Model Name QS 1.3000 Gold EditionNumber of channels 1Amplifier Class DRated power @ 4 Ω 1000W x1Rated power @ 2 Ω 1500W x 1Rated power at 1 Ohm 2500W x1Rated power at 0.5 Ohm 3500W x1Rated power at 1 Ohm (2 paired work) 5000W x 1Stable load operation 0.5 OhmFrequency Range 10Hz -220HzHarmonic distortion factor (THD) 0.10%Input Sensitivity 0.2V ~ 5VInput Impedance 100 KΩThe damping factor & gt; 100Signal to noise ratio & gt; 75dBSlice Frequency and Slope 40 ~ 220/24 dBBass Boost 30 ~ 80Hz / 0 ~ 12dBSABSONIK 10 ~ 50Hz / 18dBEfficiency,%, 4 Ohm 85Fee FR4 double-sided board with epoxy coating and SMD componentsSecurity from overheating, overload, short circuit, voltage dropDimensions, mm (WxHxD) 228x53x552