I'm starting a new thread on this because I need an answer pronto and I've shifted thru the past threads without finding what I'm looking for. The dumba$$ that put the foam on the outside of the cones on my 2121's says that there's no sonic difference and he showed me several other speakers by other manufactures that came out of the factory with the foam on the outside of the cone. My response to him was that JBL puts the foam on the back of the cone for a reason plus I told him from the beginning that I wanted these speakers to look identical to the ones I brought in. So what exactly is the difference and what is my reason for suing this guy for putting the foam on the "wrong" side of the cone and now having to spend at least $700 for reconing with JBL cone kits verses $150+/- for new foam.