Detailed Description  Active loudspeaker, professional speaker, pa loudspeaker system, professional loudspeaker, pa audio system, active speaker, subwoofer speaker, sub-bass speaker. M15A Type......................................Active Sub Woofer Component............................15"X1 Nominal Impedance.................8Ω RMS Power Handling .............400W Peak Power Handling .............800W Frequency Response..............50Hz-350Hz Sensitivity(1W/1M).................102dB Max. SPL..............................129dB Output...................................250W+400W+600W RMS   Digital Power Amp.  2 In 4 Out DSP Module Dispersions............................N/A Dimension HWD(mm).............510X650X510 Shipping HWD(mm)................570X710X570 (0.23CBM) NW/GW(Kg)..........................45.2/50