9-series Dsp digital karaoke amplifier Power choose:180-450W Channel choose:2ch-5ch Features: *24BIT digital(4 scale difference, 2.5 scales)exchange adjustment controller. *Digital tone control of treble and bass. *3 types of DSP music pre-set modes. *External jack of active subwoofer, adjustable frequency of subwoofer. *Active subwoofer manage-decline the volume of subwoofer by microphone or computer Rs232 terminal. *No noise protect function when power on, Low cut of the main channel music(20Hz-200Hz). *5 sockets of microphone. *Professional level 20 BIT DSP reverberation echo. *Karaoke singing enhancing output. *Karaoke inspiration function. *Gain or decline using digital control, independent control of tone and effect of treble and bass. *Use hidden or digital adjusting, reliable function lock, and parameter storage. *Reliable SMT. *Parameter displayed by LCD. *Multiple AV input auto detecting function. *The volumes of Microphone and music adjusted by corresponding 360 degree adjuster. *Dimensions(HWD): 495mm*380mm*200mm *Shipping(HWD): *NW/GW(Kg):21/22.5