We are manufacturer, professional power amplifier 1, 150W*2 2, 20HZ-20KHZ 3 ... . more nice from its. We are manufacturer, professional power amplifier.1, 150W*22, 20HZ-20KHZ3, Echo4, As ... for KTV rooms, more nice from its. Features: Output power: 150W*2 Frequency response: sound: 20HZ--20KHZ Turning ... , Within ECH+DELAY stereo mixer , as by the center equipments control it; 2, There be front stereo mixer ...