John, IMO, double blind listening only needs to happen to ascertain which one prefers; and as they, or myself were only interested in any auditory differences, a simple switching back and forth just to see if there is a difference was all that is needed and in my case, in my room, with my 3808 vs the Axiom amp the difference was noticeable even at the same SPL readings. I even went so far as to have the meter mounted on the tripod beside me and I would adjust the volume to match while playing through the songs, I still had deeper bass output and wider taller soundstage with the Axiom amp than my 3808 alone.
Mel is running the Denon seperates which are with out a doubt worth more then my 3808 and as they were unable to notice the difference I am willing to bet it has a similar output level/sound quality as the Axiom amp, unfortunately for me my 3808 does not.
