Owner's Manual
Page 18
... view, the speaker impedance changes depending on the sound frequency. Yamaha's newly developed Advanced YST II adds many refinements to give powerful, high quality bass reproduction. ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY II In 1988, Yamaha brought to the marketplace speaker systems utilizing YST (Yamaha Active Servo Technology) to Yamaha Active Servo Technology, allowing better control of the forces driving...
... view, the speaker impedance changes depending on the sound frequency. Yamaha's newly developed Advanced YST II adds many refinements to give powerful, high quality bass reproduction. ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY II In 1988, Yamaha brought to the marketplace speaker systems utilizing YST (Yamaha Active Servo Technology) to Yamaha Active Servo Technology, allowing better control of the forces driving...