Kurzweil
KA90
$400
Kurzweil sound quality in a beginner-friendly portable
8.6 Beginner 5.5 Night Practice 4.5 Portability 5.3 Touch Reality 6.7 Value
88 13.5 kg
View Details Williams
Williams Allegro IV Review
Guitar Center's house brand delivers a no-frills hammer-action piano at $400
88 Keys 14 kg hammer action Beginner
Scores
How These Scores Were Calculated
Beginner
8.4| 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 | 10 sounds | +0.3 |
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 | hammer action | +0.5 |
| Volume Control | Yes | +1 |
| Bluetooth Audio | No | +0 |
Portability
4.5| Factor | This Piano | Points |
|---|---|---|
| Base Score | — | 5.0 |
| Weight | 14 kg | +0 |
| Width | 1340 mm | -0.5 |
| Battery | No | +0 |
| Foldable | No | +0 |
| Key Count | 88 keys | +0 |
Touch Reality
5.7| Factor | This Piano | Points |
|---|---|---|
| Key Action Quality | hammer action (grade 5) | +3 |
| Key Count | 88 keys | +1.5 |
| Polyphony | 192 notes | +1.2 |
| Sound Modeling | No | +0 |
| Key Surface | Standard | +0 |
Our Verdict
The Allegro IV strips piano down to basics: 88 hammer-action keys, 192-note polyphony, 10 sounds, and nothing else to distract you. It's simple, affordable, and sold almost exclusively through Guitar Center.
Pros
- • Hammer action with proper weight graduation — a real piano feel at $400
- • 192-note polyphony — generous for the price, handles pedal-heavy playing well
- • Built-in lesson function with 50 preset songs for guided practice
- • Recording function to capture and review your playing
- • 20W speakers — adequate for home practice without external equipment
- • Line out jacks for connecting to an amp or audio interface
Cons
- • Only 10 sounds — the bare minimum, with nothing beyond basic keyboards
- • No Bluetooth — cannot connect to apps or stream audio wirelessly
- • No app connectivity — limited to the built-in features only
- • Williams is Guitar Center's in-house brand — limited availability outside the US and harder to find reviews
- • No headphone optimization — headphone sound is unprocessed
The Allegro IV is a no-nonsense budget piano. With only 10 sounds and zero smart features, it won't impress anyone looking at spec sheets. But it has the one thing that matters most at this price: a real hammer-action keyboard with 88 keys. The 192-note polyphony is a nice bonus that prevents note dropout when you start using the sustain pedal. If you're in the US and buying at Guitar Center, the Allegro IV is a sensible, boring-in-a-good-way choice that gets the fundamentals right.
Technical Deep Dive
About the Key Action
The hammer action is the Allegro IV's reason to exist. At $400, getting genuine hammer-weighted keys (not semi-weighted, not spring-loaded) puts it ahead of many budget competitors that cut corners on the keybed. The weight graduation from bass to treble is present, though the overall feel is stiffer and less refined than Yamaha's GHS or Casio's Scaled Hammer Action. It teaches proper finger weight, which is what matters for a beginner.
Who Is This Piano For?
You're at Guitar Center, you have $400, and you want a piano with real weighted keys — not a keyboard that feels like a toy. You don't care about 200 sounds or Bluetooth; you want to sit down, plug in headphones, and practice. The Allegro IV is the simplest path from 'I want to learn piano' to actually playing one.
Specifications
| Keys | 88 |
| Key Action | Hammer Action |
| Polyphony | 192 notes |
| Sounds | 10 |
| Weight | 14 kg |
| Speakers | 20W (×2) |
| Bluetooth | No |
| Key Surface | — |
| 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) | 1340×350×130 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
Allegro IV vs Prestige
The Prestige edges ahead in Touch Reality. The Allegro IV costs $100 less. Choose the Prestige if you prioritize realistic touch.
Alesis Prestige →Allegro IV vs SP4200
The SP4200 edges ahead in Night Practice. Choose the SP4200 if you prioritize quiet practice.
Medeli SP4200 →Frequently Asked Questions
Is the Williams Allegro IV good for beginners?
Yes. The Williams Allegro IV scores 8.4/10 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 Williams Allegro IV have Bluetooth?
No, the Williams Allegro IV does not have Bluetooth. You'll need a USB cable for app connectivity.
How heavy is the Williams Allegro IV?
The Williams Allegro IV weighs 14 kg (31 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 Williams Allegro IV?
Yes. The Williams Allegro IV has 1 headphone jack (6.3mm). It scores 5.5/10 on our Night Practice scale.
How many keys does the Williams Allegro IV have?
The Williams Allegro IV has a full 88-key keyboard, the same as an acoustic piano. This gives you the complete range for any piece of music.
Related Guides
Best Digital Pianos for Seniors & Older Adults (2026)
Choosing a digital piano in your 50s, 60s, or 70s is different from buying one at 25. You may want a more comfortable key action that's easier on aging joints, a display you can read without squinting, and built-in lessons that let you learn at your own pace. This guide covers exactly that.
Read more →Best Digital Pianos Under $1,000 (2026)
The $500–$1,000 range is where digital pianos get genuinely good. This is the sweet spot — where key actions start to feel convincing, speakers become room-filling, and you get features that actually matter for your progress. If you can stretch your budget to this range, you'll get an instrument that can carry you from your first lesson through years of playing.
Read more →Best Digital Pianos Under $500 (2026)
You don't need to spend a fortune to start playing piano. Under $500, there are genuinely good instruments that will serve a beginner well for years. But at this price, trade-offs are real — and knowing what to prioritize makes all the difference. This guide breaks down exactly what you can expect, what to look for, and which models deliver the most value.
Read more →Best Portable Digital Pianos for Travel & Small Spaces (2026)
Sometimes you need a piano that goes where you go. Whether you're gigging, traveling, teaching at multiple locations, or simply don't have room for a full console, portability matters. But lighter doesn't always mean better — the trade-offs between weight, key quality, and features are real. This guide breaks down exactly what to look for in a portable digital piano.
Read more →Digital Piano Buying Guide: Everything You Need to Know (2026)
Buying a digital piano can feel overwhelming. Hundreds of models, confusing specs, and marketing jargon make it hard to know what actually matters. This guide breaks down everything you need to understand — in plain language — so you can make a confident decision.
Read more →Digital Piano vs Keyboard — What's the Difference? (2026)
"Should I buy a digital piano or a keyboard?" It's the most common question beginners ask — and the most confusing, because the terms get used interchangeably even by music stores. They're actually quite different instruments designed for different purposes. This guide cuts through the marketing noise and explains exactly what separates them, when each one makes sense, and which you should buy based on your actual goals.
Read more →Graded Hammer Action vs Weighted Keys: What's the Difference?
"Weighted keys" and "graded hammer action" are two of the most common terms you'll see when shopping for a digital piano. They sound similar but refer to different things. This guide explains exactly what they mean, how they affect your playing, and which type you should look for.
Read more →Best Quiet Digital Pianos for Apartments (2026)
Living in an apartment doesn't mean giving up piano. Digital pianos were practically made for this situation — plug in headphones and the world disappears. But not all models are equally quiet. Key noise, headphone quality, and late-night optimization features vary widely. This guide helps you find the right piano for peaceful apartment practice.
Read more →Similar Pianos
Alesis
Prestige
$500
256-note polyphony and ivory-feel keys for $500 — the spec sheet champion
8.6 Beginner 5.5 Night Practice 4.5 Portability 6.5 Touch Reality 6.5 Value
88 13.6 kg
View Details 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