I purchased 2 kef ls50 speakers and attached them to a Sony STR za2100es receiver. This sound system was for my 65 inch tv system. The sound was never that good. After a few months my speakers stopped working and the plastic fronts were blown out, completely broken. I posted the picture below. Has anyone else ever seen this. I brought the speakers and receiver to a local audio store and they are shocked that this happened they have tested the receiver with another set of speakers and found no problems.