Klipsch Epic CF4

The Klipsch forum says:

Rev.3 – Summer of 1995 to end of production in 1996

1. These models had new lighter cone woofers (new vendor) (these cones aren’t nearly as stiff as the originals and can be deformed much easier by pressing on them)
2. Networks were changed to compensate for the new woofers

Yes russ69, you are right. I own version 1 and I had heard that the bass drivers were changed after that as well as the port tubes. Thanks for the clarification.  

Good news after further testing the speaker is not bad cabinet is rattling will try to silicone it from the inside I am the original owner so I guess after 20 plus year the seal is not as tight .

Some people will add internal bracing. I haven't tried it myself, but something to consider.

Cabinet rattling is a somewhat common problem for some Klipsch of that era.  Typically, it is the rear (or front in some cases) panel  which is glued in becomes loose and rattles.  An internet search for Klipsch cabinet rattle will bring up lots of advice on some Klipsch specific forums...