---
product_id: 1148871
title: "Atrium 4 Outdoor Speakers, Powerful Bass (Pair, Black)"
brand: "polk audio"
price: "$503.45"
currency: USD
in_stock: true
reviews_count: 13
category: "Polk Audio"
url: https://www.desertcart.us/products/1148871-atrium-4-outdoor-speakers-powerful-bass-pair-black
store_origin: US
region: United States of America
---

# 80W max output power All-weather waterproof design One-click Speed-Lock mounting Atrium 4 Outdoor Speakers, Powerful Bass (Pair, Black)

**Brand:** polk audio
**Price:** $503.45
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate your outdoor vibe with Polk’s powerhouse sound—because your backyard deserves the best!

## Quick Answers

- **What is this?** Atrium 4 Outdoor Speakers, Powerful Bass (Pair, Black) by polk audio
- **How much does it cost?** $503.45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/1148871-atrium-4-outdoor-speakers-powerful-bass-pair-black)

## Best For

- polk audio enthusiasts

## Why This Product

- Trusted polk audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Placement:** Mount vertically or horizontally to optimize sound coverage anywhere from patios to poolside.
- • **Compact Yet Powerful:** 4.5” woofer and anodized aluminum tweeter pack a punch without taking up space.
- • **Rich, Balanced Sound:** Dynamic Balance tech delivers deep bass and crystal-clear highs for immersive outdoor audio.
- • **Weatherproof Durability:** Built to brave rain, heat, and cold with rustproof aluminum and stainless steel hardware.
- • **Effortless Setup & Mounting:** One-click Speed-Lock bracket for quick, secure installation—no hassle, just pure sound.

## Overview

Polk Audio Atrium 4 outdoor speakers combine rugged, waterproof construction with high-fidelity 80W sound output. Featuring a compact 4.5-inch woofer and aluminum dome tweeter, these speakers deliver rich, balanced audio with deep bass and clear highs. The innovative Speed-Lock mounting system ensures quick, secure installation, while all-weather certification guarantees durability through every season. Perfect for patios, pools, and terraces, they bring premium indoor-quality sound to your outdoor spaces.

## 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.

Review: Most importantly—- installing these was a breeze and the sound is amazing - 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
Review: Full, rich and balanced sound from a relatively small speaker! - 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!

## 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 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00378KMF0 |
| Additional Features | Bass Boost, Waterproof |
| Antenna Location | For Indoor Use, For Outdoor Use, For Surround Sound Systems |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Surround |
| Best Sellers Rank | #1,731 in Electronics ( See Top 100 in Electronics ) #4 in Outdoor Speakers |
| Brand | Polk Audio |
| Built-In Media | 2 Black all-weather speakers, 2 Mounting brackets (installed), Owner's Manual, Online Product Registration card, Polk Audio brochure |
| Color | Black |
| Compatible Devices | Desktop, Laptop, Television |
| Compatible with Vehicle Type | Car |
| Connectivity Protocol | RCA, XLR, Coaxial, HDMI, USB |
| Connectivity Technology | Ethernet |
| Control Method | Voice |
| Controller Type | Corded Electric |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 4.6 out of 5 stars 6,026 Reviews |
| Enclosure Material | Metal, Plastic |
| Frequency Response | 25 KHz |
| Global Trade Identification Number | 00747192118792 |
| Impedance | 8 Ohms |
| Is Waterproof | TRUE |
| Item Dimensions D x W x H | 6.69"D x 5.69"W x 8.63"H |
| Item Weight | 3.6 Pounds |
| MP3 player | No |
| Manufacturer | DEI Holdings |
| Model Name | Atrium 4 |
| Model Number | AM4085-A|4 |
| Mounting Type | Wall Mount |
| Number Of Circuits | 1 |
| Number of Audio Channels | 2.0 |
| Number of Items | 2 |
| Power Source | Corded Electric |
| Series Number | 747192118792 |
| Signal-to-Noise Ratio | 89 dB |
| Speaker Maximum Output Power | 80 Watts |
| Speaker Size | 4.5 Inches |
| Speaker Type | Outdoor |
| Specific Uses For Product | Outdoor Use |
| Subwoofer Connectivity Technology | Wired |
| Subwoofer Diameter | 4.25 Inches |
| UPC | 747192118792 |
| Unit Count | 2.0 Count |
| Warranty Description | 2 years parts and labor |
| Warranty Type | Limited |
| Water Resistance Level | Waterproof |
| Wireless Technology | No Wireless Communication Technology |
| Woofer Diameter | 4.5 Inches |

## Product Details

- **Audio Output Mode:** Surround
- **Brand:** Polk Audio
- **Connectivity Technology:** Ethernet
- **Frequency Response:** 25 KHz
- **Speaker Maximum Output Power:** 80 Watts

## Images

![Atrium 4 Outdoor Speakers, Powerful Bass (Pair, Black) - Image 1](https://m.media-amazon.com/images/I/71KgV5mMghL.jpg)

## Available Options

This product comes in different **Color, Size, Style** options.

## Questions & Answers

**Q: We do not have a covered deck. Could these outdoor speakers be totally exposed to the outdoor element?**
A: I have installed these speakers totally exposed and they have lasted several years the grills might become rusty looking depending on the area you're in

**Q: Are these compatible with Alexa/Echo Dot?**
A: These are not Bluetooth speakers so they will not work directly with Echos or Dots and need to be powered by an audio receiver. You can however, use an RCA or Bluetooth connection between an Echo or Dot and the reciever and stream to the speakers.

**Q: Is it two packs of pairs being a total of 4 speakers?**
A: No the 4 is for the size and model, there is only 2 speakers in the box!
These are Great Speakers!!!

**Q: Is it easy to be operated? I hope it will be not too hard to do that...**
A: …Were very easy to set up, and I just connected to the amplifier and then to the record player.…You can buy this amplifier if you are a lack of it.https://www.amazon.com/Bluetooth-Amplifier-Receiver-Integrated-Audio/dp/B07L3F5QQ7

## Customer Reviews

### ⭐⭐⭐⭐⭐ Most importantly—- installing these was a breeze and the sound is amazing
*by A***N on July 14, 2026*

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

### ⭐⭐⭐⭐⭐ Full, rich and balanced sound from a relatively small speaker!
*by N***O on January 26, 2019*

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!

### ⭐⭐⭐⭐⭐ Updated review March 2021
*by D***. on August 11, 2017*

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%!!

## Frequently Bought Together

- Polk Audio Atrium 4 Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System
- Fosi Audio BT20A Bluetooth Stereo Amplifier, 2 Channel Home Audio Component Amplifiers for Passive Speakers, Mini Class D Amp Receiver 200W for Indoor/Outdoor/Garage/Ceiling/Bookshelf Speaker
- GearIT Outdoor Speaker Wire CCA 2x2.5mm≤ (60.96 Meters - Black) Copper Clad Aluminum - Hi-Fi Audio Cable for Direct Burial in Ground/in Wall / CL3 CL2 Rated / 2-Conductors - 14 Gauge AWG, 200 Feet

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-31*