Synthesizer IIc
This instrument was described in a 1972 Moog catalog as “a moderately priced middle synthesizer”.  The optional 960 (sequencer) and 961 (sequencer trigger interface) are shown in the above picture. Without these two optional modules, the upper rack would be half empty. Once again we see that the ‘console’ type synthesizers included the ribbon controller as standard equipment.
 
 
Synthesizer IIc
 
Module complement:
901 VCO
901A VCO controller (2)
901B VCO (5)
902 VCA (2)
903A noise source
904A low pass VCF
904B high pass VCF
904C filter coupler
905 reverberation unit
907 fixed filter bank
911 ADSR (2)
911A dual trigger delay
984 matrix mixer
 
half-height modules:
mixer (3)
trunk lines
power switch
 
keyboard
ribbon controller