Polk Audio

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

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$144.00$225.00

About this item

  • 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 speaker’s 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, ¾” anodized aluminum dome tweeter
$144.00
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Product details

BrandPolk Audio
Speaker Maximum Output Power80 Watts
Frequency Response25 KHz
Connectivity TechnologyEthernet
Audio Output ModeSurround

Technical specifications

mounting_typeWall Mount
materialPolypropylene, Aluminum, Plastic/Metal
model_nameAtrium 4
speaker_typeOutdoor
special_featureBass Boost, Waterproof
recommended_uses_for_productFor Indoor Use, For Outdoor Use, For Surround Sound Systems
compatible_devicesDesktop, Laptop, Television
subwoofer_diameter4.25 Inches
unit_count2.0 Count
surround_sound_channel_configuration2.0
colorBlack
included_components2 Black all-weather speakers, 2 Mounting brackets (installed), Owner's Manual, Online Product Registration card, Polk Audio brochure
product_dimensions6.69"D x 5.69"W x 8.63"H
item_weight3.6 pounds
impedance8 Ohms
is_waterproofTRUE
warranty_typeLimited
number_of_items2
control_methodVoice
speaker_size4.5 Inches
power_sourceCorded Electric
woofer_diameter4.5 Inches
water_resistance_levelWaterproof
customer_package_typeStandard Packaging
audio_driver_typeDynamic Driver
number_of_circuits1
series_number747192118792
upc747192118792
styleAtrium 4
global_trade_identification_number00747192118792
manufacturerDEI Holdings
item_model_numberAM4085-A|4
best_sellers_rank#2,936 in Electronics ( See Top 100 in Electronics ) #1 in Outdoor Speakers
is_discontinued_by_manufacturerNo
date_first_availableFebruary 1, 2010

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Customer reviews

4.69,841 ratings

Customers say

Customers find these outdoor speakers to be well-built, holding up to both sun and weather, with clear highs and mids and crisp voice clarity. Customers appreciate their sound quality and value for money, with one mentioning they're great for mid-volume use around the pool deck.

★★★★★

Polk Audio Never Disappoints – Amazing Outdoor Speakers! 🔊☀️

F. SealeyApril 4, 2025

I bought a **pair of Polk Audio Atrium 8 SDI speakers** for my **back patio expansion**, and they have been **nothing short of incredible**! The **beautiful design** blends seamlessly with my outdoor space, and they are built to withstand the elements. I paired these with a **SunFire amp**, and the **sound quality is simply awesome**—rich, clear, and powerful, even in an open outdoor environment. Mounting was **easy**, and the build quality feels **top-notch**, exactly what I expect from Polk Audio. I’ve been a **Polk Audio fan for almost 40 years**, and their **reputation for quality and durability** is well-earned. I still have an **older set in my garage that’s over 20 years old**, and they still sound fantastic—**which is exactly why I chose Polk again**! If you're looking for **high-quality outdoor speakers** that will last, these are a no-brainer. **Highly recommend!** 🎶🔥 Read more

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★★★★★

Nice size and sound quality for outdoor patio space

RobSeptember 1, 2022

I purchased these as replacements for outdoor speakers that were installed on a new-to-us house, but that were no longer working. I bought the white version, and they compliment our home's exterior trim color nicely. Installation was a breeze -- each speaker is bolted to the house with two wood bolts, then attach the wire, and that's all there is to it. In my case, I am using a dedicated "left" and "right" speaker setup, so I cannot address how well these work when they are wired with both left and right speaker wires. I can say that you need to slide the switch/contact cover over on the back of the speaker if you are wiring them as "left" or "right" like you would for normal speakers, or else the sound is quite a bit softer. This makes more sense when you look at the unit itself--but there are two ways to wire each speaker, so follow the directions for your application and you'll be fine. As you'd expect, there is not a ton of bass to these speakers, however when connected to a home-owner quality sound system (Sony), they sound quite good as an external speaker, and better than ones that we had at our previous house. I'm hopeful that I can get at least 5 solid years out of these speakers in order to justify the price. We'll see how that works out, but I think Polk quality is quite good for my purposes, and I have confidence that it has been money well spent. Read more

★★★★★

Great outdoor speaker.

CustomerSeptember 3, 2025

Speakers appear well made. I have only been using them for a short time, so long term durability is something I cannot comment on. However, for a compact speaker they sound great and put out a surprising amount of bass. I was able to drive them quite loud without break up or distortion. I also like that they are 8 ohms which makes them pretty standard and compatible with virtually any amplifier. Read more

★★★★★

Great sounding speakers

TerronautNovember 7, 2025

These Polk Atrium 6's really are a great sounding set of speakers. I embarked on setting up a "Zone 2" set of outdoor speakers on my back patio, which will eventually run off a spare Marantz AVR (SR5009) that I have in the garage, daisy-chained to a Marantz 8802 in my living room. I really wanted to take some time to compare some speakers before making a decision, and decided to try the Polk Atrium 6, Klipsch AW-650, and two speakers from OSD - the AP640 and AP650. I disconnected my beloved B&W CDM-6NT tower speakers and hooked each of the candidate speakers up to a great sounding Jolida tube amp with Denon CD player, running each of them through jazz, various rock, and country selections including Stan Getz, live Allman Brothers, Dave Brubeck, etc. I pretty much ruled out the OSD AP640 right away - they were very hollow and underwhelming for my taste. The AP650's were better (IMO), perhaps tighter (enclosed box) but still seemed to lack some bandwidth, and the low-end just wasn't doing it for me, although I realize these are small outdoor speakers and don't expect to shake any windows with them. Had I bought them by themselves, I probably would have liked them better but they just didn't stack up to the Klipsch or Polk's. I really liked the Klipsch AW-650's, but trying them side by side with the Polk's, my ears couldn't help but prefer the Atrium 6's. The Atrium 6's just did it for me - warm, crystal clear, neutral sound across the spectrum and surprisingly I like their lower frequency response over the Klipsch AW-650's, which have a larger driver in them. I ended up leaving the Polk Atrium 6's hooked up in my living room last night, switched them over to my Marantz AV-8802/Outlaw Audio 5000X (AVR & amp) system, and watched some programming on Netflix. Using the Atrium 6's as my Right/Left channels, they did well paired with my center channel and subwoofer, and this morning I'm still enjoying them immensely - they're back on the tube amp, and playing Miles Davis, Kind of Blue, in the other room while I type this. Horns and piano are remarkably clear from here (50' away), and string bass is very natural and enjoyable - I can hear it very clearly even with the amp running at low volume in the other room. As a side note, I passed on the Klipsch AW-650's but did like them - I think if I were placing speakers in a larger outdoor area, perhaps to send sound across a pool and larger patio area, I may have kept them instead. In the end I just really preferred the natural, intimate sound of the Polk Atrium 6's. If I had anything negative to say about the Polk's, it's nothing to do with sound but rather with what I see as a design oversight on the speaker connections themselves. If you prefer to use banana plugs, over the binding posts, be forewarned that there isn't a whole lot of room to plug them in - the speaker connections are recessed in the back of the speaker and even though they're angled slightly, there isn't much room between them and the speaker enclosure - I couldn't use my banana plugs to hook them up without feeling like I was going to bend or break something, so opted to use the binding posts instead. Not a deal breaker but seriously this should have been addressed in engineering. Nevertheless I HIGHLY recommend giving these a try - happy listening! Read more

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