Enjoy audio from nearly any source with this pair of Klipsch R-51PM 2-Way Powered Bluetooth Bookshelf Speakers. They feature Bluetooth wireless connectivity plus stereo RCA, optical, and 1/8" aux inputs for traditional wired devices, and a USB Type-B input for music stored on your computer. The RCA input is switchable between line-level and phono inputs, allowing you to switch between a turntable and other wired sources. The R-51PM speakers have a 2-way design with a built-in 60W per channel amplifier. Each speaker sports a 1" aluminum tweeter on a 90 x 90° Tractrix horn and a 5.25" copper-spun IMG woofer.