If the toroidal transformers are stacked that could explain the disagreement.
By the way, think that the Aragon amp costs more than twice the Adcom price, so it ought to be better.
My Adcom 5503 (like a 5500 but with three channels) is hooked up to Maggies. Although Maggies are often called low impedance speakers, they actually are a very uniform 4 ohms regardless of frequency, which makes them an "easy" load for the power amp. Maybe that's why you can get good results with a less exotic (expensive) amp. (But they do like lots of watts).
By the way, think that the Aragon amp costs more than twice the Adcom price, so it ought to be better.
My Adcom 5503 (like a 5500 but with three channels) is hooked up to Maggies. Although Maggies are often called low impedance speakers, they actually are a very uniform 4 ohms regardless of frequency, which makes them an "easy" load for the power amp. Maybe that's why you can get good results with a less exotic (expensive) amp. (But they do like lots of watts).