"Johnsonу signal hits a Fuzz Face before going into his 1968 Marshall 50-watt Tremolo head. It drives the top Marshall 4x12 in his stack, which is loaded with Celestion 30-watt speakers. Johnson ran his mid-у80s BK Butler Tube Driver and Maestro Echoplex EP-3 through this 1968 Marshall 50-watt Lead head, which drives the lower of two stacked Marshall 4x12 cabinets. Its cab is loaded with 80-watt Celestions."