befaco-spring-reverb

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.

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