Compact stereo for the patio
The Polk Audio Atrium 4 pair brings left and right music channels to a patio, porch or small garden. Each passive speaker combines a 4.5" Dynamic Balance polymer woofer with a 0.75" anodized aluminium dome tweeter.
The compact cabinet measures about 144 x 219 x 170 mm including bracket and knobs, making narrow mounting positions easier to plan. Its 180° Speed-Lock bracket aims each speaker at the listening area. Gold-plated five-way posts take speaker cable from an amplifier.
Key features
- 4.5" woofer and 0.75" aluminium tweeter per speaker
- 10-80 W recommended; 75 Hz-25 kHz overall response
- Adjustable Speed-Lock bracket and five-way posts
- About 144 x 219 x 170 mm per speaker
Placement and connections
Overall response is 75 Hz-25 kHz and recommended amplification is 10-80 W per channel. Compared with Atrium 5, this model occupies less space and uses a smaller woofer; the 5 steps up to a 5" driver for a more open area. A source and amplifier are required, as these are not standalone Bluetooth speakers.
The mineral-filled polypropylene enclosure and coated aluminium grille are designed for outdoor installation. Plan a suitable cable route and check the mounting surface before fastening the brackets. The offer includes both speakers for a left and right stereo layout.
