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Polk Atrium 4 All Weather Outdoor Loudspeakers With 4.5" Drivers And 3/4" Tweeters (Pair)

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Big Fidelity, Small Speaker. The Compact Atrium4 loudspeaker produces high fidelity sound quality anywhere you want great sound. Its small size makes it ideal for tight, out-of-way installations.

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

The perfect material performance, eliminating driver and tweeter "artifacts" for more realistic sound reproduction at high and low volume levels. To install, simply mount the bracket and click the speaker into place then aim it and tighten it down.

Simply mount the bracket and click the speaker into place, Aim it and tighten it down.

The real question is, why anything else? We’ve always made the best speakers at the best price - that’s it.

But for storytelling’s sake, let’s back it up to 1972 where a group of friends, talented engineers, and music lovers got together with the skillset, the ambition to make the best speakers they could afford, and the attitude to change the establishment. That day, a speaker company was born with a clear vision for quality and a powerful mission for value.

Each and every day since then, all Polk products are the result of tight-knit collaboration, teamwork, and our collective passion to make great sound available to as many people as humanly possible.

A mission like that requires more than engineering expertise. It requires inventive spirit, hard-earned experience, and intuition. It’s that intuition—the most magical human ingredient—that bestows Polk products their sonic personality and pride of place in your home. To this day, design, acoustics, engineering (and ingenious, intuitive human magic) all happen under one expansive roof under the guise of democratizing sound. Because we mean it when we say great sound shouldn’t be a privilege of the few, it should be accessible and available for all.


  • Total Pieces: 2
  • Cabinet Warranty: 5 Years - Original Purchaser Only
  • Drivers Warranty: 5 Years - Original Purchaser Only
  • Original Purchaser Only: Yes
  • Carton 1: 9.5 lbs (4.31 kg)
  • Qty Included: Pair
  • Availability: US Internationally
  • Orientation: Horizontal, Vertical
  • Height: 8.625" (21.91 cm)
  • Width: 5.688" (14.45 cm)
  • Depth: 6.688" (16.99 cm)
  • Weight: 3.6 lbs (1.63 kg)
  • Front Array Driver Complement: (1) 4.5" (11.43 cm) d (Round) - Mid/Woofer, (1) 0.75" (1.91 cm) d (Round) - Tweeter
  • Total Frequency Response: 75 Hz → 25,000 Hz
  • Nominal Impedance: 8 ohms
  • Sensitivity (1 watt @ 1 meter): 89 dB
  • Mounting Type: 180° Speed-Lock mounting system with Keyhole Slots
  • Recommended Amplifier Power Per Channel: 10 watts → 80 watts
  • Ethernet: Yes
  • Speaker Inputs: (2) Pair of 5-way Binding Posts - Gold-Plated


For Residents/Customers in California:
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