Kanto YU6 powered bookshelf speakers provide powerful stereo sound with flexible source support. The pair uses a 200W peak Class D amplifier, 5.25-inch Kevlar woofers and 1-inch silk dome tweeters. Connect a turntable through the built-in phono preamp, stream with Bluetooth 4.0 aptX, or use optical, Rca and Aux inputs. A subwoofer output and Usb charging port add extra system flexibility.