Upgrade to sound quality of Dynaudio Heritage speakers

@jmascian @soix - As Soix mentioned, the Gryphon 300 would be an excellent pairing with the Dynaudios. That amp would bring the Heritage speakers to life. Big Time. 

The Benchmark AHB2 would manhandle the dyns. Only question is would you like the combination. Much less expensive ($3500) than a lot of other amps. Hell, you could get two and run them as monos.

E.g.

I’ve had the AHB2 for the past few weeks, and absolutely love it! Paired it with Hyperion HPS-738s and Dynaudio EX34s. Dead quiet, wonderful bass control.

I’ve installed some Neutrik NL2FX connectors on my speaker cables and not sure how much of a difference it makes in comparison to the regular binding posts, but I sure love having the option. It’s a solid connection for sure.

So much impact & clarity for such a small amp. Thinking about picking up another one in the near future to run as monos.
https://forum.audiogon.com/posts/1846179

Pass Labs X series amps?

@jmascian and @woots +1 on the Burmester 032.   I use it paired with Vivid Giya G 3 speakers.  Sophisticated, clear, and true timbre.  Solid state speed, clarity and dynamics with tube like staging, imaging, and treble reproduction.   Used is in the budget.  
If you go for speakers and can get past their aesthetic, there is no better IMHO than the Vivid Giya G3.  Read pro reviews.  All accurately describe their fast, dynamic, dimensional and accurate sound with a liquid and clear treble and midrange, and deep, powerful, detailed and tuneful bass.  

I would echo @bluethinker ’s thoughts particularly with the Gryphon Diablo. I don’t have experience with the Pass Labs INT25 but suspect it’s around the Luxman’s capabilities in driving power. I recently upgraded from the Luxman L-590AXII to the Gryphon Diablo 300 and it’s truly and ear-opening experience for me, and I’m extremely pleased with the result. My Marten Duke 2 speakers aren’t really inefficient as it is high sensitivity when compared to Dynaudio Heritage Special, and I suspect the Dynaudios are even more difficult to drive than the Marten. Get a good reference amp capable of driving the Heritage Special to its full potential and I’m sure you won’t be disappointed.

Let me relate my experience to you and I’ll make it short since I presume your experience or dissatisfaction with your current system, or Pass Labs INT25 mirrors mine as well. At times when music doesn’t sound good to you, lacking detail, dynamics and bass, and you want to hear more of the bass and dynamics. So you turn up the volume in an attempt to hear the dynamics. Sadly, music still doesn’t sound engaging as it still lacks dynamics, and the bass still sounds weak or not satisfying enough. The only difference is music sounds louder but the dynamics are still not present as the overall sound presentation is soft, mushy or unengaging. That will all change when you acquire a competent amp to drive the speakers to their full potential. Although you listen at low to moderate volume levels, everything will sound perfectly balanced. The dynamics, detail, bass and everything it’s all there. It’s a complete and satisfying experience if the speakers are driven to their full potential.

The Gryphon Diablo 300 entirely changed my perception on what a good amp is capable of. I’m sure there are other alternatives out there so pick one which suits your budget and preferences. I’ve tried the Gryphon and to me, it fits my system very well. Before I bought the Gryphon (which comes with the built-in DAC module), the Vitus SIA-025mk2 and SIA-030 were also considered but these amps although used particularly the latter are considerably costlier than the Gryphon Diablo.

Good luck.