Tube preamplifier with compressor, limiter and DI with up to 80 dB of gain. Optical compressor circuit (no VCA) = transparent dynamics control. Balanced XLR inputs and outputs. Selectable output range for line/instrument interface levels. +48V phantom power. Custom extruded aluminum chassis. Hand selected 12AX7a valve. Unbalanced 1/4-inch inputs and outputs. Transformer isolated XLR output. LED meters for tube warmth, gain reduction and output level. Phase reversal switch Selectable release time settings. Dynamic range > 90 dB.