Model
Brand
Polk Audio
Model
Atrium 4
Part Number
AM4085-A
Details
Type 
Indoor/Outdoor Speakers
Sold As
Pair
Speakers Configuration                             
Indoor / Outdoor
Driver Units 
Mid/Woofer: 1 - 4.5" Diameter, Dynamic Balance Mineral Filled Polymer Cone with rubber surround

Tweeter: 1 - 0.75" Diameter, Anodized Aluminum Dome Tweeter with Neodymium motor structure
Power Rating 
10-80 w/channel
Frequency Response                        
75Hz - 25kHz
Nominal Impedance                      
8 Ohms
Sensitivity 
89 dB
Connectors
Gold-plated 5-way Binding Posts
Color
Black
Cabinet
Sealed
Features
Features                                        
Durable, mineral-filled polypropylene cabinet design, with molded-in bracing, sounds like a real speaker (not "an outdoor speaker"), and survives years of seasonal changes, for truly great sound, no matter what the weather.

Exclusive Dynamic Balance and Klippel Optimization technologies ensure the perfect material performance, eliminating driver and tweeter "artifacts" for more realistic sound reproduction at high and low volume levels.
Dimensions & Weight
Dimensions & Weight
8.63" x 5.69" x 6.69" / 3.60 lbs.