TRUE Systems pT2-500, 1 channel mic pre amp, New type 2 circuit design - very low noise / high headroom, Excellent high-impedance DI-THRU input/output (discrete FET-type), Gain, switchable: LO/HI range, Phase reverse, switchable: 0/180, High-pass filter, switchable: 80 Hz, 4-digit level indicator: SIG, +4, +12, OL, Frequency Response: 1.5 - 600.000 Hz (-3 db), THD+N (THD+N): 0,0004%, Noise (EIN): -133 dB, slew rate: >50 V/us, CMRR: 85 dB, Gain Microphone: LO + 6 bis +58 db, HI +18 bis +70 db, Impedance Microphone: 5,5 kOhm, Gain Instrument: LO -14db bis +38db, HI -2db bis +50db, Instrument Impedance: 2,5 MOhm, max. Outputlevel (XLR): + 29dBU, Output Impedance: 100 Ohm, Format: API Series 500 Rack