Model G-1 Guitar Amplifier Owner’s ManualPage 7 of 1413 – MASTER – Controls the over all volume andoutput of the amplifier.12 – PLAY/STANDBY/OFF – An all-inclusivefunction control - go from Off/Standby/On,with one switch.Rear Panel1 – FUSE- 3Amp 250V AGC fuse.2 - AC POWER – an IEC standard removablepower cable. This unit is shipped for USdomestic markets with a nominal line voltage of117VAC 60Hz.3 - PRESENCE - Brings in highs through theOutput section of the amplifier. Turing thePRESENCE all the way counter-clockwiseproduces a dark, beefy tone. The knob in themiddle is “design center” where the amp wasdesigned and most effective to the over alltone. Turning the knob more clockwise