Quite possibly the best and most renown synth bass pedal around, the Deep Impact instantly turns a bass guitar into an explosion of realistic synthesizer sounds. From buzzsaw leads, funk squelches, deep sub-bass booms, and wall-of-sound pads, this does ‘em all. I scored this one from a guitarist who had bought it having no idea what it was, couldn’t figure it out and sold it for a little over a hundred bucks. Rare as hens teeth, these days they fetch upward of US$800 on eBay.