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Polk Audio PSW108

Powered subwoofer

Item # 107PSW108

Add serious low-frequency impact to your movies and music with Polk's PSW108.

Add serious low-frequency impact to your movies and music with Polk's PSW108.

Discontinued item
10 questions - 19 answers

Item # 107PSW108

About the Polk Audio PSW108

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.

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.


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
  • MFR # AM1081-A

What's in the box:

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

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More details on the Polk Audio PSW108

Stacey B.

Features & 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.

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Customer Q&A

10 questions already asked

Can this subwoofer be used outdoors?
[ Drew  Jul 12, 2017 ]
2 answers
If you're in a humid area I would not, the box is engineered wood. Even so, I probably would invest in a marine model just to be sure
[ En  Jul 13, 2017 ]
[ BRYAN  Jul 13, 2017 ]
Can I hook this up to a Sony ht-ct380?
[ Gage  Sep 23, 2016 ]
2 answers
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 ]
Can I hook it up with Sony wireless surround system?
[ Timothy  Mar 10, 2016 ]
1 answer
I you have a subwoofer input on the surround system, yes
[ ANTHONY  Mar 11, 2016 ]
Will the speaker level outputs work with the line level inputs?
[ Dustin  Sep 27, 2015 ]
1 answer
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
I was wondering if this speaker will hook up to The Denon AVR-S500BT, if so how?
[ glenn  Mar 18, 2015 ]
1 answer
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
Will this sub work with a dennon 1912 dennon receiver?
[ eddieantuna  May 06, 2014 ]
1 answer
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
My receiver only has a single signal out for sub. Not red and white. Will this sub work on it? It is a pioneer vsx-821.
[ Mark-Michelle  Dec 21, 2013 ]
4 answers
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 S.  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 ]
Can this subwoofer work with a Yamaha YSP-1400 soundbar? I am looking to get rid of my receiver and use my current sub with a new soundbar.
[ Richard  Dec 09, 2013 ]
2 answers
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.
[ New User  Dec 10, 2013 ]

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