Are you pairing Tube Preamp/Line Stage with Class D Power Amp?

I for sure was a bit, just a bit, of a Class D naysayer.  I wasn't foolishly so, as I always thought the tech would improve.  I think we are right at that point now. 

Ralph's amp has to sound good. Man, I need an inheritance to keep up with all that I want to try out. 

So, Ralph, since we’ve got you here I gotta ask, how would you compare the sound of your new amp versus your OTL amps?

The distortion signature of the amp is similar to our OTLs in that the 3rd harmonic is most prominent. It is high enough that its able to mask higher ordered harmonics, so it sounds very similar to our OTLs (which was a nice discovery - to find out we were on the right path all along...). In direct comparisons people independently seem to say the same thing- that its a bit more focused (easier to hear into the rear of the sound stage; this is owing to about 2 orders of magnitude less distortion) but otherwise has the same liquid organic midrange and highs. The big difference is how it plays bass, since it behaves as a voltage source while our OTLs are meant to behave as a power source, owing to using little or no feedback. I've been playing a set of the class Ds at home for the last 8 months or so.

I for sure was a bit, just a bit, of a Class D naysayer.  I wasn't foolishly so, as I always thought the tech would improve.  I think we are right at that point now. 

I heard a class D for the first time about 22 years ago. IMO it was a joke. Also IMO it is no longer- they have to be taken seriously. Earlier class D amps gave the tech a bad name just as tube console stereos gave tubes a bad name. There is as much or more variance in the sound of class D amps as there is with tube amps.

FWIW: My experience with class D goes back to PS audio GCC 250, which I still use in my video system, but in my 2 channel audio Ive had several W4S, Emerald Physics 100.2SEs, Audio Alchemy DPA-1 (excellent sound but I need a lot power in my room), PSA M700s (also sounded nice), EVS 1200 which I raved about for a year UNTIL it was replaced with a LSA Voyager 350 GaN amp, which is roughly half the power, but twice as room filling/coupling in my large room. From this experience IMO, GaN is so superior (at least when done right) to conventional class D that it SHOULD have a separate designation. Switching Speed is the juice

not yet but i may, and put yet another set of tubes in front of the amp by going hybrid.  

according to paul mcgowan of PS audio fame tubes sound best at the input section of the amplifier.  

to get this in Class D form means the Rogue Audio Dragon or Medusa.  I am aware of no others.  

The PS Audio BHK amps also have tubes on the input stage but it is not class D. 

Obviously off from the OPs original question yet it may prove a nice combo to pair a quality tube preamp with a class D amp also with input stage tubes.

Cavanti1960...The PS Audio M1200 class d monos use a vacuum tube input...

OP....In the past I paired a Prima Luna Dialogue Premium tube preamp with a pair of Merrill Audio Veritas class d monoblock amps with great results... The tubes mellow some of the hyper detail that class d is known for.