When only the fat, warm sound of a 15 speaker will get the job done, we highly recommend the SVT-15E. Armed with a massive five-pound magnet, the SVT-15E's custom-designed 15 speaker generates chest-thumping low end like nobodys business all the way down to 33Hz. Team it up with the SVT-CL head and an SVT-410HE, for top-end, and you're guaranteed to get the dance floor moving.
 
LF Drivers: 1 x 15 Cast, Voicecoil: 2.5
RMS Power Handling: 200-Watts , Frequency Response (-3dB): 50Hz-3kHz , Usable Low Frequency (-10dB): 33Hz
Nominal Impedance: 8-Ohms
Sensitivity: 98dB, Maximum SPL: 123dB