@essrand congrats on the tdai-3400. Sorry for the delay, I forgot to follow this thread. Yes Neal is a good guy. Since buying my unit, I've referred 2 people to him already that have made Lyngdorf purchases as well.
I'm very happy with my TDAI-3400. It's a very smooth, neutral, and natural sounding presentation (maybe with even a slight touch of warmth). It's a tad less forward and polite sounding than my Benchmark DAC2 HGC/Nord NCORE Class D Monoblock combination, but I feel it's a more accurate portrayal of the music. It posesses excellent detail retrieval, isn't analytical at all, and is non-fatiging to listen to for hours at a time. Very musical indeed!
The Room Perfect did indeed improve the sound quality by evening out the bass response aswell lifting some congestion and obfuscation in the midrange region
Prior to getting Lyngdorf I typically listened to my Art Audio Diavolo SET tube amplifier primarily and it's also currently connected to the preamp output of the Lyngdorf and to a Luxman AS-55 amplifier switcher so I can enjoy tubes when I'm in the mood or directly to the Lyngdorf's internal Class D amplifier when I'm in a different mood or simply want a change of pace. A best of both worlds approach, if you will, however I may very well end using my tube amplifier less and less since the Lyngdorf is quite good on it's own merits, but it's nice to have options and it's a very versatile piece allowing me to create separate Room Perfect profiles for both amps, which is very handy.
I really love using the RoonReady and Spotify Connect feature which works adeptly. It was all very easy to setup and configure through the well thought out web interface and I love the Lyngdorf Remote mobile app and even the ability to control the tdai-3400 volume from within Roon's or Spotify's mobile app as well. Very thoughtfully engineered and nicely executed. Well done!