TECHNICAL SPECIFICATIONS Measurement conditions: 22 °C, 230 V mains voltage, Audio Precision AP2722 Mains connection: 90 – 240 V, 50 – 60 Hz Power consumption: 0.5 W stand-by, 9 W operation, 660 W max.Dimensions (W x H x D): 280 x 220 x 63 mmWeight: 2.9 kg XLR inputs: analog line-level inputs Input impedance: 150 kOhmsSpeaker outputs: banana plugs (4 mm) Speaker impedance range: 2 – 8 ohms Output power: 2 x 250 W @ 4 ohms Gain: 25.5 dBTHD: <0,003 %Frequency response: 1 Hz – 50 kHz (-3 dB)Signal-to-noise ratio: 120 dB Protection circuits DC at output: Amp shuts down. Must be disconnected from mains and switched on again. LED is permanently on red.Overtemperature: LED flashes red. In case of further temperature rise, the amp is muted until the temperature is back to normal again.Current limiting: Amp is muted. Output current switching threshold: 17.5 A