Fairfield Circuitry – Placeholder Bucket Brigade Reverb

Fairfield Circuitry Placeholder · All-analog Bucket Brigade (BBD) reverb with Householder echo density

100% analog signal path · 3 BBD delay lines (12–160 ms) · SIZE/RATIO for fast density · Random/cyclical modulation · Feedback insert loop · True bypass · CV for DECAY and SIZE

Placeholder sits in a rare spot between mechanical and algorithmic reverb ideas—implemented with a fully analog signal path. It’s not a “delay that sounds like reverb”, but a reverb that sometimes behaves like a delay: tactile, grainy, and alive, with the quirks (and the magic) that come from pushing analog building blocks into reverb territory.

Under the hood, Placeholder is an analog implementation of a digital-reverb topology (the Householder approach), built from BBDs, mixers, VCAs, and simple but musical filtering. With only three delay lines, it achieves quick echo density, and the interaction of SIZE and RATIO becomes the core creative control—ranging from unrealistically tiny rooms bordering on flanging, to longer reflections approaching slap-back behavior, plus spring-like flavors and plate-like hints depending on settings.

No presets here: fully variable controls go straight to the circuit. And yes—because it’s BBD-based and all-analog, noise is part of the experience, especially with longer delay times, brighter TONE, and wetter MIX settings. Push DECAY and it can sing into self-oscillation, sometimes producing distinct notes. When it does, you can play with it, reduce feedback conditions, or introduce modulation to tame it.

Key features

• All-analog BBD reverb (not a digital emulation)
• Householder topology with 3 delay lines for fast density build
• Fully variable controls, no presets—direct “room” control
• Wide range of spaces: tiny rooms to longer, more echo-forward ambiences
• SIZE + RATIO as the main creative axis for room timing/spacing
• TONE tilt filter around 500 Hz to set the room’s mood/material
• DECAY from single reflection to self-oscillation “singing”
• Digitally-controlled modulation (random/cyclical) for subtly moving rooms and improved smear
• INSERT/feedback loop on the main feedback path (can get unruly with gain)
• CV inputs for Decay and Size (modular levels OK)
• True bypass

Technical specifications

• Delay range: 12 – 160 ms
• Front panel controls: MIX, VOLUME, SIZE, RATIO, TONE, DECAY
• Additional functions (per configuration): modulation random/cyclical, LPF options, output section options
• I/O:
  • IN: mono Hi-Z instrument input (internal jumper for line-level with −6 dB pad)
  • OUT: mono Lo-Z output
  • INSERT: feedback loop (TRS: tip send / ring return)
  • Power: regulated 9V DC center-negative
• Input impedance: 1 MΩ (100 kΩ @ −6 dB pad)
• Output impedance: 1 kΩ
• Bypass: true bypass
• Power: 9–9.6V DC · current draw approx. ~80 mA
• Dimensions: 4.7″ × 3.8″ × 1.9″
• CV:
  • D (Decay CV): useful range ±5V
  • S (Size CV): useful range 0–5V (flips delay lengths: short becomes long, etc.)
• Manufacturer note: do not adjust trimpots

Find the Fairfield Circuitry Placeholder and a carefully curated selection of boutique pedals at onemorepedal.com, your specialist store for high-end effects.

An analog reverb that doesn’t just wash—it moves, breathes, and sometimes sings.

https://www.youtube.com/shorts/HoU_TWuYkrQ