The Belton brick is the reason these kits exist at all. It is a self-contained digital reverb module, small enough to sit on a pedal-sized circuit board, that does the actual reverb generation. The builder's circuit around it handles the input and output levels and the wet/dry balance. Mod Kits DIY describes its own kit of this kind simply as a "Reverb pedal kit based on Belton Digi-Log module"1, and General Guitar Gadgets' D-VERB is "Based on the Belton BTDR-2 or BTDR-3 Digital Reverb Brick"2. The same approach shows up across the small-maker world, which gives a player comparing circuits a lot of reference points.
These are kits, not finished pedals. A builder has to solder the board, wire the pots and footswitch, and house the project in an enclosure, which is sold separately on most of these kit pages. A player who does not build has ready-made alternatives, covered below.
How a Belton brick reverb works
The brick is a sealed module containing a digital reverb processor. The pedal circuit feeds your guitar signal into it, and the module returns a reverberated version that the rest of the circuit blends with the dry signal. Because the reverb algorithm lives inside the module, the kit builder does not need to build a reverb circuit from scratch, only the supporting electronics. Dr. No Effects uses the same approach in its Moon Canyon678:
"a single knob Digital Reverb based on a high quality Belton Reverb brick with a 'Long' Reverb"
Different makers choose different bricks and different amounts of control around them:
| Project | Maker | Basis |
|---|---|---|
| The Verb | Mod Kits DIY | Belton Digi-Log module1 |
| D-VERB | General Guitar Gadgets | Belton BTDR-2 or BTDR-3 brick2 |
| Moon Canyon | Dr. No Effects | Belton brick, "Long" reverb9 |
| Fluster Cluck Reverb | Jeds Peds | Belton brick, 3 pots and a toggle3 |
| Fake Spring Reverb | Jeds Peds | BTDR-2 brick, spring-like ambience10 |
| Daedalus Dual Reverb | CopperSound Pedals | Belton 3 brick4 |
| Ancestral Apparition v3 | GuitarPCB | Belton Medium Brick module5 |
| VFE Springboard | Madbean Pedals | Belton BTDR-3H brick11 |
The amount of control varies with the design. Jeds Peds' Fluster Cluck puts "3 pots and a toggle" around its brick, which the maker says gives the unit "masses of versatility"3, while Dr. No's Moon Canyon keeps it to a single knob9. CopperSound went further with the Daedalus, building it "off the newest Belton 3 brick" rather than a chip4. Enclosure choice matters to builders too: the Fluster Cluck "fits inside one of our excellent JP1590BB enclosures" and supports right-angled pots for a tidy build3.
What a builder gets from a brick-based kit, in practice:
- A reverb circuit that does not require designing or debugging a reverb algorithm, since the brick handles it
- A control set that depends on the maker, from one knob to three pots plus a toggle
- An enclosure and finishing choices left to the builder, including right-angled pot options on some kits3
Decay and the Deluxe question
A decay control, the knob that sets how long the reverb tail lasts, is where simple brick-based designs and fuller reverb pedals separate. MOOER's R7 X2 gives an example of the control in a compact digital pedal, with "Decay and Pre-Delay knobs for adjusting the intensity of each effect"12. On the kit side, Mod Kits DIY offers a step-up build in the same family as its brick-based Verb: the Verb Deluxe, a "Reverb Pedal kit" aimed at the builder who wants more than the basic version13.
Wet/dry range is the other dividing line. Old Blood Noise Endeavors' BL-37 Reverb shows the full version of the blend control, with a Mix knob that sets "effect blend from 100% dry to 100% wet"14. A brick-based kit with a simple blend pot typically does not reach that full kill-dry to all-wet sweep, which matters if you want the pedal for ambient swells or for use with an expression rig.
Where to read next
For the broader picture of the effect itself, see the reverb pedals page. Players who enjoy building may also want to look at the other kit makers listed in the table above, since the Belton brick design is shared across all of them and the differences come down to the control set, the enclosure, and the support each maker provides.
Questions
Is the 1776 Effects Rub-a-Dub Reverb analog or digital?
It is a digital reverb. Kits of this kind, including the Rub-a-Dub Reverb, are built on the Belton Digi-Log module, a self-contained digital reverb brick. The rest of the pedal, the input and output buffering and the blend circuitry around the brick, is ordinary analog pedal circuitry, but the reverb itself is generated digitally inside the module.
Sources (14)
- The Verb, Mod Electronics (modkitsdiy.com), 2026
- Digital Reverb Pedal: DIY Kit, PCB & Schematic, General Guitar Gadgets, 2014-05-18
- Fluster Cluck Reverb, Jeds Peds (jedspeds.co.uk)
- Daedalus Dual Reverb w/ Expression, CopperSound Pedals
- Ancestral Apparition Reverb v3, GuitarPCB
- Coda Effects - Rub-a-Dub Reverb (1776 Effects), Coda Effects (www.coda-effects.com)
- Builder Profile: Hermida Audio Technology - Premier Guitar, Premier Guitar, 2009-09-18
- Guitar Pedal X - GPX Blog - Gigahearts takes inspiration from Aliens' ethereal ambient sounds for its eerie spacey / whirring RV-426 Atmosphere Processor Reverb, Guitar Pedal X
- MOON CANYON MOON CANYON, Dr. No effects webshop, 2026-07-30
- Fake Spring Reverb, Jedspeds (jedspeds.co.uk)
- VFE_Springboard.pdf, Madbean Pedals, 2018
- R7 X2 Reverb_MOOER Audio, MOOER Audio
- The Verb Deluxe, Mod Electronics (modkitsdiy.com), 2026
- Old Blood Noise Endeavors, Old Blood Noise Endeavors