Oh, and what do you have those kenwood amps wired to? I had a couple 12's wired at 2 ohms, set the gains right before clipping which was like 750 watts.. boom a week later your problem showed up. I would turn the volume down and it would stop and play constant.. I grabbed a clamp and volt meter, checked the output.. 400 watts. That amp just seems to be SHIT! It'll play all day at 400 watts.. Try it, set the gains for 400 watts and see if you find the same thing. Just barely going over 430 watts would make mine lose power.