Golden Age Project Pre573 MK2 Vintage 1073 Style 500 Series Mic Preamp Made for 5-Series racks "Vintage Style electronics, no intergrated circuits in the signal path" Enough gain to handle passive ribbon mics with quiet sound sources "GAIN/LINE mode switch, gain is reduced by 3 dB in LINE mode" "Selectable two position high frequency AIR boost eq, 3 or 6 dB @ 3 kHz"