Mastodon Bass Fuzz

Absolutely massive fuzz designed for bass but just as brutal on guitar - honest!

Not too far removed from a Woolly Mammoth™, but with a bit more control at your fingertips. Relax/Push adjusts the input impedence, so you can tweak it for passive or active pickups. The addition of a Subs switch makes it really sweet - thin and crispy, a bit more bass or totally speaker shattering.

The kit is supplied with vertical-mount pots which have round shafts, so you'll need set-screw fitting knobs. Pot spacing is 17.5mm, so you'll need little 'uns.

If you want the PCB without parts there's a link for that at the bottom of the page.

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 available as an option with full kits, and will not take a battery. Knobs are not included.

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

Inspired by: Mastotron

Difficulty: Easy

PCB size: 50 x 40mm

Knobs required: 5

Enclosure: 1590B

Direct-Connect compatible (4-way)

Download the INSTRUCTION PDF

Product Code: Masto

Brand: Pedal Parts

Product Condition: New

Kit type* Ribbon connector?* Pre-built (UK Only)?*

£31.20 inc. tax

£26.00 ex. tax

? Tax based on United Kingdom.

Customer Reviews

2 review(s) posted (write review)

Fun to build
"My first try at soldering and building stuff since I finished school 20 years ago - and it actually works! Not too hard to build if you have ever done something like this before, but still a decent challenge. I had a lot of fun building it. Sounds fine on bass, but I like it on my guitar a lot more, too bad I am a bass player!
" BabyBlueSound - 10 February 2025

Great Fuzz fun!
"First up, super quick turnaround, I was expecting 2 week build time and longer for postage as it was just before Christmas, but I ordered one on the Sunday and it arrived, fully assembled, on the Wednesday! The pedal itself is great, loads of bass, tone control really useful, love the sound of the fuzz up high. Does splattery if you re into that (I m not tbh). And in a more pedal board friendly shape than the pedal it s based on. Nice job." Chris - 24 December 2023