Wide speakers with a large baffle will work best. To get really close to a back wall check out these...
https://systems.audiogon.com/systems/6257#&gid=1&pid=3
Horns work well too. The importance is to minimize the frequencies going backwards (sound that wraps around the baffle). Horns do this by virtue of directivity and large baffles prevent mid range sound wrapping round the edges of the speaker cabinet.
https://systems.audiogon.com/systems/6257#&gid=1&pid=3
Horns work well too. The importance is to minimize the frequencies going backwards (sound that wraps around the baffle). Horns do this by virtue of directivity and large baffles prevent mid range sound wrapping round the edges of the speaker cabinet.