I started out with my Logitech UE Boom in there which under normal circumstances produces a pretty good sound, but with no soft furnishings in a fairly small room it wasn't the best.
I then remembered an old HiFi I had stored in a cupboard, it's way over powered for the room and I don't like cables on show, but it will do for now. Linked with an Alexa it actually works great.
I need to tidy up the cables on the right side as I only had a little cable tidy left over. Probably get Sonos or similar wireless solution in their eventually.