I've acquired a used Electro-Harmonix Deluxe Bass Big Muff. As a Big Muff, it's of course a fuzz, but this effects pedal can also create sounds like a bass synth thanks to its CROSSOVER function and GATE knob settings, making it a very versatile effects unit. It also has a DI output, so I think it's also intended for use as a preamp. Currently, it works without any problems, but there are signs of repair (possibly stepped on?) around the HPF knob on the upper right side. Therefore, I'm selling it at a low price as a "defective/junk" item, so please understand that it's non-refundable and non-returnable. By the way, the CROSSOVER LPF (low-pass filter) knob only affects the dry signal and doesn't affect the effect sound (i.e., if you turn the BLEND knob all the way to the effect side, there's no change in sound at all). This is a specification. I didn't know this when I bought it and thought it was broken, so I'll mention it just in case. Thank you very much.