AdvancedYamahaActiveServo TechnologyII
In 1998, Yamaha brought to the marketplace speaker systems utilizing YST (YamahaActive Servo Technology) to give powerful, high quality bass reproduction. This technique uses a direct connection between the amplifier and speaker, allowing accurate signal transmission and precise speaker control.
As this technology uses speaker units controlled by the negative hnpe&mce drive of the amplifier and reson_mce generated between the speaker cabinet volume and port, it creates morn resonant energy (the "air woofer' concept) than the standard bass
_Cabinet
reflex method. This allows for bass reproduction from much smaller cabinets them was previously possible.
Yamaha's newly developed Advmlced YST II adds many refinements to Yam_flm Active Servo Technology, allowing better control of the forces driving the amplifier and speaker. From the ampfi- fier's point of view, the speaker impedance changes depending on the sound frequency. Yamaha developed a new circuit design combining
which provides a more stable performance and
clear bass reproduction without any murkiness.
Air woofer
(Helmholtz resonator) | |
bass sound | Port |
| Advanced impedance |
| Converter |
\
Signals
Processing _,_
Amplifier
Active Servo I
I
Signals of low amplitude
