Polk Audio Atrium 4 Outdoor Speakers

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What better way to enjoy being outside than by listening to music? It completely sets the scene—a patio barbecue, a romantic candlelit terrace dinner, a summer pool party, days spent in the sunroom or a special backyard birthday dinner with some beats to tap your feet to.

Are you a music lover looking to jam to some tunes in the great outdoors? If you’re searching for a set of outdoor speakers so you can pump up that bass, you’ve come to the right place. We’re reviewing Polk’s outdoor speakers which should be considered for your shopping list.

Polk Audio Atrium 4 Outdoor Speakers with Powerful Bass


These outdoor speakers were specifically made for outside use. They exceed standard industrial and military specifications for environmental resistance. They’re all weather certified and can tolerate extreme temperatures and heavy rain.

Known as the speakers for all seasons, they boast sturdiness and excellent quality. These speakers can be installed in any open area. Their function? To produce high fidelity and exceptionally abundant sound outdoors.

Introduced around 2002 and first listed on Amazon in 2005, it’s part of the Polk Atrium Indoor-Outdoor Speakers series. Followed by models Atrium 5, 6 and 8-SDI, it’s made by one of the most renowned international audio manufacturers.

The Atrium is Polk’s leading series of conventional indoor-outdoor speakers. Even after all these years, it’s still one of the successful and highly user rated speaker series available.

Who is this product for?

If you’re a music and sound lover, these outdoor speakers are for you. They’re easy to install and neither big nor bulky, plus they can be mounted in a variety of positions. Ideal for your balcony, deck or yard, you can enjoy many hours outdoors in the company of your favorite tunes. It comes at an affordable price for a set of speakers of this size. But if you’re looking for a deeper bass like an active subwoofer, you’ll probably be disappointed. You can easily fix this though by adding your own sub.

What’s included?

You’ll receive a set of two speakers with mounting brackets. Screws aren’t provided and this product doesn’t include audio inputs or a built-in amplifier. You’ll need to connect the speaker to your own amplifier or stereo system.

A user manual including installation guidelines as well as mounting instructions with helpful safety tips is included. Don’t forget to register your product upon assembly. Watch this unboxing video to see what you’d get in the package.

Overview of features

These outdoor speakers are available in black and white. This pair can be installed in either horizontal or vertical orientations. With dimensions of 8.625” x 5.688” x 6.688”, they weigh 3.6 lbs.

The ‘4’ in this product’s name means it has a 4.5” long throw mineral filled polypropylene cone front array driver. It has a .75” anodized aluminum dome tweeter with butyl rubber surround. The neodymium magnet assists with improved power control and a smoother response. Although the speakers are small, the compact design produces large volumes of broad sound distribution.

The patented Dynamic Balance® ensures authentic sound at both low and high levels. The result? Impressive audio quality with a total frequency response between 75-25Hz and a sensitivity of 89 dB. The recommended amplifier power per channel is 10–80W.

These powerful speakers cut through loud, vibrating background noises and offer you quality sound. Critical mid and high frequency distribution’s maximized over a vast area without compromising on detail.

The steeply angled baffled design allows full range audio to flow into open spaces. Including speaker inputs of a pair of five gold plated binding posts ensuring secure, reliable hookups, this product’s been recognized as one of the best looking outdoor speakers.

The outer profile easily blends into the corners of outdoor walls so the speakers can be tucked away out of sight. The added benefit? The aluminum bracket and grilles, brass and stainless steel guarantee no rust.

While these aren’t Bluetooth speakers, they can easily be connected to your amplifier or stereo system. The product comes with a 5-year cabinet and drivers warranty.


Installation of these outdoor speakers is easier than you think. Choose between vertical or horizontal mounting orientation for the best position for maximum sound delivery.

With a simplest, quick and safe mounting system, mount the swiveling C bracket onto your ceiling or wall and click the speaker into place. The one-click speed lock mounting bracket provides simple anti-slip single handed installation. Then, simply aim and tighten it down and you’re good to go. 


  • All-weather durability
  • Compact size
  • 180° speed lock mounting system
  • Reasonable price
  • Solid, sturdy bracket


  • Screws not included


Polk Audio Atrium 8 SDI Flagship Outdoor All Weather Speaker.


If you’re looking for a speaker set offering a better base sound, consider the Polk Audio Atrium 8 SDI Flagship Outdoor All Weather Speaker. It’s a good alternative providing fuller sound.

Polk Audio Atrium SUB 100


If you still want a deeper base sound, perhaps invest in a sub-woofer such as the Polk Audio Atrium SUB 100. Make sure you use it with at least a 100W amp for effective bass.


If you’re planning your next evening of entertaining guests, or want to revamp your outdoor area, be sure to get a set of Polk Audio Atrium 4 Outdoor Speakers. With the diverse offerings, you’re one step closer to spending more time outdoors accompanied by the sound of music in out in the fresh air. 

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