can't tell ya much, but I have a 2265, great receiver...it's from ~'77 or so, part of the 2238/2245/2252/2265/2285/2330 family of receivers.
A "B" version means redesign, it's not always a good thing, for example a 1060 is better than a 1060B
http://www.classic-audio.com/marantz/2265.html
http://www.classic-audio.com/marantz/2265b.html
Can't say anything about the 2265b but I like my 2265.
It's just the little sister of the 2330 and 2285, I would say. The 2252, 2238, 2216 are cheaper designed inside, although they look pretty much the same outside.
For me, the 2265 is one of the nicest looking Marantz receivers. The proportions are just perfect.
I just put my 2265 back in play. I have been using my model 16 amp with a 3200 pre, but the 2265 just sounds better to me. I feel like it shouldn't given the history of the model 16 and the lofty praise it gets, but the 2265 just sounds better to me
If it sounds better to you, that's all that matters.
The 3200 preamp could be a factor. It might be fun to hook up the "pre outs" of the 2265 into the 16 and see how that sounds.
I was thinking about that, and I find myself "blaming" the 3200 as well. The 16/3200 combo has more bass for sure, but it's kind of "muddy". The 2265 sounds more "clear". Tomorrow I'm gonna try the 2265 as pre theory out.