Fuzzy Muff

Very early EHX gain box. Revised PCB for 2018.

No idea why they called it the Muff Fuzz, as what we have here is actually a low/medium gain overdrive.

Very low part count = simple dirt. Sounds like a vintage tube amp with a worn but warm speaker.

Note: this is NOT a Big Muff Pi. Different thing altogether.

Board-mounted pot for minimal wiring and easy enclosure mounting.

Kit is available with a standard sized 1590B enclosure with battery, or a mini 1590A (36 x 90mm) enclosure with DC power only, though be aware that you'll be wiring in a very confined space.

Partial kit: PCB, all board-mounted components, pots.

Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED.

Enclosure (pre-drilled) is only available with full kits, and will (1590B) / will not (1590A) take a battery. Knobs are not included.

Builds are only available with full kits including enclosure. Please choose appropriate knobs.

Difficulty: Easy

PCB size: 35 x 21mm

Knobs required: 1

Enclosure: 1590B, 1590A

New doc on the way. Download the previous INSTRUCTION PDF


Pedal Parts



£19.20 inc. tax

£16.00 ex. tax
? Tax based on United Kingdom.

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Full kits DO NOT include enclosures unless you select them in the 'Kit Type' drop-down menu.

Don't forget to download the appropriate daughterboard build document for your kit:
Standard 3PDT