Boss - FZ-2 Hyper Fuzz  [schematic]

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Boss - FZ-2 Hyper Fuzz  [schematic]

Postby raindog » 28 Oct 2010, 07:20

My favourite commercial fuzz.
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Re: BOSS FZ-2 Hyper Fuzz

Postby Ice-9 » 29 Oct 2010, 10:19

Nice pics and schematic, i might have a go at building one of these , i have been impressed by the sound. Thanks
It's fairly straight forward, if you want to start it , press start. You can work out the rest of the controls for yourself !

No silicon heaven ? preposterous ! Where would all the calculators go ?
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Re: BOSS FZ-2 Hyper Fuzz

Postby dune2k » 30 Oct 2010, 11:46

They're about 40€ used around here. Wouldn't built one for that price...
JOHNO wrote:P.S Great pedal for playing 70's porn music.
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Re: BOSS FZ-2 Hyper Fuzz

Postby Cups » 02 Nov 2010, 18:30

I had one. That EQ would be great to inplement into another fuzz. Big Muff type maybe?
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Re: BOSS FZ-2 Hyper Fuzz

Postby dread pierat » 04 Nov 2010, 18:12

Here's the other FZ-2 thread: viewtopic.php?f=11&t=868
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Re: BOSS FZ-2 Hyper Fuzz

Postby LPantique » 12 Nov 2010, 16:49

Cups wrote:I had one. That EQ would be great to inplement into another fuzz. Big Muff type maybe?


When used as a booster, Is that EQ section effective and good sounding?!! i would like to implement that with a OCD.

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Re: BOSS FZ-2 Hyper Fuzz

Postby Cups » 15 Nov 2010, 03:57

The boost was huge... and clean. Unity was like 9 O'clock. The eq was quite powerful too. How it would sound with an OCD would be speculation. I do plan on breadboarding this circuit and mess around with it.

Although I "plan" on doing a lot of things too. :roll: This circuit has got my curiosity though.
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Re: Boss - FZ-2 Hyper Fuzz

Postby Old Witch » 26 Feb 2016, 21:22

Sorry for the 5 year thread necro, but is there a way to build this without the switching scheme? I cant really tell where theswitch ends and the effect begins. Im fine with leaving all the buffers in that arent driving the bypass switch, flip flop 9v etc.
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Re: Boss - FZ-2 Hyper Fuzz

Postby mynameisjonas » 18 May 2016, 10:29

Another bump to an old thread...

I just got one of these, and I was thinking of making some slight modifications to get a bit more high end sizzle from Fuzz I. I'm far from an expert, but doesn't the schematic above have the two fuzz modes mixed up? It shows Fuzz I as having the notch filter, and Fuzz II with a regular RC low-pass filter. But on the pedal, it's Fuzz II that has the scooped sound, which should be the result of that notch filter, right? Or am I completely misunderstanding what the notch filter is doing?
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Re: Boss - FZ-2 Hyper Fuzz

Postby mynameisjonas » 24 May 2016, 09:02

For anyone still reading this thread, I can confirm that the schematic above does indeed have Fuzz I and II mixed up. The one with the notch filter is Fuzz II, and the one with the regular lowpass filter is Fuzz I.

Here's a litte mod I did:
Image

- The highlighted 15nf cap (C31 on the board) was changed to 3.9nf to bump the corner frequency of the lowpass filter after the clipping section on Fuzz I from 1kHz to 4kHz. This makes Fuzz I almost as bright as Fuzz II (but with the mids intact).

- The highlighted 33nf cap (C33 on the board) was changed to 18nf to bump the corner frequency of the lowpass filter going into the octave section from about 480Hz to 880Hz. This gives you more picking attack and makes it more useful for playing with the guitar's volume knob (IMO anyway). You could go even lower, I tried 10nf, but it changed the character of the pedal a bit too much for my taste.

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aishabag23 (04 Sep 2017, 21:03)
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Re: Boss - FZ-2 Hyper Fuzz

Postby drewl » 22 Aug 2017, 15:24

The two Fuzz settings seem really gated and splatty.

Watched some You Tube vids and it seems to be normal.
I want to see if I can tame the Fuzz a bit
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Re: Boss - FZ-2 Hyper Fuzz

Postby aishabag23 » 04 Sep 2017, 21:15

raindog wrote:My favourite commercial fuzz.


Did anyone ever end up creating a vero layout or PCB for this one? I can't seem to find a layout, specifically the FZ-2 (not the FZ-3, which is IMO very different-sounding).
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