Features 2x 1000W at 8O 2x 1200W at 4O Newly developed Class-D amplifier engine with a custom LSI Flexible onboard PEQ, crossover, filters, delay, and limiter functions Yamaha Speaker presets Utlities for safe and secure operation Specifications Sampling frequency rate: 48kHz A/D D/A Converters: AD/DA: 24-bit linear, 128 times over sampling Total harmonic distortion: 0.1% (1kHz, 10W), 0.3% (1kHz, Half power) Frequency response: ±1.0dB (1W, 8O, 20Hz to 20kHz) S/N ratio: 101dB (A-weighted, 8O, Gain setting = +14dBu) Crosstalk: Less than -60dB (Half Power, 8O, 1kHz, Vol max input 150O shunt) Voltage Gain/Sensitivity: 8O Volume max 32.0dB/+9.3dBu (Gain setting: 32dB), 26.0dB/+15.3dBu (Gain setting: 26dB), 37.3dB/+4dBu (Gain setting: +4dBu), 27.3dB/+14dBu (Gain setting: +14dBu) Voltage Gain/Sensitivity: 8O Volume max /Power Boost mode - Maximum input voltage: +24dBu Input impedance: 20kO (Balance), 10kO (Unbalance) Speaker output ports: Neutrik speakON NL4 x2, Binding post x2 pairs, 1/4 PHONE(TS) x2 Line Input: XLR-3-31 x2, 1/4 PHONE(TRS) x2 Others I/O Connectors: USB 2.0 Standard-A Connector (Female) for Save/Load, Speaker preset update, Firmware update with USB memory; AC inlet x1 with AC cord clamp Indicators: POWER x1 (Green), ALERT x1 (Red), USB x1 (Green), PROTECT x2 (Red), CLIP/LIMIT x2 (Red), SIGNAL x2 (Green); Auto LED off feature Processors: Input summing; D-CONTOUR(FOH/MAIN, MONITOR, OFF); Delay(0 - 74msec); HPF/LPF(cutoff frequency 20Hz~20kHz with polarity control); Speaker Processor(6 band PEQ + Limiter + Delay) Latency: 1.5 msec (Analog Input to Speakers) Presets: 8 user amplifier presets (Factory preset: Speaker presets for Yamaha passive speakers) Load protection: POWER switch on/off: Output mute; Output voltage protection: Over voltage limiter, user configurable by wattage and speaker preset; DC-fault: Power Supply shutdown (NOT restored automatically) Amplifier protection: Thermal: Output limiter (Restored automatically) ? Output mute (Restored automatically); Over current: Output mute (Restored automatically); Over voltage: Output limiter (Restored automatically); Integrated Power Limit: Output limiter (Restored automatically) Power supply protection: Thermal: Output limiter (Restored automatically) ? Power supply shutdown; Over voltage: Power supply shutdown; Over current: Power supply shutdown Amplifier class: Class D, Balanced output circuit (BTL) Cooling: 16 step variable speed fan x 2, front to rear airflow Power requirements: Depending on area of purchase; 100V 50Hz/60Hz, 120V 60Hz, 220V-240V 50Hz/60Hz *Verified as operating at rated power voltage +/- 10% voltage. Power consumption: 310W (1/8 MAX power, 4O, Pink noise at all channels), 60W (4O, Idling) Width: 480mm (18-7/8) Height: 88mm (3-7/16): 2U Depht: 388mm (15-2/8) Net weight: 7.4 kg (16.31 lbs) Accessories: USB cover, Owner''s Manual, Specification sheet, AC cable (2.0m) x 1 Others: Operating Temperature: 0°C to +40°C, Storage temperature: -20°C to +60°C