Quote:
The K145 is, IMO, more interesting. It can be used as a woofer, but at the same time, it represents something a bit special for midrange. It is popular for midbass horns too. It too does have a rather limited x-max. Making a new version of it could be interesting, but I would probably rather give it a good 8-10mm x-max than the 5mm of the original.
The K145 and E145 are short coil log gap so the coil is 100% in the gap even at extremes. The E has significantly longer xmax about a 3rd more. You are going to end up with a very thick top plate and end up needing subs anyway if you keep everything else the same.