U-Sound OP-50 Tube Guitar Head. Part Two.

Oleg and Igor Plastinkin Production Demo. U-Sound Plexi Style OP-50 Tube Head. • Universal multichannel tube amplifier • 50-Watt 2 x EL34 Power Tubes • Four ECC83 Preamp Tubes • Dirty Channels - Gain, Volume, Treble, Middle, Bass (HB and B have a common EQ) • Clean Channel - Gain, Volume, Treble, Bass and 3 position Bright Switch • Global Presence • Series Effects Loop (Return Level, on/off on rear panel) • Mercury Magnetics O50JM-SL Output Transformer • NOS Mallory Mustard Capacitors • OP-50 Switches in