1973 Marshall Super Lead model 1959: This amp is completely stock using NOS pre-amp tubes. The sound was reproduced through a 1971 Marshal cabinet with 4 Celestion G12M "greenback" speakers.
1970 Marshall Bluesbreaker 2x12 combo, Class A Combo: Designed and built by Bernard Raunig. This is a true single ended class A amplifier, using a 5Y3 rectifier and a single 5691 pre-amp tube. With a volume and single tone control this amp really lets you hear the tonal differences between the tubes.
EL34 comparison at a glance
Rated 0 - 5 where 0 is Poor and 5 is Excellent
Grey rows represent discontinued and unavailable tubes.