Atrium 8 SDI

Name: Atrium 8 SDI
Brand: Polk Audio
SKU: 112675-01-00-001
Price: 299.00 USD
Availability: InStock

High-Performance Outdoor Speaker with 6.5" Driver

$299 / each

Flagship all weather loudspeaker with single/dual input switch and dual tweeter array that lets you work the speaker as a single high/performance stereo loudspeaker, or L/R speaker in a high-performance stereo pair. It’s time to get that indoor sound you love - all from an outdoor loudspeaker you can put anywhere around your home.

Engineered and designed in USA
Great sound for every room
5 years warranty
Built to last

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Atrium 8 SDI

$299 / each

PowerPort® Bass Venting

You’ll experience space-filling sound in any outdoor area, porch, sunroom, or deck. Polk’s patented water-resistant PowerPort® efficiently adds 3dB of big, realistic, musical bass output. And when combined with its anodized aluminum tweeter domes, this speaker not only delivers powerful, high-quality sound output, but excellent midrange clarity.

"I bought these 6 months ago and they have been great speakers for my outside area!"

– DJ C., Verified Buyer

"I had the same pair on my back porch for 5 years. Repainted my whole outside of my house. Wanted a new/clean pair of these Speakers for my porch. I love these speakers !"

– Quality P., Verified Buyer

"If you are looking for a pair of speakers that you can mount out of the way that put out an excellent sound for the money, get these. You cant go wrong."

– Top K., Verified Buyer

"Absolutely the best outdoor speakers I’ve ever heard. I had the 4’s but upgraded. They were nice but these are amazing. Worth every penny and then some."

– M G., Verified Buyer

"Speakers sound great. I found they really come to life the louder they get."

– Jam D., Verified Buyer

Great outdoor sound

Patented Dynamic Balance®

Whether you’re lounging in your favorite chair, hosting a BBQ, or spending time with the family outdoors, you won’t miss a single word of your favorite tunes. The Atrium Series outdoor speakers deliver crisp, powerful vocals—without distortion. Their Patented Dynamic Balance® and Klippel Optimization Technologies ensure optimal material performance, eliminating driver and tweeter “artifacts” for more realistic sound reproduction at high and low volume levels.

Polk All-Weather Certified

Made to withstand the elements, these speakers are built to last and produce rich, lifelike, space-filling sound—no matter the weather. Atrium Series speakers exceed baseline industrial and military specifications for environmental endurance (ASTM D5894-UV Salt Fog, Mil Standard 810 Immersion, Mil-Std 883 Method 1009.8 for salt and corrosion).

Speed-Lock™ Mounting System

Sprucing up the patio or backyard is a cinch with easy, secure one-handed installations even in difficult locations. The Speed-Lock Mounting System ensures easy, safe one-handed installations and no-slip setting of the speaker angle. This greatly simplified mounting procedure means fewer parts and a quicker setup.

The Atrium speaker family

For the ultimate outdoor sound system, combine multiple Atrium models to create a fully immersive listening experience with balanced coverage across large spaces. Whether you're hosting a backyard gathering or enjoying a quiet evening outside, the Atrium series offers the performance and flexibility to elevate every moment.

Key Technologies

Polk’s patented Power Port design provides greater surface area and smoother air flow for more output and less distortion compared to conventional ported speakers.
Proudly engineered and designed in Baltimore, Maryland, Polk products are crafted to meet high standards of quality, performance, and reliability, ensuring a premium audio experience that is the pinnacle of American Hi-Fi.
Polk’s exclusive lightweight Dynamic Balance® Polypropylene Cones deliver spectacular midrange clarity, punchy bass and high efficiency.
Atrium Series speakers exceed baseline industrial and military specifications for environmental endurance (ASTM D5894-UV Salt Fog, Mil Standard 810 Immersion, Mil-Std 883 Method 1009.8 for salt and corrosion).

Polk’s patented Power Port design provides greater surface area and smoother air flow for more output and less distortion compared to conventional ported speakers.
Proudly engineered and designed in Baltimore, Maryland, Polk products are crafted to meet high standards of quality, performance, and reliability, ensuring a premium audio experience that is the pinnacle of American Hi-Fi.
Polk’s exclusive lightweight Dynamic Balance® Polypropylene Cones deliver spectacular midrange clarity, punchy bass and high efficiency.
Atrium Series speakers exceed baseline industrial and military specifications for environmental endurance (ASTM D5894-UV Salt Fog, Mil Standard 810 Immersion, Mil-Std 883 Method 1009.8 for salt and corrosion).

Compare Polk Outdoor Speakers

This Product

Atrium 8 SDI

High-Performance Outdoor Speaker with 6.5" Driver

$299 / each

6.5" Dynamic Balance® polypropylene woofer

Dual 1" Anodized Aluminum Dome tweeters

Speed-Lock Mounting system

High-performance in medium-to-large outdoor spaces.

Atrium 6

Outdoor Speakers with 5.25" Drivers

$449 / pair

5.25" Dynamic Balance® polypropylene woofers

1" Anodized Aluminum Dome tweeters

Speed-Lock Mounting system

Big, high-quality sound for medium-to-large, outdoor spaces.

Atrium 5

Outdoor Speakers with 5" Drivers

$349 / pair

5" Dynamic Balance® polypropylene woofers

3/4" Anodized Aluminum Dome tweeter

Speed-Lock Mounting system

Big, quality sound for small-to-medium, outdoor spaces.

Atrium 4

Outdoor Speakers with 4.5" Drivers

$249 / pair

4.5" Dynamic Balance® polypropylene woofers

3/4" Anodized Aluminum Dome tweeter

Speed-Lock Mounting system

Quality sound for small-to-medium, outdoor spaces.

Shop the complete system

Take the guesswork out of building an outdoor sound system when you buy a bundle—with or without an AVR—and save when you purchase products together.

Outdoor Component System

Upgrade your outdoor experience with booming bass and expansive sound with this outdoor speaker bundle. Connect with your AVR and create an outdoor soundscape worthy of your space.

Atrium Multi-Zone Powered System

Create a complete outdoor soundscape with this ready-to-go Atrium system. Sound will follow you everywhere you go, with subtly placed in-ground and mounted speakers and two subwoofers for big bass impact. Power it all with the included 7.2-channel Denon AVR-X3800H.

Atrium 8 SDI

Details & Specifications

OVERALL

Total Pieces 1
Cabinet Warranty 5 Years - Original Purchaser Only
Drivers Warranty 5 Years - Original Purchaser Only
Original Purchaser Only Yes
Carton 1 13.5 lbs (6.12 kg)

ALL WEATHER OUTDOOR LOUDSPEAKER

Qty Included 1
Availability US
Orientation • Horizontal
• Vertical
Height 12.875" (32.7 cm)
Width 8.5" (21.59 cm)
Depth 9.188" (23.34 cm)
Weight 9.7 lbs (4.4 kg)
Front Array Driver Enclosure Type Durable, mineral-filled polypropylene cabinet design
Front Array Driver Complement • (1) 6.5" (16.51 cm) d (Round) Dual voice coil driver with Dynamic Balance aerated polypropylene cone with rubber surround - Mid/Woofer
• (2) 1" (2.54 cm) d (Round) Anodized aluminum dome with neodymium motor structure - Tweeter
Total Frequency Response 45 Hz → 27,000 Hz
Nominal Impedance 8 ohms
Sensitivity (1 watt @ 1 meter) 91 dB
Mounting Type 180° Speed-Lock mounting system with Keyhole Slots
Available Orientations • Horizontal
• Vertical
Audio Inputs -
Speaker Inputs (2) Pair of Switchable single / dual 5-way Binding Posts - Gold-Plated