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Polk Audio

Polk Monitor XT12 Powered Sub - 12" Balanced Woofer & 100W Class A/B Amplifier, Low-Resonance MDF Cabinet & Removable Grille, Dolby Atmos & DTS:X Compatible, Home Theater Subwoofers, Midnight Black

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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Mar 12
Order within 15 hours and 51 minutes
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Style: 12" Subwoofer (XT12)


Features

  • POWERFUL SUB FOR EFFORTLESS BASS - The Polk Monitor XT12 Subwoofer and amp package features a long-throw, high excursion 12" Dynamically Balanced Woofer powered by a 100W Class A/B Amplifier; delivering bass down to 24Hz for music, movies, games
  • PREMIUM BUILD QUALITY AND MODERN DESIGN - An upgrade to the acclaimed Monitor series, the Polk Monitor XT series features innovations in affordable, great sounding speakers; their stylish design blends with any home decor
  • DISTORTION-FREE AUDIO - The MXT12 12 inch subwoofer is housed inside a rigid, critically braced MDF cabinet with a removable, precision-fit grille that isolates woofer sound; minimizing resonances and sonic interference for pure sound
  • VERSATILE COMPATIBILITY & CONVENIENT CONTROLS - This Polk Audio subwoofer is compatible with the latest Dolby Atmos & DTS:X AV receivers; fine tune MXT12 with volume, variable crossover (80-160Hz) and phase polarity (0/180) control
  • NUMEROUS CONNECTION OPTIONS - The MXT12 subwoofer perfectly complements most home theater systems. Easily connect your receiver with this subwoofer via line level RCA, LFE (unfiltered/low pass disabled) and nickel plated 5-way binding post inputs
  • ADD A SECOND SUB FOR RUMBLING AUDIO The timbre matched Polk components ensure seamless speaker-to-speaker blending with other Monitor XT speakers. Add another same-model Polk subwoofer for more bass and uniform low frequencies throughout the room

Description

The Polk Monitor XT12 powered subwoofer is outfitted with a 12” Dynamic Balanced Woofer and 100 W peak Class A/B amplification; delivering loud, low, effortless bass. Audiophiles, homeowners, or anyone who is a gamer can enjoy movies, music, and gaming; with more impact, amazing speed, and control even at 24 Hz. Built-in controls for volume, variable crossover (80–160 Hz), and phase polarity (0/180) allow quick room tuning. The home audio subwoofers have a rigid, low-resonance cabinet that keeps each note clean; while the driver moves ample air for truly deep bass. Easily integrated into any home theater or music listening environment. Featuring new woofer, amplifier, and cabinet designs—the MXT12 12 inch subwoofers fulfill the Polk promise of great sound for all. Add another, same-model subwoofer to your setup to improve realism, smooth peaks and dips; deliver even bass for every movie and song.

Brand: Polk Audio


Speaker Maximum Output Power: 100 Watts


Frequency Response: 40 KHz


Connectivity Technology: RCA


Audio Output Mode: Surround


Mounting Type: Floor Standing


Material: Engineered Wood


Model Name: MXT12


Speaker Type: Subwoofer


Special Feature: Dolby Enabled


Recommended Uses For Product: For Surround Sound Systems


Compatible Devices: Home Theater


Subwoofer Diameter: 12 Inches


Unit Count: 1.0 Count


Surround Sound Channel Configuration: 5.1


Color: Black


Included Components: Speaker


Product Dimensions: 16"D x 18"W x 16"H


Item Weight: 39 Pounds


Impedance: 4 Ohms


Is Waterproof: False


Warranty Type: Full


Number of Items: 1


Control Method: Remote


Wireless Communication Technology: No Wireless Communication Technology


Speaker Size: 12 Inches


Power Source: Corded Electric


Woofer Diameter: 12 Inches


Water Resistance Level: Not Water Resistant


Audio Driver Type: Dynamic Driver


Audio Driver Size: 12 Inches


Subwoofer Connectivity Technology: Wired


Specific Uses For Product: Home Entertainment Systems, Surround Sound Setups


UPC: 747192135058


Style: 12" Subwoofer (XT12)


Manufacturer: Polk


Shape: rectangular prism


Set Name: Monitor XT


Item Weight: 39 pounds


Item model number: MXT12


Is Discontinued By Manufacturer: No


Date First Available: August 24, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Mar 12

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Looks good and great features/sound for the price
Style: 10" Subwoofer (XT10)
This sub is great for the price. Get it on black friday and save some money. Most of the equivalent subs of this size are 300+ bucks. A little misleading though, measuring from the edge of the rubber from one side to the other side of the speaker is about 8 inches not including the 1/4 in area for the screw holes. So to me this is more of a 8” sub and overall is the size of yamahas 8” sub. Not complaining though, i do like the more compact size as subs used to have huge heavy boxes in the past. This one says 23lbs so not bad overall. Its your typical black vinyl veneer look and comes with power cord and instructions. Basic controls are power switch, phase switch, volume, low pass filter and the lfe or stereo rca jack inputs. Most people will like the phase switch at 0 as it matches their other speakers phase, but i say try both ways and see what you like. Thats it and its simple and perfect for entry level sound systems. You will need a sub cable which is a single rca male to rca male. Im using it for my computer and have a douk ampapa 300w amp with upgraded muses 02 opamps and sony cs5s that i purchased a few black fridays ago at a great price. The ampapa amp has a mini 3.5 jack output and using the polk lfe rca input. The polk has an adjustable low band filter so will cross this sub over at about 80hz as to me thats the cleanest sounding xover point. Anyways, overall if you want a lower cost decent sound for your stereo or even computer or tv, this setup is great for a small to medium size room. Review for height monitor x190, got these on black friday as well. I have 6 wharfedale diamond bookshelfs and center with a sub for my main tv hooked up to my onkyo rz50. It has outs for atmos height so after reading reviews got this on black friday sales. Overall a very simple maybe 3 inch full range driver in an angled mdf box. It has a nice grayish color grill and speaker posts that accept wire or banana plugs so simple install. I need to se up my dirac live settings then will update review. Other then that. Speaker looks fine in quality but super simple design so get them on sale. ... show more
Reviewed in the United States on November 18, 2025 by Maleko
    • Great Speakers For The Price
Style: Tower Speaker (XT60)
These are my second set of Polk "Tower" speakers. The first set are multiple 6 1/2" drivers which I use for home theater front surrounds. Look: These are high quality. They sound fantastic. But (IMHO) they are basically large bookshelf speakers. In a small room, they have great definition and I think the pair of passive radiators improve bass immensely compared to a single ported enclosure woofer/driver. But look, a large room and loud volumes, need way more than a 6 1/2" speaker. It isn't a quality or spec issue - it's physics. Speakers move air and the amount of air they can move is directly related to speaker size. For the money, Polk speakers are a value. However, choose according to room size and intended listening levels. Small speakers (Under 8") work well in small rooms. Small speakers work for quiet volume levels. In terms of quality and fit for purpose, would buy again. - - - Having said all of this, would these speakers and a decent Center Channel Speaker be a Home Theater improvement over a sound bar. Absolutely. ... show more
Reviewed in the United States on December 27, 2025 by Andy
    • Resonable priced clarity
Style: Large Tower Speaker (XT70)
First impression Sounds smooth and full, paired with a Yamaha As 501 amp. Tons of low end and clarity. Feed them clean and they will perform. Plenty of volume to fill a 14x14 room. Sound smooth and pleasing to my ears without being shrill .
Reviewed in the United States on February 4, 2026 by samdrucker
    • Decent speakers. Not great speakers.
Style: Surround Speakers w/ 6.5" Woofer - Pair ...
Got these on a great sale price otherwise would give 3 stars. Have a pair of Polk monitor 4’s from 1989. Still love those speakers. Thought these would be similar. Yep, they’re not. Decent base, but lacks highs and mids are muddy. Not sure I’ve ever found this with other speakers - but these sound better louder. The build quality also is not great. They look decent from a distance but close inspection equals poor joins and seems. The grill covers are flimsy. Sort of the story with this entry price point these days. I also recently purchased a pair of klipsch with same size woofer but with their horn loaded tweeter. At list price they and the Polk are pretty close. If they’d been same price I’d paid I would be retuning the polls. The polks have ended up in my workshop and the klipsh in my office. Maybe that helps describe the difference. Loud and muddy in the shop. Bright and bassy in the office!! ... show more
Reviewed in the United States on December 31, 2025 by brad
    • Incredible Value, Very Impressed!
Style: 10" Subwoofer (XT10)
One word, value. I have an SVS-1000 and I get similar bass quality from this Polk XT10. I’ve been very impressed with this sub. Fits perfectly under the desk, works perfect with my NXZT pc speakers. Excellent power, ease of setup, sound quality, range, durability, and looks modern and professional. Love Polk. My main living setup has been Polk for years now. You go Polk! ... show more
Reviewed in the United States on November 11, 2025 by Ryan Smith
    • Polk Audio Home Theater System Review Blown Away!
Style: 12" Subwoofer (XT12)
Review Image by Brandon C. Brandon C.
Let me start by saying I never leave reviews. But after finishing my dedicated theater room and firing up my Polk Audio setup, I had to make an exception. Simply put: I'm blown away. My system includes: 2 Polk XT70 Towers 2 XT30 Centers (yes, two centers, and clarity is unreal) 2 OWM3s for rear surround 1 XT12 Subwoofer Powered by a Denon AVR-S570BT I spent around $1,200–$1,300 on this setup, and it performs like something three to four times that price. I tested it with everything from Star Wars, Top Gun: Maverick, Mission: Impossible, Transformers, and the full Marvel catalog. Every explosion, orchestral swell, and whispered line is crisp, dynamic, and immersive. The sub hits hard when needed, and the highs and mids are perfectly balanced. Dialogue clarity is exceptional, and music playback is just as impressive, with a wide soundstage, tight bass, and clean highs. As someone working in film and television, I use this system to review projects before sending them to streaming platforms. It gives me confidence that our audio is tight across all frequencies and plays beautifully on real-world systems. If you're looking for a budget-friendly, high-performance setup, get yourself a Polk system and pair it with a Denon AVR. Trust me, you won’t be disappointed. The smile on my face during the first listen said it all. ... show more
Reviewed in the United States on June 30, 2025 by Brandon C. Brandon C.

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