Fairfield Circuitry Placeholder - Bucket Brigade Reverb

An analogue implementation of a digital reverb algorithm — BBDs, mixers, VCAs, and what Fairfield calls "simple zesty filters." The Householder topology gets you dense, convincing echo with only three delay lines. The result sits somewhere between a damp spring, a tiled room, and a space that doesn't technically exist.

Size and Ratio sculpt the imaginary space. Decay and Tone shape how long it lingers. Modulation switches, a feedback-path FX insert loop, and CV inputs for Decay and Size mean it can go subtle or strange — and integrates cleanly into modular rigs.

Not pristine. Noise is part of the character. If you want reverb that behaves like an instrument, this is it.

Features / Highlights

• Analogue implementation of a digital reverb algorithm via BBD chips
• Householder reflection feedback matrix — dense echo from only three delay lines
• FX insert loop in the feedback path for injecting external processors
• CV inputs for Decay and Size (modular-compatible)
• Three-position modulation depth and waveshape switches
• Switchable low-pass filter to tame high-end noise
• Hi-Z input (jumper-selectable for line level)

Specifications

• Switching: True Bypass
• Power: 9–9.6 V DC (center negative)
• Current draw: approx. 80 mA
• Delay range: 12–160 ms
• Input impedance: 1 MΩ
• Output impedance: 1 kΩ
• Dimensions: 11.9 × 9.7 × 4.8 cm

Controls

• Size: sets the room size of the simulated space
• Ratio: scales two additional delay lines relative to Size
• Decay: controls reverb tail length
• Tone: shapes high-frequency content
• Mix: blends wet and dry signal
• Volume: sets overall output level