I am about to take possession of a new amp. It uses 4×6922, 4×KT90 and 2×6H30 valves. The amp. is 'self biasing'. In the case of valve failure, can I replace valve individually? Would pairs be better? Please, not quads. At this stsge, I am only looking to keep the amp. on the road, not yet exploring alternative set ups. Thanks for any advice.
Sorry for posting this on wrong forum, initially.
Brian S
Sorry for posting this on wrong forum, initially.
Brian S