Atrium 8 SDI
Atrium 8 SDI
Atrium 8 SDI
Atrium 8 SDI

Atrium 8 SDI

High-performance Outdoor Loudspeaker with 6.5" driver

£299

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

Atrium 8 SDI

£299
£299
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Extraordinary bass response

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.

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.

Outdoor speaker family

Incorporate multiple Atrium speakers together to create the ultimate outdoor speaker system.

Key Technologies

  • Power Port 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.
  • Engineered and Designed in USA 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.
  • Polk Audio All-Weather Certified 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).
  • Power Port 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.
  • Engineered and Designed in USA 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.
  • Polk Audio All-Weather Certified 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
Atrium 8 SDI
High-performance Outdoor Loudspeaker with 6.5" driver
£299
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
Atrium 6
Outdoor Speakers with 5.25" Drivers
£479
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
Atrium 5
Outdoor Speakers with 5" Drivers
£419
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
Atrium 4
Outdoor Speakers with 4.5" Drivers
£299
4.5" Dynamic Balance® polypropylene woofers
3/4" Anodized Aluminum Dome tweeter
Speed-Lock Mounting system
Quality sound for small-to-medium, outdoor spaces.
Atrium 8 SDI
Details & Specifications
  • Total Pieces 1
  • Cabinet Warranty 5 Years - Original Purchaser Only
  • Drivers Warranty 5 Years - Original Purchaser Only
  • Warranty Yes
  • Carton 1 6.12 kg
  • Qty Included 1
  • Availability US
  • Orientation • Horizontal
    • Vertical
  • Height 32.7 cm
  • Width 21.59 cm
  • Depth 23.34 cm
  • Weight 4.4 kg
  • Front Array Driver Enclosure Type Durable, mineral-filled polypropylene cabinet design
  • Front Array Driver Complement • (1) 16.51 cm d (Round) Dual voice coil driver with Dynamic Balance aerated polypropylene cone with rubber surround - Mid/Woofer
    • (2)  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
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