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See what happens when the reference SVS PB16-Ultra subwoofer is pushed to performance extremes with a massive display of driver excursion brought into focus with a strobe light. The subwoofer is playing a continuous 20Hz sine wave from a tone generator. Adjusting the frequency of the strobe light alters how the driver excursion is perceived visually. PB16-Ultra: www.svsound.com/products/pb16-ultra