This is an ultra-great power emplifier with the magnify system of stereo. KP-2500D THE MAIN PARAMETER 1. OUTPUT POWER(RMS)DC14.4V: 2500W/1ohm @ THD+N=1% 3000W/1ohm @ THD+N=5% 1400W/2ohm @ THD+N=1% THD+N: FREQUENCY RESPONSE@-3dB(UNIT:Hz):10-200Hz Subsonic(UNIT:Hz):15-50Hz Crossover(UNIT:Hz):50-200Hz ...