This series of power amplifier with a reliable short-circuit protection, two-way microphone input. And have silent tone function, all the way input lines can be accessed by CD. Tuner and so on. All the way to do line output for recording or the use of other power sources do. Microphone. Line. MP3. High bass can be an independent regulator. For the convenience of users, the product also with U disk decoding capabilities.Technical parameters: 1, the rated output power: 40W2, the output form of :4-16 ohm3, frequency response: 40Hz-18KHz ± 0.5Db4, total harmonic distortion: ≤ 0.2% (at rated output power)5, power supply: AC220-DC12V switchable6, size: 260X200X66 (mm) cubic