[codefox1]

Great observation. Acoustic feedback can indeed limit things in close quarters even with old time lathe record players. Even 6 inches of foam above my Altecs will foil me if I put the turntable on top and attempt to loosen my ear wax. So long as it's not the hot tube environment you are blocking out, a piece of masonite, perhaps lined with some foam, aka new air conditioner filter or something like with it would be most proper. Don't know how they handled this in Jukeboxes, but someone must know.