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Polk Audio Atrium4

All-weather indoor/outdoor speakers (Black)

Item # 107ATR4B

Turn your backyard into an outdoor concert hall with Polk's Atrium4 speakers.

Turn your backyard into an outdoor concert hall with Polk's Atrium4 speakers.

Top seller

Item # 107ATR4B

Ships free today

In stock

$229.00 -$80.00 Price break

$149.00 pair

Other options

About 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.

READ LESS

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
  • MFR # AM4085-A

What's in the box:

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

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Polk Audio Atrium4 reviews

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236 reviews

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More details on the Polk Audio Atrium4

Stacey B.

Features & specs

Enclosure Acoustic Suspension
Tweeter Type Hard-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
The Polk Audio Atrium4 replaces these items:

Product Research

Outdoor Speaker
Driver Technology
Enclosure Design
Connections
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.

Connections

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.

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Customer Q&A

20 questions already asked

Q
Will these speakers work wirelessly With Samsung Q80R system?
[ Curt  Apr 11, 2020 ]
2 answers
A
No. They are wired speakers.
[ Bob  Apr 11, 2020 ]
A
No these are not wireless speakers, they have to be connected through the binding posts
[ Jay  Apr 11, 2020 ]
Q
Will these mount on the ceiling to be used as down firing Atmos speakers?
[ Richard  Mar 31, 2020 ]
3 answers
A
Yes, shouldn't be a problem
[ ben  Mar 31, 2020 ]
A
You can mount them anywhere and point them, however I think these are better outdoors and better options exist for what it sounds like you are needing.
[ Brad  Mar 31, 2020 ]
A
Yes, I have these speakers mounted outside under a patio and love them.
[ Norman  Mar 31, 2020 ]
Q
I have a Panasonic receiver that has a rated output of 100W at 6 ohms. Can I use the atrium 4 since it is rated at 8 ohms?
[ Shields  Mar 10, 2019 ]
2 answers
A
Yes you cam
[ Joan  Aug 20, 2019 ]
A
Hi, I am not an expert though my opinion is it is ok to use 8 ohm speakers with a 6 ohm receiver. I also think you will need turn up the volume to get the same volume you would get from an 8 ohm receiver. The pro's at Crutchfield should be able to help you out.
[ John  Mar 10, 2019 ]
Q
are these Bluetooth compatible?
[ Mike  Jul 14, 2018 ]
4 answers
A
No these are hard wired
[ Michael  Jul 19, 2018 ]
A
No
[ Trent  Jul 19, 2018 ]
A
No
[ Robert  Jul 19, 2018 ]
A
No they are not.
[ Alfred  Jul 19, 2018 ]
Q
Is there a back plate for this to cover the wire connections?
[ r  May 01, 2018 ]
3 answers
A
No there is not. I have mine both installed on the ground and on the house and nothing is visible.
[ David  May 01, 2018 ]
A
No but I wish they did but I put dielectric grease on the wires and it works
[ Richard  May 01, 2018 ]
A
No
[ Rebecca  May 01, 2018 ]
Q
Hi - I am looking for some out door speakers, however, I live in a very salt weather environment (an Island in the Caribbean). Are the brackets painted mild steel? Does anyone have them mounted on a boat (in the ocean, not fresh water) for instance?
[ Rolf  Apr 16, 2018 ]
3 answers
A
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 ]
A
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.
[ Rebecca  May 01, 2018 ]
A
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 ]
Q
can these be hooked to a computer for streaming from, say Pandora?
[ Bette  Apr 05, 2018 ]
3 answers
A
There are the normal speaker wire terminals.
[ Michael  Apr 05, 2018 ]
A
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 ]
A
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 ]
Q
Hi: Can be used on a beach house outdoor?
[ Juan  May 30, 2017 ]
5 answers
A
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 ]
A
Yes
[ PASCAL  May 30, 2017 ]
A
Yes
[ PASCAL  May 30, 2017 ]
A
Yes, I think you will like it
[ PHIL  May 30, 2017 ]
A
Should be fine. As with anything in salt air the life might be reduced vs a normal porch.
[ Chad  May 30, 2017 ]
Q
Can these speakers be hooked up to an outdoor television? Are the speakers Bluetooth capable?
[ Ritchie  Jan 13, 2017 ]
3 answers
A
No
[ PASCAL  May 30, 2017 ]
A
Yes they can be hooked up to a outside tv and no they are not Bluetooth.
[ Johnny  Jan 13, 2017 ]
A
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 ]
Q
can these speakers be painted?
[ VAMSI  Jul 23, 2015 ]
5 answers
A
No
[ PASCAL  May 30, 2017 ]
A
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 ]
A
Yes. Remove grill and cover cone and tweeter. I painted to match an outdoor space at a country club.
[ PAUL J  Jul 24, 2015 ]
A
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 ]
A
I would say yes, use a spray paint so the grill doesn't get clogged.
[ THOMAS  Jul 23, 2015 ]
Q
CAN THESE SPEAKERS SIT OUT IN THE ELEMENTS OR DO THEY NEED TO BE UNDERCOVER?
[ JIM  Apr 06, 2015 ]
6 answers
A
Yes
[ PASCAL  May 30, 2017 ]
A
Have them installed on an outside wall about a foot under the eve. No problems.
[ JESSE  Apr 08, 2015 ]
A
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 ]
A
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 ]
A
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 ]
A
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 ]
Q
Are these speakers active or passive? Do I need a separate amplifier / receiver or can I wire them directly to a bluetooth device?
[ Adam S  Jun 04, 2014 ]
1 answer
A
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
Q
What is outdoor life of these speakers?
[ WildBill  Mar 13, 2014 ]
3 answers
A
Back porch
[ PASCAL  May 30, 2017 ]
A
5 years parts and labor
[ TRAVIS  Mar 14, 2014 ]
A
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 ]
Q
where would the mounting brackets only for polkaudio atrium 4 speakers be purchased ?
[ hollywood  Jul 19, 2020 ]
2 answers
A
In Crutchfield!
[ WILFRED  Jul 21, 2020 ]
A
No clue, mine came with the speakers.
[ Kenneth W.  Jul 21, 2020 ]
Q
What is the RMS W for these speakers? I see the peak power is 80W
[ Dave  Mar 27, 2019 ]
1 answer
A
That is actually the top RMS watts these speakers should get. We don't have a peak power rating for them My Bio: https://www.crutchfield.com/bio/Paul
[ Paul  Apr 13, 2019 ]  Staff
Q
Do these speakers need to have an amplifier hooked up to them or are they basically a "plug and play" setup?
[ Rob  Jun 04, 2018 ]
1 answer
A
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 ]
Q
I want to hang a pair of these on the side of my tv and use them for dolby atmos speakers, I would like to know if you can angle them toward the ceiling with the brackets that they come with?
[ chuck  Apr 28, 2017 ]
2 answers
A
I USED THESE OUTSIDE ON MY PATIO. I MOUNTED THE BRACKET VERTICALLY AND THE SPEAKER CAN BE ADJUSTED LEFT OR RIGHT. IF YOU MOUNT THE BRACKET HORIZONTALLY, YOU SHOULD BE OK. THE SPEAKER CAN BE ANGLED UPWARD..BUT THE SPEAKER WILL BE TOO BIG TO ANGLE STRAIGHT UP. HOPE THIS HELPS
[ jeff  Apr 30, 2017 ]
A
Only if you hang the brackets horizontally.
[ RUBEN A  Apr 29, 2017 ]
Q
How would these work for wall mount surround sound speakers for your home theater system in your house?
[ Cody  Apr 06, 2016 ]
2 answers
A
Excellent!
[ WILFRED  Jul 21, 2020 ]
A
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 ]
Q
The woofer seems blown. Can I open this speaker to replace woofer or is it sealed shut?
[ Jock  Feb 06, 2016 ]
1 answer
A
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: http://www.crutchfield.com/Support/Bio.aspx?bio=159
[ Larry  Feb 10, 2016 ]  Staff
Q
How large of an area would you use these speakers?
[ Kevin  Jan 28, 2014 ]
5 answers
A
I have a patio that is about 20x40 and these work perfectly in that space.
[ MICHAEL  Jan 31, 2014 ]
A
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 ]
A
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 ]
A
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 ]
A
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 ]
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Polk Audio Atrium5
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In stock
105 reviews
$299.00 pair
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Get better bass response

The Polk Audio Atrium5 offers these features:
  • a 5" woofer
  • a frequency response of 60-25,000 Hz
  • handles up to 100 watts
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