A ’70s Cult Classic, Reimagined for the Modern Studio
A contemporary take on a modular synthesis cult classic, the Erica Synths Resonant Filterbank is a performance- and studio-ready desktop FX unit that’s simply bursting with analog-tinged flavor. It features 10 bandpass filters with per-band boost and cut, bolstered by 20 independent LFOs and 20 independent envelope followers. You also get Multimode Filter, Spectral Analyzer, and Dynamic Spectral Compressor modes, providing you with both subtle and extreme processing. Equally at home with synthesizers, drum machines, and modular setups, you can drive the Resonant Filterbank into a self-oscillating drone, or you can ping it with pulses, giving rise to ear-grabbing percussive palpitations. Moreover, by virtue of a potent analog gain stage, the fabulous FX unit will also work its resonant magic on electric guitars and other instruments. Beyond that, despite its ’70s-era pedigree, the Resonant Filterbank boasts state-of-the-art digital control, putting a 128-slot snapshot memory and comprehensive MIDI control and synchronization firmly within your grasp. Topped off with a sleek aluminum case, the Resonant Filterbank will expand your sonic palette with sounds you won’t find anywhere else.
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From creative chaos to mix-ready polish
Equipped with premium-caliber film capacitors, the Resonant Filterbank features 10 filter frequencies — 29Hz, 61Hz, 115Hz, 218Hz, 411Hz, 777Hz, 1.5kHz, 2.8kHz, 5.2kHz, and 11kHz — with a 17dB-per-decade filter slope. Its Resonance knob controls the amount of feedback applied to the filter, giving rise to cacophonic feedback loops. Multimode Filter mode enables you to toggle between lowpass, bandpass, highpass, and notch filters, placing myriad sound-shaping options at your fingertips. Additionally, Spectral Analyzer mode gives you detailed insight into your audio signal, enabling you to tweak its tonal characteristics with fine-tuned precision. You also get a Dynamic Spectral Compressor mode, which facilitates real-time dynamic control based on your signal’s spectral content, making the Resonant Filterbank an effective production tool for enhancing your mixes and masters in the studio.


Old-school pedigree meets new-school precision
Despite its old-school lineage, the Erica Synths Resonant Filterbank is a fully modern FX unit. Boasting comprehensive MIDI features, it allows manual and MIDI CC control of each band’s boost, cut, and resonance. Moreover, MIDI clock synchronization certifies lock-tight timing with your other MIDI devices, keeping your modulations and preset sequences in perfect time. Beyond that, the Resonant Filterbank features snapshot memory with 128 storage slots, reinforced by discrete and morphing snapshot transitions. Lastly, you get 5-pin DIN MIDI Thru and MIDI In ports along with a Footswitch jack for hands-free control over snapshot and mode switching.
Fortify your sonic arsenal with Erica Synths
Prized for weighty tones and hypnotic drones, Erica Synths's Eurorack modules fortify your sonic arsenal with unique sounds that work brilliantly across genres. The company was founded by Girts Ozolins, who started out designing DIY kits and components for sound designers and synthesists. Today, Sweetwater is delighted to offer you Erica Synths’ acclaimed line of Eurorack modules and systems, which have captured the imaginations of synthesists worldwide with their distinctively punchy, aggressive sound and innovative features.

Erica Synths Resonant Filterbank Features:
- A performance- and studio-ready desktop FX unit based on a classic ’70s-era resonant EQ
- Premium-caliber film capacitors in the BPF
- Equally at home with synths, drum machines, and modular setups
- +24dB analog gain stage is ideal for electric guitars and other instruments
- 10 BPF with per-band boost and cut
- 20 independent LFOs and 20 independent envelope followers facilitate dynamic and complex sound design
- Resonance knob gives rise to cacophonic feedback loops
- Multimode Filter mode toggles between LPF, BPF, HPF, and notch filters
- Spectral Analyzer mode supplies detailed insight into your audio signal
- Dynamic Spectral Compressor mode facilitates real-time dynamic control based on your signal’s spectral content
- Manual and MIDI CC control over each band’s boost, cut, and resonance
- MIDI clock sync certifies lock-tight timing with your other MIDI devices
- 128-slot snapshot memory with discrete and morphing snapshot transitions
- Sleek aluminum case provides an eye-grabbing aesthetic