OK I have the Atma-Sphere-D's in my system and have started listening. "Subjective" report out later but for now some pix and a description of my humble system. The system sounds much more complex in words that it actually is.
Speakers: 1) BD-design horns @ 112dB sensitivity (utilizing the BMS-4592ND coaxial compression drivers w/ custom phase plugs) FYI I have a pair of the new Celestion Axi2050 drivers coming mid-Oct to check out). Both the BMS and Clelstion have roughly the same frequency response in my horns of ~300Hz-21kHz. 2) The base cabinets are the BD-design Compact Reference w/ 15" drivers running from 38Hz-800Hz. 3)Not shown in the picture is an SVS-16-Ultra for ~15Hz-40Hz. NOTE: in the pic you will see a sub but that is just part of my JBL soundbar and is only used for TV.
Amplifiers: 1) Coincident Frankenstein Mk-2 300B monoblocks driving the horns (shown sitting in the floor) OR the Atma-Sphere-D's on top of the cabinet where the 300B's normally sit. 2) Crown-XLi-1500 driving the base cabinets utilizing a mini-DSP for xover & volume matching duties.
Preamp: Don Sachs custom
Dac: Holo Audio May-KTE
Streamer: Innous Mini-Mk3 + LPS power supply
Cables: Grover Huffman end to end