Input Impedance: 10 Kohms bridging, transformer balanced and floating. Output impedance: Less than 75 Ohms, transformer balanced and floating, to drive a 600 ohms load. Maximum output: Greater than +26dBu into 600 Ohms. THD: Less than 0.025% at 1Khz, less than 0.05% at 100Hz Maximum gain: 6 dB Power consumption: Less than 85 mA per rail at +-16VDC.