I posted a while back for clues on filling a JBL void in a larger structure. Zilch suggested the 4628B's and adding a subwoofer "If you must" with some crossover and driver modifications. I may have found a pair within a reasonable distance.
Interestingly, the fellow considering selling stated he was disappointed with them. If I can paraphrase him correctly he indicated they were great when highly powered but showed rather limited lower-frequency response when used as 'regular' speakers at low volume. I realize speaker listenability is quite subjective but would ask others that own them to comment as I continue my search. And if anyone in SE michigan has a pair please invite me to listen. I'll bring the beverages. .