Hi,
To get these speakers I contacted a local dealer back in January, a business that's actually more focused on mastering but also resells D&D speakers for non-professional hifi use. As soon as the speakers arrived, I went to their place for a listening session, and left with them right then and there
I'm getting back to you with more interesting news, because I finally gave in and set up my speakers as best I could ! I'm attaching a photo. I'm not a professional, so please only read this as an humble, enthousiastic, first impression.
They sound fantastic, the app is very well designed, and a microphone is supplied with the speakers, allowing you to perform the room matching directly from your phone. That said, the available options and graphs are simplified compared to REW. Repeating the measurements with the microphone shows reliable readings and familiar room modes. The stereo image was pulled toward the left speaker. It's possible to mute each speaker via the app, and the right one is MUCH weaker than the left, with very little bass presence. So I swapped the two speakers and redid the room matching: the one that was previously loud now plays quietly. So, both speakers work perfectly, haha! That said, I would have liked the option to slightly increase the gain of the right speaker, but I haven't found a way to do that so far. I had noticed exaggerated upper mids when I auditioned them at the showroom, but the salesman told me he had boosted that range himself and showed me the app. I don't hear that at home, but the app lets you create as many presets as you like.
* Just to keep you posted, I've been in direct contact with Martijn during the day. Thank you for this quality of customer service, I have no doubt the situation will be resolved soon!