An excellent sounding low pass filter with lots of color options.  Fully discrete audio path that provides a more vintage synth sound than integrated circuits. 

Discrete 5-pole low-pass filter with selectable poles - switchable slope: 6 dB, 12 dB, 18 dB, 24 dB, 30 dB

Boost control to compensate for level loss at high resonance settings

Switchable multiclipping for all 5 cores and resonance

Bootstrap clipping circuit to prevent clipping peaks (from input and resonance) below the threshold and to provide mild clipping above it

Well-tracked self-oscillation of resonance achieved with three trim pots on the back

Audio input with gain control, provides lots of colors at high or low gain.

5 CV inputs: Key (1 V/oct.), Resonance, Envelope (with attenuator), Exponential FM (with attenuator), Linear FM (with attenuator)

Screwed Metal Potentiometer and Aluminum Frontplate.

Specifications:

Width: 6 hp

Depth: 25 mm

Current consumption: 40 mA (+12 V) / 40 mA (-12 V)