specs gain (microphone): +16 to +64 db gain (direct input): -4 to +44 db frequency response (gain=40 db): 1.5 hz to 500 khz (+0/-3 db) maximum output level: +31 dbu maximum input level: +15 dbu input impedance (microphone): 5.5 kohms input impedance (direct input): 2 mohms noise (rs=0 ohms): -132 db e.i.n. slew rate: > 40 v/us cmrr (cmv=+10 dbu): 85 db crosstalk: -130 db thd (+26 dbu, 100 kohm): .0008% power requirements: 100/120/220/230/240vac, 50/60hz, 44 watts dimensions (chassis): w=17.4 in. (442 mm) d =13.4 in. (341 mm) h =1.74 in. (44.2mm) knob extension: 1 in. (25.4 mm) weight: 14.5 lbs. (6.6 kg)