I shop I always buy from sells both Diamond and JL (as well as a lot more). I also know that if anything happens to either I can just take it back to them and they cover it. I was being stupid at a soundoff once in their parking lot and blew 4 MTX 8000 subs at the same time. They sent them in and got them reconed (which was actually 4 brand new ones) at no cost to me. They also custom built a ported box for me to demo the TDX in so I could decide if I wanted to buy some subs or not, because I would run them in a ported enclosure instead of a sealed.