Saw someone's status here about the Mysphere 1-week demo, and I figure that I'd start a thread about these. I've always been a big fan of the K1000, and I received a (mostly) finalized 3.2 version in late 2018. See below for my review of the 3.2 and measurements from https://mysphere.at/. The 3.1 is the "portable" version, it sounds almost identical to the 3.2, but a bit less technically strong and can be driven straight out of a portable DAP. I'm still waiting for a chance to get a longer demo session with a 3.1, and when I do I'll update this post.