I'm finding this to be true as well. I recently switched out some bookshelf speakers for big horn tweeters in my system. We're talking 800Hz and up. The narrower dispersion on the horns had a surprising effect of making the room sound more lively and airy than the wider dispersion speakers, and this worked very well towards low level listening. I was amazed at how enjoyable and dynamic the sound continued to be at very low levels. I think it's something to do with direct to reflected ratio being high while maintaining a relatively long reverb tail in the room.
Low level listening
I am interested in everybody's thoughts on speakers on low level listening. Currently I have Tekton Lore's. They are the upgraded model and I like them, but they open to most of the time at a higher volume then I'm comfortable with. Smart me had to much fun listening to live music. " tinnitus". I have ordered Magnapan LRS+ which I auditioned at my home which seemed more articulate at lower volumes. Any other ideas would be appreciated. Speakers or cures ? Just kidding about cures.