How would these JBL coaxesmodel LE14C 2 way Co-axial with L compare to the EV 12trxb?

[whitese]

or how good are they in general, and what kind of cab would work best for them?

[4313B]

I personally wouldn't waste my time on the LE14C unless they were in perfect condition.
JBL does still have the LF kits available but the HF kits are NLA.

[MJC]

[QUOTE=whitese]or how good are they in general, and what kind of cab would work best for them?

I've got a LE14C in a L55 cabinet with the HF hole filled in. I use it as a center channel speaker with two original L55s as the L/R. The L55's woofer is a LE14A.
The combo makes for good 3 channel stereo.