Boston Acoustics ASW 250

Powered subwoofer (A Series)

Item #: 065ASW250

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Play your movies and music loud and low with Boston Acoustics' ASW 250 powered subwoofer. It's specially designed 10" ceramic/glass fiber polymer woofer teams up with a built-in 100-watt amplifier for powerful, dynamic bass. And Boston's exclusive signal-monitoring circuitry keeps audible distortion at bay, so the low frequencies stay clear and accurate.

The ASW 250 also uses vertical and horizontal internal bracings to reduce unwanted resonance that can muddy the sound. Plus, as part of Boston's A Series of speakers, it features a distinctly modern style with a stunning high-gloss, scratch-resistant cabinet and a textured top panel for contrast.

Build a complete A Series speaker system by pairing this sub with any combination of A 250 or A 360 floor-standing speakers, A 25 or A 26 bookshelf speakers, and the A 225C center channel speaker.

Product Highlights:

  • frequency response 35-150 Hz (±3dB)
  • 100 watts RMS amplifier (250 watts peak)
  • BassTrac® circuitry eliminates distortion
  • 10" ceramic/glass fiber polymer woofer
  • Deep Channel® Design for more bass from less amplifier power
  • bass-reflex (ported) design
  • continuously variable 40-180 Hz crossover
  • phase switch
  • auto on/off
  • LFE and line-level inputs
  • scratch-resistant high-gloss side panels with contrasting textured top panel
  • 14-11/16"W x 14"H x 17-5/8"D
  • weight: 32 lbs.
  • warranty: 5 years speaker, 1 year amplifier
  • Our 60-day money-back guarantee

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.

Hands-on research

What's in the box?

Download owner's manual

  • 10" Powered subwoofer
  • 6' AC power cord
  • Owner's Manual

Product Research

Features
Controls
Connections

Features

A-Series Powered Subwoofer: The Boston Acoustics A-Series powered subwoofer (ASW 250) incorporates high-quality components that produce the legendary Boston Sound. The A-Series powered subwoofer is ideally suited for use in a high-quality 5.1 channel home theater or stereo music system. The powered subwoofer is capable of impressive deep bass and high output from a  compact enclosure.

Bass Trac Circuitry: The Boston Acoustics ASW 250 powered subwoofer features Bass Trac Circuitry, a proprietary Boston-designed circuit that tracks the input signal to the subwoofer and prevents its amplifier from being driven into audible distortion. As a result, the bass stays clean and strong at any listening level.

10" DCD Woofer: The Boston Acoustics ASW 250 powered subwoofer is fitted with a down-firing 10" ceramic/glass fiber polymer woofer cone with Deep Channel Design (DCD) that allows for higher speed, reduced distortion, and improved sensitivity.

250-Watt (Peak) Amp: The Boston Acoustics ASW 250 employs a built-in 100 watt RMS (250W Peak) amplifier to drive the preloaded 10" DCD woofer.

Crossover Network: The crossover components in the ASW 250 incorporate low-loss film capacitors and low-distortion laminated silicon steel cores for the inductors in all critical areas.

Bass Reflex Enclosure: The Boston Acoustics A-Series powered subwoofer (ASW 250) features a bass reflex enclosure with a down-firing acoustically tuned port for improved low frequency response and efficiency.

Scratch Resistant, Resonance Free Cabinet: The Boston Acoustics ASW 250 powered subwoofer features a high-gloss, scratch-resistant cabinet with a textured top for a modern styling that will match most any decor. Vertical and horizontal internal bracings reduce cabinet resonances for enhanced audio quality.

Placement: Place the powered subwoofer next to a wall or in a corner near your main speakers. The sound is typically best when the subwoofer is within 15' of the main speakers. The sharp 24dB/octave crossover roll-off permits placement farther from the main speakers if necessary. Since the ear is unable to localize the low frequencies of the subwoofer, the bass still appears to come from the main speakers. Experimentation is key, however most positions in the room will work well.

Controls

Volume Control: The Boston Acoustic ASW 250 features a rear-panel rotary volume control. Simply adjust the powered subwoofer's volume control until you hear a match between your main speakers and the subwoofer. Bass response should not overpower the room, but rather be adjusted so there is a natural blend across the entire musical range.

Crossover Control: When using the line-level inputs of the powered subwoofer, the ASW 250's built-in variable crossover (4-180Hz) is engaged. As a starting point, set the crossover control on the subwoofer approximately 10Hz higher than the lower limit of your main speakers' bass response. Fine-tune the crossover setting by ear for the smoothest blend with your main speakers. The best setting of the crossover control will depend on speaker placement and personal preference.

Note: This control is not active when using the LFE input jack.

Polarity Control:  The polarity control switch lets you select normal (0°) or inverted (180°) phase for the powered subwoofer. Set this switch to provide the fullest, most dynamic bass. The effect of phase will be most audible on low-frequency percussion instruments or music with a continuously repeating bass line.

On/Off Switch: The ASW 250 features a main on/off switch and 3 power settings.

  • Audio On: The powered subwoofer is always on.
  • Auto: The powered subwoofer will turn on whenever a signal is detected. If no signal is detected after several minutes, it will automatically enter the Mute mode.
  • Mute: The powered subwoofer is muted and will not produce any sound. You may turn off the main power witch, if you will not be using for some time or which to conserve electricity.

Note: Power is always supplied to the powered subwoofer's electronics unless it is unplugged or the main switch is powered off. The auto-on circuitry only activates or deactivates the power amplifier.

Connections

LFE/Line-Level Inputs: The Boston Acoustics ASW 250 powered subwoofer is fitted with LFE and Line-Level inputs for connection flexibility to your home receiver.

  • LFE: The ASW 250 powered subwoofer is equipped with a dedicated LFE input to connect a multichannel home theater AV receiver with a dedicated subwoofer channel to reproduce the special low-frequency effects (LFE) information contained in digitally-encoded soundtracks. In this case, you will use your AV receiver's built-in crossover adjustments, and not the ASW 250's crossover control
  • Line-Level: If your receiver does not have a dedicated subwoofer or LFE output, you can connect the powered subwoofer to a preamp or line-level RCA output on your receiver. In this case, you will use the crossover control on the ASW 250.

Note: There are no speaker-level connections.

AC Cord: The ASW 250 includes a 6' detachable AC power cord. The powered subwoofer's AC power cord should be plugged into an AC wall outlet or surge protector. Do not use the outlets on the back of your AV receiver.

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.

Boston Acoustics ASW 250 Reviews

Average Customer Review:

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Boston Acoustics ASW 250

Written By Bill A, Dearborn , Mich on Thursday, June 27, 2013

Crutchfield Customer Review (What's this?)

I am very happy with my Boston Acoustics Sub . I especially like the seperate volume control , I like more bass for a movie and less for listening to music . I do not watch much TV or many movies , it is great for my music system . It replaced an older sub that died , it was great to get a sub woofer back . You really notice when itwas gone and you get thatdeep bass back .

Pros: Big sound , nice size enclosure .

Cons: none

Boston Acoustics ASW 250

Written By robp, pittsburgh on Sunday, January 20, 2013

Crutchfield Customer Review (What's this?)

first system with subwoofer..wow!

Pros: compact

Cons: complex controls

Go big or go home

Written By Billy, memphis on Friday, October 26, 2012

Crutchfield Customer Review (What's this?)

Its a great sub. Very pleased with the sound. One complaint, I should have gone with the bigger sub from Boston Acoustics. Don't get me wrong, this sub rocks, and I got exactly what I paid for. But I would have liked a little more amperage, so when you look at subs, don't under-putt on your purchase. Go a little bigger vs smaller. If you want GREAT sound at a GREAT price and your not looking to blow out the windows, this is a fantastic sub. Excellent for movies and most music. But if you want knee wobbling thump that wakes the neighbors, get the ASW650.

Pros: Great sound. Great for movies. Good for music.

Cons: None, unless you are looking for ear bleeding bass. Then go bigger.

Boston Acoustics ASW 250

Written By ethbuck, Newport News, Va on Monday, February 27, 2012

Crutchfield Customer Review (What's this?)

The sub definitely has a good sound however if you have it on a carpet you will need to raise it about 2.5 inches, if not you won't appreciate the output.

Cons:

Boston Acoustics ASW 250

Written By Anonymous, Houston, TX on Monday, January 16, 2012

Crutchfield Customer Review (What's this?)

I have a LARGE living room and this subwoofer FILLS IT UP!

Boston Acoustics ASW 250

Written By mookiemoz, Florida on Friday, August 12, 2011

Crutchfield Customer Review (What's this?)

Good bang (boom) for the buck.

Get everything you’ll need to enjoy your new Boston Acoustics ASW 250

Use a high-quality subwoofer cable for bass that draws you into your movies and music. A cable is not included with this sub.
Protect your investment from power surges and interference.
Have your new equipment installed by qualified professionals.
If you're going to connect your sub to your receiver with the speaker level inputs, you're going to need speaker wire. You may also want to add connectors. Wire is not included with this sub.
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Questions & Answers Ask the community. Share your knowledge.

Looking for more? Check out the next model in this lineup.

Boston Acoustics ASW650

Boston Acoustics ASW 650

Out of Stock

$499.99

Add to Cart

Enjoy more powerful bass

The Boston Acoustics ASW 650 offers these features:

has a built-in 300-watt RMS amplifier

reproduces bass down to 28 Hz