Gryphon vs Luxman vs Accuphase

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

@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. 

I totally agree that the cables are very important to the system setup.  So is the system synergy.  In my system, I am getting effortless sound from my 590AXII and the rest of the setup.  I have a pair of Von Schweikert Endeavor E-3 Mk2 speakers.

Yes, I love my class A Luxman L-590AXII. Before Luxman, I was using the Hegel H360 and was thinking about upgrading to the Gryphon Diablo 300. I’ve heard the Diablo at the audio show and loved the sound. But thanks to @greginnh for recommending the Luxman to me. I took his advice and got the Luxman without any audition. Now I don’t have much desire to get the Diablo. The Luxman was way better than the Hegel H360. I’ve never heard the Accuphase, but I don’t think you can go wrong with any of the 3 amps.

To respected_ent I am just curious to find out what was about Luxman L-590AXXII that for you was so way better than the Hegel H360; presumably you are referring to sound quality?

stargazer3, Yes, I was referring to the sound quality.  Even though I've owned the Hegel H160 and H360, I did not use their internal DAC because I have a better DAC.  So, the most important thing to me is the sound quality, not the features.  I've also owned several other integrated amps (Vincent SV-236, Plinius Hautonga, Musical Fidelity Nu-Vista 800).  I do think Hegel amps are excellent, but Luxman 590 is just in a different league.  It just does everything better and sounds more refined than the H360.  I may eventually give Diablo 300 a try, but right now I am very satisfied with the Luxman.