SVS PC4000 Subwoofer With a footprint measuring just 16\" in diameter the PC-4000 is the pinnacle of SVS iconic cylinder subwoofer designs achieving unparalleled low frequency output and deep bass extension down to 15 Hz. The unique form factor uses vertical height to add cabinet volume while a high-excursion down-firing 13.5-inch driver and 1200 watts RMS 4000+ watts peak power amplifier delivers concert and cinematic level bass with pinpoint control and accuracy to amaze serious home theatre fans and the most discerning audiophiles.