Features Specifications:Public Address Amplifiers  1) RMS:60W,120W,180W,240W2) max:90W,180W,270W,360W3) Frequency response:50-15.000Hz(±3dB)4) Harmonic distortion:≤1%5) S/N Ratio:Input ≥75dB6) Power supply:220Vac,24Vdc7) Input/sensitivity:Main in:1V8) Controls:1 master volume 1 treble control 1 bass control9) Protetion:AC Fuse,overload and short circuit temperature protection110°C10)Dimension(W*D*H):430*330*8817)Output:50-70-100V