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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, Jul 16
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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


Audio Output Mode: Surround


Mounting Type: Floor Standing


Enclosure Material: Engineered Wood


Speaker Type: Subwoofer


Additional Features: Dolby Enabled


Antenna Location: For Surround Sound Systems


Subwoofer Diameter: 12 Inches


Color: Black


Is Waterproof: False


Warranty Type: Full


Control Method: Remote


Speaker Size: 12 Inches


Woofer Diameter: 12 Inches


Water Resistance Level: Not Water Resistant


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


MP3 player: No


Controller Type: Corded Electric


Unit Count: 1.0 Count


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


Item Weight: 39 Pounds


Compatible Devices: Home Theater


Power Source: Corded Electric


Brand: Polk Audio


Model Number: MXT12


Model Name: MXT12


Built-In Media: Speaker


Warranty Description: 5 Years


Number of Items: 1


UPC: 747192135058


Manufacturer: Polk


Item Type Name: Subwoofer


Speaker Maximum Output Power: 100 Watts


Frequency Response: 40 KHz


Number of Audio Channels: 5.1


Impedance: 4 Ohms


Connectivity Technology: RCA


Wireless Technology: No Wireless Communication Technology


Subwoofer Connectivity Technology: Wired


Connectivity Protocol: RCA, LFE


Audio Driver Type: Dynamic Driver


Audio Driver Size: 12 Inches


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jul 16

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

    • Deep, Clean Bass That Completely Transformed My Home Theater Deep, Clean Bass That Completely Transformed My Home Theater
Style: 12" Subwoofer (XT12)
Review Image by Jonny Easling
Review Image by Jonny Easling
Deep, Clean Bass That Completely Transformed My Home Theater I purchased the Polk Monitor XT12 powered subwoofer as part of a home theater upgrade, and it has been one of the most impactful additions to my entire setup. Setup was quick and straightforward. The controls are easy to access, and integrating the subwoofer with my receiver took only a few minutes. Once calibrated, the difference was immediately noticeable. The 12-inch woofer produces deep, powerful bass that adds a whole new level of immersion to movies, gaming, and music. Action scenes have a satisfying low-end impact without sounding muddy or overpowering. Explosions, sound effects, and movie soundtracks feel much more realistic and engaging. What impressed me most is how well the XT12 balances power and clarity. It can deliver room-filling bass when needed, but it also remains controlled and musical during everyday listening. Whether watching movies, streaming shows, or listening to music, the bass feels natural and well integrated with the rest of the speakers. The cabinet feels solid and well-built, and the overall design looks clean and modern without drawing unnecessary attention to itself. Pros: • Deep and powerful bass performance • Excellent value for the price • Easy setup and integration • Clean, controlled low-frequency response • Great for both movies and music • Solid construction and attractive design Cons: • Large cabinet may require some planning for placement • May be more output than necessary for smaller rooms After extended use, I continue to be impressed with this subwoofer. It has added depth, impact, and realism to my entertainment system without requiring a premium budget. If you're looking for a powerful home theater subwoofer that delivers excellent performance and value, the Polk Monitor XT12 is an easy 5-star recommendation. ... show more
Reviewed in the United States on June 3, 2026 Reviewed in the United States on June 3, 2026 by Jonny Easling
    • Polk Audio Home Theater System Review Blown Away! Polk Audio Home Theater System Review Blown Away!
Style: 12" Subwoofer (XT12)
Review Image by 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 Reviewed in the United States on June 30, 2025 by Brandon C.
    • Very good quality inexpensive sub
Style: 12" Subwoofer (XT12)
I was replacing an old, much more expensive Velodyne sub (may it RIP). Not wishing to spend a fortune on one this time around, I opted for this Polk sub. I had some concerns about the quality attainable in this price range, but I knew Polk as a quality brand, and I was pleased with the purchase. Yes, this sub can shake your house if that’s what you want. It can probably shake your neighbor’s house, too, if you turn it up some more. But I was after neither of those things. It was clean and accurate base which adds color to the sound without being overwhelming I was looking for. In fact, from where I stand, if you are playing an audio track, and one can tell right away that there is a sub, it’s probably too loud. Clean and accurate base is exactly what this sub delivered for me. Someone here mentioned that auto-on wasn’t working well. It does work very well for me. Just don’t limit LFE output too much on your AMP. I have it limited to 120 Hz on the receiver to make sure a good amount of output flows into the sub to reliably trigger auto-on. Then I limit the frequency with the sub’s own crossover some more to achieve a perfect balance. If I were to make a wish, it would be to have an LED indicator on the front of the sub to see that it did turn on, like my old sub had. Assuming nothing fails through it is certainly not a necessity and would require an add-on to materials and cost. ... show more
Reviewed in the United States on February 2, 2024 by Roman Shulman
    • My only problem is, that I will never be able to max it out 😭
Style: 12" Subwoofer (XT12)
Legit amazing! 10/10 Price was perfect, would 100% buy again! 🥰 But warning for people who live in apartments, if you’re not careful someone is definitely going to complain. Unless your goal is to get people upset, then ignore this warning because this will work for that 😂 Also if you roll up like a foam soundproofing wall panel, and put it in the rear port (but not like fully blocking off the port though), it will make it a bit punchier. Not that it needs that to be done in anyway, but if you’re having this in a small room then doing that helps in ways that I can’t explain with words. It easily connected to my PC via optical output, which goes to an optical splitter. Then the optical branches off to my soundbar optical input and my GoXLR optical input. Then from the GoXLR I use the 3.5mm line out, converting to over to RCA into the subwoofer. This allows me to get perfect, easy and independent remote volume control of the subwoofer via the GoXLR sliders, while still having a master control on the PC that will adjust both the soundbar and subwoofer at the same time, resulting in perfectly fine tuned sound quality with absolutely no distortion. ... show more
Reviewed in the United States on May 10, 2025 by Miah
    • Big Bass
Style: 12" Subwoofer (XT12)
Makes sound quality with my music system awesome.. great bass .. and you know it’s all about the Bass 😎
Reviewed in the United States on April 27, 2026 by Bill
    • Good sub, but watch the low pass frequency
Style: 12" Subwoofer (XT12)
Like others have said, it's big, loud, and heavy. My only issue is that it doesn't pair well with the XT20 bookshelf monitors. The sub's minimum lowpass frequency is 80hz, and the XT20s can go down to ~45hz. All together, the speakers end up crossing over a bit too much, and you can end up with too much bass at those "crossover" frequency, and not enough below it. Tweaking the volume on the sub only helps so much. I assume this could be fixed with an equalizer, but I'd prefer if the subs lowpass frequency could be pushed down to 50hz to better pair with the monitors in it's same product family. ... show more
Reviewed in the United States on December 26, 2024 by G
    • Fantastic Polk Powered 12" Sub With Multiple Connection Options
Style: 12" Subwoofer (XT12)
Clean smooth bass or thunderously loud bass depending on your preferences and your choice of sub output settings, combined with multiple receiver connection options (including working with most old school receivers) and has built-in rear adjustment control options with a LED indicator, all make this an unbeatable deal considering competitors much higher prices for a comparable sub. The solidly built cabinet and removable grill have an appearance that should blend well into any surroundings. Weighing in about 40 pounds this subwoofer is substantially heavy. Could not be more satisfied with this purchase. It definitely brings bookshelf speakers to life! ... show more
Reviewed in the United States on November 19, 2024 by Review Man
    • Booming bass!!!
Style: 12" Subwoofer (XT12)
Sub sounds great!!! Easy to setup and works great with my Onkyo Reciever! Goes great with my other Monitor speakers.
Reviewed in the United States on April 18, 2026 by Christopher C.

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