We are manufacturer, professional power amplifier 1, 150W*2 2, 20HZ-20KHZ 3, Echo. 4, As for KTV rooms. 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 mode: Bass: 100HZ+/-10DB Treble/hign: 10KHZ+/-10DB S/n ratio: 60db T.H.D: 0.05% ...