Befaco Spring Reverb
Analog spring reverb with CV-controlled wet-dry mixing
8 HP Eurorack module
The Befaco Spring Reverb V3 is a Eurorack spring reverb module designed to connect to an external reverb tank via RCA connectors, providing classic analog spring reverb character with CV-controllable mixing and input levels. It features two audio inputs with individual volume faders and CV inputs, a dry/wet mix control, high-pass filter, and a VU-style LED display, making it ideal for adding warm, organic, lo-fi reverb textures to any modular signal.
Features
- Two audio inputs with individual volume faders (VOL1, VOL2)
- CV input for each channel volume (IN 1 CV, IN 2 CV)
- CV-controllable dry/wet mix (MIX CV)
- High-pass filter (HPF) potentiometer
- Mix output potentiometer
- RCA connectors for external spring reverb tank connection (white for OUT, red for IN)
- Four 100k offset trimmers (Offset 1-4) for VCA calibration
- LED metering display with green, yellow, and red LEDs plus a duoled
- Dual LM13700 OTA-based VCAs for CV-controlled signal routing
- LM3914N LED bar driver for signal metering
- Two-board design: main PCB and control PCB connected via pin headers
- Eurorack power connector with standard 16-pin ribbon cable
Controls & Jacks (28)
- WET
- IN 2 — Audio input 2 to reverb tank
- MIX — Main mixed output with reverb effect
- IN 1 CV — CV input 1 for reverb modulation
- MIX CV — CV control for dry/wet mix
- Mix — Controls the dry/wet mix balance
- IN 1 — Audio input 1 to reverb tank
- IN 2 CV — CV input 2 for reverb modulation
- HPF — High-pass filter control
- VOL1 — Input 1 level fader
- VOL2 — Input 2 level fader
- Dry Level — Controls the dry signal level (Input 1)
- Wet Level — Controls the wet/reverb signal level (Input 1+2)
- DRY/WET — Dry/wet mix control potentiometer
- LED1 — Red status indicator LED
- LED2 — Yellow status indicator LED
- LED3 — Yellow status indicator LED
- LED4 — Green status indicator LED
- LED5 — Green status indicator LED
- LED6 — Green status indicator LED
- LED7 — Green status indicator LED
- Duoled — Dual-color status indicator
- OFFSET 1 — Trimmer for VCA offset calibration on IN 1 CV path (TP1)
- OFFSET 2 — Trimmer for VCA offset calibration on IN 2 CV path (TP2)
- OFFSET 3 — Trimmer for DRY/WET VCA offset calibration (TP3)
- OFFSET 4 — Trimmer for DRY/WET VCA offset calibration (TP4)
- RCA OUT — White RCA connector — send signal to reverb tank input
- RCA IN — Red RCA connector — receive signal from reverb tank output
How-To Guides
- Calibrate IN 1 CV Bleed
- Calibrate IN 2 CV Bleed
- Calibrate DRY/WET MIX CV Bleed
- Connect or Disconnect Spring Tank
- Classic Spring Reverb Send
- Fully Wet Ambient Spring Wash
- CV-Automated Reverb Throws
- Dual Source Spring Blend
- CV-Gated Reverb Swell
- High-Pass Spring Sparkle
- Parallel Dry and Wet Mix
Explore the interactive Spring Reverb panel on BleepDex — tap any control to learn what it does.
