Studio Electronics 4075 Filter
The Studio Electronics 4075 filter is a discrete, voltage controlled, 24/db/oct cascaded transconductance low-pass filter, employing six pairs of hand-matched transistors. In its lowest FREQUENCY setting, it shaves off higher frequency harmonics; its RESONANCE or “Q” circuit pushes those harmonics past the self-oscillation boiling point, projecting a thumpy, thrashing squeal, with explosive low to mid-range power and depth. The design is actually pulled from the four-pole ARP 4072 (better: more parts and trims), sans the 12kHz design flaw which hamstrung the original’s high end. The 4075 name has stuck—no sense correcting the little misnomer misstep now.
The 4075 filter is the most requested of the Boomstar filter models, perhaps owing to its uniqueness. Has there ever been a better match for a square wave? It weaves dreams with “glidey,” 70s basslines, is a natural in the lead department, and feels as if a temper tantrum simmers a mere micron beneath its veneer of faux respectability. Aggressive and articulate, this fresh ARP can snap punishing kick drum sounds out as well as color with bright, edgy, stringy tones for essential arpeggiations.
Three attenuverter and four attenuation pots control the FREQUENCY, RESONANCE, FREQ CV 1, RESO CV, FREQ CV 2, INPUT and OUTPUT, delivering smooth, detailed and complex expression.
Switch it Up
Classic Minimoog FULL and HALF strength filter frequency keyboard/voltage tracking for rounder low end with brilliant highs.
Patch it Up
Seven patch points: 1 V/O, FREQ CV 1, FREQ CV 2, RESO CV, INPUT and 2x OUTPUT direct the deepest manipulation.
All Controls and Patch Points
- FREQUENCY – Adjusts the frequency, or cut-off of the filter.
- RESONANCE – Adjusts the resonance of the filter. *
- FULL HALF TRACK – Switch between full and half keyboard/voltage tracking.
- FREQ CV 1 – Frequency control voltage 1 input attenuverter.
- RESO CV – Resonance control voltage input attenuverter.
- FREQ CV 2 – Frequency control voltage 2 input attenuverter.
- INPUT – Adjusts the audio input.
- OUTPUT – Adjusts the audio output.
- 1 V/O – One volt per octave control voltage input.
- FREQ CV 1 – Frequency control voltage 1 input.
- FREQ CV 2 – Frequency control voltage 2 input.
- RESO CV – Resonance control voltage input.
- INPUT – Audio input.
- OUTPUT x2 – Audio outputs.
Power Usage - 27mA, 34mA (+12 / -12)
|Input Connectors||3.5 mm TS|
|Output Connectors||3.5 mm TS|
|Module Slot Count||12hp|
|Connector Type||3.5 mm|
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