Octo Factory

NOTE: THESE ARE NOW TOP MOUNT JACKS AND DC ONLY, though the image to the left still shows side jacks. They will be Lumberg, not Neutrik

Who doesn't love the Filthy Fack!? Five knobs of germanium fuzz fun.

How about adding three knobs to that and increasing the fun by a whole lot?

We all know and love the standard format with Vol, Comp, Gate, Fuzz and the all-important Stab pots. This version is a tweaker's delight. We've a Fat control, which will give you a variable version of the Fat switch on the Filthy Fack. Not so noticeable when playing with normal fuzz settings, but turn the Stab pot down into oscillation mode and the extra frequencies running around the circuit become very apparent, totally changing the nature of the oscillations. The Bias pot let's you soften/harden the fuzz. All topped off with a simple Tone control.

Next up is the Sanity bypass footswitch, giving you two completely different beasts with a single stomp of the foot. With it bypassed you're giving the circuit the full 9V of power it wants. Kick it and the Sanity pot comes into play, starving it just how you want and unleashing the beastly oscillations. For extra fun you can have this as a momentary switch.

Available with silicon transistors in place of the usual germanium for a different flavour of fuzz and more temperature stability.

The kit is supplied with vertical-mount pots which have round shafts, so you'll need set-screw fitting knobs. The horizontal pot spacing is 20mm, so keep those knobs small.

If it all sounds a bit much you could always opt for our six knob version, The Gimp. See the related product links below.

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

Partial kit: PCB, all board-mounted components (not footswitches), 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 not take a battery. Knobs are not included.

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

Inspired by: Modified Fuzz Factory

Difficulty: Medium

PCB size: 80 x 42mm / 80 x 18mm

Knobs required: 8

Enclosure: 1590BB

Docwnload the INSTRUCTION PDF

Product Code: OcFac

Product Condition: New

Transistors* Kit type* Ribbon connector?* Sanity Footswitch* Pre-built? (UK only.)*

£45.60 inc. tax

£38.00 ex. tax

? Tax based on United Kingdom.

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Customer Reviews

2 review(s) posted (write review)

Epic Fuzz Factory, But Watch Your Power Supply
"Pretty simple to build. Not a lot of resistors and caps to mess with, but a ton of pots. Did have problems on first test, very little sound coming out of it and sounded just like one general (weak tone). Unfortunately, I did not test the main board with a battery and jacks - because that wasn't in the main manual - so don't forget to do that in your builds. I already had the pedal complete and in the box. So I tested the pedal with a different power supply and everything was there, but I didn't know why. After another few days of testing off and on, finally figured out the power supply was to blame. Seems the pedal does not take to excess voltage or amps (bad supply was 9.9V and 1000 mA - this has been fine for many other pedals). Wish I would have figured it out sooner, but at least I didn't dissect the pedal to try to figure it out." Mario McDermott - 16 December 2020

Best Fuzz Face adaptation ever
"This was my first pedal I bought from FuzzDog, and the second pedal I've built. The assembly of this pedal was really easy and took me less than three hours. The instructions are very clear and the quality of the PCB is amazing. As a former owner of a Fuzz Probe I can say that this pedal sounds almost exactly the same as it's counterpart. For me the sanity switch was the reason to buy this pedal and not the Filthy Fack, this switch let's me turn the oscillation on and off without having to kneel down and turn the stab knob. The Fat option also sounds killer and makes the fuzz thicker and the oscillations even weirder." - 21 August 2019