I added a Logitech X2300 to my KN7000. Store price is $159. On the web the was $99, and on a special it was $69. You can control the amount of bass and treble that is amplified. I use the Logitech mainly at home. Although the KN7 has a good amplification system the Logitech X2300 adds that little extra. I would spend $159 if I had to replace the one I have.

(Logitech is used to amplify computers)
John C.