Atrium 4 vs Atrium 5
The Atrium 5's sensitivity is 90 dB against the Atrium 4's 89 dB. Both share impedance (8Ω), high-frequency extension (25 kHz), and ways (2).
AI-generated product photo — not official manufacturer imagery.
LoudspeakersOutdoor Speakers
Estimated price (community-sourced)
$139 - $199
Around — community and catalog average, updates slowly
About the Atrium 4
The Polk Audio Atrium 4 are compact, all-weather certified outdoor speakers designed for durable performance in harsh environments, exceeding military specs for UV, salt fog, immersion, and corrosion (ASTM D5894-UV Salt Fog, Mil Standard 810, Mil-Std 883). Featuring a 4.5" Dynamic Balance mineral-filled polypropylene mid/woofer with butyl rubber surround and a 0.75" anodized aluminum dome tweeter with neodymium magnet and rubber surround, they deliver punchy bass, clear midrange, and smooth highs with wide dispersion via a steeply-angled baffle. The sealed, mineral-filled polypropylene cabinet with molded-in bracing, aluminum grilles, stainless steel/brass hardware ensures rust-proof longevity. Easy 180° Speed-Lock mounting system allows one-handed installation in horizontal/vertical orientations. Gold-plated 5-way binding posts provide secure connections. Ideal for patios, poolsides, or indoor use like kitchens. 5-year warranty on cabinet and drivers.
Specifications
Transducer Specifications
Driver and acoustic performance characteristics
- Sensitivity
- 89 dB SPL @ 1W/1m
- Impedance
- 8Ω
- Frequency Response
- 75 Hz - 25 kHz
- Power Handling
- 80W
- Min. Amplifier Power
- 10W
- Max. Amplifier Power
- 80W
Speaker Design
Driver configuration and enclosure design
- Configuration
- 2-way
- Driver Type
- dynamic
- Driver Size
- 4.5"
- Driver Count
- 2
- Enclosure Type
- sealed
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 144.5 × 219.1 × 169.9 mm (W × H × D)
- Weight
- 1.63 kg (4 lbs)
Key Specifications
Sensitivity: 89 dB
Impedance: 8Ω
Frequency: 75-25000 Hz
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions