I just received my DMS-700 today (upgraded from DMS-550). It didn’t take long to install the specially designed spike feet and the the dedicated Cary DMS-700 phone app. The DMS-700 perfoms great right from the 1st minute it was turned on. After 30 mins of playing my favorite tracks in Tidal and Spotify, in my opinion the DMS-700 outperforms the DMS-550 at least 35% better. I hear more details in the music especially impressed with the enhanced instrument separation. And the effect from percussion instruments are amplified thanks to the more accurate and progressive bass. The AKM4499 chipset is much more smoother than the AKM4493 in the DMS-550. I am so glad that i made the upgrade. The upgrade from DMS-600 to DMS-700 could be subtle though.