Yamaha YST-SW225

Powered subwoofer

  • Yamaha YST-SW225


  • Yamaha YST-SW225


  • Yamaha YST-SW225


Item #: 022YSTW225

Review Summary

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Original price $249.99
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Our take on the Yamaha YST-SW225

by Amanda P.

Why add a powered subwoofer?

A powered subwoofer gives you bass you can feel as well as hear. Our customers love the depth and impact their subs add to music and movies. We hear comments like "it brings out sounds I didn't know existed in discs I've watched a million times." Powered subwoofers aren't just for big bass that rattles your picture frames; they can also deliver tight, accurate lows. If you haven't shopped for a powered sub in a while, you might be surprised at how small they get. Look for an ultra-compact model if you want to tuck your sub away under an end table or in a corner.

Experience exciting, full-bodied bass with Yamaha's YST-SW225. Its 8" woofer and 120-watt amplifier work together, adding powerful lows to your movies, music, TV shows, and video games. And this capable sub's advanced circuitry enables the driver to move more precisely — you'll enjoy accurate bass that sounds smooth and natural.

See more info on this item


  • bass-reflex (ported) enclosure
  • video-shielded
  • 120-watt amplifier
  • 8" down-firing woofer
  • frequency response 28-200 (-10dB)
  • continuously variable 50-150 Hz crossover
  • Advanced YST II negative impedance converter for more accurate bass response
  • QD-Bass Technology
  • phase switch
  • auto on/off
  • speaker-level and line-level inputs
  • black finish
  • 11-7/8"W x 13-7/8"H x 13-3/4"D
  • warranty: 2 years
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Bass Reflex
Video Shielded
Woofer Size (inches)
Woofer Composition
Not given
Firing Direction
Preamp-Level Inputs
Speaker-Level Inputs
Speaker-Level Outputs
Low-Pass Crossover Freq
50-150 Hz
High-Pass Crossover Freq
Phase Switch
Amplifier Output (watts)
Frequency Response
28-200 Hz
Height (inches)
Width (inches)
Depth (inches)
Speaker Parts Warranty
2 Years
Speaker Labor Warranty
2 Years
Amplifier Parts Warranty
Amplifier Labor Warranty
Product Research
What's in the box?

Download owner's manual

  • YST-SW225 Powered subwoofer
  • Sheet of 4 self-adhesive non-skid pads
  • Owner's manual
  • Limited Warranty sheet
  • On-line product registration sheet

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Inputs and Outputs Notes
Specification Note


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 response.

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 music listening.

Driver: 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.

Enclosure: The 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 clearly.

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 Hz.

Phase Switch: 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".

Auto Standby: This function automatically switches the unit between standby and power-on modes.

  • 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.

Volume Control: You can adjust the volume level of the subwoofer to match the level of sound from the other speakers in your application.

Inputs and Outputs Notes

Line 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.

Speaker 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.

Specification Note


  • Frequency Response: 28 Hz - 200 Hz
  • Driver: 8" video shielded cone woofer
  • Amplifier: 120 Watt rated at 100 Hz, 5 Ohms,10% THD
  • Power Consumption: 65 W
  • Standby Power Consumption: 0.5 W
  • Power Supply: AC 120V, 60 Hz
  • Weight: 25 lbs. 60 oz.


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Yamaha YST-SW225 Reviews

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5 out of 5

Excellent fit for any room and system

Written By Bill, Fayetteville NY on Saturday, January 10, 2009
Crutchfield Customer Review (What's this?)
Installed this system to 5 rooms and my customer was so impressed he
wanted more installed. With the controls in the rear your able to tailor the
bass for any room and level you need. It has the power to handle any
situation inside. Sounds awesome with Bose inside speaker systems.
2 out of 2 people found this helpful
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4 out of 5

a good sub

Written By no, denver.CO on Wednesday, January 09, 2008
the yst-225 is a nice sounding sub i have had my sub for like 7 years and it sounds like it did when i bought it. it may not seam like it will hit realy low but it hits some frequencys that you cant eaven hear only feal it is a kick in the pants cuz people think that it wont hit hard and then it dose.
33 out of 58 people found this helpful
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Add accessories for the Yamaha YST-SW225

A better cable will give your subwoofer the tools it needs to recreate the deep bass on your music and movies. Cable is not included with this sub. See all categories & accessories

Monster Cable® 600sw Subwoofer cable (4 meters/13.2 feet)
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CableTruth 303S Subwoofer cable (9 ft.)
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Monster Cable SuperFlat™ Mini Decor-friendly speaker cable with gold pin connectors (50-foot spool)
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AudioQuest X2 Speaker Cable 14-gauge cable, connectors optional (50 feet, White)
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AudioQuest G2 Speaker Cable 16-gauge cable, connectors optional (50 feet, Gray)
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For a more in-depth review and enhanced detailed information on the Yamaha YST-SW225, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_022YSTW225/Yamaha-YST-SW225.html ).