I know of the LE matrix which is very usefull to all of us, but is there anything like that for the

(034 044 066 OBSOLETE) 035ti 035tia 044ti 052ti 053ti 053tis ??

I have a couple of JBL L150 and one couple L150A

once the 034 and the 044 are gone which of the current models could replace them??
which could improve them?