Troubleshooting Distorted Sound: 1 2 3 4 5 6 7 8 9 10 Check if the amplifier is overdriven. If it is, you will have to turn the level down. Check signal source. Try disabling Bass Expander. 11 1) Power Switch: Switches amplifier on/off. 2) Power LED: Illuminates when power is switched on. 3) Input Jack: Connect your instrument to this jack. 4) Master: Adjusts overall volume. 5) Volume: This sets the volume gain level. 6) Bass: This control adjusts the low frequency level.
