YST-SW1000

A subwoofer system that features Yamaha’s proprietary Yamaha Active Servo Technology (YST) for reproducing sounds in the ultra-low range (as low as 16 Hz).
This system features an exclusively developed 30-cm cone woofer and an aluminum die-cast frame.
The enclosure uses a GT rack of 50-mm-thick high-density particle board for the top, bottom, and sides.
The full-scale power amp is built-in with a 150-W power transistor for discrete output.