Advanced Yamaha Active Servo Technology Ii - Yamaha YST-FSW150 Bedienungsanleitung

Advanced Yamaha Active Servo Technology II

In 1998, Yamaha brought to the marketplace
speaker systems utilizing YST (Yamaha Active
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 impedance drive of the amplifier and
resonance generated between the speaker cabinet
volume and port, it creates more resonant energy
(the "air woofer" concept) than the standard bass
High-amplitude
bass sound
Signals of low
amplitude
6
En
Cabinet
Air woofer
(Helmholtz resonator)
Port
reflex method. This allows for bass reproduction
from much smaller cabinets than was previously
possible.
Yamaha's newly developed Advanced YST II, with
many refinements to Yamaha Active Servo
Technology, allows better control of the forces
driving the amplifier and speakers. From the
amplifier's point of view, the speaker impedance
changes depending on the sound frequency.
Yamaha developed a new circuit design combining
negative-impedance and constant-current drives,
which provides a more stable performance and
clear bass reproduction with less murkiness.
Signals
Active Servo Processing
Amplifier
Advanced
impedance
Converter