The arranger that survives the first year · review
The 76-key version of the same idea, with a bigger speaker system: 2 × 6.5 W instead of 2 × 2.5 W. Still no accompaniment styles, still 61 sounds, and 80 cm (31.5 in) longer in the room.
What it amounts to The 76-key middle path, with speakers that actually fill a room.
This is the CT-S1 with fifteen more keys and a speaker system with more than twice the power, and those are the only differences that matter.
Seventy-six keys is a deliberate middle ground. It covers the great majority of piano repertoire that runs off the end of a 61-key board, without committing to the length, weight and price of an 88-key weighted instrument. At 5.3 kg (11.7 lb) it is still portable in a way a hammer-action piano never is.
The rest is unchanged: 61 sounds from the AiX engine, no accompaniment styles, USB-to-Host, headphone socket, audio input and a pedal socket with no pedal supplied. The music rest and power adapter are included.
The practical warning is length. At 1.14 m (4 ft) it needs a stand or a desk that can take it, and that is worth measuring before it arrives rather than after.
| Keys | 76, touch-sensitive |
|---|---|
| Sounds | 61 from the AiX sound source |
| Accompaniment | None — Casio states there is no auto-accompaniment |
| Speakers | 2 × 6.5 W |
| Connections | USB-to-Host, headphone, audio in, pedal socket |
| In the box | Music rest and power adapter — pedal not included |
| Dimensions and weight | 1,140 × 258 × 83 mm (44.9 × 10.2 × 3.27 in) · 5.3 kg |
| Amazon reference | B0D78LP87Y (identical on 6 markets) |
| EAN | 4971850315247 |
Sixty-one covers most pop and beginner material; 76 covers nearly all of it; 88 is the full piano range. The other difference is weight and length — this 76-key model is 1.14 m (4 ft) and 5.3 kg (11.7 lb), where an 88-key weighted piano is heavier still.
At 2 × 6.5 W it is more than double the 61-key model. In headphones it changes nothing; in a room, it is the difference between a keyboard you hear and one you lean towards.
8.4/ 10
The 76-key middle path, with speakers that actually fill a room.
Shown because the accessory names this instrument itself.
A reference exists on these Amazon stores: France, Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.
Details checked on August 18, 2026.
A player who has run out of keys on a 61 but does not want an 88-key weighted piano.
Specifications: the manufacturer sheet for musical instruments and gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
61 touch-sensitive keys · 61 sounds · no auto-accompaniment
A keyboard built like a piano rather than like an arranger: 61 touch-sensitive keys, 61 sounds, and deliberately no accompaniment styles. Music rest and power adapter are included; the pedal is not.
Best for: Someone who wants piano sounds and 61 keys without an arranger’s menus.
≈ $560
61 keys · microphone output and a built-in microphone · 100 tones · 4 AA batteries
The least expensive keyboard on this shelf by a wide margin, and the only one that records a voice — a microphone output and a built-in microphone — with 100 tones, eight percussion panels and battery operation.
Best for: A child learning at a desk, where a microphone and a set of batteries matter more than a published key size.
61 touch-sensitive keys · 650 sounds · 260 styles · 48-note polyphony
The arranger answer to the Casio: 650 sounds, 260 accompaniment styles, 48-note polyphony and a structured lesson system with 125 built-in songs.
Best for: A beginner who wants to play songs with accompaniment from the first week.
