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Gryphon vs Luxman vs Accuphase

Thinking that I may bite the bullet this year and get into a Gryphon Diablo 300 but before I consider shelling out that much, wanted to get some input from any of you that have heard this amp in comparison to Luxman or Accuphase. The 509X from Luxman costs half that of the Gryphon and is more within reach. The Accuphase E650 is not that far off the Diablo 300 pricing. IF the Gryphon is better in your mind, curious to hear whether you think the Luxman or Accuphase come close?

It sounds like all 3 have rave reviews. One is a class A while the other two are Class A/B. 
freesole
builder3
763 posts
 
freesole, I own the L-590AX, which is the previous version of the newer L-590AXII. It’s actually greginnh’s old amp, which I essentially lucked into. I absolutely love it, but haven’t heard either the MarkII, or the new 509. The newer MarkII series had the output stage beefed up, I believe.
greg has owned two of those, and heard all three, if I'm not mistaken.
respected_ent
190 posts
 
I have not heard the 509.  I believe @greginnh has heard both the 509 and the 590, so he would know.  Since 509 is newer, it should theoretically be better than the 590, but again, 590 has the class A magic.  
denon1
345 posts
 

Freesole, I had luxman 509x that drove the canton 3x reference speakers. I did not like the sound at all. No decay, analytical, flat. Guess what speakers cables I had with it - wireworld silver 8 eclipse.

Once I changed the speaker cables to triode wire labs this integrated became a different animal - dynamic, focused with good 3d image. I still had to sell it because on a higher than medium sound levels it sounded restrained and less musical.

atownkeep
19 posts
 
I will agree with Denon. I felt at moderate listening levels that the 509x was top of the line. However when you want to crank it up it just didn't dig and put ooomph behind the music. JMOT
freesole OP
159 posts
 
@denon1 interesting notes regarding your experience. Surprised to hear that big a difference was due to the cable when the Silver Eclipse has great reviews elsewhere. It really does all come down to system synergy. My speaker cables are Clear Day Double Shotguns (silver) but also have a pair of Audio Art SC-5SE's as well. 

Regarding sound from medium to higher volumes, that is interesting feedback. First that I have read that the 509x couldn't bring musicality or dynamics in that range. 
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