After I install a J pickup on my Peavey.. (see the mystery Dimarzio thread in pickups) I think I'm going to tinker with my electronics. My inspiration for this is the fact that Jack Bruce had a diode added to his EB-3 in order to try to replicate the sound he got out of cranked Marshall guitar cabs.. and this product from Stew-Mac: http://www.stewmac.com/catalog/1.asp?name3=Black_Ice_Overdrive I can't find out anywhere what sort of diode was installed in Jack's bass (or how well it worked for that matter), and information on the Black Ice is pretty scarce too. A few people seemed to like it, others thought it was horrible. My guess is that regardless of how well it works on guitar, it's not worth spending 30 bucks on it for a bass application. I intend to do this mainly for a bit of fun.. if I actually get a useable sound then so be it. I have a bunch of diodes from this old electronics kit, so I guess I'll try those out. For my initial tinkering I would install the diode in place of my tone pot's capacitor (this is the method used for the Black Ice). If I found something useable I would set up another pot so I could still have a tone knob. I'll do all of my initial testing at low volumes through my little Crate.. that way if I end up producing any horrible speaker ripping noises it would matter so much. Anyone ever tried anything along these lines or have any idea what exactly was done to Jack Bruce's bass?