The Mono switch 5d feeds the left input to both channels when not running in stereo mode.
What does the DDT LED 11 indicate?
The DDT LED 11 will light at the onset of clipping, and a steady bright glow means the unit is clip-limiting to prevent severely clipped waveforms from reaching the speakers.
What is the function of the Ground Lift Swithces 10?
The Ground Lift Swithces 10 provide for breaking ground loops on the input channels 10a or the high pass outputs 10b. Leave these in the Normal position unless there is a need to break such a ground loop, such as unusual system hum or noise.
