Talk about a bummer. I got this pedal just a little over a month ago through a TalkBass swap and at the time was using it with a Nash J bass. Sounded great! I loved it. I've since sold the Nash though and gotten a Stambaugh, and for some reason the Proton just absolutely hates it. The Stammie just doesn't activate it right. I'm guessing it's mostly the difference between the Nash's spicy Fralin jazz pickups verses the Stambaugh's mild P/J Aero's. Add to that my light right hand technique and I guess I'm just not putting enough funk into this baby. So I'm selling it for $160 shipped within the states. This is an awesome pedal, but I guess only with certain basses/players. I'm in LA if anyone wants to swing by and try it out or save a few bucks on shipping.