1.12 channels professional microphone input, It can support several people for singing
  and enjoy the karaoke at the same time.
2.Two channel electric guitar or electronic organ input..
3.Reverberant unit is imported with original packaging. it has excellent timbre  modulation;
  And the dual relay protective circuit can protect the speaker perfectly
4.Use 8 piece of American high quality big power audio tube and double transfoumer fou
  power supply. It uses separate quadrate transformer in the front of the amplifier and  high
  quality powerful annularity transformer in the tail.The power output is very strong.
5.With double 9 band equalizer and it can be a mixer console for you to adjust each band of   frequency easily

Specifications:
   Output Power： 420W+420W
   Frequency Response： 80Hz~15KHz
   Signal to Noise Ratio： 76dB
   Separation： 45dB
   T.H.D： ≤0.2%
   Power Requirements： ~220V/50Hz
   Net Weight/Gross weight 19.3Kg/21Kg
   Dimensions(mm)：
   490(L)x200(H)x415(W)Product Size
   545(L)x300(H)x485(W)Package Size