From the January '96 issue of Bass Player (the time period of their second album, "Lucy") his studio setup was a Trace Elliot AH600SM powering a Trace 4x10" and 1x15" stack and an "old SVT head" powering a second Trace 4x10". The signal was bi-amped, leaving the lows clean from the solid-state Trace ("Old SVT's are
bad a**, but they're missing some of the low-end tightness of a solid-state amp") while giving the highs some grind via an Ibanez Tube Screamer pedal.
His main bass was a Tobias Killer-B four-string, with a '78 Stingray and '70 Precision also used. Effects were a DigiTech Bass Whammy, MXR Phase 90, and Dunlop 535 series Wah.
Hope this was of some
