Fully Featured discrete class "A" Tube Microphone Preamplifier 1/4" High Z input on the front panel Selectable plate Voltage Smooth musical sounding Optical Compressor Separate Attack and Release controls Auto/Manual Attack/Release switch Parametric EQ Large VU and LED meters Multi section clip monitor LED Selectable Source switches for VU signal monitoring of any section of the unit Two insert loops +4/-10 dB switch for optimal signal output levels Toroidal power transformer for low noise