Key Features

Durable Indoor/Outdoor Design
The Atrium 4 speakers are built to handle outdoor conditions — weather-resistant (rain, splash, humidity) — while still being suitable for indoor use.
Two-Way Speaker Configuration
Each speaker integrates a woofer + tweeter setup for a balanced sound covering bass, mids, and treble.
Good All-Around Sound for Home & Outdoor Use
Delivers consistent audio suitable for music, ambient/background audio, TV/music outdoors, or casual listening at home.
Flexible Placement Options
Can be installed outdoors (balcony, garden, patio) or indoors (living room, balcony, covered spaces) depending on requirement and layout.
Pair Configuration (Stereo or Dual-Zone Use)
Sold as a pair — useful for stereo setups or to cover larger areas by placing one speaker in different zones.
Aesthetic Finish & Colour Variety
Available in Black or White finish to match room décor or outdoor environment — offers discreet look or contrast depending on placement.
Compatibility with Standard Amplifiers / Receivers
Works with conventional home audio amplifiers or AV receivers — no need for specialized hardware.

Description

Polk Audio Atrium 4 Indoor/Outdoor Speakers (Pair)

All Weather Outdoor Loudspeakers with 4.5″ Drivers and 3/4″ Tweeters

All Weather certified
Speed-Lock mounting system

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-the-way installations.

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	4.5″ (11.43 cm) d (Round) – Mid/Woofer 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
Recommended Amplifier Power Per Channel	10 watts →80 watts
Ethernet	Yes
Speaker Inputs	Pair of 5-way Binding Posts – Gold-Plated