Karaoke power amplifier system, professional audio sound power amplifier equipment, pa audio sound stereo amplifier system.  1. Microphone expand dynamically by 5 steps to choose(A. To increase treble scale B. To increase the treble and bass scale C. To increase echo effect D. To increase bass scale E. To increase sub-woofer scale. ) 2. Set up volume automatically, with wireless remote controller.  3. Auto vocal changing & MULTI-Sounding 5. 5-Microphone inputs (front 3, rear 2) 6. DSP digital echo, delay time and repeat control.  7. Suit for karaoke engineering and computer song selecting system, External connect receiver control system of remote control.  8. Built-in BMB remote control code, apply to professional system for choosing song.  9. Unique radiaton design of tunnel induced draft more stable and reliable.  10. RMS output power is 200W, power crashing.  11. Rated power: 200W+200W(8ohm) 12. Advanced and reasonable inside construction, smart circuit, delicate workmanship.  13. Dimensions HWD(mm): 152x440x327 14. Shipping HWD(mm): 210x520x415/0.045CBM 15. NW/GW(Kg): 12/13.5