I am not sure its performance in an enclosed bookshelf but at least this gentleman shows S400 can sing really well in tight space on shelf.
bookshelf speakers that sound good on an enclosed bookshelf
My friend is looking to put a pair of bookshelf speakers on a bookshelf, a built-in on his living room wall with a TV and a fireplace. I’m looking for advice on brands and designs that will actually sound good when placed in the usually not so good enclosed shelf of a bookshelf. Any thoughts on this challenge?