... KTV rooms. more nice from its. We are manufacturer, professional power amplifier.1, 150W*22, 20HZ-20KHZ3, Echo4, As for KTV rooms ... .05% information: 180mv MIC: 10mv Details: 1, Within ECH+DELAY stereo mixer , as by the center equipments control it; 2, There ... by the time. outside connecting 6-8Ω speakers. 4, CNC equipments, inner with fan. 5, The voltage can for 185-260v last ...