Considering Gryphon Diablo 300 "OR" Simaudio 700iv2 ???

Hi, 
I have PMC fact 12 and recently bought Gryphon Diablo 300 for them. I heard Pmc ib2i and mb2se several times so I know the sound is bigger from these speakers than from the fact 12, tonally they are similar.
Before I decided to buy Diablo 300 I audutioned and directly or indirectly (different rooms) compared with it the following amplifiers:
Vitus ri100 
Avid sigsum
T+A pa3100
Luxman l509x 
Luxman m900u plus c700u 
Sugden ia4
Leema Tucana 2 Anniversary 
Bryston pre plus 4b3 and 7bsst2
Musical fidelity nu Vista 800 
Ayre ax5
Mark Levinson 585
McIntosh ma8000

Gryphon made sound twice as big as any other amplifier. It was like live music, bas was fantastic, overall presentation was natural but it was not cold, I would say there is a touch of warmth in diablo. Soundstage was trully 3D. Much better than with any other amplifiers. And the control was as good as it gets.

Gryphon outperformed all other amplifiers by miles except luxman m900u combo. This was a fantastic sound. Much warner, full bodied, but not as "real", big and controlled. Gryphon played all kind of music with ease and at least fantastic if not perfect.

I think a lot depends on personal preferences. 

3rd place for luxman l509x. This is true value for money amplifier. 

Wow Audiotroy... Your statement is also fascinating, but not factual :) I may be new to this forum but surely not new to audio. 
 
I think except ma8000 every other amplifier I mentioned was audutioned in the same room with my white fact 12 speakers or with fact 12 provided by a dealer. You can see this on the yt video below. Bold guy is me :) amifiers are all over the room.

I also audutioned many of them in different places with different cd Player and cables. Therefore, I think based on this I can easilly judge what is better and what worse. Of course for me. 

Regarding some amplification being in a different league... Only Tucana, sugden and luxman l509x were considerably cheaper. I had Tucana 2 in my home system for 2-3 years therefore I made comparison and it was my starting point. 
Luxnan m900 pre plus power £22,000 with c700 £17,000
BRYSTON 7bsst2 plus pre approx £15,00.
Ayre Ax5 £14,800 (not like you said $5000 cheaper) 
T+A 3100 £14,800
Diablo 300 £13,600
Avid £13,000
Mark levinson 585 £12,000
McIntosh ma8000 was £11,000, ma9000 £12,600
BRYSTON 4b3 plus pre approx £10,000
Nu Vista 800 £8,800, but in Poland £11,000! 
Luxman l509x £8,500
Sugden ia4 £5000
Tucana 2 anniversary £5000
 
Therefore, out of 7 amplifiers we went down to 3... I think you should take into the account different prices in different cuntries before you make a statement, because pricewise gryphon was in the middle of the group I auditioned.

I don't understandard your way of thinking when saying vitus is in a different league than Mark levinson or ayre. Actualy ML and especially ayre are more expensive than Vitus here so they may not be in the same league sonically, but pricewise the same. 

Thanks 

https://youtu.be/fVR0Gkjim18

Audiotroy... It is an audio forum not a Police station... To answer shortly: All tests were carried out to ISO and EN standards :)

T+A pa3100- nice amplifier, but too polite for me. Nowhere near the dynamics and control when compared with diablo. Low end was much worse.

Vitus-again nice amplifier, but not as natural, controlled and dynamic as diablo.
Both had much worse soundstage too. 

Fact 12 are quite difficult to run, 84db and transmission line will test the best amplification out there.

If tested on a highly efficient speakers it is likely the differences between diablo and other amplifiers would be smaller.

But don't we want an amplifier which can run any speakers on this level?

Thanks