Old thread but recently purchased a used demo Gryphon Diablo 120 integrated. I’ve had a pair of Dynaudio Heritage speakers for a few years and have tried pairing them with Luxman, Pass, Rogue, Audio Hungary and Conrad Johnson amps.
Without question, the Gryphon Diablo 120 is far and away the best pairing. While yes, the Dynaudio Heritages will work with lower watt and lower current amps, they don’t really open up in my humble opinion. That said, once driven with a quality high watt and high current amp, I think you see what the designers intended to realize.
The Gryphon and HS are a superlative pairing.