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Polk Audio Atrium4

All-weather indoor/outdoor speakers (Black)

125 Reviews | 15 questions - 46 answers

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Item # 107ATR4B

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Our take on the Polk Audio Atrium4

Turn your backyard into an outdoor concert hall with Polk's Atrium4 speakers. These small speakers offer great sound, thanks to 3/4" tweeters and 4-1/2" woofers. And the rugged, weatherproof design meets or exceeds stringent military specifications for full exposure to the elements. That means you'll get years of superb performance, wherever you place them.

Turn your backyard into an outdoor concert hall with Polk's Atrium4 speakers. These small speakers offer great sound, thanks to 3/4" tweeters and 4-1/2" woofers. And the rugged, weatherproof design meets or exceeds stringent military specifications for full exposure to the elements. That means you'll get years of superb performance, wherever you place them.

Polk's new Speed-Lock™ system makes mounting the Atrium4s quick and easy. Install the bracket and simply click the speaker into place. Just aim the sound towards your listening area and then tighten down the included thumbscrew.

Got wire?
Most speakers don't include any. Learn more about in-wall wiring at the Crutchfield Learning Center.
Shop our selection of in-wall speaker wire.

Product Highlights:

  • all-weather enclosure
  • 4-1/2" woofer, 3/4" aluminum dome tweeter
  • frequency response 75-25,000 Hz
  • sensitivity 89 dB
  • 8-ohm impedance
  • handles up to 80 watts
  • includes mounting hardware
  • 5-13/16"W x 8-5/8"H x 6-13/16"D
  • warranty: 5 years
  • Our 60-day money-back guarantee
Priced per pair

    What's in the Box:

    • 2 Black all-weather speakers
    • 2 Mounting brackets (installed) Owner's Manual
    • Online Product Registration card
    • Polk Audio brochure

    Featured Video

    Very affordable, great sound quality, very easy to install, just love them!

    John, Bowie, MD


    Polk Audio Atrium4 Reviews

    Average Customer Review(s):

    (125 Reviews)
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    Hands-on research

    Features and Specs

    Enclosure Acoustic Suspension
    Tweeter Type Dome
    Midrange Size ---
    Woofer Size 4-1/2
    Woofer Composition Polypropylene
    Woofer Surround Butyl rubber
    Power Range (watts) 10-80
    Sensitivity 89 dB
    Impedance (ohms) 8
    Frequency Response 75-20k Hz
    Connector Type 5-way post
    Height (inches) 8-5/8
    Width (inches) 5-13/16
    Depth (inches) 6-13/16
    Weight (pounds) 3.6
    Mounting Bracket Included Yes
    Parts Warranty 5 Years
    Labor Warranty 5 Years

    Product Research

    Outdoor Speaker
    Driver Technology
    Enclosure Design
    Mounting Options

    Outdoor Speaker

    Weatherproof Design: Polk Audio All-Weather Certified, Atrium Series speakers exceed baseline industrial and military specifications for environmental endurance (ASTM D5894-UV Salt Fog, Mil Standard 810 Immersion, Mil-Std 883 Method 1009.8 for salt and corrosion.) Certification means Atrium speakers can effortlessly withstand the outdoors, and hold up in extreme temperatures and precipitation.

    Driver Technology

    Polk Patented Technologies: Patented Dynamic Balance and Klippel Optimization technologies ensure the perfect material performance, eliminating driver and tweeter "artifacts" for more realistic sound reproduction at high and low volume levels.

    • Dynamic Balance: A Polk perfected method of analyzing a speaker's microscopic behavior with laser Interferometry. Polk engineers can tune out unwanted resonance and distortion with the right combination of materials, geometry and construction techniques. This brings you pure, distortion-free sound.
    • Klippel Optimization: By using a state-of-the-art Klippel Distortion Analyzer, Polk engineers were able to optimize the woofer's motor structure, voice coil alignment and suspension bringing you the best possible performance even at extreme listening levels.

    Woofers: Each speaker features a 4 1/2" (11.43cm) long-throw mineral-filled polypropylene cone driver for clean midrange and deep, accurate bass. For a smoother response and improved durability, each woofer uses a butyl rubber surround.

    Tweeters: Each speaker features a 3/4" (19mm) anodized aluminum dome tweeter with rubber surround and neodymium magnet for better power handling and smoother response.

    Enclosure Design

    Rugged Enclosure Design: The durable, mineral-filled polypropylene cabinet design, with molded-in bracing, sounds like a real speaker (not "an outdoor speaker"), and survives years of seasonal changes, for great sound, no matter what the weather. The rugged, mineral-filled polypropylene enclosure features a rustproof aluminum grille, rustproof aluminum bracket, and stainless steel/brass hardware.

    Note: The speakers are available in a black or white finish. The enclosure is also paintable.

    Broad Coverage Baffle Design: The sculpted front, steeply-angled baffle design and rounded enclosure minimize diffraction (sound reflecting off of hard edges) for more open and lifelike imaging.


    5-way Binding Posts: The Atrium 4 has a pair of gold-plated 5-way binding posts that will accept bare wire, pin connectors, spade connectors, single- and dual-banana plugs.

    Mounting Options

    Speed-Locking Mounting System: The included rustproof aluminum brackets allow multiple mounting options and are quick-and-easy to install. The Atrium 4 can be mounted either horizontally or vertically and aimed to deliver the best possible sound in a variety of situations The integrated brackets provide full 180-degree rotation (when mounted vertically or horizontally. The mounting brackets even allow the speaker to be mounted snugly in a corner or under an eve (at a downward 45-degree angle). You can remove the bracket and use the speaker's built-in stability feet, if you simply want to place the speaker on a table or shelf.

    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 verify what’s in the box, 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.

    Staff Reviews

    Product reviews from the Crutchfield Labs

    What are the Labs?
    Q & A

    Customer Q&A

    Crutchfield asked  
    Why did you buy this?

    Great reviews and price. [ David  Sep 13, 2018 ]
    crutchfield recommended [ Thomas  Aug 06, 2018 ]
    I use Polk Audio for my home system and the online reviews for this speaker met my needs. [ Kenneth  Aug 01, 2018 ]
    I've purchased them for my home before and they sound so good so I ordered another pair [ William  Jul 16, 2018 ]
    Update sound outside [ Jeffrey  Jul 09, 2018 ]
    I've had this product before great sound and very reliable had many years of enjoyment [ Donald  Jul 04, 2018 ]
    Polk Quality. Easy to mount. Good value. [ daniel  Jun 27, 2018 ]
    ratings [ RICHARD  Jun 04, 2018 ]
    Good value for an outdoor speaker set. Size of speakers fit my available space nicely. [ Robert  May 16, 2018 ]
    These were chosen to replace my current outdoor garage under eve speakers (15+yr old baby KLHs) that are on their last leg. They will be used for music and as left and right channels for outdoor movie night when the weather permits. I would have went bigger but my eve overhang is only 7" deep. Thank you. [ Keith  May 12, 2018 ]
    Purchased before [ PAUL  May 04, 2018 ]
    right size. Polk reputation. [ Stanley  Apr 29, 2018 ]
    Great reviews and perfect for patio/backyard. We can jam out with our chickens, goats and peacocks...oh, AND our friends! =) [ PAUL  Apr 27, 2018 ]
    Needed to replace rear surround sound speakers. [ Robert  Apr 24, 2018 ]
    Pricing, reviews, reputation of Polk. [ Robert  Apr 15, 2018 ]
    my first go around with outdoor speakers if i like theses i can always upgrade all the reviews i read are saying they will have good longevity and good quality sound for open areas [ Ben  Feb 28, 2018 ]
    Value [ Richard  Feb 13, 2018 ]
    Best [ Juan  Aug 21, 2017 ]
    Make and price. [ Richard  Aug 04, 2017 ]
    Good quality at a reasonable price. [ Mark  Jul 10, 2017 ]
    I chose them for their compact size. A little concerned about their bass response, but we'll see how they do when I get them in place. [ Pete  Jun 05, 2017 ]
    Ryan gave me great advice. Thanks Ryan! [ Cody  May 20, 2017 ]
    A friend of mine purchased these speakers and they sound really good and for the price you can't beat it! [ William  Apr 16, 2017 ]
    price, style, and quality, these are very nice deck speakers! [ Chris  Apr 09, 2017 ]
    Polk is great product. I don't need large speakers outside so these should work great [ Shane  Apr 06, 2017 ]
    Customer service helped me select it. [ Norm  Apr 02, 2017 ]
    Came free with a Polk speaker order from Crutchfield and they sound great. [ GERALD S  Mar 26, 2017 ]
    price and value [ marc  Feb 14, 2017 ]
    Using these for my outdoor pool area, have five around my pool-hot tub. Amazing sound and price was right. [ Phil  Feb 01, 2017 ]
    Have 4 sets of Polk Atriums now and am satisfied with price/performance [ Robert  Jan 27, 2017 ]
    I've always trusted Polk Audio, and Crutchfield never did me wrong. The online ordering is as easy as it gets. [ Ralph  Jan 17, 2017 ]
    Advisor recommended [ Michael  Jan 12, 2017 ]
    Color & price. [ John  Dec 05, 2016 ]
    Recommendation from Crutchfield technical adviser. [ WILLIAM R  Nov 27, 2016 ]
    We'll try them on back deck. If they are too small, I'll move'em downstairs and get the 5's. [ Dana  Oct 30, 2016 ]
    I've been using these speakers around my pool and they have been working great for the past two seasons. These are great speakers for the price [ D  Oct 19, 2016 ]
    Rusty recommended [ John  Sep 26, 2016 ]
    Great Product [ Fast Custom Car  Jun 28, 2016 ]
    my boss got some polks, likes them, i recemmoneded his system to him so I trust him [ Barak  Jun 01, 2016 ]
    Right fit to replace my existing outdoor speakers. Got great advice from Ryan at Crutchfield who said these compared favorably to some speakers at twice the price. Ryan's Bio: [ Patrick  May 26, 2016 ]
    Heard to many good things about , and your video help me make the decision [ Mohamad  May 23, 2016 ]
    They were recommended by my installer, an AV professional who I trust a great deal. [ RONALD E  May 19, 2016 ]
    Polk quality [ DANIEL W  Mar 25, 2016 ]
    We have other Polk speakers and they meet our needs size-wise, features, and in particular being good for outdoors. We basically are a 'sleep inside' but play outside family. [ DAN  Jan 15, 2016 ]
    People caked these up for outdoor patio. Sound great outside and make hanging out out more enjoyable with great sounding tunes [ Brian  Dec 29, 2015 ]
    Highly rated, smaller, paint-able, affordable. [ cee_choice  Oct 17, 2018 ]
    These speakers are a great "bang for the buck" , our company uses these for our private charter vehicles. So far I have have 12 sets working/sounding great! [ Brian  Aug 15, 2018 ]
    cheep [ NICK  Aug 12, 2018 ]
    Price and reviews [ Mark  Aug 01, 2018 ]
    Second pair in a marine enironment on a boat. Love the speakers and have not used your service in 35 years. I am glad you are still around...crutchfield has always been a leader in audio equipment and reviews! [ shaun  Jul 31, 2018 ]
    Read reviews online. [ Wallace  Jul 10, 2018 ]
    Quality, size and price [ JAMES  Jul 07, 2018 ]
    have other Polk products [ Collin  Jun 27, 2018 ]
    Price and ratings [ Johann  Jun 17, 2018 ]
    great luck with this brand in the past, and usually over delivers for the price [ Timothy  Jun 17, 2018 ]
    Need to replace some cheap outdoor speakers on the back of our garage! Wanted something made to last and sound great! [ D  Jun 17, 2018 ]
    Seemed to be good value. Concerned about bass levels mentioned in reviews but want background music.....not outdoor concert levels. I hope these will meet expectations. [ Chris  Jun 11, 2018 ]
    high rating , price and free shipping [ Dan  Jun 05, 2018 ]
    ratings [ RICHARD  Jun 04, 2018 ]
    Value. [ walter  May 15, 2018 ]
    It had great reviews and for the price couldn't go wrong for a great Mother's Day gift. [ Cole  Apr 09, 2018 ]
    Heard them in a Stars Drive in and loved the sound [ Felipa  Apr 08, 2018 ]
    Previous Polk Customer [ Natalie  Mar 27, 2018 ]
    After several days reviewing information and comparing with others speakers brands, I found out that Polk Audio Atrium 4 Speakers was the best choice for listening music with my new Onkyo TX-SR373 Receiver in my yard. Peter L. [ Pedro Lopez  Mar 11, 2018 ]
    Great value for a product I needed but did't want to break the bank on. Will update once I have the product and listen to them. [ mgurr  Feb 12, 2018 ]
    Good lower end outdoor patio speakers [ Ray  Jan 30, 2018 ]
    Recommendation from Crutchfield rep and another store salesman [ David  Nov 29, 2017 ]
    This is a great all weather product, have had no issues with it. Easy mount good performance. [ John  Sep 18, 2017 ]
    Price and performance [ harold  Aug 09, 2017 ]
    Needed to replace one I broke. [ Mark  Jul 18, 2017 ]
    The reviews [ Dana  Jun 28, 2017 ]
    Purchased these twice, they rock! [ CHRIS  Jun 20, 2017 ]
    my outdoor ceiling is white [ S  Jun 19, 2017 ]
    I purchased the Polk Atrium 6 and like them very much, needed something a little smaller for a different location. [ Edwin  Jun 13, 2017 ]
    to use outdoors around my pool. [ C Jyl  Apr 25, 2017 ]
    Prior experience with Atrium4s. Older pair has been out on the deck for almost 8 years now. Very limited protection from the elements and they held up well - still sound great. Wanted a new pair for a different location. [ Rich  Apr 05, 2017 ]
    Speaker smoked after warranty was up [ Jeffrey  Mar 22, 2017 ]
    I already had 1 pair from 10 years ago, they are still going great...just decided 2 pairs would be better! [ Jody  Mar 21, 2017 ]
    price, look [ Glen  Mar 07, 2017 ]
    Perfect size and price for my back porch [ Bill  Jan 22, 2017 ]
    Reviews were good. Used in side yard and they have worked out very well. [ William  Dec 07, 2016 ]
    Recommeded by Crutchfield and other audio sources [ Tymon  Dec 02, 2016 ]
    High quality, but small enough to be hung on the wall. Excellent sound and low price both! [ D  Nov 29, 2016 ]
    this item fits my budget ! [ JERRY  Nov 26, 2016 ]
    Recommended by Crutchfield [ Michael  Oct 25, 2016 ]
    I chose these speakers for their good reviews and slightly smaller size than other similar speakers. [ John  Aug 03, 2016 ]
    I can count on friendly help if I need it. [ RONALD  Jun 27, 2016 ]
    Polk brand and weather resistance [ Russell  May 26, 2016 ]
    Good quality, great sound at a very reasonable price [ Luc  May 12, 2016 ]
    Polk brand, Product reviews. [ ANTHONY J  Apr 17, 2016 ]
    Replacing a prior generation PA pair which I was very satisfied with. [ Chuck  Mar 31, 2016 ]
    Good experience with the brand. [ Sunil Z.  Mar 19, 2016 ]
    Good reviews and price. [ michael  Feb 27, 2016 ]
    Price [ John Derek  Jan 30, 2016 ]
    Needed outdoor speakers and wanted to buy Polk's [ Benjamin  Jan 14, 2016 ]

    15 questions already asked

    No these are hard wired [ Michael  Jul 19, 2018 ]
    No [ Trent  Jul 19, 2018 ]
    No [ Robert  Jul 19, 2018 ]
    No they are not. [ Alfred  Jul 19, 2018 ]
    No there is not. I have mine both installed on the ground and on the house and nothing is visible. [ David  May 01, 2018 ]
    No but I wish they did but I put dielectric grease on the wires and it works [ Richard  May 01, 2018 ]
    No [ Steve  May 01, 2018 ]
    I have this speaker mounted on my boat in PR for 1 year ago with no issues. Sound super. You have to buy goods cables [ Juan Javier  May 28, 2018 ]
    I have these speakers mounted on a tiki bar outside in a waterfront home. (saltwater). Have had them for nearly 2 years and no problem at all. [ Steve  May 01, 2018 ]
    I don't have them mounted in the salty ocean area as you, but I do have two sets installed in Wisconsin. Lots of snow and freezing weather. They have held up great. Am actually ordering three more sets for another customer. I'm an electrical contractor, always a great product. (Polk Audio) [ John  Apr 16, 2018 ]
    There are the normal speaker wire terminals. [ Michael  Apr 05, 2018 ]
    Sure. I bought a Bluetooth adapter from peach tree audio and connected it to an old stereo reciever I bought on Craigslist and connect my IPhone to listen to Pandora all the time. Great outdoor speakers. [ Mark  Apr 05, 2018 ]
    They are not designed for direct connection to a pc. The pc would likely not have enough power in the sound board to drive these. [ John  Apr 05, 2018 ]
    Personally, I don't see why not. I live in Michigan and since I mounted them outside on my deck 2 years ago I haven't taken them down. They still work like new. However, I would take them down if you don't live there year round because if other people hear them, they may walk away when you aren't there if you know what I mean because they do sound good. So good that I bought a second set for a place we have up north. [ Shane  May 31, 2017 ]
    Yes [ PASCAL  May 30, 2017 ]
    Yes [ PASCAL  May 30, 2017 ]
    Yes, I think you will like it [ PHIL  May 30, 2017 ]
    Should be fine. As with anything in salt air the life might be reduced vs a normal porch. [ Chad  May 30, 2017 ]
    No [ PASCAL  May 30, 2017 ]
    Yes they can be hooked up to a outside tv and no they are not Bluetooth. [ Johnny  Jan 13, 2017 ]
    Not directly. They need to be driven by an amplifier. They do not have built in Bluetooth either. That said, they are very good outdoor speakers, but may not be what you are looking for. [ Bill  Jan 13, 2017 ]
    No [ PASCAL  May 30, 2017 ]
    There is paint on the market for to use just on plastic materials. But, I suggest you don't paint them. [ Scott  Jul 24, 2015 ]
    Yes. Remove grill and cover cone and tweeter. I painted to match an outdoor space at a country club. [ PAUL J  Jul 24, 2015 ]
    I don't see why not, but I would go with the white ones and paint those. It might be hard to cover up the black completely. [ Edward  Jul 24, 2015 ]
    I would say yes, use a spray paint so the grill doesn't get clogged. [ THOMAS  Jul 23, 2015 ]
    Yes [ PASCAL  May 30, 2017 ]
    Have them installed on an outside wall about a foot under the eve. No problems. [ JESSE  Apr 08, 2015 ]
    They are able to withstand the elements but I have mine up under my overhang so they don't stick out so much. They sound great. James [ JAMES A  Apr 07, 2015 ]
    We have 2 sets of these speakers which have done really well outside. However, ours are mounted on outside porches with overhead cover so I'm not sure about total exposure. I do know that ours have gotten wet and icy in spite of the cover because we are on a mountaintop with extreme wind. [ mary  Apr 07, 2015 ]
    I've had them up under the eaves of my back porch by the pool for a few years and the're doing just fine. While they aren't in direct weather, the eaves are fairly short, so I'm sure they're getting partially wet. They sound great and at a reasonable price, so those were the two biggest factors for me. Hope that helps! [ MARK  Apr 07, 2015 ]
    Mine are under the eaves of the roof line. I'm sure they get some wind driven rain from time to time. They work fine. [ KELL C  Apr 07, 2015 ]
    We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question. [ Krissy  Jun 06, 2014 ]  Staff
    Back porch [ PASCAL  May 30, 2017 ]
    5 years parts and labor [ TRAVIS  Mar 14, 2014 ]
    Sorry, don't know. I have them as my front presence speaker for a 9.1 system. I got them free with Polk purchase, very nice speakers, seem very durable and very well made. [ Laurence  Mar 14, 2014 ]
    No, they do not need an amplifier. However they do perform much better with an amplifier! My present installation uses an amplifier with a built in surround sound and a sub-woofer (I strongly recommend you use a sub-woofer). I have left my speakers up, during last years hurricane, and have experienced no reduction in performance! (I live in Florida). [ NATHAN O  Jun 11, 2018 ]
    Only if you hang the brackets horizontally. [ RUBEN A  Apr 29, 2017 ]
    They would work fine , a little bulky for inside a house and unless you have a flood, the weather resistance is wasted inside :). Have you looked into the owm3 by Polk? They have an awesome look to them and can be mounted all sorts of ways [ Aaron Doran  Apr 06, 2016 ]
    We don't have any info about replacing the woofers in the Atrium4 speakers, but if yours are still under the manufacturer's warranty (5-years), it's possible Polk will replace them for you. You can contact Polk directly for more information at 800-377-7655. I hope that helps! My Bio: [ Larry  Feb 10, 2016 ]  Staff
    I have a patio that is about 20x40 and these work perfectly in that space. [ MICHAEL  Jan 31, 2014 ]
    we have them mounted about 7 feet up on our terrace, the area is 10x25 feet, and they provide excellent coverage for the requirement, which is largely background music for parties [ ADAM C  Jan 29, 2014 ]
    It has rained so much since i got the speakers i was unable to put them up. Sorry i couldn't be more help. [ GREGORY  Jan 29, 2014 ]
    I use them on my patio outside but I am not happy with the sound when you turn up the volume. They rumble and sound like a blown speaker. [ RICHARD  Jan 29, 2014 ]
    I use these around my pool/patio area and it is approximately 50' x 100'. The speakers are clear and plenty loud enough for my type of listening (background music). My speakers are about 125 feet from my receiver, so there is probably some more power there, but ohm draw is high at that distance. The only thing I wish I had more of, is some bass, but I really can't expect too much boom boom from ceiling mounted speakers. Overall, I am happy with these. They look good, sound good, and mount easily. [ JOHN  Jan 28, 2014 ]