Hey man. Plug anything in yet? I was able to mess around with one of my dad's old Sony stereo receivers. The Jamo's sound... wow. Really nice. With a very subtle bass boost, I am convinced there is a small subwoofer on, and without it, there is still a good amount of low end, plenty for most music. The only time you would really want a sub, in my opinion, is if you listened to a lot of music with heavy sub bass, or home theater stuff.