 | Yamaha's Patented Advanced Active Servo Technology (Advanced YST II) generates incredible Bass from small speaker enclosures. Its advanced negative impedance converters intelligently adjust the negative impedance generation as the speaker moves, creating a hard, rigid cone that prevents deep resonant waves from leaking out of the speaker cone. Cable, Subwoofer, Magnetically Shielded Number of Reviews: 1 | Ratings:  | Best deal: $170
$170 - $250 from 3 stores. |