Tube Audio Lab Model 91A Amplifiers

Based on Western Electric Model 91A (WE91A) circuit

1x JJ 300B, 1x NOS Tung-Sol 6C6, and 1x 5R4 per monoblock

9 watts per block, pure class A single ended triode

Angela/Jensen Copper Foil PIO signal caps, 20W hign end Hashimoto OPTs, Hammond PTs and chokes,

All Riken and Takman signal resistors

Custom built for Andy Vuong 

Completed on 3/20/10

This is resurrection of much famed Paul Folbretch's WE91A-300B monoblocks with a minor upgrades on passive components. Of course, the chassis is painted in high temperature resistant industrial white enamel. Again, these amps need to be heard to be believed. -Min