LSi9

I just purchased a pair of LSi9's and the plate on the back is cracked along the perimeter near the corner posts. Will this drastically change the sound quality of the speaker or do I have to be a major audiophile to notice the difference? I blasted the speakers and couldn't notice anything. I need to know whether I should return them or not..

Yeah, exchange them. It probably won't affect SQ, but if you paid retail price for new speakers, you shouldn't settle for damaged merchandise. It could hurt you in the long run if you decide to sell them.