I owned the original LS50’s and now own the new Metas. I am really enjoying the new models, for me KEF has addressed the short-comings that bothered me with the originals. The Metas have lost the occasional “brightness “ in the treble without loosing any detail. The bass also seems fuller. This is a bookshelf speaker though, so you can’t expect room rumbling bass below 50 HZ. I have paired the Metas with stereo Rhythmik F12’s to great affect. Seamless integration after much tuning and patience. I also have acoustically treated my room with absorbent panels as well as diffusers. Such is the nature of this hobby/obsession. These new models are not a panacea. The Metas are the next step in the evolution of a classic speaker. With a well planned front end feeding them, ( they demand and reward quality well damped amplification) they can satisfy. They totally disappear and the soundstage really is 3D.They are not