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The L100 was an iteration of the 4310/11 series. The 4412, with the titanium tweeter, was a similar but different animal. Years ago JBL discontinued the LE25 tweeter used in the 4310, 4311 and L100. The 035Ti tweeter from the 4312 (and L100T--a tall floor standing consumer loudspeaker) was JBLs recommended replacement for the LE25.This is my 'casual listening vintage system'. The speakers are JBL 4412s, which are basically the studio version of the L-100s which are in vogue now. Keep stuff long enough and suddenly its hip again. Maybe If I stay around long enough, I'll be hip again too.
In fact, I used the 035Ti tweeters in my L100s, as the original tweeters were damaged in a move. They are not quite drop in, because the 035Ti baffle is round, whereas the LE25 is square, requiring some hacking in order for it to fit. In my estimation (FWIW) the 035Ti was a great tweeter, but brightened the L100 top end, which was not really what that loudspeaker needed.
Several years a go I replaced the 035 set with two LE25 knock-offs I bought from one of the large raw speaker supply houses, said to be made according to OEM specs. Who knows about that? However from my memory (which one can't really rely on) they sound the same in the box as the original JBL LE25. I still have the 035Ti, which I'll auction off on ebay once I'm dead.
Also, FWIW, the L100 works better with some EQ tweaking. In my room I begin a bass roll off at about 160Hz, and create a mid/high dip at 6.3 kHz (using a dbx 215 professional two band equalizer). Then cross over to a sub to reinforce the low bass, at 80Hz or so. It's kind of screw-ball, and done by ear, however those settings work pretty well in my room. The L100 are also on stands, 18 inches from the floor. That does away with the Maxell 'blown away' effect.