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Polk Audio PSW108

Powered subwoofer

130 Reviews | 9 questions - 17 answers

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Item # 107PSW108

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Was: $199.99

Sale: -$50.00

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Our take on the Polk Audio PSW108

Add serious low-frequency impact to your movies and music with Polk's PSW108. This powered subwoofer delivers solid, accurate bass thanks to its 50-watt RMS amp and 10" woofer. The cabinet is constructed from non-resonant MDF, and is reinforced with internal bracing for superior bass clarity. The PSW108 is a great way to round out a home theater system or add depth to your stereo music without breaking the bank.

Add some boom to your room

Add serious low-frequency impact to your movies and music with Polk's PSW108. This powered subwoofer delivers solid, accurate bass thanks to its 50-watt RMS amp and 10" woofer. The cabinet is constructed from non-resonant MDF, and is reinforced with internal bracing for superior bass clarity. The PSW108 is a great way to round out a home theater system or add depth to your stereo music without breaking the bank.

Flexible inputs and controls

Polk makes it easy to integrate the PSW108 with your existing system. You can hook your receiver up to the sub either through the line-level or the speaker-level connections. The continuously variable low-pass crossover lets you dial in the sound to match the PSW108 to the rest of your speakers. And a phase switch lets you tweak the sub's output for more precise bass response.

I'm coming from having no sub. Loving the extra dimension to music/movies/shows. Good value to start my system.

Jon, Harrisburg, PA

What's in the Box:

  • Powered subwoofer
  • Grille (installed)
  • Owner's Manual
  • Online registration card

Product Highlights:

  • bass-reflex (ported) enclosure
  • 50-watt RMS amplifier
  • 10" front-firing driver
  • Dynamic Balance polymer composite cone
  • frequency response (-3dB): 40-160 Hz
  • crossover: continuously variable from 80-160 Hz
  • phase switch for more powerful and precise bass output
  • auto on/off
  • speaker-level and line-level inputs; speaker-level output
  • black oak vinyl finish
  • removable grille included
  • 14"W x 14-7/16"H x 16-1/8"D
  • warranty: 5 years woofer, 3 years amplifier
  • Our 60-day money-back guarantee

Polk Audio PSW108 Reviews

Average Customer Review(s):

(130 Reviews)
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Hands-on research

Features and Specs

Enclosure Bass Reflex
Video Shielded No
Woofer Size (inches) 10
Woofer Composition Composite polymer
Firing Direction Front
Wireless No
Preamp-Level Inputs Yes
Speaker-Level Inputs Yes
Speaker-Level Outputs Yes
Low-Pass Crossover Freq 80-160 Hz
High-Pass Crossover Freq None
Phase Switch Yes
Amplifier Output (watts) 50
Frequency Response 40-160 Hz
Height (inches) 14-7/16
Width (inches) 14
Depth (inches) 16-1/8
Weight 26 lbs
Speaker Parts Warranty 5 Years
Speaker Labor Warranty 5 Years
Amplifier Parts Warranty 3 Years
Amplifier Labor Warranty 3 Years

Product Research



10" Driver: The Polk Audio PSW108 uses a front-firing 10" composite polymer cone driver (with foam surround) for deep, accurate response with low distortion.

Klippel Optimized Woofer: By using a state-of-the-art Klippel Distortion Analyzer, Polk is able to optimize the woofer's motor structure, voice coil alignment and suspension for the best possible performance even at extreme listening levels.

Motor Structure: The PSW108 utilizes a powerful motor structure for a higher BL responses (the measure of the motive force applied to the cone) that results in louder, deeper and punchier bass.

Compression Circuitry: The woofer's Compression Circuitry limits distortion at high volume levels.

Amplifier: The subwoofer is powered by a high-current amplifier producing 50 watts RMS/100 watts dynamic power that supplies clean power for loud bass and a wide dynamic range necessary to recreate a life-like experience in your home.

Enclosure: The PSW108 features a bass-reflex enclosure with non-resonant MDF construction and internal bracing for deep bass impact with superior detail and accuracy. The Polk Audio PSW108 is available in a black wood-grain vinyl-wrapped finish.

Front-Firing Port: The powered subwoofer's front firing port allows the woofer to be extremely efficient and provides more bass impact for your home theater experience.

Not Video Shielded: The subwoofer is not magnetically shielded, so it is not recommended to place it next to tube TVs and video monitors. Though LCD, DLP and Plasma televisions are not affected by magnetism you should allow at least 18" of space between the subwoofer and any TV.

Placement: You may place the subwoofer anywhere in your room, but it will perform best when it's on the same side of the room as your system's front speakers. Also, placing the subwoofer near a wall or in a corner will increase its loudness.


Power Switch: The subwoofer has a 2-way power switch on the rear panel. When On/Auto is selected, the subwoofer turns on automatically when an input signal is received and off 15 minutes after the signal stops. The LED power indicator glows green when the unit is on and red when the unit is off.

Volume Control: The PSW108 has a rotary volume control to adjust the volume of the subwoofer relative to the other speakers in the system.

Phase Switch: The subwoofer's phase switch allows you to select 0-degrees (normal) or 180-degrees (reverse). If the bass sounds muddy or unclear, toggling the phase control can sometimes strengthen the bass attack.

Low-Pass Filter: The PSW108 offers a continuously variable low-pass filter, adjustable from 80-160 Hz.


Line Inputs: The PSW108 has gold plated left and right RCA line level inputs. If your receiver or processor has a single subwoofer line output, you can connect it to either the left or right line input jack. For receivers having subwoofer or stereo preamp outputs that do not contain their own low-pass crossover, the PSW108 will handle the low-pass filtering. If the receiver's subwoofer output or "LFE" output has a built-in low-pass filter, the PSW108's low-pass control should be turned fully clockwise (160Hz).

Note: The PSW108 does not have a dedicated LFE input.

Speaker Level Input/Output: The subwoofer has spring clips for the speaker level inputs and outputs. The subwoofer's low-pass filter sends bass frequencies (based on the setting of the filter) to the subwoofer. The speaker level inputs and outputs are shorted together, so the output is not crossed over. You should set you receiver's front speaker setting to Large.

Our Product Research Team

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Price [ Michael  May 31, 2017 ]
salesman Ryan [ Bothwell G.  May 25, 2017 ]
Price [ James  May 24, 2017 ]
Have enjoyed my Polk Audio PSW108 at home, buying this to replace base speaker at my lake house. Excellent sound and great price! [ Dale  May 23, 2017 ]
Polk reputation, positive reviews, on sale. [ Phil  May 23, 2017 ]
The ratings and reviews are good, can't wait to test it. [ Yader A.  May 23, 2017 ]
Price point and quality [ ANTHONY  May 22, 2017 ]
To repalace my current one [ Donald  May 21, 2017 ]
price point [ Ronald  May 02, 2017 ]
good reviews and great price [ Likness  Apr 27, 2017 ]
Brand, price point, and star rating was why I chose this model. [ Chad  Apr 24, 2017 ]
Low cost sub. [ Jerry  Apr 21, 2017 ]
Good quality for the price. [ vedor  Apr 04, 2017 ]
Replacing a 22 year old subwoofer. [ Marvin  Mar 27, 2017 ]
I did choose this speaker for it woofer size and my entertainment room size, both match perfectly for performance and bass resonance needs. Not to mention the price and free shipping as well. [ Rolando  Mar 07, 2017 ]
Bought this for the great price and terrific Polk quality reputation. Will pair great with my Polk Monitor 50 Series II floor standing speakers. [ MIKE  Mar 03, 2017 ]
Price and positive reviews [ Eric  Feb 26, 2017 ]
On sale.. and I wanted one. [ Phillip  Feb 12, 2017 ]
quality [ Rodney  Feb 09, 2017 ]
I thought it would be a good combo with the Polk bookshelf speakers I purchased, and the reasonable price. [ Matthew  Feb 05, 2017 ]
Needed some bass added to my system and I have always been satisfied with Polk. [ Gary  Feb 05, 2017 ]
Price and reveiws [ D  Feb 03, 2017 ]
price is right and it looked like it was chosen for this amp [ Larry Allan  Jan 30, 2017 ]
Does what I expected it to do -- provides great bass to my home theater. [ ALFREDO  Jan 22, 2017 ]
I read the reviews, and I like Polk audio products. [ Brent  Jan 15, 2017 ]
great value Love Crutchfield customer service [ ROBERT  Jan 08, 2017 ]
Did not pay much for it, so my expectations were not high. Would be best to use with tablet and multimedia speakers. Would recommend for decent high fidelity audio system. [ Jeffrey  Jan 07, 2017 ]
Price, size, availability [ Michael  Jan 05, 2017 ]
"Welp, recently upgraded my sound system. For the price and good reviews (plus 50 bucks off didn't hurt) figured I'd give this Polk subwoofer a try". [ Lisa  Jan 03, 2017 ]
The unit seemed to be a lot for the price. [ Robert  Dec 30, 2016 ]
Great product and price [ William  Dec 24, 2016 ]
Replaced an old M&K sub. It's affordable and was recommended by a friend. [ Rommel  Dec 18, 2016 ]
Good quality at a low price. I already own one, so this is a gift for my daughter! [ Douglas  Dec 13, 2016 ]
Great reviews and price! [ FELIX  Nov 28, 2016 ]
Top rated item that fit my budgetary constraints. [ Tyler  Nov 28, 2016 ]
Question as to sub or receiver being a problem, looks like a good reasonably priced replacement. Spoke with Buzz for assistance. [ Thomas  Nov 27, 2016 ]
gift [ John  Nov 25, 2016 ]
Price and great reviews. [ Johans  Oct 06, 2016 ]
Looking to enhance the feel of the music. Not looking to overpower, but this will provide just enough to my system. [ Jim  Sep 30, 2016 ]
Ringo selected this based on information I provided to him. Ringo's Bio: [ Mary  Sep 02, 2016 ]
Goes with my current Polk speakers. My subwoofer died several years ago. [ Thomas  Aug 31, 2016 ]
Liked the way you described the product in detail and feel you are very reliable company. [ Alma  Aug 21, 2016 ]
Best sub there is [ ISAAC A  Aug 03, 2016 ]
I've always loved the sound from Polks. [ Carol  Jul 23, 2016 ]
it fits in my cabinet below all of my home theater equipment. Plus all other equipment is polk. [ SCOTT M  Jul 04, 2016 ]
Great reviews - both on Crutchfield and other places; and very affordable for what I expect to get. [ John P.  Jun 29, 2016 ]
It had great reviews and a good price. [ J. Paul  May 30, 2016 ]
Sparky recommended Sparky's Bio: [ Kenneth  May 22, 2016 ]
Cheap subwoofer solution for occasional use to supplement outdoor speakers [ Michael  May 22, 2016 ]
wanted economical high quality auto-on sub [ Nelson  May 21, 2016 ]
Familiar with brand [ DENNIS T  May 15, 2016 ]
good reviews and recommended by tech [ MICHAEL  Apr 29, 2016 ]
Chosen by specifications to approximate a unit to be replaced in an existing system.. [ David  Apr 18, 2016 ]
Quality [ John D.  Mar 28, 2016 ]
It's was the top seller and inexpensive. Suits my needs [ Joe  Mar 14, 2016 ]
Used in home theater in a 7.2 setup. [ TIM  Feb 22, 2016 ]
my older sub was blown and with the new one in place could not be better along with my new center speaker [ Harold  Feb 01, 2016 ]
Fabulous sound [ Ryan  Jan 29, 2016 ]
price and good reviews [ Richard  Jan 11, 2016 ]
was looking for a subwoofer with line and and line out speaker level inputs. good price. good reviews. [ Patty  Dec 28, 2015 ]
Like the price and like polk speakers [ WILLIAM J  Dec 27, 2015 ]
Good price point for the product, and good reviews helped my decision. [ Paul  Dec 27, 2015 ]
Great price on a great product. [ Philip  Dec 26, 2015 ]
It was exactly what I had been looking for. I'm glad my search journey brought me to Crutchfield. [ Nancy  Dec 22, 2015 ]
I did not have one. I tgoes with my existing Polk towers. [ Joseph  Dec 21, 2015 ]
liked it [ john  Dec 21, 2015 ]
Rated highly and great price. [ GERARD E  Dec 20, 2015 ]
Good product name, good reviews, good price point. Will give it a try. [ RICHARD J  Dec 08, 2015 ]
powered and price [ STEVE  Dec 06, 2015 ]
This was for sound system/TV. Have two mains. Polk smaller floor towers--needed more bass! sound excellent together. [ STEVEN  Dec 03, 2015 ]

9 questions already asked

it's a simple matter of the POLK's inputs vs the soundbar's outputs. I could take the time to google your soundbar, but it should be an easy exercise for you. Wish you the best in your tech research, please let us know how it ended up. [ PAUL  Sep 26, 2016 ]
Gage R. Does your Sony ht-ct380 have a output jack on the unit to drive a sub woofer? If so yes - if not this is a question for Sony [ BILL  Sep 25, 2016 ]
I you have a subwoofer input on the surround system, yes [ ANTHONY  Mar 11, 2016 ]
I forwarded your question to an Advisor and they responded with the following: Yes, the speaker level outputs are designed to pass through the signal and power from the speaker level inputs on the Polk PSW-108. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy  Oct 05, 2015 ]  Staff
Absolutely. You would simply run a subwoofer (RCA style) cable from the Subwoofer Pre-out on the back of the Denon receiver to the Line In on this subwoofer. [ Jeff  Mar 18, 2015 ]  Staff
Thanks for your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine if this will work and help you make the best choice for your system and your budget. [ Krissy  May 06, 2014 ]  Staff
Yes, it should be fine, use a quality RCA cable. I have this with the Polk RM7 set and it makes all the difference in the sound. [ BRADY L  Dec 25, 2013 ]
Yes, this sub will work with A/V receivers with a single sub out jack. You connect the sub out from your receiver to one of the sub's input jacks and leave the other open. My Yamaha is connect like that. [ JAMES F  Dec 22, 2013 ]
Yes, you can wire the sub with just one phone plug. I believe that a subwoofer is mono anyway. You can also run speaker wire from the right/left speaker to the sub as well. [ LESLIE NEIL  Dec 21, 2013 ]
I have a single our on my Denon AV 1913 and it works great. Good luck. Don [ DONALD J  Dec 21, 2013 ]
I do not know about the soundbar, I still use a receiver, but the PSW108 has been a joy for watching movies and listening to music. [ STEPHEN R  Dec 13, 2013 ]
If the soundbar has a sub pre out jack.Most do have it. [ MICHAEL T  Dec 10, 2013 ]

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

Polk Audio PSW110 (BK)

Get more power and bass

The Polk Audio PSW110 offers these features:

a 100-watt high-current amplifier for more powerful lows with your movies and music

a separate LFE input for connection to a receiver's subwoofer output