Formerly James Hart's Sunn Sceptre, with a Univox 2x15 I picked up used for 80 bucks, and immediately blew the drivers in. I then replaced the two drivers with a Weber Ceramic Chicago & a Weber Ceramic Thames. This rig sounds absolutely killer. Tons of balls, tons of crunch, yet still extremely clear. When cranked up fully, I have to have the bass at 1 (or 2 if I want a painful amount of low end), midrange at 10, treble anywhere, mid boost on. With this, I get the cleanest, crunchiest bass sound ever. Think Entwistle at Woodstock on "Pinball Wizard." Lots of harmonic sustain and feedback as well. Yet still allows dynamics to shine through. It's also LOUD. Very loud. I couldn't imagine needing anything louder. Shakes the house. I want to add a 4x12 though, anyways. Oh, and the bass is a 1972 Fender Precision bass.