Luxman Integrated - What do they sound like

I have the 509x. it replaced a Parasound Halo "Hint". I can only compare it to the HINT.  Caveat: I am not an analytical listener and haven't owned many high end amps.

In my room, with my ears it was an improvement. I hear better bass, improved soundstage and  it makes music more enjoyable for me. I'd say it has compelling dynamics while imparting more of a mellow flow to the music (if that makes sense).

In days of old, they made a real cool hybrid unit.  

The comparisons to Parasound are a big help. I owned A23s for a while (2 amps) and I can't hear a difference between that and my current amps (ICEpower 250 ASP).

Listened for an hour to HD-streamed/DAC at the NY show and was impressed. Detailed, sweet, delicate and very musical. 
https://twitteringmachines.com/ny-audio-show-2018-the-rooms-part-1/

I’ll give this a try after owning a 590AII with Verity speakers and a 550AX with Devore speakers.
Warm side of neutral, bit of golden hue to the music.
Very clean and clear at low and mid volumes but not the best at higher volumes. I always detected a bit of energy at high levels that made things a bit bright. Some would say grand and welcomed but I think a little harsh. Not the case with the 600a or 800a.
Not the black background you would get from Pass or SPEC amp but again this was a higher volume issue for me. Wasn’t room feedback because it wasn’t there with other amps. They got a little flat at high volume (les dynamic).
More body than Ayre AX7e, less dynamic, smoother, a little less black background that Ayre is known for. Less etched than Simaudio intergrated I owned I5.3. Not dull or too full sounding like Plinius 9200. More vibrant and musical than Mac 6300 and 6500.
Closer to a tube character than any of the above mentioned. Soundstage more "live" than above.
Great build quality and loads of features.
Not too hot running. Great WAF.