What kind of amp are you running it through? If you have a small amp, like I used to play through, it doesn't matter what you plug in 'cause it will still sound bad. It's like my guitar teacher used to say, "All you're doin' is polishing a piece of sh!t! It's never gonna get clean,". But if you're running through a decent or good amp it's probably a problem w/ the pedal.
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BadHorsie, holdin' it down like Gravity!
Ain't nothin' but a Gear thang, baby!