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SX-400

Kawai SX-400

SX-400
(image courtesy of http://home.telfort.nl/~smeyer/siel/)

Released: 1981

MSRP: 1690

Synopsis:

Quad oscillator, but all oscillators use the same waveform. Architecture Class: Conventional (subtractive).

Ebay Description:

The Kawai/Teisco SX-400 is a 49 key pressure sensitive monophonic synthesizer, featuring 4 oscillators (saw/pulse/triangle/noise waveforms), a resonant low pass analog filter, a high pass filter, dual ADSR envelopes, dual LFOs (saw/triangle/square waveforms), portamento/glissando, filter input, and CV/gate inputs.

Physical

Form Factor Dimensions Weight Audio Input Audio Output Communication Port Control Input Control Output Switch Input Power
49 keys W:945mm D:510mm H:155mm 22kg filter stereo no CV (1V/oct) gate pedal no no AC (10W)

Interface

Compatibility Multitimbral Memory Program Memory External Storage External Programming UI Input UI Output
- N/A preset:8 user:8 no no sliders/switches LED

Architecture

Multitimbral Polyphony Unison Architecture
no 4osc:1 2osc:2 1osc:4 no VCO->VCF->VCA->HPF

Output

Effects Pan Modulator Volume Modulator Headphone
chorus no EGII LFOI pedal yes

Control

Arpeggiator Arpeggiator External Sequencer Sequencer Memory Sequencer External Continuous Program Change
no N/A no N/A N/A BendLever no

Keyboard

Key Pressure Chord Memory External Control External Sustain Key Scaling Velocity Curves
Routed to pitch, filter, LFO (to filter and/or pitch) no CV gate no no

Source

Name Signal Class Waveform Octave Range Amplitude Modulator Harmonics Modulator Pitch Modulator Wave Assign Modulator
VCOI analog saw pulse triangle 2'-16' no PWM:EGI/LFOI pressure BendLever EGI LFOI glissando portamento no
VCOII analog saw pulse triangle 2'-16' no PWM:EGI/LFOI pressure BendLever EGI LFOI glissando portamento no
VCOIII analog saw pulse triangle 2'-16' no PWM:EGI/LFOI pressure BendLever EGI LFOI glissando portamento no
VCOIV analog saw pulse triangle 2'-16' no PWM:EGI/LFOI pressure BendLever EGI LFOI glissando portamento no
Noise analog noise:white - no no no no
Sub analog square? - no no no no

Filter

Name Signal Class IC Resonant Shape Frequency Modulator Resonance Modulator Shape Modulator
VCF analog discrete yes low pass (16Hz-20kHz) pressure BendLever EGI key LFOI LFOII no no
HPF analog discrete no high pass (16Hz-16kHz) no no no

Envelope

Name Level Rate Loop Polarity Trigger Level Modulator Rate Modulator
EGI sustain attack decay release no filter key LFO2 no no
EGII sustain attack decay release no no key LFO2 no no

LFO

Name Waveform Delay Polarity Sync Delay Modulator Level Modulator Rate Modulator
LFOI saw:down/up triangle square vibrato no no no pressure BendLever no
LFOII triangle? no no no no no no
Conventional Models
100F 100P 60F 60P 110F SX-400 SX-210 SX-240
K3 K3m