V1A - clean channel 1st gain stage
V1B - clean channel cathode follower tone stack driver (only in Fat mode)
V2A - lead channel 1st gain stage
V2B - lead channel 2nd gain stage
V3A - lead channel 3rd gain stage
V3B - common 4th gain stage post FX loop
V4A - clean channel 3rd gain stage
V4B - clean channel 2nd gain stage
V5A - reverb drive
V5B - reverb recovery
V6 - phase inverter
V7,8,9,10 - power tubes
V11 - rectifier
This is a useful amp to experiment with preamp tubes in, because the two channels are almost completely independent - V1 and V4 are only used on the clean channel and V2 only on the lead channel. (The lead channel is very sensitive to V2, so if you want to start tweaking go for this one first.) V3 has a greater effect on the lead channel than the clean.
