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Polk Audio

Polk Audio Atrium 4 Outdoor Speakers, Powerful Bass (Pair, Black)

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Availability: Only 2 left in stock, order soon!
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Arrives Wednesday, Sep 2
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Color: Black


Size: 2 Speakers


Style: Atrium 4


Features

  • EASY INSTALLATION - One-click speed-lock mounting bracket offers anti-slip, one-handed installation. Mount these outdoor speakers wired vertically or horizontally to deliver optimal sound in different setups
  • EASY SETUP - Polk outdoor speakers gold plated 5-way binding post can easily connect to any modern AVR or amplifier
  • ALL WEATHER CERTIFICATION - Rugged durability and premium build make these Outdoor Movie Speakers ready for every season, effortlessly withstanding extreme temperatures, heavy rain, and all elements
  • EXCEPTIONALLY GREAT SOUND - High fidelity sound for small-to-medium outdoor areas. These Atrium Polk Audio Outdoor Speakers can be installed anywhere open by pool, on a patio, inside sunroom, or across the backyard
  • ULTRA COMPACT - Compact outdoor loudspeaker for Wall Mount Speakers with a 4.5 dynamic balance polypropylene woofer, 34 anodized aluminum dome tweeter

Description

The compact Atrium 4 outdoor outdoor wired speakers produce high-fidelity sound quality anywhere you want great sound. The small size of the powered speakers makes it ideal for tight, out-of-the-way installations. With an aluminum dome tweeter and polypropylene cone driver in each speaker, enjoy deep, accurate bass and smoother response. Polk’s patented Dynamic Balance and Klippel Optimization technologies ensure perfect material performance, eliminating driver and tweeter “artifacts” for more realistic sound reproduction at high and low volume levels. The weatherproof outside speakers feature a rustproof aluminum grille, rustproof aluminum bracket, and stainless steel/brass hardware that can endure seasonal change and deliver indoor speaker-quality audio for years of outdoor listening enjoyment. Quick and easy to install with Polk’s Speed Lock Mounting system.

Brand: Polk Audio


Speaker Maximum Output Power: 80 watts


Frequency Response: 25 KHz


Connectivity Technology: Ethernet


Audio Output Mode: Surround


Audio Output Mode: Surround


Mounting Type: Wall Mount


Enclosure Material: Metal, Plastic


Speaker Type: Outdoor


Additional Features: Bass Boost, Waterproof


Antenna Location: For Indoor Use, For Outdoor Use, For Surround Sound Systems


Subwoofer Diameter: 4.25 inches


Color: Black


Is Waterproof: TRUE


Warranty Type: Limited


Control Method: Voice


Speaker Size: 4.5 inches


Woofer Diameter: 4.5 inches


Water Resistance Level: Waterproof


Specific Uses For Product: Outdoor Use


Controller Type: Corded Electric


Frequency Response: 25 KHz


Number of Audio Channels: 2


Impedance: 8 ohm


Signal-to-Noise Ratio: 89 db


Connectivity Technology: Ethernet


Wireless Technology: No Wireless Communication Technology


Subwoofer Connectivity Technology: Wired


Connectivity Protocol: RCA, XLR, Coaxial, HDMI, USB


Audio Driver Type: Dynamic Driver


Number Of Circuits: 1


Brand: Polk Audio


Model Number: AM4085-A|4


Model Name: Atrium 4


Built-In Media: 2 Black all-weather speakers, 2 Mounting brackets (installed), Owner's Manual, Online Product Registration card, Polk Audio brochure


Warranty Description: 2 years parts and labor


Number of Items: 2


Customer Package Type: Standard Packaging


Series Number:


UPC: 747192118792


Global Trade Identification Number: 92


Manufacturer: DEI Holdings


Speaker Maximum Output Power: 80 watts


Unit Count: 2 Count


Item Dimensions D x W x H: 6.69"D x 5.69"W x 8.63"H


Item Weight: 3.6 pounds


Compatible Devices: Desktop, Laptop, Television


Compatible with Vehicle Type: Car


Power Source: Corded Electric


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Sep 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Most importantly—- installing these was a breeze and the sound is amazing
Color: White Size: 2 Speakers Style: Atrium 4
We installed these on our covered back porch —love them!! Installation was a breeze and the sound quality is amazing. These are great -order them if you are looking for outdoor speakers
Reviewed in the United States on July 14, 2026 by Amber Ellison
    • Works well
Color: Black Size: 2 Speakers Style: Atrium 4
Good product and well made .
Reviewed in the United States on July 29, 2026 by Joseph Bertino
    • Full, rich and balanced sound from a relatively small speaker!
Color: White Size: 2 Speakers Style: Atrium 4
At their price point, these speakers represent the absolute best value you will find, period. I was in the market for some outdoor speakers to go with a 100 inch projector screen for my terrace. I've been a user of Polk Audio for many years, in fact, my home theater is comprised of polk audio tsi's except for the main speakers which are Bowers and Wilkins. Long story short I'm a fan of more "relaxed" speakers that let you enjoy the sound for longer periods of time without any ear fatigue. Once I decided that a 4 1/2 inch cone would suffice (I'm not trying to start a war with my neighbors here) I pulled the trigger on these. I could not be more happier with my purchase. Paired with my old trusty Denon Receiver in Zone 2, and without any EQ or any crossover for that matter, these speakers have proved themselves to be an absolute bargain. Speaker imaging is spot on with plenty of detail and separation for a nice, ample and defined sound stage that makes the speakers virtually invisible. Contrary to what many have stated, I have found the bass response on these to be more than enough considering their size and the acoustic properties of my terrace (they are mounted to a concrete wall and the area is roofed). You can clearly define all the highs and lows and since its a Polk those tweeters wont be overly aggressive , the only thing you will not get is the earth shattering base that you can achieve by adding a sub to the mix. The speakers can easily fill all my terrace and pool area (40' x 35') with sound without actually having to be loud. Another area where I was pleasantly surprised was with their performance in movies, voices, music and special effects all shine through effortlessly at any volume and yes, they can get VERY loud if you want to push them. So that's that, if your in the market for outdoor speakers I would not hesitate to check these out as long as you provide adequate power with a dedicated amp or receiver you should be good to go. Give them a proper break in and enjoy! ... show more
Reviewed in the United States on January 26, 2019 by Nino
    • Pleased overall
Color: Black Size: 2 Speakers Style: Atrium 4
For $100 these are some pretty good overall outdoor speakers. I had a pair of JBL outdoors that developed some buzzing and pops so I needed a replacement and I went with these. For reference, every other speaker I own (except for a pair in the garage) is JBL, this was my first Polk experience. Generally speaking they are a solid set of speakers. They give a pretty balanced sound all around but lack a little fullness in the lower mid-range. This is particularly noticeable when playing orchestral type music like film scores or piano heavy music. Going from the lower mids to bass is where they really start to have trouble. For the size of the speaker I certainly wasn't expecting to really "feel" bass but these do drop off noticeably in the lower frequency ranges. If there's something to knock with the Atrium 4's, that's it. With other types of music (country, rock, etc...) those issues aren't as noticeable. With that said they offer a nice high end treble sound that is pleasing to the ear. Overall the tone is brighter than I generally prefer (all of my JBL's have a warmer tone) but it certainly isn't a deal breaker for me. They don't by any stretch of the imagination sound unpleasant. For our purposes, general entertaining...using them for music outside while we do yard work..., they fit the bill very nicely. For $100 I am overall satisfied with this purchase. If you can afford to, or if a flatter overall response is important, then I'd probably look at something a little more expensive. If you are comfortable giving up some sound quality or if budget is an issue then certainly gives these a serious look. Installing these babies was an absolute breeze. The mounting hardware supplied by Polk is virtually idiot proof. It simply could not be any easier to mount these speakers. The installation deserves 5 stars. The fact that they are virtually weatherproof is also a plus, you can mount them just about anywhere without fear of damage from the elements. One other thing I really liked was the ability to swivel and aim the speakers to exactly where I wanted them (this could not be done with our JBL's these replaced). Power handling has not been an issue for me. I've got them hooked up to a 120 watt receiver and they been flawless to this point even at high volumes. We have a relatively large back yard so it takes some juice to disperse the sound and the Atriums are more than capable of taking it. I'll summarize this way; if you're looking for an inexpensive way to get good quality sound outdoors with something that is ridiculously easy to install then the Atrium 4 deserves strong consideration. If you can afford to get in to an upgraded version then I would probably look in that direction solely for a better bass-lower midrange performance. ... show more
Reviewed in the United States on June 8, 2012 by Jason
    • Updated review March 2021
Color: White Size: 2 Speakers Style: Atrium 4
Awesome speakers!!! The sound is super clear and they have great bass for the size as well.......they don't have the super deep bass like an active subwoofer. ....but hey, they're smaller speakers. Perfect for the patio or deck! Not too big and bulky but big enough to sound great!! Quality appears great and you can't beat the mounting system!! Super easy to mount in a variety of positions......and the speaker slips into bracket and stays in place so your hands are free to put the cap screws on the ends and hook the wires up!! The engineers actually did a great job with this system! We mounted them under the soffit on the house above the back deck and they're wired into an older Pioneer receiver with an equalizer. It gets -30f here so we will be removing them for winter just to be safe. At under $100 I don't think you will be able to find better bang for the buck anywhere. Highly recommend!! Update*#*#*11/17 Just finished installing two more pair of these in garage. Wow. What a difference these make in the quality of sound......full sound and very clear. Had a full set of samsung speaker that came with surround system out there. Put these in tonight and all I can say is wow!! What a difference! Will be ordering some more to install near our firepit in back yard. ****update March 2021**** These speakers are still going strong!! Have had hundreds of hours of use and they still sound as good as the first day of use. No problems with the weather at all, had to dust them off last fall, (excess dust in neighborhood from road work over the summer). Still would recommend these 100%!! ... show more
Reviewed in the United States on August 11, 2017 by Dan S.
    • Happy with my purchase
Color: White Size: 2 Speakers Style: Atrium 4
Review Image by Wayne
I am happy with these speakers. They have a decent range from high to low, a clear sound and will get loud enough to annoy the neighbors. They were easy to install and I like they way they look on my back porch.
Reviewed in the United States on March 11, 2026 by Wayne
    • Awesome outdoor speakers!
Color: Black Size: 2 Speakers Style: Atrium 4
I purchased two pairs to bring my large wrap around deck to full sounding glory. I am an audio engineer, so I am expecting a lot from them (at a cheap price). I must say that I am very happy. Of course, a lot of the sound itself is dictated by the amplifier in which you use, where you mount the speakers, and much more. For me, these are perfection. I also purchased a pair of the competing Kicker outdoor speakers. I found that between the 2 pairs of Polks, and the 1 pair of Kicker's - I the Polk have a beautiful clarity that I'm enjoying. No, they are not super bass heavy (no speaker of this size could really reach down to 20hz anyway) but they do have a well balanced range in which I find very pleasing to my tuned ears. In comparison to the Kicker's - I'd say the Polk's have 1 notch up. The Kicker's have more bass, but not as much clarity and definition as the Polk. I'm giving this 5 stars because: The price is fantastic. The sound quality is satisfying and well balanced. The speakers really do project nicely, and the build quality is quite good. I can now drown out the neighbors with ease! haha.. Bottom line is: if you need a good pair of outdoor speakers for a sweet price - these are likely the perfect match well worth considering. ... show more
Reviewed in the United States on September 5, 2019 by Amazon Customer
    • Buy the good stuff the first time
Color: White Size: 2 Speakers Style: Atrium 4
Selected Polk outdoor speaker after returning less expensive speakers. What a difference the Polk atrium 4 speakers made. Sound quality is fantastic. Install was a breeze. I would highly recommend these speakers. I was very happy with the purchase and so will you. Moral of the story: you get the quality you pay for ... show more
Reviewed in the United States on March 19, 2026 by medeirosland

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