Digital Pianos Review

Korg C1 Air Review: RH3 in a Slim Console With Bluetooth Audio

The C1 Air is Korg's slim console with the flagship RH3 action, 30 sounds, split and layer, built-in speakers, three pedals and a Bluetooth audio receiver for play-along music. This review covers what the listing confirms, how it differs from the LP-380U, and how it compares with the Roland F107 and Yamaha YDP-S56.

M Mandrillis Team • Last updated: Oct 18, 2026 • 11 min read • Specs Verified

Our Verdict

Research Score 85/100

The Korg C1 Air is the console to buy if you want the RH3 action with Bluetooth audio in a slim cabinet. The action is the best in its price class, Korg's grands and electric pianos are strong, and wireless play-along is a real convenience. Bluetooth is audio only, polyphony is 120 notes per Korg, and the listing does not publish speaker power or weight; the Roland F107 competes with escapement and Bluetooth MIDI.

Editorial research score based on published specifications and documented features, not a customer rating or lab test.

Korg

Korg C1 Air

Best for: Pianists who want the LP-380U's action with Bluetooth audio for play-along

Skip it if: you want Bluetooth MIDI or 192-note or higher polyphony

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Listing verified: October 2026

Who Should Buy It

Buy it if

You want RH3 and wireless play-along in a slim console
Thirty sounds with Korg's grands and electric pianos suit you
The room needs a shallow cabinet

Skip it if

Apps over Bluetooth MIDI matter; the C1 Air is audio only
You layer heavily and need more polyphony
You want documented speaker power

Key Specifications

Key Action	RH3 (Real Weighted Hammer Action 3)
Sound Engine	Korg stereo piano samples
Voices	30
Polyphony	120 notes per Korg
Speakers	Built-in stereo
Bluetooth	Audio receiver
USB	USB MIDI per Korg
Pedals	3 pedals built in
Weight	Not published in listing
Form Factor	Slim console

C1 Air and LP-380U

Korg offers two slim consoles with the RH3 action. The LP-380U has 2 x 22 W speakers, a USB MIDI port and no Bluetooth; the C1 Air, confirmed on the listing, has 30 sounds, split and layer, built-in speakers and a Bluetooth audio receiver. Korg's documentation adds the RH3 action, 120-note polyphony, three pedals and USB MIDI. The listing publishes no weight or speaker wattage.

RH3 Action

RH3 is Korg's flagship action, graded in four zones with a heavy, substantial feel, long keys and quick repetition, and it is the same keyboard as the LP-380U, D1 and Grandstage. It has no let-off and plain key tops. Against the Roland F107's PHA-4 Standard it is heavier and lacks escapement; against the Yamaha YDP-S56's GrandTouch-E it is comparable in weight. For a student building strength it is a strong choice.

Sound and Bluetooth

Thirty sounds include Korg's German and Italian grands, an upright, excellent electric pianos, organs, strings and more, with split and layer modes. Polyphony is 120 notes per Korg, enough for most solo repertoire and short of Roland's and Yamaha's figures for heavy layering. The Bluetooth audio receiver streams a phone's music through the piano's speakers for play-along practice; MIDI over Bluetooth is not included.

Worth knowing: Bluetooth on the C1 Air is a receiver for audio only. Apps connect over the USB MIDI port with a cable.

Connectivity and Speakers

USB MIDI, a line output, a line input and two headphone jacks cover home use. The built-in speakers are not described on the listing; Korg's documentation gives 2 x 25 W for the C1 Air, which would make it louder than most slim consoles, but confirm before relying on it.

Cabinet and Assembly

The C1 Air is a slim console with a folding cover in black, white or brown, assembled in under an hour with two people. Weight is not published. No bench is included.

Daily Use

Owners use the C1 Air as a practice piano with a phone streaming backing tracks over Bluetooth, and the RH3 action for scales and repertoire. Partner mode splits the keyboard for teacher and student, two headphone jacks allow silent practice, and the panel's button-per-function design makes it simple to operate. Through the speakers it is strong enough for a living room if Korg's figure holds.

C1 Air Against the Alternatives

Against the LP-380U, the C1 Air adds Bluetooth audio and a different cabinet; the LP-380U documents its 2 x 22 W speakers. Against the Roland F107, the Roland has escapement, Bluetooth MIDI and 256-note polyphony; the Korg has the heavier action. Against the Yamaha YDP-S56, the Yamaha has the CFX sample and Bluetooth audio and MIDI; the Korg has 30 sounds and the heavier keys.

Buy the C1 Air for RH3 with wireless play-along in a slim console.

Practice Features and Apps

Partner mode splits the keyboard into two identical ranges for teacher and student, a metronome and a two-track recorder are a button away, and the thirty sounds layer and split for variety. Korg's apps connect over the USB MIDI port with a cable, and the Bluetooth audio receiver streams a phone's music through the speakers for play-along practice. Two headphone jacks allow silent duets.

Setup and Accessories

The C1 Air assembles as a slim console with side panels, a back board and a pedal board in under an hour, and its folding cover keeps dust off the keys. Add an adjustable bench, which is not included, and headphones with a quarter-inch plug. The cabinet is shallow enough for a hallway or bedroom wall and comes in black, white or brown.

Long-Term Fit

The RH3 action does not become a limit for most players; owners upgrade for resonance modeling, more polyphony or Bluetooth MIDI, which point to a Kawai CN or Roland console. As a current Korg console it holds value well.

Strengths and Limitations

Strengths

RH3 flagship action in a slim console with Bluetooth audio
Thirty sounds with split and layer
Built-in speakers and three pedals
Compact cabinet

Limitations

Bluetooth is audio only
120-note polyphony
Weight and speaker power not stated on the listing

How We Scored It

Key Action (30) 29/30

Piano Sound (25) 21/25

Features (15) 10/15

Build and Portability (10) 10/10

Connectivity (10) 7/10

Value (10) 8/10

Scores reflect published specifications, documented features and value against the alternatives below. They are editorial research scores, not laboratory measurements.

Alternatives to Consider

Korg LP-380U

Pianists who want Korg's best action in a slim home cabinet with three pedals and real speakers

Read the Korg LP-380U review →

Roland F107

Buyers who want Roland's entry console action in a modern, shallow cabinet

Read the Roland F107 review →

Yamaha Arius YDP-S56

Apartment and small-room buyers who want the YDP-166's action and sound in the slimmest Arius

Read the Yamaha Arius YDP-S56 review →

Questions Buyers Ask

Yes, a Bluetooth audio receiver for streaming music through the speakers. It does not offer Bluetooth MIDI.

RH3, Korg's flagship hammer action, shared with the LP-380U, D1 and Grandstage.

Thirty, with split and layer modes, confirmed on the listing.

120 notes per Korg's specification; the listing does not state it.

The C1 Air for Bluetooth audio; the LP-380U for documented 2 x 22 W speakers. Both use RH3 and 30 sounds.

No. The C1 Air ships with the keyboard and cabinet parts; add an adjustable bench.

Black, white and brown per Korg; the listing reviewed is black.

Yes, a two-track MIDI recorder is built in for reviewing practice.

Yes. The RH3 action is the same keyboard Korg fits to its stage flagships, and it builds strength and control for classical study. The 120-note polyphony is the only specification an advanced student might run into on dense, pedaled, layered passages.

Korg C1 Air

See the current listing, price and included accessories.

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About This Review

Mandrillis Team

The Mandrillis editorial team researches and compares audio and music gear using manufacturer documentation, verified specs and real buyer feedback, so you can make a confident purchase without wading through marketing claims.

Read our full research methodology.