Inputs and Outputs Notes
Overview: The Yamaha YST-SW225 is a powerful subwoofer
with advanced technology for top-class sound quality. The bass reflex enclosure
houses an 8" woofer with a 120 watt amplifier.
Advanced YST Technology II:
The Advanced Yamaha Active Servo Technology 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. By doing this, the YST-SW225 ensures the highest
levels of sound pressure and overall performance.
QD Bass Technology: The Quatre Dispersion Bass technology uses
down-firing drivers with square, pyramid-shaped reflective plates to radiate the
sound efficiently in four horizontal directions. The reflective plates negate
any effects caused by the floor surface and reduces resonance between sound
waves reflect from the floor and the unit giving you clean and accurate bass
Linear Port Design:
The YST-SW225's bass reflex enclosure uses a linear port to minimize extraneous
noise which helps offer distortion free bass notes.
High Dynamic Power:
The amplifier used in the YST-SW225 is capable of delivering large amounts of
reserve power for accurate reproduction of high energy peaks needed for those
extreme action movie moments that require a heavy dose of bass. This technology
also emphasizes the dynamic qualities and provides a sharper sound image for
The YST-SW225 use an 8" multi-range woofer to create tight and accurate bass.
The 8" woofer is also video shielded so you can place the unit close to your TV
without harming the Television.
YST-SW225 uses a bass reflex (ported design) enclosure to provide efficient and
powerful sounding bass.
BASS: The Bass
Action Selector System allows you to adjust the subwoofer's bass response based
on whether you are watching a movie or listening to music. When the button is
pressed "In" the YST-SW225 is in music mode and when the button is pressed "Out"
the unit is in movie mode.
- Movie: In
movie mode the low-frequency effects are enhanced to all for more powerful
sound. The sound will be thicker and deeper.
- Music: In
music mode the excessive low-frequency components are cut off to make the
sound clearer. The sound will be light and reproduces the melody line more
High Cut Filter: You can simplify the signal path from your receiver to the
YST-SW255 to reduce sound deterioration by turning off the crossover controls of
the powered subwoofer. You would want to use this when your receiver has a
dedicated LFE or subwoofer output with its own internal crossover.
High Cut Control: The High Cut Control is the low pass crossover adjustment for the
YST-SW225. When turned on you can select between 50 Hz to 150 Hz as your
frequency cut off point. Frequencies higher than the selected frequency are cut
off from the subwoofer so you can accurately reproduce low frequencies without
any high frequency interference. One graduation of this control represents 10
For the most effective use of the subwoofer the Phase Switch can be adjusted to
match the sound phase of your front speakers. You can select between "Norm"
(normal) or "Rev" (reverse). Select the better position by monitoring you
system. The default setting is "Rev".
This function automatically switches the unit between standby and power-on
- The subwoofer automatically places itself in
standby mode if it does not receive an input signal for 7 or 8 minutes. The
power indicator will turn to red in standby mode.
- When the subwoofer detects a bass signal
input of below 200 Hz, it automatically places itself in power-on mode. the
power indicator will turn green when power is on.
You can adjust the volume level of the subwoofer to match the level of sound
from the other speakers in your application.
Inputs: The subwoofer has gold
plated left and right RCA Line Level inputs. These
inputs are for use with electronics featuring unfiltered or filtered "Pre Out" jacks. It may
require "Y adapters" to connect the left and right outputs of the pre-amp
processor to both the subwoofer and the power amplifier.
Level Input/Output: The subwoofer has
spring clips for the speaker level input and output. The
subwoofer's low-pass filter takes the low frequencies (based on the setting of
the filter) and passes the low frequencies out to the subwoofer while it passes
the signal above that setting out to your speakers.
- Frequency Response:
28 Hz - 200 Hz
8" video shielded cone woofer
120 Watt rated at 100 Hz, 5 Ohms,10% THD
- Power Consumption:
- Standby Power
Consumption: 0.5 W
- Power Supply: AC 120V, 60 Hz
25 lbs. 60 oz.
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