Behringer 1047 Multimode Filter Eurorack Module

The Behringer 1047 Multimode Filter/Resonator is a faithful recreation of the legendary 2500-series analog filter circuit from the 1970s, built for the modern Eurorack format. At its core is a 12 dB/octave state-variable filter that simultaneously outputs low-pass, high-pass, band-pass, and notch signals — each with its own distinct sonic character. The resonance circuit is where this module truly sings: push the Q and you'll hear the filter move from subtle harmonic emphasis into thick, vowel-like formant territory that responds dynamically to incoming audio. The cutoff range spans 16 Hz to 16 kHz with separate coarse and fine controls, making it easy to zero in on a specific frequency pocket whether you're sculpting bass tones or carving out space in a dense mix.

Build quality follows Behringer's current Eurorack standard — solid panel, responsive potentiometers, and reliable jacks that hold patch cables firmly. The two CV inputs with dedicated attenuators are essential for integrating the 1047 into complex patches; route an envelope to one and an LFO to the other, and you have a filter that breathes and evolves with your performance. Under session pressure, the knobs feel accurate enough for real-time tweaking during a take, and the simultaneous outputs invite creative routing — send the low-pass to one voice and the band-pass to another for instant stereo interest. At 16HP, it demands commitment in your rack layout, but what it returns in tonal variety and hands-on analog character makes it a centerpiece filter for synthesis work.