Acoustic 450 Owner's Manual

Contents

Acoustic 450 Owner's Manual Manual pdf 9 page image

OPERATION OF CONTROLS AND CONNECTIONS, continued8 DISTORTION CONTROLThis control is used to create a desired amount of distortion. Distortion is somewhat similar to the soundeffect known as "fuzz." When the distortion control is turned fully counter clockwise, the distortion circuit isbypassed. To obtain the desired distortion effect, advance the control knob to the right until the desiredeffect is achieved. The distortion circuit is electronically switched in and out with the foot switch whileplaying. Electronic switching eliminates clicks.9 AUXILIARY VOLUME CONTROLThis control allows you to pre-set two different volume levels: one primary and the other secondary. Usethe master Volume Control (4) to set the primary level, then press the foot switch down and set thesecondary level with the Auxiliary Volume Control. The foot switch selects between primary and secondaryvolume levels. Again, switching is done electronically, therefore there are no clicks and pops that wouldinterfere with your playing. This control enables the musician to switch with ease back and forth from leadplaying to rhythm playing.10 GROUND REVERSE SWITCHMany times you will have a persistent hum or buzz from the guitar strings. The Ground Reverse Switch hasbeen designed to reduce or eliminate this condition. Set the Switch in whichever position reduces oreliminates the problem.11 LEAD/BASS SELECTOR SWITCHThe amplifier in the LEAD Switch position operates as a wide-band flat amplifier. It reproduces fundamentaltones plus the harmonics. This is desirable when playing a lead guitar. When the Switch is used in theBASS position, the harmonics are restricted. Any harmonics that are more than 1200 Hz are de-emphasized, a desirable characteristic when playing a bass guitar. The LEAD/BASS selection is made inthe output section of the circuit making the LEAD/BASS conversion effective even when the amplifier isbeing overdriven or when used in a distort mode.12 POWER ON/OFF SWITCHThis Switch turns the entire system On. There may be a moderate thump when you turn the amplifier On.DON'T PANIC. This is normal. The "On" condition of the amplifier is indicated by the indicator light built intothe switch button.9 P/N 410134