I can't remember when the 4345's replaced the older JBL Pro components. I think it was mid 80's. And we thought the older JBL Pro components sounded fantastic. The 4345's were a definite upgrade!
These days I think Gates is all Meyer stuff.
The absolute worst JBL system I ever heard was the ring of 4311's or 4312's around the Planetarium at Griffith Park. OMG!
I think there were something like ten pairs. Utterly pathetic after hearing the JBL Pro components at Gates.