Egnater TWEAKER 40 Guitar Amplifier Head 40-Watt Tube Amp Bass, Middle & Treble Controls, AC, British or American Voicing Switch. Two Channels with Independent: Volume & Gain, o Tight & Bright Voice Switches, Vintage / Modern Amp Voicing Switch, Clean / Hot Gain Selector, Mid Cut Switch. Buffered Effects Loop with Level Selector, 2 Button Footswitch Included. 117V/230V Voltage Selector.