Nice to see this as I have a history with A-25s. I didn't own them during the '70s when they sold in large numbers, but a local record store had two pair mounted at angles where the walls met the ceiling at either end of the room. I was always fascinated by the musical pleasures in hearing those whenever I visited that store.
Sometime in the '80s I was between systems when I found a clean pair for a good price. After listening a bit I decided a couple of simple mods might be fun. So I glued in a wood brace inside each sidewall just above the woofer, then removed the metal screen that covered the tweeter. I was pleased with the results and kept them as my main speakers for several months, until a friend pestered me until I sold them to him.
With those memories I came across a 1-owner pair at a garage sale when record shopping. Even had the original shipping cartons! So I bought those, "just in case". That was a few years ago, now I'm thinking of resurrecting them to set up with a large flat screen for movies and concert videos. Reading this post, which I don't remember seeing, encourages me to try that.