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Polk Audio Atrium8 SDI

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

Item #: 107ATR8SDW

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24 Reviews | 3 questions - 6 answers

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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

    Outdoor speakers let you move the party outside

    Outdoor speakers are built tough -- they laugh at wind, rain and weather. Tuck a pair under your eaves and they'll pump out the tunes to keep everybody smiling and swaying at your next cookout or pool party. We also have some "rock" speakers that blend seamlessly into your landscaped lawn or garden.

    Polk Audio Atrium8 SDI Reviews

    Average Customer Review:

    24 Reviews

    Polk Atrium 8 - Sound Great

    Written by: Eric W from Livermore, CA on October 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

    Written by: Frank S from Colorado on October 7, 2015

    Crutchfield Customer Review (What's this?)

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



    Polk outdoor speaker

    Written by: Jerry, Vermont from Vermont on September 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

    Written by: John from South Milwaukee, WI on August 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.

    Like so Much I Bought a New Pair

    Written by: Mark W. from New Jersey on July 6, 2015

    Crutchfield Customer Review (What's this?)

    I owned a pair of the much older Polk 65 sdi and after at least 15 seasons of Boston, Connecticut and New Jersey weather (yes they survived Hurricane Sandy) I wanted to upgrade and since I needed the 4 input in the back for speakers I had no choice but to upgrade with the new 8 series. I have this paired with a 12 channel Niles amplifier that drives my Sonos system in 7 different locations. The speakers are fantastic and have really nice lows accompanied with great midrange and highs. They make all my other outdoor speakers sound muffled so I expect to replace more speakers this summer with additional 8 SDI's. You will be really happy that you got these but make sure you a nice clean amp so you will get the crisp tight bass that you rarely get with any outdoor type speaker.

    Pros: Bass, clean crisp sound

    Cons: I have neighbors......

    Polk Atrium 8

    Written by: JeffS from Loves Park, Illinois on July 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

    Written by: DavidB from Michigan on July 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

    Great Sound

    Written by: DougG from Springfield, MO on June 22, 2015

    Crutchfield Customer Review (What's this?)

    Great Sound. Quality Build.



    Polk Audio Atrium8

    Written by: Lee from Greensburg Indiana on June 15, 2015

    Crutchfield Customer Review (What's this?)




    Atrium8 - Impressive Speakers

    Written by: TJD from Albany, New York on June 9, 2015

    Crutchfield Customer Review (What's this?)

    The Atrium8 SDI speakers are the first Polk product I have ever purchased and are quite impressive. They are paired with a new Harman Kardon HK3770 receiver. Speakers are mounted approximately 10' high and 20' apart and they really fill a very large yard with great sound. Installation is easy and product construction is very solid. We have pumped a wide range of music through them, from Norah Jones to Rage Against the Machine and the sound is truly impressive.

    Pros: Well constructed product, easy mounting, rich sound and bass better than expected.

    Cons: None thus far. Been installed for about a month now.


    Written by: Mark from waterloo sc on May 21, 2015

    Crutchfield Customer Review (What's this?)

    I had the atrium 5s...which were outstanding. So, like the typical guy I thought bigger must be better. I purchased the atrium 8s sdi's. Powered by my adcom 555 amp the sound was unbelieveable. Deeper bass..better mids and highs crisp and clear. Separation when using two at each end of my balcony was startling. Sounded as if I was standing in front of the band. Careful with your outdoor volume control. I have burned through three niles controllers but that's more of my power issues..too much. Stay to the spec. Crutchfield is the best for customer service hands down...anywhere. With the recent price drop you will not be disappointed.

    Pros: Better everything as far as sound if you use the right space...amp...and set up

    Cons: Let them for awhile They get better the more you play them. There is a break in period. I suggest dynamic jazz, symphonic or cuban music at about half volume for about 80 hours.

    Polk Atrium 8 SDI

    Written by: Papa from Emerald Isle, North Carolina on March 27, 2015

    Crutchfield Customer Review (What's this?)

    Easy to install and sound great installed under a wooden 12' high deck. Located near Atlantic Ocean, exposed to salt atmosphere. Will see how they hold up over time

    Pros: construction appears substantial, easy installation


    Awesome outdoor sound!

    Written by: Colt45 from Midland,tx on March 17, 2015

    Crutchfield Customer Review (What's this?)

    I bought these to replace some worn out Boston acoustic patio speakers and they didn't disappoint! Well worth the money!

    Pros: Clear, nice low frequencies, the ability to run one speaker in stereo

    Cons: None

    Great speakers

    Written by: Poolside from Arizona on January 7, 2015

    Crutchfield Customer Review (What's this?)

    I can't say anything but good things about these speakers! WOW - as the other reviews have stated!

    Pros: These are great sounding speakers, easy to install - with many variations to fit any situation, can use singly or in pairs - I choose a pair, a pleasure to my semi-audiophile ears. Can't wait for summer to be able to listen to them more as the temperatures warm-up!!

    Cons: Can't think of one "con" to say about these.


    Written by: Matt from FL on October 24, 2014

    Crutchfield Customer Review (What's this?)

    While building my new home I wired everything up for my outdoor space fully intending on purchasing the Polk A7's. I wired up for four of them...well when it finally came time to make my purchase the A7s were not available anymore so naturally I just went up instead of down and got the A8 and Wow!!!! I have about a half acre back yard and I just bought two to get me started and they put out so much great sound well idk when I'll buy the other two don't even question it if you are thinking of these you will not be disappointed

    Pros: Amazing sound high and low! Excellent build quality! Easy to install! Aesthetically pleasing!

    Cons: None so far I love these speakers!

    Outstanding speaker

    Written by: Rodboy from Hamilton, Ohio on August 31, 2014

    Crutchfield Customer Review (What's this?)

    I have been looking for a good outdoor speaker for some time now. I have all polk speakers in my system but was concerned about their expertise in an outdoor environment. Due to brand loyalty I ordered this atrium 8 and have not been disappointed. I have never heard an outdoor speaker sound as good as this one. I have audiophile friends that have them all so I have listened to quite a few others. This speaker has unbelievable bass response. It's like having a sub outside. The mounting is very flexible. I have it wired to receive both stereo channels. I only bought one speaker to test it out before ordering another. On listening to just one I don't think I need two since it sounds so good. I could go on and on but I'll cut it short. I don't like typing a lot. My nickel's worth to someone looking for an outdoor speaker is to take a look at this one. There is no better in my opinion. But if you want to chase your tail to find something better and more expensive. be my guest. Good luck on that.

    Pros: Extremely good sound. Excellent bass. Very good mounting options.

    Cons: None

    Polk Atrium 8

    Written by: n from atlanta on May 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

    Written by: mike from mason city,iowa on September 9, 2013

    Crutchfield Customer Review (What's this?)

    works as expected



    Polk Audio Atrium8 SDI

    Written by: Peter from Westerly, RI on August 1, 2013

    Crutchfield Customer Review (What's this?)

    Sound great.



    Great product

    Written by: Corey R from Lebanon, Tn. on June 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

    Written by: Doug D. from Madisonville, LA on June 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!

    Atrium 8 SDI WH

    Written by: JohnG from Baltimore, MD on February 3, 2012

    Crutchfield Customer Review (What's this?)

    I have several Polk Audio speakers (7.1 home theatre in-wall with powered 10 inch subs and a couple of auxiliary LC80FX in ceiling speakers). I've never gone wrong with Polk and so far this speaker is no exception. The audio quality is excellent. I think the biggest factor in my overall satisfaction will be whether or not it holds up well to the elements, though, and it's too early to say.

    Pros: Great sound. Versatile (can be used as a single unit with two sets of drivers receiving signals from two sides of a stereo output, or as one of a set of multiple speakers in a conventional setup). Substantial mounting hardware that is user friendly.

    Cons: Fairly heavy. Fairly expensive.

    WOW- Super Powerful

    Written by: Eric from cicero, ny on June 25, 2011

    Crutchfield Customer Review (What's this?)

    purchased this for my backyard where my patio and pool is. This speaker is extremely powerful. Sounds clear, looks great, so glad I purchased this item. I put it under my eaves and added the niles weatherproof volume control from crutchfield. The volume control is a must have with this product. Awesome.



    want outdoor speakers? get these

    Written by: jerry r f from staten island on May 18, 2011

    Crutchfield Customer Review (What's this?)

    installation couldn't be easier if you layed them on the floor, best sound I've
    heard in outdoor speakers, bar none.Larger than others but mounting flexibility
    others don't have.



    Hands-on research

    What's in the box?

    Download owner's manual

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

    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.


    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.

    Product reviews from the Crutchfield Labs

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    Customer Q&A

    Crutchfield asked  
    Why did you buy this?

    wanted a good speaker, Lee helped and answered all my questions . [ dante  Dec 16, 2015 ]

    3 questions already asked

    We only have delivery within the United States and U.S. territories. The only other options are deliveries to military bases with an apo/fpo address or shipping to a freight forwarder with a U.S. address. Hope that helps. [ Kenny  Feb 03, 2016 ]  Staff
    Neil, You don't have to own a receiver, but you will need an amplifier to get the proper amount of volume out of these speakers. You can connect your TV to the amp. Each Speaker can handle about 125 watts rms, so look for something with a rating of 75 watts rms or better, but don't exceed 125 watts rms. Thank you, [ Dusty  Jan 26, 2015 ]
    The speakers only have inputs for speaker cable. Unless you have a method to convert those into AV components or something compatible with your TV, then a receiver is the only way I know of to use these with a TV. [ Amy  Jan 26, 2015 ]
    You will need a receiver. [ Brian  Jan 25, 2015 ]
    Hi Neil, these are excellent speakers and I love the clean sound coming out. Yes, you will need a Receiver. I have mine connected to a Niles amplifier connected to my Denon Receiver. [ Richard  Jan 25, 2015 ]
    The price listed is per single speaker on this particular model. [ Jeff  Dec 06, 2013 ]  Staff