Active speaker, Quality product with good price!
Active loudspeaker, subwoofer speaker, Active Sub-Bass, professional speaker, Professional Loudspeaker, pro audio speaker, Stage Speaker, audio speaekr, active speaker.

Type..........................Active Sub Woofer
Component.....................15"x1
Nominal Impedance..............8¦¸
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