Power Source: 120 V AC Amplification System: Class D Power Consumption: 150 W (based on UL/CSA standards), 580 W (rated output 70 V line Input 2 circuits 10 kΩ XLR-3-31 type connector CH 1 mode ON/OFF switch (ON: PARALLEL Rated Output 2 channels: 250 W × 2 (70 V line 1 channel (BRIDGE): 500 W × 1 (140 V line M4 screw terminal Frequency Response: 20 – 20 (selectable with the inner jumper) Total Harmonic Distortion:0.1% (1 kHz) Protection Circuit Protection against excessive current flow due to overload short circuit temperature rise at power amp. heat sink (100℃ or more (212゜F)) temperature rise inside the unit (80℃ or more (176゜F)) S/N Ratio: 100 dB (A-weighted) Crosstalk: 70 dB (A-weighted) LED Indicator Power (blue) × 1 Protect (red) × 2 Cooling: Forced air cooling Operating Temperature: -10℃ to +40℃ (14゜F to 104゜F) Operating Humidity: 90% RH or less (no condensation) Finish Panel: Aluminum