Skip Navigation

Polk Audio Atrium8 SDI

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

46 Reviews | 9 questions - 13 answers

Watch a product review

Item # 107ATR8SDB

In Stock

Was: $249.99

Instant Savings: -$62.00

Add to Cart

Ask an expert

Our VA-based experts can help.




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.

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.

These speakers are physically large. They are loud but not super clear - they are a little muddy. But they do have a decent bass.

Anonymous, Hackettstown NJ

Featured Video:

What's in the Box:

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

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

    Polk Audio Atrium8 SDI Reviews

    Average Customer Review(s):

    (46 Reviews)
    rewards card

    Submit a review and enter to win a $350 rewards card

    Review this product

    Thanks for submitting your review

    Most reviews are processed and published within 5 business days. You will receive a confirmation email once your review has been published.

    Your Review

    Use the stars below to rate the overall product on a scale of 1-5
    Upload your photos

    Not visible. Email associated with order.
    (e.g., Charlottesville, VA)

    Additional Fields (optional)


    By submitting this review, you agree to our terms and review guidelines.

    Filter by rating

    Customer photos

    << >>

    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.


    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?

    Solid outdoor garden sound. I used the dual stereo (left and right channel) option where both channels are wired to one speaker. It lacks a little range but it sounds really good. I'm planning on adding another speaker because I prefer better imaging from separating the speakers. Very durable and weatherproof. [ Stephen  Jun 21, 2017 ]
    reviews [ AARON  Jun 02, 2017 ]
    To connect to my Sonos Amp for out door. [ William  Apr 22, 2017 ]
    its black [ timi  Apr 17, 2017 ]
    Had them at my other house Great outdoor speakers, plenty of bass and good clean sound [ CHRISTOPHER  Mar 22, 2017 ]
    Had 2 sets of BOSE outdoor speakers, but they didn't last very long, only a couple of years each before they started crackling. I also have a smaller pair of Polk outdoor speakers which I've had for years and they have held up beautifully. I wanted better sound, so I'm purchasing the larger speakers now. I hope I'm doing the right thing! [ Peter M  Mar 05, 2017 ]
    This speakers have 6 in woofer and two twetters. They can be connected like singels, one channel in one speakers or combined, two channels in one speaker. Sound is good for outside speakers and support any weather. Are exelent speakers for backyard. [ Manuel  Feb 14, 2017 ]
    I am hoping that these will be powerful enough to provide loud enough music for the gym that I own. [ Frank  Aug 24, 2016 ]
    good price [ eric  Aug 22, 2016 ]
    large woofer size, aluminum tweeter, connect stereo source into one speaker for patio area not suitable for stereo sound [ Jan  Jul 15, 2016 ]
    Love Polk Audio equipment which I already own. [ PALMER  Jun 27, 2016 ]
    Were hoping these outdoor speakers will work great at our beach house! Also looking forward to the free music player that comes with them. Thanks [ David  Jun 13, 2016 ]
    have other Polk speakers [ George  May 10, 2016 ]
    Excellent reviews and a single speaker is convenient for my particular patio application. [ Michael  Apr 13, 2016 ]
    wanted a good speaker, Lee helped and answered all my questions . [ dante  Dec 16, 2015 ]
    Had the best reviews. Especially comments saying these speaker have the best bass response. [ Wayne  Jun 22, 2017 ]
    sound good [ francis  Jun 07, 2017 ]
    Recommendation from friend and listened to them. [ John  May 26, 2017 ]
    great price and def tech amp $250 off offer [ ronald  May 21, 2017 ]
    Good quality [ Channing  May 18, 2017 ]
    They sound great! [ Troy  Apr 30, 2017 ]
    I reviewed several outdoor speakers and the Polk Atrium speakers are designed to meet/exceed mil spec for weather durability. They received good reviews from other people for sound quality too. [ Giovanni  Apr 11, 2017 ]
    excellent speaker [ Victor  Mar 23, 2017 ]
    needed outdoor speakers for the pool [ mike  Mar 05, 2017 ]
    Brand recommended by a professional that likes this brand. Price was good. Free shipping. I have ordered from Crutchfield before and I really like the company and business model. [ Steven  Mar 04, 2017 ]
    customer reviews [ BROOKE  Feb 26, 2017 ]
    These outdoor speakers are as good as any I have heard. Nice bass and midrange. I tend to play louder than my neighbors might like only because they sound sooo great! [ O  Feb 01, 2017 ]
    Awesome indoor / outdoor speaker. Fantastic sound. Would definitely purchase again! [ Kevin  Jan 14, 2017 ]
    Sale/reviews [ Michael  Jan 01, 2017 ]
    Previously purchased these outdoor speakers for a patio that faced out into the open yard and the sound provided was absolutely robust even at a distance. [ Will  Oct 30, 2016 ]
    Excellent sounds from these outdoor speakers plus Polks reputation. [ Richard  Sep 24, 2016 ]
    I'm looking for a quality outdoor speaker that is not too large and will mount on my patio beam fairly inconspicuously. [ JOHN  Sep 05, 2016 ]
    Two tweeters, dispersive speaker face, Polk Audio, very good frequency range. [ Trent  Aug 13, 2016 ]
    I like the mounting style. Good Sound specs. On sale [ Doug  Aug 01, 2016 ]
    The Quality/Price equation was very high [ U. Han  Jul 21, 2016 ]
    I spent a great deal of time researching outdoor speakers. I needed a weatherproof, stereo input speaker for 2 separate outdoor patio areas. I read the reviews and was impressed with the experiences of other customers. I also want to thank Tony the AV Adviser for all his help! Tony's Bio: [ Michael  Jul 15, 2016 ]
    I selected this pair as it will provide the big sound I need for a larger outdoor area. I am using the Atrium 6's is smaller outdoor areas. [ GERARD M  Jul 12, 2016 ]
    Sound quality [ Suresh  Jun 02, 2016 ]
    Great holiday sale price! [ Warren  May 30, 2016 ]
    help from adviser [ WILLIAM  May 22, 2016 ]
    The reviews all sounded good [ ERIC  May 16, 2016 ]
    price & quality of product [ Bruce  May 12, 2016 ]
    Seemed like a good value [ Kurt  Apr 26, 2016 ]
    Great outdoor bass response and tonal quality. [ JIM  Mar 25, 2016 ]

    9 questions already asked

    I have them wired to my Sonos Connect: Amp, I highly recommend Sonos. Better than Bluetooth [ James  Jun 10, 2017 ]
    I bought the Atrium8 to replace a speaker that died and specifically because it offers the dual input mode (both L and R inputs are driving a single speaker) that the old speaker utilized. It is in a protected space under the garage eave and it works great when I'm outside washing the car or working in that general outdoors area. It sounds awesome. That said, it really is just a speaker that any Bluetooth capable receiver can power. I happen to use an Onkyo TX-NR545 which works really well, drives additional speakers and although I don't use the Bluetooth feature of this receiver that often (I have gotten attached to satellite radio as my primary music source), it is easy to pair and sounds great. When friends come over and want to connect their device and listen to their playlists this Onkyo receiver is about as easy as I think it gets. [ Pete  Jun 09, 2017 ]
    There are two reasons to do the 4 wire set up: 1) you can use lower gauge wire and when combined they give you better performance over the same gauge single wire. 2) since you are using outside if one wire was ever clipped you'd still have a pair of wires to use. It totally depends on how long your outdoor run is and how complicated fated your setup is. I personally use the 4 wire set up with medium gauge. Good luck and enjoy the speakers. [ Mark  Jun 03, 2017 ]
    I have several channels on my amp and run them separate as left and right. Good luck, I have mine outside by the pool and they can fI'll a big area pretty well [ RODNEY  Dec 03, 2016 ]
    Thanks for your question. For information on comparing two or more models I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget. [ Kenny  May 17, 2016 ]  Staff
    yes can pair in a zone .you will notice more base fro the 8 but volume should be the same [ CAREY  Feb 25, 2016 ]
    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