Hammer Action Keyboard

88-note, fully weighted hammer action keyboard with adjustable touch sensitivity.

20 Inspiring Factory Presets

Enjoy a variety of instrument selections featuring our Triple Strike piano, organs, guitars, strings, and more.

50 Auto-Accompaniment Styles

Use left-hand chords to create real-time arrangements, triggering built-in interactive backing patterns in a variety of musical genres.

Modern Cabinet with Integrated Sound System

Housed in an attractive stage piano style cabinet the KA-90 comes complete with a detachable music stand and built-in 4-speaker sound system. You’re ready-to-go for either home or portable use.

Simple and Intuitive Controls

The sleek control panel and clear display provide quick access to all system functions.

MIDI Song Recorder

With the easy-to-use song recording features, you can record and store up to 5 of your own keyboard performances.


All specifications subject to change without notice.

Keyboard: 88 Note fully weighted, hammer action with adjustable touch sensitive keys
Keyboard Sensitivity: 4 selectable response levels
Display: 3-character LED
Polyphony: 128 voice
Preset Programs: 20 Expressive sounds
General MIDI: No
Splits/Layers: Yes
Transpose: Full transposition to any key, +/- one octave
Tune: Adjust by Cents (+/- 100 cents)
Effects: Reverb / Chorus / EQ (5 preset selections per effect)
Auto-Accompaniment Styles: 50 pre-recorded interactive patterns in a variety of styles
Recorder/Sequencer: 1-Track; 5 Song capacity
Demo Songs: 60
Sound System: 60-watt, 4-speaker stereo sound system (peak music power)
Audio Outs: Stereo 1/4″ line out (for connecting to external amplification)
Audio In: Stereo 1/4″ line in (for connecting external sound sources)
Headphones: (2) 1/4″ stereo headphone outs
USB: (1) port; MIDI over USB for connecting to/from an external computer sequencer
Pedals: 1 switch-pedal input (sustain pedal included).
Stand: Optional stand with built in sustain/sostenuto/soft pedals

(sold separately)

Finishes: Matte Black,, White
Included Accessories: Power adaptor, (1) switch/sustain pedal,
Dimensions: 5.4″(H) x 53.7″ (W) x 14.4″ (D)

13.7 cm (H) x 136.5 cm (W) x 36.6 cm (D)

Weight: 27.1 lb / 12.3 Kg
Power: DC 12V 2.0A external power supply



Product Comparisons

KaE1 KA50 KA-70 KA-90 KA-120 MPS M1
Keyboard Key Action 88 hammer 88 semi-weighted 88 spring 88 hammer 88 hammer 88 hammer
Adjustable Sensitivity
Display n/a n/a LED LED LCD OLED
Pitch Bend x x x
Sound Polyphony 128 32 128 128 128 256
Factory Presets 20 16 20 20 600 178
User Presets x x x x 48 10
Piano Samples¹ GD* TS TS TS GD
String Resonance x x x x x
Pedal Resonance x x x
Piano Key-Off Samples x x x x x
General MIDI x x x x x
Sound Control Tune
Tuning Scales x x 7 7 x x
Performance Assistant x x x x
Accompaniment Styles x x 50 50 230 x
Drum Patterns x x x x x 10
Songs 0 16 60 60 125 0
Educational Features x x x x x
Sound System Speakers 4 4 4 4 4 4
Power 30W 30W 60W 60W 70W 48W
Connections Audio Outputs
Audio Inputs
Mic Input x x x x x
Headphone 1 1 2 2 2 2
MIDI Ports x x Out Out In/Out x
USB-Audio x x x
USB-Device x x x x x
Bluetooth Audio x x x x
Bluetooth MIDI x x x x
Switch Pedal Input ✓ (w/ half damper)
Accessories Music Stand
Sustain Pedal
Power External Adaptor
Battery x x x x

¹ GD = German D, TS = Triple Strike.
* These pianos are an optimized version of the German D grand pianos, derived from the same quality content but using less samples.


How can I restore my KA-90 to its factory defaults?


  1. Turn the KA-90 OFF.
  2. Press and hold down the [+/YES] and [-/NO] buttons together.
  3. With the above buttons still depressed, turn the KA-90 on.

The unit will then erase its user memory, restore all factory settings and reboot.


User Manuals

KA-90 Owner’s Manual – 4.2 MB
User’s Manual (pdf)


Contact Pre-Sales

Do you have questions you need answered before you buy?

Product Registration

Register your new product with your local distributor.

Contact Distributor Support

Do you have questions about the use or application of your Kurzweil product?

Contact Service/Repair

Needing repair? Need to locate a local authorized service center? obtain parts?

Authorized Repair Facilities

Locate a Kurzweil repair facility near you.