Yamaha YST-SW225 User Manual

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• This subwoofer system employs Advanced Yamaha 

Active Servo Technology II which Yamaha has 
developed for reproducing higher quality super-bass 
sound. (Refer to page 14 for details on Advanced 
Yamaha Active Servo Technology II.) This super-bass 
sound adds a more realistic, theater-in-the-home effect 
to your stereo system.

• This subwoofer can be easily added to your existing 

audio system by connecting to either the speaker 
terminals or the line output (pin jack) terminals of the 
amplifier.

• For the effective use of the subwoofer, the subwoofer’s 

super-bass sound should be matched to the sounds of 
your front speakers. You can create the best sound 
quality for various listening conditions by using the 
HIGH CUT control and the PHASE switch.

• The Automatic power-switching function saves you the 

trouble of pressing the STANDBY/ON button to turn the 
power on and off. 

• You can select bass effect suitable for the source by 

using the B.A.S.S. button. 

• This subwoofer system is equipped with a linear port 

unique to Yamaha that provides smooth bass response 
during playback, minimizing extraneous noise not 
included in the original input signal.

After unpacking, check that the following parts are 
contained.

Non-skid pads

QD-Bass Technology
QD-Bass (Quatre Dispersion Bass) technology is a 
Yamaha unique technology to radiate the sound 
efficiently in four horizontal direction.

YST-SW225UB.book  Page 2  Tuesday, July 27, 2004  10:25 AM