I have the Kenwood HTB-504 and it sounds great and all but my subwoofer kicks in and out sometimes. Like if I'm watching a movie and there is very subtle bass, then I will hear the subwoofer "click" and it produces no bass. But as soon as a bass heavy scene comes on it will "click" and the bass kicks in all of a sudden. At first I thought there may have been a short and the subwoofer was powering off when it clicked but it's not because the the light on the back stays on. Is there some type of setting I can change to avoid this?