Heritage Audio TT-73, 1-Channel Microphone Preamplifier / DI in Desktop Housing, 80 dB Class A Microphone Preamplifier with 20 dB Pad, 50 dB Class A Line Preamplifier, DI input, DI-THRU socket with groundlift switch, Separate gain controls in the input and output to saturate the input signal without overloads in the output signal, Variable high pass filter, Phase circuit, Impedance: Mic: 1,200 ohm HI, 300 ohm LO, Line: 10 kOhm, DI:> 2 MOhm, Carnhill input and output transformers, +48 V phantom power, Internal power supply, Mic input XLR, Line input XLR, DI input 6.3 mm jack, Line output XLR, Desktop housing with wooden side panels and straps