Polk Audio
Polk Audio Atrium4 Outdoor Loudspeaker
Best compact speakers for high-fidelity backyard audio setups.
Elevate your outdoor audio with the Polk Audio Atrium4 loudspeakers. These compact, all-weather certified speakers deliver high-fidelity sound, perfect for any outdoor setting. Featuring a 4.5-inch woofer and aluminum tweeter with Dynamic Balance technology, they produce realistic sound reproduction. The included 180° Speed-Lock mounting system allows for effortless aiming and secure installation, making them ideal for tight, out-of-the-way placements. Enjoy durable performance and versatile placement options for your ideal outdoor listening experience.
$199.00
Owner Satisfaction
4.6
/ 5
Category Rank
1855
/ 6561
#1855 in Speakers
Price vs Category Average
-86%
Below average
Impedance
8
/ ohms
Who it's for
- DIY installers seeking a quick and flexible mounting process
- Homeowners living in harsh or unpredictable climates
- Listeners prioritizing vocal clarity for background music
Who should skip it
- Audiophiles craving deep, impactful bass for their music
- Hosts needing high-volume sound for large outdoor gatherings
- Design-conscious buyers wanting discreet or modern aesthetics
Performance breakdown
Weather Resistance
All-weather certification ensures reliable performance through rain, snow, and extreme heat.
Installation Versatility
Speed-Lock mounting system makes positioning simple in tight or awkward spaces.
Sound Fidelity
Dynamic Balance technology delivers crisp, realistic audio for open-air environments.
Form Factor
Compact footprint allows for discreet placement without sacrificing significant acoustic output.
Build Durability
Rugged construction and gold-plated posts provide long-term protection against environmental corrosion.
Amplification Efficiency
Broad power range makes these speakers compatible with most standard home receivers.
Key Specs
Impedance
8 ohms
Sensitivity
89 dB (1 watt @ 1 meter)
Frequency Response
75 Hz - 25 kHz
Recommended Amplifier Power Per Channel
10 watts - 80 watts
Woofer
4.5 inches Polymer-Cone
Tweeter
Aluminum
Dimensions
8.63" H x 5.69" W x 6.68" D
Weight
3.6 lbs
Features
- All-weather certified for outdoor use
- Compact size for versatile placement
- Easy aiming with Speed-Lock mounting
- Realistic sound with Dynamic Balance
- Durable polymer woofer and aluminum tweeter
- Designed for horizontal or vertical orientation
- Secure connections with gold-plated posts
What customers say
The Polk Audio Atrium4 speakers are highly praised for their exceptional value and impressive sound quality, especially considering their compact size and affordable price. They deliver clear mid and high frequencies with surprising volume for outdoor spaces, maintaining a satisfying sonic balance for casual listening. Users also highlight the robust all weather durability, ensuring long term performance against the elements. The easy to use mounting system simplifies installation, enhancing the overall user experience. These speakers are consistently recognized as a top choice for reliable outdoor audio.
Know before you buy
Yes, the Atrium4 speakers are all-weather certified and designed to withstand harsh environmental conditions. They are built with durable materials that resist moisture and temperature fluctuations, making them suitable for permanent outdoor installation.
These speakers are compatible with any standard home audio amplifier or receiver that provides between 10 and 80 watts of power per channel. Since they have an 8-ohm impedance, they will work easily with most mainstream audio equipment.
You can mount them in either orientation. The Speed-Lock mounting system is designed to be flexible, allowing you to secure the speakers horizontally or vertically depending on your space requirements.
The Atrium4 speakers are fully waterproof, meaning they are engineered to handle direct exposure to rain and high humidity. However, they should not be submerged in water.
Installation is straightforward thanks to the included 180° Speed-Lock mounting system. You simply mount the bracket to the wall, click the speaker into place, and tighten the knob to lock in your preferred angle.
You will need standard two-conductor speaker wire to connect these to your amplifier. The speakers feature gold-plated binding posts, which provide a secure, corrosion-resistant connection for your wire.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$199