Almost threw myself through the wall.... Planned on doing my amp/sub install today. 500 watt Alpine powering a 10" Sundown Audio sub. Got everything wired up and ready to test. Turn on the radio and zap, amp blew a fuse. Spent 3 hours trying to figure out what the deal was before I went to my audio shop. They had tested the sub in the box the previous day before I picked it up and it worked great. They determined the sub was blown somehow. So they gave me a loaner sub for the time it takes to replace my Sundown. They put in a Digital Designs and got it all wired back up, didn't blow the fuse but the sub started smoking after a bit. Turns out to be bad amp.
I am livid. Luckily warranty covers both so it's just more waiting....