Search  for anything...
Polk Audio

Polk Audio Atrium 4 Weatherproof Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System

  • Based on 9,815 reviews
Condition: New
Checking for the best price...
$249.00 Why this price?

Buy Now, Pay Later

As low as $41.50 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Apr 26
Order within 6 hours and 24 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Recently Viewed

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


Controller Type: Corded Electric


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


MP3 player: No


Specific Uses For Product: Outdoor Use


Frequency Response: 25 KHz


Number of Audio Channels: 2.0


Impedance: 8 Ohms


Signal-to-Noise Ratio: 89 dB


Compatible Devices: Desktop, Laptop, Television


Compatible with Vehicle Type: Car


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


Number of Items: 2


Customer Package Type: Standard Packaging


Series Number:


UPC: 747192118792


Global Trade Identification Number: 92


Manufacturer: DEI Holdings


Warranty Description: 2 years parts and labor


Speaker Maximum Output Power: 80 Watts


Unit Count: 2.0 Count


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


Item Weight: 3.6 Pounds


Connectivity Technology: Ethernet


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


Power Source: Corded Electric


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Apr 26

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • 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
    • 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
    • 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
    • Decent speakers for the price
Color: White Size: 2 Speakers Style: Atrium 4
For years I had Bose speakers on my sailboat but they are now so expensive. I got these and they are holding up well so far and sound good
Reviewed in the United States on December 8, 2025 by Fly_Sail
    • Very good quality speakers
Color: Black Size: 2 Speakers Style: Atrium 4
Review Image by Megan pizzitola
Review Image by Megan pizzitola
The media could not be loaded. We build an outdoor patio this year. After a ton of research, we decided that speakers like these are better quality than the circle ones that go into the ceiling. We are on 2 acres. These speakers can be heard on our whole property very well. We are more than pleased. We ordered 4. ... show more
Reviewed in the United States on February 7, 2026 by Megan pizzitola

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...