The most complex aspect of this specific schematic is the Infinium PCB (often a separate vertical board mounting to the front panel). A blurry schematic often obscures the values of the Surface Mount Device (SMD) components here.
: Vacuum tube amplifiers contain lethally high voltages even when unplugged. Always discharge capacitors before performing any internal work. Bugera 1960 - Inspection & Circuit Analysis bugera 1960 infinium schematic cracked