LEGENDARY KLIPSCH ACOUSTICS in the Sound Bar Two 3/4” tweeters with 90° x 90° Tractrix horns deliver crisp highs, while two 3” woofers round out the enhanced sound with clear vocals and dynamic soundtracks. Horn loaded drivers direct the sound to more efficiently bring the detail to the listener. 6.5-INCH WIRELESS SUBWOOFER The BAR 40 comes with a wireless 6.5” subwoofer that you can place anywhere in your room. Wireless 2.4 GHz technology automatically connects the sound bar and the subwoofer together. There is also a subwoofer output meaning you can add a second subwoofer to your setup or simply replace the included wireless subwoofer with the subwoofer of your choice.