---
product_id: 1148871
title: "Atrium 4 Weatherproof Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System"
brand: "polk audio"
price: "VT107521"
currency: VUV
in_stock: true
reviews_count: 13
category: "Polk Audio"
url: https://www.desertcart.vu/products/1148871-atrium-4-weatherproof-outdoor-speakers-with-powerful-bass-pair-black
store_origin: VU
region: Vanuatu
---

# 80W max output power One-click Speed-Lock mounting Waterproof & all-weather certified Atrium 4 Weatherproof Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System

**Brand:** polk audio
**Price:** VT107521
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate your outdoor vibe with Polk Atrium 4 — sound that’s as unstoppable as you are!

## Quick Answers

- **What is this?** Atrium 4 Weatherproof Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System by polk audio
- **How much does it cost?** VT107521 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/1148871-atrium-4-weatherproof-outdoor-speakers-with-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

- • **Compact Yet Mighty:** Sleek 4.5” woofer and aluminum dome tweeter deliver deep bass and crisp highs without bulk.
- • **Powerful 80W Output:** Fill your outdoor space with rich, clear sound that commands attention.
- • **All-Weather Durability:** Built to brave rain, snow, and sun—your soundtrack never stops.
- • **Universal Compatibility:** Gold-plated 5-way binding posts connect seamlessly to any modern AVR or amplifier.
- • **Effortless Speed-Lock Mounting:** Install in seconds with a secure, anti-slip bracket—no extra hands needed.

## Overview

The Polk Audio Atrium 4 Weatherproof Outdoor Speakers deliver premium 80W high-fidelity sound with deep bass and crisp highs, engineered for small to medium outdoor spaces. Featuring rugged all-weather certification, rustproof materials, and a patented Speed-Lock mounting system, these compact 4.5-inch speakers ensure effortless installation and year-round durability. Compatible with any modern amplifier, they transform patios, decks, and backyards into immersive audio experiences with professional-grade clarity.

## 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: Happy with my purchase - 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.
Review: Buy the good stuff the first time - 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

## 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 | #1,402 in Electronics ( See Top 100 in Electronics ) #6 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 6,006 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 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 Weatherproof Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System - Image 1](https://m.media-amazon.com/images/I/71KgV5mMghL.jpg)
![Atrium 4 Weatherproof Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System - Image 2](https://m.media-amazon.com/images/I/41MoU6dsbtL.jpg)
![Atrium 4 Weatherproof Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System - Image 3](https://m.media-amazon.com/images/I/61ZYDtjnLhL.jpg)
![Atrium 4 Weatherproof Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System - Image 4](https://m.media-amazon.com/images/I/51g8hPxq0NL.jpg)
![Atrium 4 Weatherproof Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System - Image 5](https://m.media-amazon.com/images/I/71TrQ6oQfSL.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

### ⭐⭐⭐⭐⭐ Happy with my purchase
*by W***E on March 11, 2026*

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.

### ⭐⭐⭐⭐⭐ Buy the good stuff the first time
*by M***D on March 19, 2026*

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

### ⭐⭐⭐⭐⭐ 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!

## Frequently Bought Together

- Polk Audio Atrium 4 Outdoor Speakers with Powerful Bass (Pair, Black), All-Weather Durability, Broad Sound Coverage, Speed-Lock Mounting System
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- 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 Vanuatu*
*Store origin: VU*
*Last updated: 2026-06-06*