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Polk Audio Atrium4

All-weather indoor/outdoor speakers (Black)

Item #: 107ATR4B

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75 Reviews

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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.

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

    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 Atrium4 Reviews

    Average Customer Review:

    75 reviews
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    Pleasantly surprised

    Written By Derek P, Louisiana on Sunday, November 29, 2015

    I was pleasantly surprised by the sound of these speakers at a reasonable price point.

    Polk Outdoor Speakers

    Written By Ryan, Spoakne on Thursday, November 05, 2015

    Crutchfield Customer Review (What's this?)

    Great Product, Great Price

    polk atrium 4

    Written By mac s, Mississippi on Thursday, October 08, 2015

    Crutchfield Customer Review (What's this?)

    speakers sound very good excellent mounts for boat hard top

    Pros: sound quality , mounts

    Cons: could be more efficeint

    Great Speakers

    Written By Smartmouth, Virginia on Tuesday, September 01, 2015

    Crutchfield Customer Review (What's this?)

    Great sound.

    Pros: Great sound.

    Polk Atrium 4

    Written By warcry, Kansas on Sunday, August 09, 2015

    I bought these and though somewhat lacking in bass(my sub picks up the slack),I am very impressed by the sound quality.Smooth seamless trsition from midrange to the higher frequencies.Typical quality as I expected from Polk.Audio bargain!

    Pros: Sound quality

    Cons: None

    Good Outdoor Soeaker

    Written By kdett, Milford, MI on Wednesday, August 05, 2015

    Crutchfield Customer Review (What's this?)

    I purchased 6 of the for outside my house. Since they are in smaller I put them in outdoor area where i didn't need a whole lot of speaker. I am happy with the price and performance.

    Pros: Eveything

    Cons: None

    Polk outside speakers

    Written By JT, New York on Monday, July 20, 2015

    Crutchfield Customer Review (What's this?)

    Easy to install sound great

    Pros: Bees cant get in speakers

    Cons: none

    Great Little Speakers

    Written By Anonymous, Minnesota on Wednesday, July 15, 2015

    Crutchfield Customer Review (What's this?)

    Fantastic little speakers, was pleasantly surprised by their sound, haven't gotten to be able to test the no bass claims that I've read, but beyond satisfied so far. The size is perfect, glad I didn't purchase anything larger! Thanks again Crutchfield!

    Pros: Size, sound, construction

    Cons: None so far

    Good Buy

    Written By KG, Illinois on Monday, June 08, 2015

    Crutchfield Customer Review (What's this?)

    I replaced a pair of Insignia outdoor speakers with these, because after 2 years they sounded very bad on low range. So far these sound great. Very clear on Highs and Lows are well balanced.

    Pros: Price, size, performance

    Cons: none

    A little Polk with Big Polk sound

    Written By Jeff M., Martinez,Ca. on Tuesday, May 26, 2015

    Crutchfield Customer Review (What's this?)

    I was surprised by the sound that the Atrium 4 produces. I have owned a surround theatre system by Polk since 2003 and have always been impressed by it but when I hooked up the Atrium 4 speakers outside I had to ask myself if the music was coming from my surround theatre set up or the new Atriums. Great job Polk !

    Pros: Nice compact design and easy mounting system.

    Cons: None.

    atr8um 4 Speakers

    Written By john, grapeview wa on Friday, May 22, 2015

    Crutchfield Customer Review (What's this?)

    Good speakers for money work great on deck

    Pros: Good sound quality

    Cons: None

    Great sound in 21ft Bowrider!

    Written By J, Kentucky on Friday, April 24, 2015

    Crutchfield Customer Review (What's this?)

    Sounds great in a 4-speaker Marine set-up driven with a Rockgate Amp. Compact enough to place in side rails beside seats, Bass is adequate and what physics dictates for a speaker 9 in tall and 7 in deep - it won't sound like a full size but way good for a compact.

    Pros: Compact size, weather resistant, above average sound for compact speaker

    Cons: None

    Good Value for the money

    Written By Phil H., Palm Coast, Florida on Tuesday, April 14, 2015

    Crutchfield Customer Review (What's this?)

    Replacing a pair of no name brand from another retailer (mistake!) for the out side pool area that lasted two years. The brackets and speaker case are affected mostly due to the weather here in Central Florida, beating sun rays, rain, and pool chemicals. Had them for three months and the brackets have held up, no rust. The speaker case is like new and the speaker delivers clear crisp sounds. Could use more bass, but for the $, it does the job.

    Pros: Price, brand name, eye appeal, sound and construction

    Cons: Lack of bass

    Polk indoor outdoo speakers

    Written By Good sound, Ohio on Sunday, January 11, 2015

    Crutchfield Customer Review (What's this?)

    Own several pairs of these, four sets to be exact. They are quality speakers and sound good in our Crossfit gym as well as around our outdoor pool. Not the best but do the job.

    Pros: Nice look, holding up well after couple years outside already. Sound ok for our needs.

    Cons: Could drive more bass.

    Good Speakers

    Written By Anonymous, Texas on Sunday, November 23, 2014

    Crutchfield Customer Review (What's this?)

    Good speakers for exterior use. Good sound quality.

    Good Value Outdoor Speakers

    Written By John, Boise, ID on Sunday, October 19, 2014

    Crutchfield Customer Review (What's this?)

    Good Value Outdoor Speakers, not the best but pretty good value and quality for the money

    Pros: Quality construction, good value

    Cons: not the best sounding

    Atrium 4

    Written By Lee, Tallahassee on Tuesday, October 07, 2014

    Crutchfield Customer Review (What's this?)

    Some people call me "old school" because I have preferences developed in the 80's.I was actually trying to find some David 5000s and the Polks were a second choice. I'm using then as aux rears in a van. I expect they will do great when they get set up with their own amp.

    Pros: Full crisp sound.

    Cons: Lack of bass which isn't a problem when used with a 12" sub.

    Polk Atrium4

    Written By Dwayne R., Dickinson, TX on Sunday, August 24, 2014

    Crutchfield Customer Review (What's this?)

    Picked these up while on sale and then applied my Crutchfield rewards points for an "out the door" price of $35! They sound great. Nice and balanced. Im using them on the patio. They are powered by my Onkyo receiver's second zone, so I can't adjust bass/treble, but they still sound good.

    Polk audio Atrium 4

    Written By pafasu, Oceanside, NY on Friday, August 01, 2014

    Crutchfield Customer Review (What's this?)


    Pros: Sound quality is good a loud levels

    Great things come in small packages

    Written By oriole26, lafayette,la on Sunday, July 13, 2014

    Crutchfield Customer Review (What's this?)

    Amazing sound form a small speaker. No doubt the best purchase for the size of our outdoor area. Amazing highs and lows from this Polk.

    Pros: great range and value

    Cons: none to date

    Polk Atrium 4's

    Written By Jeff, Harbor Springs, MI on Friday, July 11, 2014

    Crutchfield Customer Review (What's this?)

    Sound great and easy to install. I have them installed outside on the patio, installation was easy, however the 5 way binding posts do not support a standard banana plug. The angle of the posts blocks access for a standard banana plug from the back of the posts. I had to insert the banana plugs into the binding post screw opening and then snugged them down. The connection seems to work fine and they continue to sound great.

    Pros: Value/Price. Easy to install. Sound and look great.

    Cons: Standard banana plugs do not fit due to the angle of the posts.

    Quality for $$$

    Written By Anonymous, Missouri on Tuesday, June 17, 2014

    Crutchfield Customer Review (What's this?)

    Good quality speaker. Good crisp clean sound

    Pros: Easy to install, good sound

    Cons: Lack bass

    way better than imagined

    Written By Anonymous, Stoneham, MA on Sunday, June 08, 2014

    Crutchfield Customer Review (What's this?)

    These speakers rock! Not very bass heavy but nice and crisp. I'm not out to rock the neighborhood with these but I could easily fill my 650 Sq ft patio with nice sound. They sound nice at low volume as well. I'm going to use these as an outdoor theater setup too. Stop thinking about them and just get them.

    Pros: Good range for being outdoors. Loud and acurate.

    Cons: None

    Polk Audio Atrium4

    Written By Anonymous, Clifford, VA on Friday, June 06, 2014

    Crutchfield Customer Review (What's this?)

    Very good sounding speakers for the size, fit well on my back porch, rugged and easy to mount

    Pros: Easy mounting

    Incredible Value

    Written By Tim, Highlands Ranch, CO on Friday, April 18, 2014

    I installed these speakers on my side patio and my back patio 2 years ago. I've been very pleased with the quality of sound on these speakers. Sound is crisp and bass is good. While I rarely write reviews, I felt inspired to do so as I'm writing this on my side patio with Kings of Leon playing through Pandora on my iPad streaming through Airport Express to my older Onkyo receiver. I'm really pleased with these speakers and planning to install another pair in my basement for working out. What I like is the quality at low and high volume. Thank you Crutchfield for helping me figure out the install.

    Pros: Quality of sound - Small enough (some speakers are really large) - Still working after 2 full seasons of Colorado's winter and summer extremes.

    Cons: None - I'm really pleased with these speakers.


    Written By joe, Golden, CO on Friday, March 21, 2014

    Crutchfield Customer Review (What's this?)

    Based on the majority of reviews, I though these would have much better sound quality. They have virtually no bass. Turning up the bass on the receiver only caused distortion. I really debated about spending more money on other speakers, and now I will pay the $$ to return these. I don't understand all the five stars.

    Cons: no bass

    Outdoor Speakers

    Written By Dave S, Anchorage, Alaska on Tuesday, January 14, 2014

    Crutchfield Customer Review (What's this?)

    I purchased two pair of these speakers to mount on the two outdoor decks we have on our cabin which is about 100 miles North of Anchorage. This was the Granddaughters can ice skate on the beaver pond to wonderful sounds of Christmas over these speakers. They were easy to install and perform great even at -30 degrees.

    Pros: High quality sound and easy to install.

    Cons: None

    Polk Audio Atrium 4 Outdoor Speakers

    Written By Barry W., Saugus, Ca on Wednesday, December 11, 2013

    Crutchfield Customer Review (What's this?)

    We gave these speakers to our son-in-law for his birthday after they had their backyard landscaped. He is very pleased with them. The sound of the speakers is crisp & clean. They handle the volume well to the point that the neighbors might object!

    Pros: Good design, easy to install. Overall great quality.

    Cons: None.

    Polk Atrium 4

    Written By Brett M, Charleston, WV on Tuesday, November 12, 2013

    Crutchfield Customer Review (What's this?)

    These speakers have a great range and fantastic sound quality. I installed them in my work shop and it fills the area with the best sound quality you could ever want.

    Pros: easy to install and adjust direction great sound

    Powerful Speakers

    Written By AudioGuy, La Plata, MD on Wednesday, October 23, 2013

    Crutchfield Customer Review (What's this?)

    These speakers really kick out a lot of sound. You have to hear them to believe them!

    Pros: Good dynamic range from top to bottom. Surprisingly lightweight and easy to install.

    Polk Audio Atrium4

    Written By Anonymous, wilton,ny on Thursday, August 15, 2013

    Crutchfield Customer Review (What's this?)

    very pleased with the sound &easy to install


    Written By rs, Great Bend, KS on Wednesday, July 31, 2013

    Crutchfield Customer Review (What's this?)

    The speakers are working very well on my patio. Not sure if they sound any better than the speakers that I bought from a different retailer for half the money. Had the old speakers on the patio, they were good. Bought the Polk speakers. Moved the old speakers into the garage and hung the Polk on the patio. Not much difference in sound.

    Pros: Solid case. Easy bracket set up. Good sound.

    Cons: Are they twice the money better??

    Polk Audio Atrium4

    Written By madclark, Pa on Wednesday, July 10, 2013

    Crutchfield Customer Review (What's this?)

    Great sound. Great price!

    Pros: Easy install. Looks Good! Polk rules!!!

    Atrium speakers

    Written By MeBe, Everett, WA on Monday, July 08, 2013

    Crutchfield Customer Review (What's this?)

    These were a nice "freeby" speaker set, I use them in my 7.1 setup and they do an admirable job and compliment my other Polk speakers.

    Great Complement to Summer

    Written By S, East Stroudsburg, PA on Monday, July 08, 2013

    Crutchfield Customer Review (What's this?)

    For the size and price these Atrium 4's sound fantastic. We ran some 16 gauge wire out to the back deck and mounted these in both corners so we could have them face the house or swivel out to the the patio. The sound is great with no distortion up to rather high volumes. Wire hook up is easy with the 5-way posts and installation is also easy with only two wood screws needed for each speaker bracket. Easy to pop into the brackets once mounted but more difficult to pop out. Solution, just slide the bracket and speaker up and out of the screw mounts and take the whole thing inside when needed. Very convenient. These also appear to be very versatile with multiple mounting options/angles. Great value, great sound.

    Pros: Great sound with no distortion up to rather high volumes, handsome, easy to pop in.

    Cons: Not so easy to pop out.

    Great for the outdoors

    Written By Anonymous, Dallas, TX on Monday, July 01, 2013

    Crutchfield Customer Review (What's this?)

    Got these as part of a promo deal. I am using them outside on a balcony. They were easy to setup, sound great and look great. Nice solid build.

    Pros: Sound great Solid build Look great

    Cons: None

    Polk speakers

    Written By JBudz, Cairo, NY on Sunday, June 23, 2013

    Crutchfield Customer Review (What's this?)

    Great improvement to our outside deck and pool area, they sound really good and even better as you walk further away from them. Easy to install too

    Polk Audio Atrium4 Outdoor Speakers

    Written By Jim, Chicago, IL on Friday, June 21, 2013

    Crutchfield Customer Review (What's this?)

    Easy install, great sound

    Good quality speaker

    Written By AJ, Lawrence, KS on Friday, June 21, 2013

    Crutchfield Customer Review (What's this?)

    I use them for a patio, and delivers the right sound for a patio. I use the Atrium 7 for a larger & open pool area and main outdoor speakers.. These speakers will do great for a smaller area. Otherwise, step-up to the Atrium 7. Different sound category, different price category as well.... Different size as well. Atrium 7 are really bigger. If you hesitate, go for the Atrium 7, you won't be disappointed.

    Pros: Quality built Great sound for a small/medium size area Smaller size make them easy to use in smaller outdoor spaces

    Cons: Not as deep as Atrium 7, but should not be a surprise....

    Great sound

    Written By DougK, Maryland on Thursday, June 20, 2013

    Crutchfield Customer Review (What's this?)

    Excellent overall sound. This Atrium set was included as part of a promotion with Polk and Crutchfield and were not an intentional purchase other than I did have a use for them. I decided to hook them up in a spare room (inside not outside) to an older Sony receiver. Even if they weren't included in the deal with my other purchase, I would have absolutely purchased these. The sound is full and rich and plenty of volume. Great product for a great price. Highly suggest for the price for indoor or outdoor use!

    Pros: great sound

    Cons: none found

    Polk Audio Atrium 4

    Written By GregS, Hendersonville,NC on Monday, June 17, 2013

    Crutchfield Customer Review (What's this?)

    Got these free by ordering 7 other Polk speakers. Haven't installed them yet, but if they sound anything like the others I'm in for a great time listening outdoors...and the price was right!

    Polk Audio Atrium4

    Written By Anonymous, United States on Wednesday, June 12, 2013

    Crutchfield Customer Review (What's this?)

    great sound and performance

    Pros: easy to mount and to wire

    Cons: none

    Not Used

    Written By killerjimbo, Reading, Pa. on Thursday, June 06, 2013

    Crutchfield Customer Review (What's this?)

    I have not used these speakers but because they are Polk the can't be anything but better than average

    Pros: The name should tell you something.

    Cons: The name should tell you something.

    Polk Audio Atrium4

    Written By Tom B, Westerly, RI on Wednesday, June 05, 2013

    Crutchfield Customer Review (What's this?)

    They sound great on the deck.


    Written By Ron, Iowa on Monday, June 03, 2013

    Crutchfield Customer Review (What's this?)

    Received these in a deal that they throw them in when you purchase x amount of polk speakers. Put them up on my back patio under the eaves and wow. Usually you do not get real good bass from outdoor speakers and these really rock. I was amazed in the sound they create.

    Great outdoor speakers!

    Written By Toby L., Davidsonville, MD on Monday, June 03, 2013

    Crutchfield Customer Review (What's this?)

    Great outdoor speakers and, best of all, they were FREE on promo!

    Good Outdoor Speakers

    Written By RandyW, Hot Springs, AR on Thursday, May 30, 2013

    Crutchfield Customer Review (What's this?)

    Good speakers for the price, housing is heavy duty and durable with good brackets. Units are easy to mount and can be directed to where you want the music.

    Pros: Compact

    Cons: None so far

    Great little speakers

    Written By X, Arlington, VA. on Thursday, May 30, 2013

    Crutchfield Customer Review (What's this?)

    Crutchfield and Polk always seem to have some sort great speaker deal going. Since I bought over a certain dollar amount of Polk speakers, they threw in the Atrium 4's for free. Fantastic. I was putting speakers on the deck anyway, so why not mount them by the grill to supplement the sound? It works great. I was not expecting much from these little speakers but I am super impressed. I get plenty of volume and crisp, clear audio. I was expecting the bass to be really anemic but it's pretty good for speakers of this size. The build quality is top notch and mounting them couldn't have been easier. Polk's Atrium series is a winner. Taking advantage of the Crutchfield/Polk offers is a no brainer.

    Pros: Great sound for such a small speaker. Very easy mounting.Good price point.

    Cons: None so far.

    Great sounding speakers

    Written By Kylek, Chicago on Wednesday, May 15, 2013

    Crutchfield Customer Review (What's this?)

    The speakers sound great even in a larger open space. The brackets allow you to mount them at the best angle for your setup, and can be mounted either vertically or horizontally with ease. The wire terminals make it so they make good contact for clear sound. Overall a great set of speakers for everyday use.


    Written By GaryD, Inverness, FL on Friday, May 10, 2013

    Crutchfield Customer Review (What's this?)

    I mounted the Polk Atrium 4 speakers on our lanai. They look and sound great. They were easy to mount and are more than adequate for that space. I may purchase two more for the garage.

    Pros: Ease of mounting and sound quality

    Cons: I don;t have any at this time.

    So far, disappointed

    Written By JohnB, St. Louis, MO on Sunday, April 28, 2013

    Crutchfield Customer Review (What's this?)

    Not enough bass to sound good in a small backyard. I cranked up the bass on the receiver, but got lots of nasty distortion when I gave them only a modest amount of volume. Should have spent the money to get something decent. Will see if the sound improves after they've acclimated to outside conditions but I'm not optimistic. Probably stuck with them as installation marred the white finish. Ugh.

    Pros: Compact design. Easy to install and great flexibility in how to direct sound. Look nice. Inexpensive.

    Cons: Not worth even the modest price if they can't handle bass.

    Polk Audio Atrium4

    Written By Lowell, Luling, La on Saturday, February 23, 2013

    Crutchfield Customer Review (What's this?)

    These speakers are great. right now I am pushing only 25 watts to them and the sound is unbelievable. Plan on buying a system with more power to push these babies.

    Good Sound

    Written By Mike, OKC, OK on Monday, February 04, 2013

    Crutchfield Customer Review (What's this?)

    These sound great outdoors, great clarity with no distortion at high volumes. Would buy these again.

    Polk Audio Atrium4

    Written By Anonymous, Orland Park, IL on Sunday, January 20, 2013

    Crutchfield Customer Review (What's this?)

    Look great and sound even better.

    Polk Audio Atrium4

    Written By Anonymous, Bakersfield, CA on Monday, October 15, 2012

    Crutchfield Customer Review (What's this?)

    Great product, great price, great service. What more could you ask for


    Written By Dust, Louisiana on Sunday, August 12, 2012

    Crutchfield Customer Review (What's this?)

    Easy mount and great....great....great sound....I'm not disappointed in anyway. I will be buying more Polk products in the near future.

    Pros: Great price and sound, also plays very loud for a little speaker.

    Cons: None

    Outdoor Pleasure

    Written By Dan C., Towmencin Twp, PA on Tuesday, June 12, 2012

    Crutchfield Customer Review (What's this?)

    Clean, clear sound quality. Fills your outdoor space with music that no boom box can match. These white waterproof speakers looks great and perform well. You find yourself spending more time outside. No regrets

    Pros: Compact, easily adjustable, good clarity. Quality from Polk you would expect

    Cons: Non yet.

    Great Speakers

    Written By KB, Santa Monica, CA on Monday, June 11, 2012

    Crutchfield Customer Review (What's this?)

    Extremely easy to install and so far sounds great for outdoor TV viewing.

    Polk Audio Atrium4

    Written By Anonymous, Craig, Colorado on Friday, May 18, 2012

    Crutchfield Customer Review (What's this?)

    Speakers are crystal clear, stereo has never sounded better. Just the right size to fit under the eves with room to adjust if necessary. Best birthday present ever.

    Pros: Ease with installation, crystal clear sign.

    Cons: Had to block with screen netting, Robins trying to nest on them.

    great speakers

    Written By Anonymous, yuma, az on Monday, April 02, 2012

    Crutchfield Customer Review (What's this?)

    outstanding sound....mounted them under the eaves around my pool. i didnt expect to get anywhere close to this rich of sound. very impressive!

    Pros: great sound. look great. easy to mount.

    Cons: none so far

    Polk Atrium Speakers

    Written By Satisfied Customer, Somerset County New Jersey on Friday, March 09, 2012

    Crutchfield Customer Review (What's this?)

    The Polk Atrium Speakers provide excellent sound and the quick disconnect brackets are very practical. Price was also very good.!

    Outdoor Speakers

    Written By JimmyC, Texas on Thursday, February 09, 2012

    Crutchfield Customer Review (What's this?)

    These speakers were a great value. I installed them myself, and they sound great. Great sound for a small speaker.

    Polk Audio Atrium4

    Written By Josh, Flora Illinois on Saturday, October 01, 2011

    Crutchfield Customer Review (What's this?)

    I trusted Axel with my choice and was not let down. Don't let the size of these speakers fool you. They fill my back yard with great sound. Bass is impressive for the size and vocals are clear. Great sounding speaker. Thanks again for a great product.

    Outdoor Speakers

    Written By GeorgeE, Dublin, GA on Tuesday, September 27, 2011

    My recent purchase of Polk outdoor speakers was a replacement for older Polk speakers I have had for over 10 years. I have to say the the quality that Polk builds into their products translates into great sound and longevity. My new speakers provide excellent sound reproduction in my outdoor pool/patio area. I would recommend Polk products to everyone!!

    Very Good Outdoor Speaker

    Written By TC, Shorewood, IL on Tuesday, August 23, 2011

    Crutchfield Customer Review (What's this?)

    I installed these speakers on an outside wall, just beneath the eaves. Due to their size, I was able to install them exactly where I wanted. The supplied bracket with swivel allowed me to rotate them where I needed the sound to go. Very good sound for their size and price. I would give 5 stars if they had a little more bass, but they did quite well for a 4" woofer.

    Small but great sound

    Written By Chris, Albany NY on Monday, August 22, 2011

    Crutchfield Customer Review (What's this?)

    Speakers are small but provide a nice sound. Surprised at the base that's output...I wasn't expecting a lot and they came out sounding nice. Fairly light weight so hanging them wasn't an issue with just some regular exterior screws.

    Worth the Money

    Written By BobF, Houston, TX on Monday, August 22, 2011

    Crutchfield Customer Review (What's this?)

    I put these speakers in the garage so when I did my wood working I had something to listen to. The set up was easy and after I dialed in the sound the speakers were very nice. They have good highs and lows. For the price they are an excellent buy!

    Polk Atrium 4

    Written By Jeff, Batesville Ar on Wednesday, August 10, 2011

    Crutchfield Customer Review (What's this?)

    Just want to start by saying the Atrium 4 is a good speaker for the money . I bought these speakers for my outdoor work area of my shop whitch is a 18x30 area it is covered and a 10 foot overhead the speakers have decent bass and great mids and highs. im looking to bay anougther set for my deak. would highly recomend.

    Excellent Speaker

    Written By Mario, Puerto Rico on Tuesday, July 26, 2011

    I always use Bose speakers, but bose has many issues at low frecuencies. When I finish the Atrium 4 Installation I'm listen a new sound, more rich, more bass, a really excellent sound from those little speakers. We hightly recomend the natural sound of this model.

    Polk Audio Atrium4

    Written By jb, mobile, al on Tuesday, June 28, 2011

    Crutchfield Customer Review (What's this?)

    part of an indoor surround system i value-engineered using all polk products. needed the surround speakers to all be white. used a pair of atrium5 in front, atrium4 in rear and one blackstoneTL2 for the center...with the polk special, all of it was less than $500! looks and sounds like a lot more...crutchfield/artie was a great help...

    Polk Audio Atrium4

    Written By KevinM, Bowling Green, KY on Saturday, May 28, 2011

    Crutchfield Customer Review (What's this?)

    I bought these to replace some old JBLs in my 15' x 15' enclosed patio. Excellent mounting hardware to find the perfect angles that I needed. Decent bass (which I can adjust easily on my receiver) and excellent mids and highs. I would recommend them. I was also very pleased with Crutchfield's product info and really fast delivery.

    Polk Audio Atrium4

    Written By Kevin, Ruston, LA on Monday, May 02, 2011

    I really like these speakers! They look good, and are not too big. I use them outdoors, and am really impressed with the sound! They have great bass for their size! The closer you put them to your eves, the more bass you will hear. I was also impressed with how well they "spread" the sound. I also like the fact that they are so weather proof. For the money, you can not beat them! Highly recommended!

    Great Outdoor Speakers

    Written By Russ, Plymouth, MI on Monday, May 02, 2011

    Crutchfield Customer Review (What's this?)

    These speakers do not handle as low of frequencies as I would want for indoor
    speakers, but the mids to highs are wonderful. The light amount of bass is
    perfect for my small backyard so that I do not disturb my neighbors. Also, the
    mounting brackets allowed for me to easily mount these speakers under my eaves
    and point them down towards the center of the patio.

    As always, Crutchfield delivered the speakers quickly and provided an extensive
    amount of additional support.

    polk outdoors

    Written By spin1, milw. wi. on Saturday, February 12, 2011

    Crutchfield Customer Review (What's this?)

    set these up in my work out room above the treadmill. they are working out just fine plenty of high end.i needed more bass so i added a polk psw111 sub cranks now!!! i also added an in wall volume control so i adjust them when needed if i flip over to the tv mode. nice speakers for the price.

    Polk Audio Atrium4

    Written By Cary, Alma Michigan on Friday, September 10, 2010

    Crutchfield Customer Review (What's this?)

    These speakers are a great price for their overall performance, I am very happy with them
    and would most certainly buy them again

    Hands-on research

    What's in the box?

    Download owner's manual

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

    Features and Specs

    Enclosure Acoustic Suspension
    Tweeter Type 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

    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.

    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.


    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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  • a 5" woofer
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  • handles up to 100 watts