Hey guys,

OK, I've got a rockford mono amp running 2 -10" Alpine Type R subs in my trunk and a 4-channel rockford amp running the 6x9 Infinitys in the car with a premier deck and a rockford cap connected to the amps. I've had the system for about 2.5 yrs now.

I've recently noticed when I have my subs turned off, according to my deck, once in awhile I'll get a couple thuds all at once from the subs. Sometimes it's only 1 thud and then nothing and other times it carries on for a few minutes. It's very intermittent and random from what I can tell; it occurs both when in CD and Tuner mode. The bass also sounds extremely distorted and loud/powerful all the time.

I took it in to a car audio specialist and he thought that I blew the subs, so I went and replaced them...nothing has changed, it's still occuring. I'm thinking it may be the deck now, but am unsure...would like to get your opinions before I make any more significant purchases. Thanks for any help you can send this way !!