Williamson used his Les Paul (about which much was written in the Feb. issue of Fretboard Journal) with a Vox AC30 amp (although he used a Marshall for a few overdubs). I'm not sure what kind of acoustic he. Asheton used a Fender Precision Bass and a Marshall bass amp (which is where the Stooges got into using Marshall bass amps, see the contract rider for Iggy's extended soliliquy on the subject). VoxAC30's are great amps, Billy Wyman got his job in the Stones because he owned two of them. It's the amp heard on many classic UK sides by the Kinks, Stones, Who, etc.