Features
Astonishing Deep Bass response
The exclusive Yamaha Active Servo Technology (YST) optimizes the interaction of the amplifier, enclosure and speaker to produce deep bass that's impossible with conventional technology.

Powered Subwoofer
Add bass to your YST-M15, YST-M10, YST-M7 or YST-M8 speakers
The colors and finishes shown may vary from those on the actual products.
The exclusive Yamaha Active Servo Technology (YST) optimizes the interaction of the amplifier, enclosure and speaker to produce deep bass that's impossible with conventional technology.