audiovector qr sub seAudiovector QR Sub SE A refined and powerful subwoofer The new QR Sub SE is part of Audiovectors entry level series, but you would never guess that just by hearing it. The bass from this subwoofer is exceptionally cohesive, well controlled, and powerful thanks to its highly sophisticated and innovative design. This design includes, among other things, a 10" woofer combined with a passive downward firing unit that handles the very lowest frequencies,