I own the Sapphire M3s. Coming from many good speakers including Quad ESL's, the M3's sound as good and better than many costing much more. They give you what you feed them and any changes will be easily heard. Room acoustics I had to work with when I got my Quad ESLs. Dye to radiate sound as strongly from the back as the front, panel does the same. So I was set when mine arrived, the sound is very in-room like you hear from a mic feed. They are not bright but every open like a panel speaker or ESL. They image well and go not just low but low with definition with no bloat or forward base as many speakers have on all songs, they can really go low but then on another track bass will be very laid back, so again they give you what is on the recordings. In this day and age when $15,000 speakers are called a bargain, what Spatial charge vs. sound quality are high value, high-quality sound, and a steal. 40 years in this hobby and this is one of the better speakers I've owned or heard regardless of price.