Synthesizers.com Portable 22 Module Synthesizer

images via this auction
"The Portable-22 is a powerful 3-oscillator analog machine complete with envelope generators, amplifiers, a mixer, state-variable filter, ring modulator and more. Use any controller that provides MIDI. 25 patch cables are included and expansion is easy - just add more cabinets.

System Includes

Cabinet
QCP22 Vinyl-covered 22 space cabinet.

Internal Power Components
QPS1 Power Supply
QDH20 DC Power Harness

Modules
1) Q104 MIDI Interface
Creates control voltages and gate signals from MIDI keyboards and other MIDI devices.

1 Q105 Slew Limiter
Limits the rate of change of a signal. Useful for creating Glissando (Portamento), as an envelope generator, or a gate delay.

3 Q106 Oscillators
The Oscillator generates the basic waveforms needed to create sounds. Oscillators can also be used to generate control signals for amplifiers, filters, pan/fade and more. Provides 5 waveforms simultaneously, linear FM, exponential FM, hard sync, pulse width modulation, range selection and fine frequency tuning.

1 Q107 State Variable Filter
State Variable Filter providing Low Pass, High Pass, Notch, and Band Pass. Used to alter the harmonic content of waveforms. Includes voltage controlled resonance (Q) with a reversable attenuator, attenuatable frequency control, 1V/Octave frequency control, and a 2 channel mixer.

2 Q108 Amplifiers
Used to control the amplitude of an audio or control signal. Linear and exponential responses, dual control and signal inputs, and normal and inverted outputs.

2) Q109 Envelope Generators
Creates envelopes that are used to control filters, amplifiers, oscillators, etc. Attack, decay, sustain, release controls, manual triggering, LED output indicator. Can also be used as a gate delay.

1 Q110 Noise Source
Source of random signals used to create sounds such as thunder, drums, etc. and to create random control signals. White, pink, and low frequency random outputs with amplitude controls.

1 Q112 4-Channel Mixer
Up to 4 signals are mixed together. Manual attenuation of 2 inputs

1 Q116 Ring Modulator
Creates unusual sounds by multiplying 2 signals. Used for gong, bell, and many strange sounds.

1 Q117 Sample & Hold
Samples and holds a signal's voltage level constant - basically an analog memory. Output signals are normally used to control other modules. Often used in conjunction with the Q110 Noise module, or with an oscillator to create stairstep patterns.

1 Q124 Multiples
Provides for patching multiple signals. 12 total jacks in 3 groups of 4. 2 groups can be connected by a switch.

1 Q125 Signal Processor
Multifunction module provides signal inversion, attenuation, amplification, and adjustable voltage source.

1 Q118 Instrument Interface
Receives inputs from external devices such as guitars, microphones, drum triggers, etc. Amplifies then creates an envelope signal, gate signal, and trigger signal for use in processing by other modules.

1 Q137 Power Control/Interface
Controls the internal power supply and provides entry and exit connectors for AC and DC voltages.

Cables
9 QP4MM-12 Patch Cables, 1/4" Plugs, 12"
11 QP4MM-24 Patch Cable, 1/4" Plugs, 24"
5 QP4MM-36 Patch Cable, 1/4" Plugs, 36"

30" x 24" x 12", 40 pounds."