Description

Enjoy exceptional outdoor sound without compromising on space with the Polk Atrium 4 All-Weather Outdoor Loudspeakers. Perfect for gardens, patios, balconies, terraces and commercial outdoor seating areas, the Atrium 4 delivers impressive clarity and balanced audio from a compact, discreet design that’s built to withstand the elements all year round.

Equipped with a 4.5-inch Dynamic Balance® polypropylene woofer and a 3/4-inch anodised aluminium dome tweeter, the Atrium 4 produces crisp highs, detailed midrange and surprisingly rich bass for its size. Polk’s Dynamic Balance technology helps minimise distortion, ensuring your favourite music sounds clear and natural even at higher listening levels.

Designed specifically for permanent outdoor installation, the Atrium 4 is Polk All-Weather Certified, exceeding demanding industrial and military standards for resistance to rain, humidity, salt, UV exposure and extreme temperatures. Whether mounted on a garden wall, under a patio canopy or in a commercial outdoor venue, these speakers are engineered to deliver reliable performance year after year.

Installation is fast and secure thanks to Polk’s Speed-Lock™ Mounting System, allowing simple one-handed installation with both horizontal and vertical mounting options. The adjustable brackets make it easy to position the speakers for optimal sound coverage across smaller to medium-sized outdoor spaces.

Ideal for residential and commercial installations alike, the Polk Atrium 4 is perfect for background music, outdoor entertaining, cafés, restaurants, hotels and garden entertainment areas where premium sound and durability are essential.

Key Features

  • Premium all-weather outdoor loudspeakers (pair)
  • 4.5″ Dynamic Balance® polypropylene woofer
  • 3/4″ anodised aluminium dome tweeter
  • Compact design for discreet installation
  • Clear, balanced sound with low distortion
  • Polk All-Weather Certified
  • Speed-Lock™ one-handed mounting system
  • Horizontal or vertical installation
  • Frequency response: 75Hz – 25kHz
  • Recommended amplifier power: 10–80W per channel
  • Ideal for gardens, patios, balconies, terraces and commercial outdoor spaces

Whether you’re relaxing in the garden or creating the perfect atmosphere for customers, the Polk Atrium 4 delivers dependable, high-quality outdoor audio in a compact, weatherproof package.

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SPECIFICATION

Qty Included: Pair
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
Available Orientations: Horizontal / Vertical
Recommended Amplifier Power Per Channel: 10 watts → 80 watts
Audio Inputs:
Ethernet: No
Speaker Inputs: (2) Pair of 5-way Binding Posts – Gold-Plated
Carton 1: 9.5 lbs (4.31 kg)
Total Pieces: 1