A great addition for your PSR-SX series keyboard! This compact subwoofer incorporates a number of Yamaha’s advanced, high performance bass technologies, including Twisted Flare Port and Advanced YST II (Yamaha Active Servo Technology II). Subwoofer for Keyboard instruments New Twisted Flare Port contributes to clear and tight bass Advanced YST II (Yamaha Active Servo Technology II) 20 cm (8”) cone woofer Stylish addition to any room
