Studio Electronics Boomstar 5089

The 5089 filter is a voltage controlled, discrete analog, 24 db/oct transistor ladder, low-pass filter, equipped with hand-matched transistors. This ladder low-pass filter—a subtractive analog sound synthesis foundation—in its lowest FREQUENCY setting removes, or cuts off higher frequency harmonics; its RESONANCE or Q circuit emphasizes those harmonics to the point of “squealy” self-oscillation, tracking the keyboard in its FULL setting quite nicely if seeking an alternative sine wave.

The 5089 has the roundest, slickest tone of all the Boomstar's filters. Go easy on it, and round, creamy buttery flavors wrap the oscillators in an earthy warmth; smash it and a meaty, satisfying overdrive—a maximum harvest of vintage 1960s and 1970s organic‑sounding, second‑order harmonic distortion emerge. Every setting is balanced and bountiful. Looking for traditional R ’n B baselines and leads? Focus on the rich saturation of this benchmark filter and its symmetrical cascades of generation-stretching timbres. All Boomstar Modular filters are hand-built in the USA.

Potentiometer Potential
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.