Using two Luxman integrated amplifiers together

I don't see a problem, plus you could try it both ways (SS pre/tube power - tube pre/SS power).

When using the tube preamp section be certain to turn the tube amp on first before turning the SS amp on (reverse this when powering down the units).

The combo's should not waste much, if any, energy VS using them as stand alone units as you will only be using the power amp section of one unit @ a time.

DeKay

As the others say try it you own both components so nothing to lose. Curios myself which combo will sound best.

It will.sound good! L380 is awesome musical.tube pre and imtegrated.

May I ask how does the Harbeth M30.2 XD compare to the Dynaudio Heritage Special? Which one do you like better? I would expect the Heritage Specials to have better bass and dynamics than the 30.2 XD but which one has a higher involvement factor with better refinement and detail?

Harbeth is one of the best with human voice reproduction. Are the Dynaudio HS capable of matching the Harbeth in this area?

@ryder 

im trying to find the time to do a comparison between the two amps and the two speakers but I’m working too much.

actually the Harbeth sounds the best to me paired with a  musical fidelity 6si amp I have but the Luxmans tone controls let me tweek the sound to my taste. The Harbeth may be a little brighter and with some songs I prefer the Harbeth over the Dynaudio. There’s just something special about the DynaudioHS that lets me just enjoy the music though. 
Initial impression is that I don’t notice a difference with the two amps together vs separately. But it’s kind of fun to explore.