Same as the RKII:
V1 A = First Gain Stage (Input Stage)
V1 B = Second Gain Stage
V2 A = 3rd Gain Stage Ch. 1 & 2
V2 B = 3rd Gain Stage Ch. 3 & 4
V3 A = 4th Gain Stage Ch. 3 & 4
V3 B = Tone Stack Driver Ch. 3 & 4
V4 A = Reverb Return Buffer
V4 B = Reverb Send Driver
V5 A = FX Loop Send Driver
V5 B = FX Loop Return Buffer
V6 A&B = Phase Inverter
