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High Input Jack: Connect high level devices to this jack. Low Input Jack: Connect low level devices to this jack. Gain: This sets the volume gain level for Channel 1. Bass: This control adjusts the low frequency level. Treble: This control adjusts the high frequency level.
Troubleshooting Distorted Sound: Check if the amplifier is overdriven. If it is, you will have to turn the level down. Check signal source. Check distortion effect control. Turn to off for no effect. Signal sounds “discolored”: Check and adjust the EQ settings. Ensure you are using quality cables.