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Polk Audio Atrium8 SDI

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

Item # 107ATR8SDB

Use Polk's Atrium8 SDI speaker when you need maximum flexibility along with premium outdoor sound.

Use Polk's Atrium8 SDI speaker when you need maximum flexibility along with premium outdoor sound.

Item # 107ATR8SDB

In stock
C$299.99 each

About 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.


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
  • impedance: 8-ohm stereo (dual-input) or 4-ohm mono (single-input)
  • 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
  • MFR # AM8085-A

What's in the box:

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

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Polk Audio Atrium8 SDI reviews

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More details on the Polk Audio Atrium8 SDI

Stacey B.

Features & specs

Enclosure Bass Reflex
Tweeter Type Hard-Dome
Midrange Size ---
Woofer Size 6-1/2
Woofer Composition Polypropylene
Woofer Surround Butyl rubber
Power Range (watts) 10-125
Sensitivity 91 dB
Impedance (ohms) 8
Frequency Response 45-27k Hz
Connector Type 5-way post
Height (inches) 12-13/16
Width (inches) 8-5/8
Depth (inches) 9-7/16
Weight (pounds) 9.7
Mounting Bracket Included Yes
Parts Warranty 5 Years
Labor Warranty 5 Years
The Polk Audio Atrium8 SDI replaces these items:

Product Research


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.

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.

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. For a stereo configuration, 4-conductor wiring is required, and one Atrium8SDI is equivalent to a pair of 8-ohm speakers. For traditional single-input use, only 2-conductor wiring is needed and the speaker impedance is 4-ohms.

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).

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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Customer Q&A

Crutchfield asked: Why did you buy this?
Positive reviews and price [ ED  Jun 15, 2019 ]
Already have a pair in our pergola. Love the sound. Needed another pair at another location. No doubt I would by them again. [ Roy  Jun 14, 2019 ]
I purchased these outdoor Polk speakers because my indoor Polk speakers that I have been using for ten years have been great performers. [ Eric  Oct 05, 2018 ]
Add to existing Atrium 7's in a separate outdoor area. [ B  Jul 20, 2018 ]
good quality, competitive price [ Michael  Jul 15, 2018 ]
It got good reviews and my indoor speakers are Polk which I really like [ Chris  Jun 27, 2018 ]
Needed new speakers for out door area. Like the stereo option of these speakers and Polk is always good quality sound. Tired of cheap outdoor speakers that don't last and don't sound good. [ Scott  Jun 11, 2018 ]
I'm using the Sonos Connect Amp and not sure if I want to use one speaker or two. This has great reviews and gives me the unique option of trying just one and if that doesn't work, I can just add another Atrium8. [ Jared  Jun 06, 2018 ]
#1 It's a Polk Product which I have been a FAN of for many many years and #2 it's from CRUTCHFIELD they have never let me down #3 The Best STAFF ever. Thank You Crutchfield, John L. [ JOHN l.  Mar 07, 2018 ]
We install these speakers on Commercial Fishing boats. They stand up very well to the harsh ocean environment. They rock the ocean! Loud and proud! [ tkmarineelectronics  Feb 09, 2018 ]
Great speakers for outdoor use. Speakers have lots of power / volume, are exceptionally clear. Two thumbs up...... [ M  Sep 06, 2017 ]
Reviews seemed to indicate a good performing outdoor speaker that will work well to fill backyard with quality sound. [ William  Aug 24, 2017 ]
I've ordered them before and they are great speakers.... [ Drew  Jul 31, 2017 ]
Great speaker. I currently have 4 of them and will use this one as my center speaker [ Robert  Jun 29, 2017 ]
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 ]

6 questions already asked

Can I run two speakers as a stereo set and one individually with both channels, all off the same receiver? 3 speakers two zones.
[ Tim E  Apr 12, 2020 ]
1 answer
Yes. The 3rd speaker can have a stereo pair of wires connected. Ensure to read the instructions from Polk Audio.
[ Allen  Apr 12, 2020 ]
do these work with google home?
[ Dennis  Mar 04, 2019 ]
3 answers
It depends on the device that is powering the speaker Enter an answer to this question.
[ Rob  Mar 04, 2019 ]
Don't know
[ CHRISTOPHER  Mar 04, 2019 ]
This is just a speaker, they have no 'smart home' type components built into them. You connect them to an amplifier and music source. If you have an Amp or something that's powering them that's capable of integrating into an ecosystem like Google Home, then yes. But natively by themselves no.
[ David  Mar 04, 2019 ]
What is the +/-3db limit frequency responnse of the Atrium 8?
[ Steve  Nov 22, 2018 ]
1 answer
The frequency response on the Atrium 8s is 45 - 27,000 Hz. If you have any other questions about the specs on those Polks or any other speakers call or chat with one of our Product Advisors --Cosmo
[ Cosmo  Nov 28, 2018 ]  Staff
I would like to put these on the doors of my 16x12 ft work shop so I can listen to music inside and outside just by opening or closing the doors. My question is how would they sound in a smaller space like my shed seeing how they are made for large open areas?
[ Bmoss  Jul 16, 2018 ]
1 answer
This is my second set of Polk Atrium SDI speakers. I've been able to mount both sets over the years in optimum spots on patios and each time, the sound has been very good. I would think they would be very good in an enclosed area such as yours, similar to most interior only speakers. Remind you that the woofer is not the size of typical indoor speakers, i.e. 8-10" so the bass may not be as good as you could get, but I don't know why you won't be pleased with these inside and out providing they are being driven by a capable source.
[ MARVIN  Jul 20, 2018 ]
I am looking at putting this is an automotive environment with a head unit designed for 4 ohm loads. Since its an 8 ohm speaker what can I expect?
[ Kevin  Mar 26, 2018 ]
1 answer
I don't know what would happen to these speakers if you put them in a vehicle but I have put home speakers in a vehicle before and it's a waste of time they were destroyed pretty fast as far as putting these speakers on a home system they rock well worth the money
[ Jeff   Mar 26, 2018 ]
Can this speaker be used as a center channel speaker in a home theater set up outside?
[ Drew  Jul 15, 2017 ]
5 answers
Drew, I do not know for sure, the Atrium 8 SDI has the two 1in tweeters & center channels do not have any !! So........ I' am thinking the 61/2 woofer in he Atrium 8 SDI would act as a center channel just fine, however i have no idea about the tweeters for center sound quality !! Just a trial & error hook up !! I guess its not alot of help, sorry !! Charles B
[ CHARLES B  Jul 19, 2017 ]
HI Drew -- I have used it in solo and also with two other speakers, though never in a home theater. I use it outdoors for music entertainment only. I can't think of a reason why theater sound would be different than music, but .... I'm not 100% expert. Bottom line -- yes to outdoors and yes with other speakers. -- Paul
[ Paul  Jul 17, 2017 ]
Depending on what you want. It can be used as center speaker. Enter
[ George  Jul 17, 2017 ]
I have not tried to do that with my speakers but I don't see why not these speakers are loud and clear with a fair amount of bass even if they don't work right for a center speaker you'll have some really awesome speakers
[ Jeff   Jul 17, 2017 ]
I can't see what not. It has great midrange and up frequency response. Enjoy it
[ Philip  Jul 17, 2017 ]

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