So I searched the forum and couldn't really find anything similar to my problem, so pardon me for starting a new thread. Basically, I play in a band with a guy who runs a pedal company with his brother-in-law, which is a dream come true, because I'm a pedal dork, and love being their test dummy. Anyways, they built me a double fuzz (two fuzz circuits in one pedal) and the first circuit has a treble boost switch on it. When I first started using it, I was in love with it and it sounded incredible, the best distortion I could get. (We're playing doom metal, so we need a ton of it) But now I'm getting a really weird reaction from the pedal, and I can't remember tweaking anything on my amp or on the pedal or anything. The problem goes like this: We're playing anywhere from Drop D to C standard, so lots of low end, but when I'm playing on the 4th string, I get almost like a putter sound... I hate to be vulgar, but it sounds as if the bass is farting if that makes sense? It sounds like it's too much overdrive in my amp, but if I back off the overdrive knob or the volume knob on my pedal, I get a similar noise. We're going to take a look at it next time we practice and see what's up, but I thought I would consult you guys too, as he's more used to working with guitars. (The battery's not dying, it's powered by a OneSpot by the way.) Anyways, is my bass tuned too low? Should I EQ around the fuzz and see if I need to boost my bottom end or mid's? I have tweaked a little bit of everything and am not getting any better results. (even turned on the compression knob on my head, which just makes it impossible to keep up volume wise...) What do y'all think?