I have a Alpine mrd-m1005 amp running a kicker l7 15 in sub. It had worked greaet for the past 4 months after being perfessionally installed. Now after playing it pretty loud one time, the amp will cut on and off randomly. Most of the time the amp will remain off, but every now and then the amp will turn on and the sub will work for about a minute. Everthing else works fine. Whats up?