JBL 4367 is as detailed as the 804D4 in the mids and highs and more detailed in the bass. I find them very enjoyable at whisper volume to rock concert levels. They almost seem immune to volume change. It is a much more refined speakers than the Klispch Cornwall. The box is better, the drivers are MUCH better, the horn is more damped, the frequency response is smooth off axis. If you want more highs at at low volume you can add a bit with the switched in the front.
I am using a Mac MC462. Demoed the whole Klispch line and B&W D4 line on Mac gear. I am also a former owner of B&W, Focal, and Klispch. A friend of mine has corner horns and I would not recommend them to anyone for serious listing. They are more of a novelty speaker imo.