Here is the photo of my pile of JBL Studio Monitors. Since I had pairs of these four models, I decided to arranged these to mimic an old JBL brochure photo. Starting from the upper left is my 4312A, over to your right the 4333B sitting on top of a 4320 (2405 moved to center top) and at the lower left is my newest aquisition, one of my just completed pair of 4343s.
Finding these and painstakingly refurbishing them has been a great learning experience and has been very satisfying. They all sound sound slightly different from each other, but they all sound great!
Thanks again to all of you who shared your knowledge and help in these projects.
Tom Loizeaux
P.S. I just realized that I left the grille on the 4312A...oh well. Since I didn't do any work on the 4312s, I guess I got to know them with grilles, however I became intimately familiar with the others without grilles.