The Kilomax doesn't have a shorting ring. The Magnums have a shorting ring which reduces distortion. All of the JBL drivers have shorting rings.I would prefer the Delta 10 in the midhorn except in cases where the rear chamber is made large and vented to do double-duty as a bass system. The midhorn with the Delta 10 has a little better upper midrange output, and it has better power handling too. Even if you're not planning to push them, it's nice to have the overhead.