You may be onto something with clipping sounding like a Kazoo.

The problem with clipping is that it tends to blow your tweeters.

I have had "blown" speakers in a car system and they would still work. They just sounded bad.

If you can look inside your speakers, see what sort of drivers are in them. Maybe you can listen to each individual driver and see how it sounds.

The Rat. M80s, VP-150, QS8s, SVS PC 20-39+, OPPO, Onkyo 703s, Harmony 880 Sony 60" SXRD HDTV