The Ring SM combines four modules in one:

A very unique and warm-sounding ring modulator with three inputs, X, Y & Z. It is a vintage design based entirely on a discrete transistor core and includes an additional resonant Z modulator input. It also features a Frequency Doubling switch, which generates an octave +1 output from a single triangle or sine wave input.

Two independent Sub Bass generators with very fast tracking, creating -1 Octave and -2 Octaves from the X input. These are not simple square wave subs; they generate specially shaped waveforms and are effective up to 1kHz – they have much lower harmonic content than square wave subs, designed to deliver more power and blend much better in a mix.

A five-input DC-coupled mixer based on the discrete transistor CP3 modular design dating back to 1974. The outputs of the ring modulator, X and Y inputs, and Sub Bass outputs are routed to the mixer by default – plugging a patch cable into any of the mixer inputs breaks this normalizing and allows it to be used as a regular 5-channel mixer for both audio and control voltages.

A clipping/distortion module – input 5 of the mixer is significantly “hotter” than the other four mixer channels and will clip the signal as soon as it reaches the threshold level. If a DC bias voltage is added, the signal is shifted, allowing positive or negative asymmetric clipping of the waveform.

More information can be found here: MiniMod Ring SM