I know my local shop will replace a crossfire sub regardless. I mean I bought sundown and I like sundown better for several reasons. However I have a goofy friend that bought an entry level cross fire sub and a 500.1 crossfire amp he blew 2 subs and they switched them out no questions asked. On the 3rd he upgraded to the mid level and he hasn't blew it but I don't know how it hasn't blowed lol he distorts that thing to death.