Filth Fack! - Crazy Germanium Fuzz

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

Take a Fuzz Face, mess around on the bench, add some pots and a sprinkling of crazy dust and you have this beast.

Classic, noisy five-knobbed fuzz box with stability, compression, gate, drive and volume controls. The fuzz comes from a pair of specially selected germanium cans which can produce tame, soothing fuzz tones or veer off into wild oscillations and gated madness with the twist of a knob or two.

Most builds have fiddly off-board pot wiring. This board has connection points for all lugs of all pots. The fiddly work is all done in the copper traces. Sanity maintained.

This version of the kit has WIRED pots - useful if you want to do your own control layout or install in a guitar. A board-mounted pot version is also available for a quicker, neater build.

The enclosure option for this version will take a battery, pot spacing of 20mm - please take that into account when choosing knobs.

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 take a battery. Knobs are not included.

Difficulty: Medium

PCB size: 40 x 23mm

Knobs required: 5

Enclosure: 1590B



Pedal Parts



£36.00 inc. tax

£30.00 ex. tax
? Tax based on United Kingdom.

Customer Reviews

10 review(s) posted (write review)
As good as original 5 product stars
"I have to say this product is amazing works fantastic and sounds great. I had alot of troubling getting it right due to my own errors but the support was amazing and helped me finish the board. I intend to put this straight into a guitar once ive done the woodwork. For the price its an absolute steal, its good fun putting it together although frustrating at times when its complete it gives you great satisfaction." Chris - 03/08/2016
Better than Life 5 product stars
"Ordered my Filth Fack, got it within a few days, perfect... I have used the ZVex fuzz for years with custom guitars and this beats that hands down. Fuzz is amazing, deep and throbbing, get some amazing sounds and effects from this easy and perfectly constructed kit. Wanting to install this in my guitar I contacted Fuzz Dog and what a brilliant company, they even took the time to PDF me an easy to follow instruction on how to install this with a toggle switch. 5 out of 5 isn't enough... 100 percent satisfied, will be purchasing more for my other custom built guitars.. thank you so much.. excellent" Justin Willis - 18/03/2016
A pedal with Skronkitude. 5 product stars
"I'm an idiot. So i didn't hold out much hope for anything other than a mess to while away the dead hours with some solder and a dangerously hot tool. A couple of hours later i was testing a thing what i had built with my own naked hands and creating monstrous cacophony. After housing it in its enclosure I tested it again and lay a sobbing pile upon the hard concrete floor of the studio as my creation had died. After the mist had lifted I took it out and put it back in again. GLORY! IT WORKS! I then lost a day playing with it, getting to know its quirks. The quality of the fuzz was like a warm green velvet bath of smiling frowns. Little tweaking made howl, sputter, the volume pot oscillated sending thrillwaves through my tiny molecules. All of a shiver i found the comp and gate would shut the sound up at a crisp halt as soon as muted, no clutter just gone. I searched for fester upon the knobs and found turgid crunch, claustrophobic sqweels. What joy, what foul hellish flames i could hear flickering around my notes SUDDENLY bass synth came surging from the turn of of the compression knob. That night i lay exhausted, spent. My mind was nothing but a dull thrum. All i could think was. "I need more. What can i sell to get more?"" Fingersound Skronk - 03/11/2014
Taco Fry Fuzz 5 product stars
"Excellent value and very professional. The finished pedal offers many hours of not-so-innocent pleasure when built. I recommend buying the case. It's tight in there but it all fits and I couldn't make a box that good. The board worked first time when trialled without the switch. However, I spent some time with the meter trying to get it to work in the box with the wired switch etc until I realised that I had transposed the input and output leads from the board when I wired the switch!" Keith Roberts - 08/10/2012
Sweet! 5 product stars
"Ace kit. Poodle takes the pain out of DIY!! No spending hours trying to figure out what components to order (and invariably getting at least one wrong). No oval shaped drill holes. Just a great pedal and sweet sweet fuzz!" Azoora - 21/07/2012
Great kit 5 product stars
"Excellent service and quick delivery, kit worked perfectly first time, a great chance to own an expensive pedal for cheap! Wish i'd discovered this website earlier to be honest. Cheers" Dave - 14/06/2012
Fizz Fuctery 5 product stars
"Second kit i've had from Poodle (see also fuzz face review)... I completed this very recently in a matter of hours. I've never used a Zvex nor had I heard the possible sounds so I didn't know what to expect, but true to the claims, this little kit recreates all the sounds that are available from the real deal. Excellent fuzz parameters coupled with all those controllable synthesised squeals and howls. Very highly recommended kit and for the price (especially considering that the position of the pre-drilled holes are crucial for fitting all components neatly inside), the box is an absolute godsend... Buy. Build. Buzz." Greg Wagner - 06/06/2012
Fuzz Factory 5 product stars
"A fantastic little kit which arrived the next day very neatly packaged. Great fun to build and even more fun to use! Had a few teething problems which were all down to me but Mr Poodle kindly provided some excellent and clear email support - basically I didn't link all the grounds - Doh! All in all great value for money and fuzz to die for - Buy one!" Chris Pearce - 28/04/2012
Amazing 5 product stars
"Such a great kit, for about 1/5th of the cost of a zvex. Works exactly the same, I have just wired this up and installed it into a guitar and it works and sounds perfect. Will be back for more!" Richard - 04/03/2012
F zz F actory 5 product stars
"Another great kit. Superb quality PCB, good parts and instructions. Follow Mr. Poodles advice, and do not socket the transistors - I socketed mine, and could not get the lid on the enclosure as they sat too high off the board. Fortunately the board is top quality, so the extra heating involved in removing the sockets and soldering the transistors back in place caused no problems. I opted for a pre-drilled enclosure, and again the drilling was accurate and very well done. I can't recommend these kits highly enough." Mark - 01/03/2012

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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