i have a jvc dvd home theater system model # thm505 with the subwoofer model # sp-pwm505, the problem i am having is when i turn the system above 50 and bass hits the sub turns off. All of my speakers run out of the amp in the sub, so all sound is lost. i can turn the system off and right back on and it works just fine till another bass note hits. Also the fan on the back of the sub does not come on at all. Any help would be appreciated. I am replying to PECHORINS. Thank You.

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