Technical Pro PRE5050 Professional 2-Channel Pre-Amplifier Rack Mount, Black Mic / line echo with time, repeat & volume controls Bass, Mid, Treble and Balance Control - Mic level with connector inputs and headphone jack Inputs: RCA (4 audio sources) - Outputs: RCA , unbalanced XLR Tape monitor - Separate volume control Mono, mute, low cut & loudness controls