Professional 1700-Watt Stereo Power Amplifier with ATR. The remarkable KM1700 packs a heart-stopping 1700 Watts of output power into a lightweight (27.5 lbs/12.5 kg) package, thanks to our Accelerated Transient Response (ATR) technology. Ample power (1700 Watts in Bridge mode; 2 x 800 Watts @ 4 Ohm..