1.It is using a bulky capacity for smoothing and it is better use in the high classe karaoke room.

2.This model uses 4 pieces of Big audio tube in SANKEN and 4 cooling fans. It can play double 15" speaker.

3.This model has howling off function key.when it is turned on, it can avoid the howling from microphone. The echo of this model is liveness and sense
  of reality. And also it can connect to other Reverb.

4.It has high quality digit IC form Mitsubishi.

5.Four bands frequency whit microphone:
  ① CLEAN,adapt to popularize.
  ② LENIE, can restrain whistle call, adapt to soprano and tenor.
  ③ MELLO,adapt to bass.
  ④ SOFT, adapt to professional singer

6.Double transformer for power supply make the work of amplifier more stabile
  and the effect of timbre more penetrative and more powerful.

   Specifications:

   Output Power： 400W+400W  8Ω
   Frequency Response： 80Hz－13KHz±3dB 
   Signal to Noise Ratio: ≥76dB <A standard> 
   Separation： ≥30dB <A standard> 
   T.H.D： ≤0.2% 
   Power Requirements： ~220V/50Hz 
   Net Weight:  21Kg 
   Size(mm)： 520(L)x210(H)x490(W)