Inside the completely sealed enclosure is a 5.25-inch Dynamic Balance mineral-filled polymer driver with butyl rubber suspension for pumping out amazing bass, while its 1-inch soft dome tweeter with neodymium magnet broadly distributes high frequencies to cover a large area with high fidelity sound. Polk's Dynamic Balance technology produces flat frequency response, sharp detail, transparency and an ability to play program material with wide dynamic range at life-like volume levels without a hint of strain. The sound is always clean, clear, and effortless. The sculpted front baffle and rounded enclosure minimizes diffraction (sound reflecting off of hard edges) for more open and lifelike imaging.

Connect them to an amplifier or receiver using the set's gold-plated five-way speaker-level binding posts. The Atrium 55s are also voice-matched to Polk's RTi speakers, and therefore make great surrounds in a complete Polk home theater system with the ability to handle up to 100 watts per channel.

What's in the Box
Pair, Atrium 55 speakers (white), mounting brackets, manual, 2-year parts and labor warranty.

Product Description
frequency response 60-20,000 Hz (-3dB) * sensitivity 90 dB * 8-ohm impedance * handles up to 100 watts * gold-plated 5-way binding posts * all hardware is rust-proof brass or stainless steel * meets or exceeds ASTM D5894-UV Salt Fog, Mil standard 810 Immersion and Mil standard 883 Method 1009 8 for salt and corrosion tests * speaker grilles and mounting brackets are rust-proof aluminum * mounting brackets included * 10"H x 7-9/16"W x 7-13/16"D * warranty: 2 years