After recently reaquiring a pair of 4310's I had sold to a relative in 1986, I hooked them up and did a quick listen.
The sound of the old L-100 vibe was surprising, after being used to listening to my 4410's. They are noticably more efficient and punchier, even after their 36 years of Alnico aging. Not a bad sound, but alas they do not image well compared to the 4410's. (The 4310's ARE currently set up in a nearfield configuration, where their imaging quality should be optimum). They do not sound quite as clean either, though I suspect that is due to crossover issues. One area where they are most impressive is in the bass. Those old 123's really grind out the bottom, and are actually quite close to producing the distinct bass notes indicative of low harmonic distortion, vs. the individual notes being masked by a lot of "flubb".
I think an upgraded crossover would solve all these "problems".
What do you JBL mavens think of this crossover design? Thanks in advance for your valued input, Richard.
URL= http://www.troelsgravesen.dk/JBL_L100.htm#The Kit