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Polk Audio Atrium8 SDI

All-weather indoor/outdoor speaker with selectable stereo input mode (Black)

60 Reviews

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Item # 107ATR8SDB

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C$299.99 each

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Our take on the Polk Audio Atrium8 SDI

Use Polk's Atrium8 SDI speaker when you need maximum flexibility along with premium outdoor sound. It can stand alone as a single stereo speaker, or you can put two together for a high-performance stereo pair. One speaker is convenient when you want to pump tunes to a smaller area, like a deck or patio, or when mounting options are limited. If you have room for two speakers, these speakers will give you fuller sound and better stereo separation in larger listening areas. A simple switch allows you to choose between single-speaker or traditional two-speaker stereo playback.

Use Polk's Atrium8 SDI speaker when you need maximum flexibility along with premium outdoor sound. It can stand alone as a single stereo speaker, or you can put two together for a high-performance stereo pair. One speaker is convenient when you want to pump tunes to a smaller area, like a deck or patio, or when mounting options are limited. If you have room for two speakers, these speakers will give you fuller sound and better stereo separation in larger listening areas. A simple switch allows you to choose between single-speaker or traditional two-speaker stereo playback.

This speaker boasts the build quality you'd expect from Polk. It gives you superb audio performance, thanks to dual 1" tweeters, one 6-1/2" woofer, and PowerPort® bass venting. And the rugged, weatherproof design meets or exceeds stringent military specifications for full exposure to the elements. That means you'll enjoy years of great tunes, whether you install them in your bathroom or in your backyard.

Polk's new Speed-Lock™ system makes mounting the Atrium8 SDIs quick and easy. Install the bracket and simply click the speaker into place. Then just aim the sound towards your listening area and tighten down the included thumbscrew.

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Product Highlights:

  • all-weather enclosure
  • one 6-1/2" woofer
  • two 1" aluminum dome tweeters
  • tweeter placement is designed for better stereo separation in single-speaker setups
  • PowerPort® technology for better bass response
  • frequency response 45-27,000 Hz
  • sensitivity 91 dB
  • 8-ohm impedance
  • handles up to 125 watts per channel
  • includes mounting hardware
  • 8-1/2"W x 12-7/8"H x 9-7/16"D
  • warranty: 5 years
  • Our 60-day money-back guarantee
Priced each

    What's in the Box:

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

    Featured Video:

    Great outdoor speakers with a very full sound. I have 5 of them set up as surround. Nothing better out there

    Robert, Melville, NY


    Polk Audio Atrium8 SDI Reviews

    Average Customer Review(s):

    (60 Reviews)

    Big speaker, big sound.

    Blair from Midlothian, VA on 12/3/2017

    Crutchfield Customer Review (What's this?)

    These speakers are a bit bigger in size than most outdoor speakers but are also a bit bigger in sound. I have them mounted close to the corners under the ceiling of a 18x30 ft. outdoor porch, 30 ft. apart. Plenty of sound and booming base. These replaced another set of Polk speakers that lasted 30 years and were still kicking. Couldn't be happier with my Crutchfield purchase.

    Pros: Efficient. Nice looking. Plenty of bass. Sound fills a large are. Easy to install.

    Cons: None

    Polk Audio Atrium8 SDI

    Robert from Melville, NY on 7/5/2017

    Crutchfield Customer Review (What's this?)

    Great outdoor speakers with a very full sound. I have 5 of them set up as surround. Nothing better out there



    Polk Audio Atrium8 SDI

    joseph from berlin nj on 5/31/2017

    Crutchfield Customer Review (What's this?)

    I already have one pair for outdoors. brought an additional pair for my new screened in porch. These speakers are AWESOME!!!! I am very happy with these speakers. When you buy these speakers YOU WILL NOT BE DISAPOINTED!!!!!!!. Go ahead I dare you to jam these speakers. Your neighbors will hate you.

    Pros: easy to install. great sound.

    Cons: I can't think of any.

    Outstanding outdoor speakers

    MEL from Edmond, OK on 4/21/2017

    Crutchfield Customer Review (What's this?)

    Awesome speakers. This is my second set and I coupled them with the Atrium Sub. Family and neighbors with other brands of outdoor speakers are envious of my setup.



    Awesome speaker

    Chris from Clemmons, NC on 4/17/2017

    Crutchfield Customer Review (What's this?)

    Bought these because I had them in house I just sold, awesome speakers, plenty of bass, didn't need a sub

    Pros: Good bass . Luv em

    Cons: None, there's a reason I bought them for my new house

    Polk Audio Atrium8 SDI

    VSponce from Ponce, PR on 9/19/2016

    Crutchfield Customer Review (What's this?)

    I love the quality of these speakers. They reproduce great sound and were perfect my outdoor porch area.

    Pros: Easy to install even for one person.

    Cons: They were a little bit larger then I originally expected.

    Great outoodoor speaker PAIR

    Matt from Hillsborough, NC on 7/24/2016

    Crutchfield Customer Review (What's this?)

    I ordered a single speaker for the back porch and it sounded okay in SDI mode but really just okay. This is probably true of any speaker, but a pair just sounds a lot better. Grabbed a second speaker while still on sale and they are great. The second speaker made all of the difference. Sounds good on the porch at low volume or I can crank it up for clear sound well out into the yard. I am satisfied with the bass response for the music that I listen to (mostly rock) and I do not intend to add a sub. I am driving a single stereo pair of these speakers on a Sonos Connect:Amp and it will push them un-godly loud. I could certainly add another pair elsewhere if desired on that amp.

    Pros: Loud, clear and powerful enough to fill a large open space with sound. Well worth the $$ for this reason in particular. A smaller pair would be fine on the porch but would not push sound as far out in the yard.

    Cons: Not very impressive in SDI mode. Could possibly get me in trouble with the neighbors.

    Polk Atrium 8 Indoor/Outdoor Speakers

    Palmer S from Charlotte, NC on 7/11/2016

    Crutchfield Customer Review (What's this?)

    These speakers are much bigger and heavier than I anticipated, but man do they sound great. I installed these on my patio and really enjoy sitting out there and listening to these great speakers. A definite buy.

    Pros: Excellent build quality and sound great.

    Cons: None

    Sounds great right out of the box!

    JT from Maysville , KY on 7/10/2016

    I bought these on sale, which is rare, and they rock! These are used for an outdoor pool deck. I paired these with a Crown XLS1000 Power amp @ 215W per channel and a Polk Omni P1 wireless adapter. It's a completely invisible and wireless stand alone system that kicks butt! The sound quality is superb. If your up in the air on buying these don't wait. Get them now while they are on sale! Put some good clean power to them and you will be pleased. I can't wait till mine break in, they will only get better!

    Pros: Sound quality, ease of mounting, mounting bracket super sturdy, solid construction

    Cons: None for me, some say they are bulky but I wouldn't concern yourself with that. They are very well built!

    Polk Atrium 8 - Sound Great

    Eric W from Livermore, CA on 10/28/2015

    Crutchfield Customer Review (What's this?)

    I previously bought another brand of outdoor speakers and I just was never 100% satisfied. I should have bought these Atrium8 speakers in the first place, but I went against my better judgment. Even though these are designed to be outdoor, I take them down every time I get done using them. You just can't beat the construction of the Polks. They are solid and when you slide them in place, you almost don't even need to screw down the end caps (and I have these horizontally mounted. The sound also is awesome. I use them for my backyard home theatre and I love them. The only thing that I wish was better is if they made a dedicated outdoor center channel with two drivers instead of one. Other then that, I am completely satisfied.

    Pros: Great Construction and Mounting. Great sound.

    Cons: Nothing really, I love them.

    Polk Audio Atrium8 SDI

    Frank S from Colorado on 10/7/2015

    Crutchfield Customer Review (What's this?)

    Very good low frequency response. Easy to mount and aim.



    Polk outdoor speaker

    Jerry, Vermont from Vermont on 9/1/2015

    Crutchfield Customer Review (What's this?)

    The speaker was hefty, well built, easy to install and we are very pleased with the sound. It cranks up to all the decibels I would want for our deck area, but has enough reserve to disturb wildlife.

    Pros: Good quality, good value, even though cheaper options exist.

    Cons: A bit heavy, easier to have someone helping install overhead.

    Great product

    John from South Milwaukee, WI on 8/16/2015

    Crutchfield Customer Review (What's this?)

    Sounds great, easy to install and construction feels solid.

    Pros: Sound quality is very good and they were very easy to mount. The binding posts seem to be very sturdy, excellent quality. Using two on our deck connected to zone 2 of a Yamaha RX-V679.

    Cons: They are surprisingly large but I suppose had I paid more attention to the products description I would have realized this.

    Polk Atrium 8

    JeffS from Loves Park, Illinois on 7/6/2015

    Crutchfield Customer Review (What's this?)

    Used two of these speakers in an outdoor bar setting for a buisness. The speakers are very easy to install. I thought about using four but actually two work very well. Great coverage! The sound is very clear and the bass when adjusted correctly gives great sound also. I used a Crown amp to power them. If need be I can get the model of the amp. But overall getting nice compliments from the patrons compared to the older MTX speakers that were taken out.

    Pros: Very well designed! Great sound! Easy to install and sturdy! Not a gripe but they can handle some power so get a good amp to run them.

    Cons: None

    Solid speaker

    DavidB from Michigan on 7/5/2015

    Crutchfield Customer Review (What's this?)

    This is the third such speaker that I have purchased so you can tell I do like them. They are a solid speaker with a modern look. I have installed two in my pool area and one in my backyard. Nice clear sound and nice wire connections that assure of a continued connection in all weather.

    Pros: Nice sound and good looks

    Cons: bigger than anticipated

    Polk Audio Atrium8

    Lee from Greensburg Indiana on 6/15/2015

    Crutchfield Customer Review (What's this?)




    Polk Atrium 8

    n from atlanta on 5/17/2014

    Crutchfield Customer Review (What's this?)

    Love the Atrium 8 speakers. We bought these to use for our daughters wedding. We had the wedding on our lake lot and we were worried that the sound would be lost due to the size of the outdoor area. The speakers were awesome. Such great surround that you couldn't tell where to music was coming from. I would highly recommend.

    Pros: Great sound for large out door area's.

    Cons: Non

    Polk Audio Atrium8 SDI

    Peter from Westerly, RI on 8/1/2013

    Crutchfield Customer Review (What's this?)

    Sound great.



    Great product

    Corey R from Lebanon, Tn. on 6/30/2013

    Crutchfield Customer Review (What's this?)

    Great product. Very good sound for a single speaker setup. Sound is very balanced and clear. Provides great entertainment on our patio area with plenty of volume range. Would definitely buy again.

    Pros: Sound quality

    Cons: None

    Polk Audio Atrium8 SDI

    Doug D. from Madisonville, LA on 6/24/2012

    Crutchfield Customer Review (What's this?)

    Had these speakers up for about a few weeks now and they are fantastic! Great sound on highs, lows and mid range. In my opinion, a great speaker!

    Pros: Great sound. Can hear highs, lows and mids with excellent quality.

    Cons: Non as of yet!


    Hands-on research

    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.

    6.5" DVC Woofer: The Polk Audio Atrium8SDI uses a dual-voice coil long-throw aerated polypropylene 6.5" woofer for clean midrange and deep, accurate bass. The dual voice coil design adds greater efficiency and power handling. For a smoother response and improved durability, the woofer uses a butyl rubber surround.

    Dual Tweeters: The Polk Audio Atrium8SDI has two 1" anodized aluminum dome tweeters with rubber surrounds and neodymium magnets for better power handling, smoother response and greater accuracy. This Dual Tweeter Array features Stereo Tweeter Aiming for excellent imaging, allowing you to use the Atrium8SDI as a single stereo speaker, or as half of a stereo pair.

    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.


    Dual Input/Single Input Feature: A rear mounted switch allows the Atrium8SDI to operate as a single, dual-input speaker for stereo applications, or a traditional single-input speaker for left or right use. When using the Atrium8SDI as a single stereo speaker, the dual tweeters and dual voice coils handle the left and right signals independently.

    5-Way Binding Posts: The Atrium8SDI has two sets of gold-plated 5-way binding posts that will accept bare wire, pin connectors, spade connectors, and banana plugs (single or dual).

    Mounting Options

    Speed-Locking Mounting System: The included rustproof aluminum bracket allows multiple mounting options and is quick-and-easy to install. The Atrium8SDI can be mounted either horizontally or vertically and aimed to deliver the best possible sound in a variety of situations The integrated bracket provides full 180-degree rotation (when mounted vertically or horizontally. The mounting bracket even allows 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.


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