Quick questions out there. I had my sub hooked up to my amp for like the last three years no problem and then i got a pioneer premier sub. Now I notice that the amp turns on for like a minute and then switches off and then back on and then off. Also, when I have my stereo volume is turned all the way down, my sub still thumps every now and then. The guy at Best Buy told me that my sub is to powerfull for my amp and that I needed to go buy like a $500 amp. Is he correct or do I just need a new amp. My amp is about 10 years old and pushes 150 watts however, I don't know what the wattage is on my sub. Any help would be appreciated. Thanks.