Huge archive of bass-related user reviews including preamps, power amps, amp heads, speaker cabinets, combo amps, and effects.

Large database of guitar and bass amplifier and speaker user reviews.

watkins, vox, selmer, hiwatt, orange, marshall, valve guitar amp, ac15, ac30, jennings ac40, index.htm

Len Moskowitz' famous compact bass cab plans. Gonzo sound for the do-it-yourselfer.

Design and hand-build tube amplifiers; includes model speficications and dealer network. Also offer a custom-build service.

Audio projects including amps and preamps suitable for musical instruments amps, effects, and some neat subwoofer/processor plans for bassists.