Well, couldn't resist picking these behemoths up when they came up for a very reasonable price. First pair of speakers that the wife got on me for! And can you blame her?
They are the 310AP version of the Concert Grand meaning the baffle panel was sold w/o a cabinet that the owner then installed into a wall or other custom build. The date code has these from 1960 so fairly early. They apparently came out of a church a few years ago and it looks like the custom built cabinet was done fairly close to the Bozak plans for them.
There are a few key issues I am going to remedy right aw