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Sequential Circuits Pro One - used
This SCI Pro One is in fantastic condition with only minor signs of wear. Very clean for its age. It even includes the original box (in very nice shape) and original manual in excellent shape. It's fully functional and sounds excellent. All keys trigger properly, pots are clean and switches all working, calibration is good and holds tune. Very hard to find an SCI Pro One so clean and impossible to find one with original box! Here's your chance as a collector, this will hold its value nicely.

Polyphony - Monophonic
Oscillators - 2 VCOs (CEM-3340 chips): : VCO A saw/pulse, VCO B saw/tri/pulse, Noise
LFO - saw, tri, pulse
Filter - CEM-3320 Filter chips: 4-pole lowpass with Cutoff, Resonance, ADSR Envelope, Keyboard Tracking
VCA - ADSR Env
Keyboard - 36 keys
Arpeg/Seq - Arepg: UP, UP/DOWN patterns, Latch mode; SEQUENCER: 2 patterns of pitch info only, 40 note capacity.
Control - CV/GATE
Date Produced - 1981 - 1984

Sequential Circuits Pro One Owner's Manual