Behringer 904B Voltage Controlled High Pass Filter
An 8 HP Eurorack high-pass VCF module with -24dB/octave slope and three CV inputs
Overview
The Behringer 904B is a voltage controlled high-pass filter module designed for Eurorack synthesizer systems. It is described as an authentic reproduction of the circuitry from the legendary Moog Modular system, delivering a vintage-sounding analog high-pass filter with the warm, rich tone associated with classic analog synthesis. The module features a 24 dB/octave filter slope and includes a range switch that provides two selectable frequency ranges, allowing full manual control over cutoff frequency. It offers three CV inputs for dynamic modulation of the filter cutoff, making it a flexible tool for sound shaping in modular setups.
Specifications
| Product type | Eurorack module |
| Filter type | analog -24dB/Oct. highpass filter |
| Control | Frequency control and range switch allows full manual control of cutoff frequency |
| Control | Range switch sets the frequency range in two selectable ranges |
| CV Inputs | 3 CV inputs for control of frequency |
| Eurorack specs | 8 HP |
| Power | 55 mA +12 V, 55 mA -12 V |
Design
The Behringer 904B is a point-to-point reproduction of the original Moog Modular circuitry, scaled for Eurorack integration.
Context
The 904B is part of the broader Behringer System 55 modular ecosystem, designed to work alongside other Behringer Eurorack modules such as the 902 VCA, 911 Envelope Generator, and CP3A-M Mixer.
Market
The module has been available new from 2020 to the present, with a retail price of $29.00. Up to four units can be purchased at once from Amazon Germany, where it is listed at €26.20 new.
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