Yamaha YST-SW800 Subwoofer Speaker

The new YST-SW800 subwoofer is the best that Yamaha has to offer. New design, new technology, and a new dimension of power bass performance! It uses Yamaha's Advanced YST, a unique system in which the speaker and amplifier work together to cancel out impedance so the speaker unit has a perfectly linear motion. As well as brandnew technologies such as QD-Bass to deliver exceptionally crisp, clean, powerful bass. QD-Bass (Quatre Dispersion Bass) technology uses down-firing drivers with square, pyramid-shaped reflective plates to radiate the sound efficiently in four horizontal directions. YST-SW800 has extremely efficient, high-power amplifiers built in, new power supply technology and a driver featuring a Dual-Bias system with a 100mm (4") diameter voice coil for the ultimate in power and performance.