| You're right about the Fender basses and Ampeg. I've only ever seen him play the fretless Precision but I've read he plays a fretless Jazz which I'd love to know more about.
Anyway, this was is Bass Player in 2006:
Gear
Basses: Fretless '72 Fender Precision; hybrid fretless with '78 Fender Precision neck and unknown body; medium-gauge D'Addario Chromes flatwounds Rig Ampeg SVT-4PRO head, Ampeg 8x10 cabinet
Effects Boss DD-3 Digital Delay, Boss RV-3 Digital Reverb/Delay, Boss Fuzz, Boss DS-1 Distortion, Guyatone MC-3 Micro Chorus, Eclair Engineering Evil Tube DI
"I set the echo units to different settings and experiment onstage. I get this great feedback tone by combining the fuzz and the reverb delay. And it's always different. It's a bit wild, but you can direct it-a bit of lightning caught in a jar." | 
