Due to recent posts and the interest in aftermarket replacement diaphragms, after six years of doing so, I am no longer sourcing genuine JBL replacement diaphragms at deep discount for forum members. This was one of the perks for members of this forum only and was never once offered outside of this forum. I've been notified that the aftermarket diaphragms work just fine and sound just fine so there is virtually no reason to continue with this perk. I'm sure there are several forum members who will step forward and provide whatever data someone might feel is necessary. I am through with this subject and don't intend to respond further.