Two valve mic pres derived from the original Universal Audio 610 Console, as used by the Beach Boys, The Doors, and Sinatra. Featuring a wicked little EQ section per channel, with high (4.5/7/10Khz) and low (70/100/200 Hz) shelving EQ, giving 9dB boost or cut. The 2-610 also has two instrument inputs with switchable impedance of 47K or 2.2 M ohm, 2 line inputs and phase reverse. The microphone pre-amps also have switchable impedance, 500 M ohm or 2 Mhz. Deep, warm, vibey. Inputs Microphone (Female XLR) Balanced Line (Female XLR) Unbalanced Line/Instrument (1/4" jack) (DI) Outputs Balanced Line (Male XLR) Front Panel Controls Input Select Microphone: 500 ohm, 2 kOhm Balanced Line Hi-Z instrument: 47 kOhm, 2.2 MOhm Variable Gain / Input Feedback control 5 dB increments @ -10, -5, 0, +5, +10 dB Output Level Control HF Shelf EQ Switchable boost/cut: 1.5, 3, 4.5, 6, 9 dB Corner Frequency Select: 4.5 kHz, 7 kHz, 10 kHz LF Shelf EQ Switchable boost/cut: 1.5, 3, 4.5, 6, 9 dB Corner Frequency Select: 70 Hz, 100 Hz, 200 Hz Polarity Reverse Switch 48 Volt Phantom Power Vacuum Tube Complement 1 each 12AX7 and 6072 per channel