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Ketron X4

Tabletop Synthesizer Module

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X4 1
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Ketron X4
Ketron X4
250.00 street price

X4 by Ketron was released in the early 2000s along with the rest of the X series. Compared to X1, the device was offered to users at a reduced price, as it lacked a keyboard, modulation wheels, speakers, but had a more elaborate central panel.

Anyway, X4 has the same features as its "brother": a fairly extensive control set, a graphic TFC-display with backlight and dimensions 240x128. On the screen you can observe the main information (name, instrument, faders, etc.)
X4 has a wide range of sounds: PCM-samples, 276 sounds, 20 drum kits, 231 percussions, drum grooves, analog waves (sawtooth, square, sine). Moreover, the synthesizer has 128 programmable user voices with envelope control, LFO, wheels, aftertouch and effects. X4 also has 198 kinds of auto accompaniment and 198 custom styles with programmable parameter settings.

The synthesizer boasts a variety of effects, ranging from reverb/delay and ending with a distortion/wah-wah option. The sampler allows you to store up to 8 MB of 16 bit/44.100 kHz data. There you can edit the time, loop type, reverse and delete. The rear panel of X4 features inputs for stereo headphones, 2 line inputs, a microphone input, MIDI input/output/thru, 2 outputs, and connectors for sustain and volume pedals.

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More info
Usage area
Usage Design/ Form Factor
Without Keys, Desktop 
Digital (D) 
Multi Timbral Capacity32 part(s)
Tone Generator / Sound Synthesis
Technology of Sound Generation PCM
Waveform/ Spectral form (main generator) Sine
Waveform/ Spectral form (main generator) Square
Waveform/ Spectral form (main generator) Saw
Programs/ Voices/ Timbres
Drum Kits Preset20
Rotary Speaker 
Wah/ AutoWah 
Effects overall60
Sample Memory8 Mb
Resolution 16 bit/ 44.1 kHz
Tracks count16
Accompaniment Styles198
MIDI in/ out
Resolution: Horizontal240
Resolution: Vertical128
External controllers
Sustain foot pedal 
Expression foot pedal 
Swell foot pedal 
Audio out
Analogue: 1/4" (6.35mm)4
Audio in
Analog 1/4"2
Computer Interfaces
HDD: HDD size1
Height120 mm
Width590 mm
Depth250 mm
Weight7.000 kg

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