New to audio just a head up. I bought a Klipsch subwoofer to go with my Edifier 1700bt. This is my audio setup for my dorm room so I'm using a Dell XPS 15 as my computer. Noob mistake and thought all you do is connect the sub to the bookshelf speaker but apparently not. So how do I get my subwoofer to work with my setup? Which adapter or cable do I got to buy? The subwoofer only has a Line In, and the speaker only has a pc in and aux in.