Each of the three channels is based on the discrete transistor circuit (4014) from the 1005 module. The two independent inputs (X and Y) can be DC or AC coupled and are passed into the multiplier, with each input having a LEVEL control.

The output can be set to the result of the multiplier (MOD) for ring modulator tones or the result of  mixing the two input signals (MIX) after the LEVEL controls. Each channel can also be used as a VCA by connecting an audio signal into INX in AC mode and a 0 to +10V control voltage into INY in DC mode.

High quality Alpha potentiometers and Rogan knobs have been used to ensure control voltages can be easily set and adjusted.