Look I'm not hawking any aftermarket parts but I question that this is actualy true. I also question that in at least some cases it must be theoreticlly possible for another company to make a part that would make a JBL driver better. I am not aware of any but that is beside the point. If we all think lock step with JBL why are we working mostly on devices that they have all but abandoned? I don't want quoted saying any other diaphragm is as good as JBL. I've made no such statement. I also have not said that that no one else does as I don't know but this isn't religeon. Except for a very few among us JBL doesn't know us or care a lot one way or the other about us. It wouldn't hurt for those very few to introduce themselfs but perhaps they have their reasons not to. I don,t understand this getting so overheated. You would think someone had badmouthed your football team or for some insulted your god. I don't get it. Ian, I thought your football was the same as ours you just don't understand the rules.