Reminds me of my Peavey Classic 30.
If you ever want to change the speaker I'm assuming that, like the Classic 30, you will have to carefully remove the entire chassis (on a Peavey this involves an extra couple of screws either side). I've done it and besides the awkwardness of removing and reinstalling the chassis (I got my father to lend hand supporting it as I screwed/unscrewed it) it was very simple.