the model 4400 sr dipole/bipole surround speaker is purpose built for use in multi-channel audio/video sound systems as dedicated side or back surround channel speakers. the 4400 sr enclosure has two 4.5" (115mm) glh woofers and two identical high performance silk dome tweeters as found in the 4400 lr front speaker. to further showcase the 4400 sr"s flexibility, the 4400 sr can be easily switched between dipole and bipole operation.general information manufacturer atlantic technology general information manufacturer part number 4400sr-p-blk general information manufacturer website address atlantictechnology general information brand name atlantic technology general information product model 4400 sr general information product name 4400 sr speaker general information packaged quantity 2 general information product type speaker warranty standard warranty 90 limited physical characteristics weight (approximate) 11.00 lb