Description: Subwoofer, 1-Way, Cable / Get powerful bass sounds from the 100W Yamaha YST-SW011 subwoofer with Advanced Y.S.T. and Q.D.Bass technology. QD bass uses down-firing drivers with square reflective plates to radiate the sound effectively in four horizontal directions. The reflective plates negate any effects caused by the floor surface and reduce resonance between soundwaves reflected from the floor and the unit. Get the ultimate sound from your Home Cinema System with the help of the YST-SW011 subwoofer.