Energy RC-Mini Bookshelf Speaker (Single, Black) Single compact 2-way bookshelf speaker designed for a large or small space surround sound solution Equipped with a 1" aluminum dome tweeter and a 4.5" Kevlar(TM) cone woofer Exclusive Hyperbolic(TM) dome tweeter and patented Ribbed Elliptical Surround technology Frequency response: 80Hz-23000Hz +/- 3dB May be wall mounted with included bracket