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The Polk Atrium4 is a compact 2-way outdoor loudspeaker with a 4-inch polypropylene woofer and an aluminum dome tweeter, rated for 8-ohm loads and 89 dB sensitivity. Its weatherproof cabinet, rustproof aluminum grille and bracket, and stainless/brass hardware are built to survive sun, rain and seasonal swings. The Speed Lock mounting system and small footprint suit tight spots like eaves, patios and poolside walls. It is a passive speaker, so it needs an amplifier or receiver, and it has no Bluetooth or app control, unlike powered outdoor speakers.
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In stockSold by Walts TVReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
Availability unknown
As an Amazon Associate, Deal.ai earns from qualifying purchases.
Availability unknown
As an Amazon Associate, Deal.ai earns from qualifying purchases.
Store links may earn us a commission. Some prices via Klarna.
Lowest price we've seen: $238.51 on Nov 13 at Amazon. Tracked across 4 stores since Nov 13.
Owners of the Atrium line generally praise the build and the sound for the size, and the Atrium4 carries that reputation as a small, tough outdoor speaker. Common complaints center on modest bass and the need for external amplification.
The Polk Atrium4 is a compact all-weather outdoor loudspeaker. Its small size suits tight or out-of-the-way installations. Each speaker has an aluminum dome tweeter and a polypropylene cone driver.
Polk's Dynamic Balance and Klippel Optimization technologies are used to reduce driver and tweeter artifacts at high and low volume levels. The weatherproof cabinet has a rustproof aluminum grille, a rustproof aluminum bracket, and stainless steel and brass hardware. Polk's Speed Lock Mounting system is used for installation.
