Advanced Yamaha Active Servo Technology Ii; Troubleshooting - Yamaha NS-SW210 Bedienungsanleitung

ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY II

In 1988, 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 reflex method. This allows for bass
reproduction from much smaller cabinets than was
previously possible.
High-amplitude
bass sound
Refer to the chart below if this unit does not function properly. If the problem you are experiencing is not listed below, or
if the instructions given below do not help, disconnect the power cord and contact an authorized YAMAHA dealer or
service center.
Problem
Power is not supplied even though the
POWER switch is set to the ON
position.
No sound.
Sound level is too low.
4
En
Cabinet
(Helmholtz resonator)
Port
Advanced impedance
Converter
Processing
Signals of low amplitude

TROUBLESHOOTING

Cause
The power plug is not securely
connected.
The volume is set to minimum.
Speaker cables are not connected
securely.
A source sound with little bass
frequency content is being played.
It is influenced by standing waves.
Yamaha's newly developed Advanced YST II adds many
refinements to Yamaha Active Servo Technology,
allowing better control of the forces driving the amplifier
and speaker. 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, without any murkiness.
Air woofer
Active
Servo
Amplifier
What to Do
Connect it securely.
Raise the volume up.
Connect them securely.
Play a source sound with bass
frequencies.
Reposition the subwoofer or break up
parallel surfaces by placing bookshelves,
etc., along the walls.
Signals