Summary: You will definitely need the 5 year warranty on these speakers. I purchased these speakers and within 1 week both tweeters were bad. I am told by the folks at Polk audio that I don't have enough power from my Dennon 100 watt system. This is my third set. The first were rated for 150 watts, when the tweeters blew instantly, the folks here at Crutchfeild advised me to get a smaller set. They exchanged with no problem. I have nothing but rave reviews for Crutchfield.