It's a known issue with Clarion remotes, your remote cable is getting interference. Mine does it every now and then. Likely interference between the sub amp and the remote cable.
You can either reroute the remote cables or replace the remote cables with shielded cables. Take it to Liquid Trends.
PM me if you have more questions
mikeskiw@gmail.com (Message edited by mikeski on June 21, 2008)