Excellent question... I also have the same need. I am assuming that all rear ported speakers would be a bad choice. I saw on a thread that Rives suggested building a cabinet in the bookshelf around an in wall designed speaker. Makes sense to me.
Best bookshelf speakers for bookshelf placement
What are the best options for bookshelf speakers that are actually going to be used on shelves that flank my fireplace in my listening room? I prefer a transparent sound that allows as much of a soundstage as possible considering the placement restrictions.
thanks
thanks