8 |
| Sound Modeling | No | +0 |
| Key Surface | plastic | +0 |
Our Verdict
The Kurzweil KA90 brings the company's acclaimed sound engine to the beginner market — a portable with lesson functions, 30W speakers, and piano tones that punch far above the typical budget level.
Pros
- • Kurzweil piano sounds — noticeably superior to most budget competitors
- • 30W speakers deliver powerful, room-filling audio
- • Lesson function with 50 preset songs for structured learning
- • 128-note polyphony handles pedal-heavy playing without dropout
- • Recording capability and layer/split modes add versatility
- • USB MIDI for computer integration
Cons
- • No Bluetooth connectivity
- • No app connectivity for modern learning platforms
- • Only 20 built-in sounds
- • Plastic key surface without premium coating
- • Stand not included — additional purchase required
The Kurzweil KA90 is the sleeper pick in the budget portable category. While Yamaha and Casio dominate the conversation, the KA90 quietly offers piano sounds that are arguably better than either brand at this price. The 30W speakers are a genuine strength, making practice sessions more enjoyable and inspiring. The lack of Bluetooth and app support keeps it from being a perfect modern beginner piano, but for someone who values pure sound quality over wireless convenience, the KA90 deserves serious consideration. Factor in the cost of a stand, and you still have one of the best-sounding portable pianos under $500.
Technical Deep Dive
About the Key Action
The KA90 features a graded hammer action with plastic keys. The grading is well-calibrated, providing a natural transition from the heavier bass to the lighter treble. The action has a slightly lighter overall feel compared to Yamaha's GHS, which some beginners may actually prefer as it reduces finger fatigue during longer practice sessions. The key return speed is good, allowing for reasonable repetition speed. The plastic surface is standard for this price point. Overall, the action is honest and functional — it will teach you proper technique without fighting you, even if it does not pretend to be a grand piano.
Who Is This Piano For?
The KA90 is for the beginner who cares about sound quality above all else. While most budget portables offer similar features, the KA90 stands apart with Kurzweil's piano sound engine — the same fundamental technology that powers instruments used by professional pianists and recording studios worldwide. If you want your practice sessions to sound genuinely musical from day one, the KA90 delivers that experience. The 30W speakers are powerful enough to fill a room without distortion, and the lesson function provides basic guided practice. It does not have Bluetooth or app support, which is a notable omission in 2025, but the core experience — sitting down and playing through great speakers — is where the KA90 excels. A hidden gem for the discerning beginner.
Specifications
| Keys | 88 |
| Key Action | Graded Hammer Action |
| Polyphony | 128 notes |
| Sounds | 20 |
| Weight | 13.5 kg |
| Speakers | 30W (×2) |
| Bluetooth | No |
| Key Surface | Plastic |
| Sound Modeling | — |
| Headphone Jacks | 1 |
| Headphone Type | 6.3mm |
| Headphone Optimization | No |
| USB MIDI | Yes |
| Line Out | Yes |
| Lesson Function | Yes |
| App Connectivity | No |
| Recording | Yes |
| Metronome | Yes |
| Transpose | Yes |
| Layer / Split | Yes |
| Preset Songs | 50 |
| Battery | No |
| Foldable | No |
| Dimensions (W×D×H) | 1340×340×120 mm |
| Stand Included | No |
| Pedal Included | Yes |
Recommended Accessories
🪑
Stand
Stand not included (sold separately)
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.
How It Compares
KA90 vs Allegro IV
The KA90 and Allegro IV score very similarly across all axes.
Williams Allegro IV →KA90 vs SP4200
The SP4200 edges ahead in Night Practice. Choose the SP4200 if you prioritize quiet practice.
Medeli SP4200 →KA90 vs KA-120
The KA-120 edges ahead in Portability. The KA90 costs $100 less. Choose the KA-120 if you prioritize portability.
Kurzweil KA-120 →Frequently Asked Questions
Is the Kurzweil KA90 good for beginners?
Yes. The Kurzweil KA90 scores 8.6/10 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 Kurzweil KA90 have Bluetooth?
No, the Kurzweil KA90 does not have Bluetooth. You'll need a USB cable for app connectivity.
How heavy is the Kurzweil KA90?
The Kurzweil KA90 weighs 13.5 kg (30 lbs). It scores 4.5/10 on our Portability scale. This is manageable for occasional moves but not truly portable.
Can I use headphones with the Kurzweil KA90?
Yes. The Kurzweil KA90 has 1 headphone jack (6.3mm). It scores 5.5/10 on our Night Practice scale.
How many keys does the Kurzweil KA90 have?
The Kurzweil KA90 has a full 88-key keyboard, the same as an acoustic piano. This gives you the complete range for any piece of music.
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Read more →Similar Pianos
Medeli
SP4200
$350
600 sounds and Bluetooth audio in a budget portable
8.6 Beginner 6.0 Night Practice 4.5 Portability 5.3 Touch Reality 7.1 Value
88 12.5 kg
View Details Kurzweil
KA-120
$500
A pro brand's budget piano — Kurzweil quality at $500
8.6 Beginner 5.5 Night Practice 5.5 Portability 5.3 Touch Reality 6.5 Value
88 12 kg
View Details