Doepfer A-111-4, Quad Precision VCO, Perfect for polyphonic or paraphone patches, Four precision VCOs with output mixers and a master control unit, Waveforms: Triangle, sawtooth and rectangle with individual outputs, Minute 10 octave frequency range, Master section with 1V / Octave control input, Sum output of the individual waveforms and CV output (sum of all control voltages of the master unit), Width: 18 TE / HP, Depth: 40 mm, Electricity requirement: + 120mA (+ 12V) / -100mA (-12V)