Page 1
Advanced YST Advanced Yamaha Active Servo Technology (Advanced YST) is a unique system in which the speaker and amplifier work together to cancel out impedance so the speaker unit has a perfectly linear motion. Advanced YST helps to ensure the highest levels of sound pressure and overall performance.
Page 2
Sensitivity: 85 dB/2.83 V/1 m Impedance: 6 ohms...