I'm certainly no master of hifi, but after looking at the pictures, I'd be more concerned about where your speakers are located than how much heat your amp is putting off.
I would slide those book shelves towards each other so they meet up with the hearth. Put the speakers out into the room in front of the bookshelves. Now you can pull your hifi rack away from the wall farther without it hindering access to the bookshelves. Books are excellent bass traps.
I would slide those book shelves towards each other so they meet up with the hearth. Put the speakers out into the room in front of the bookshelves. Now you can pull your hifi rack away from the wall farther without it hindering access to the bookshelves. Books are excellent bass traps.