A phantom power switch is fitted for use with capacitor mics and applies
phantom power to the rear mic input XLR.
A phase invert button is fitted to easily correct any phase anomalies
caused by difficult mic placement or mis-wired cables
The high pass filter attenuates signals below 120Hz@18dB/Octave.
The Input M-S matrix operates immediately after the input gain stage.
If M-S (sum and difference) mic signals are connected to the inputs, the
DMA can be used to amplify them directly before sending them on to the
mixer or tape recorder.