D
Deleted member 46664
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I would never buy an amp with a large external power brick for anything but junk use. I can't imagine this type of external power design being accepted as "State of the Art"? As most of us can't hear a difference between 95 and 120 SINAD it doesn't make much sense to consider the LA90 when the Buckeye NC502MP offers 10x the power for less money.
A listening test between the NC502MP, Purifi and LA90 would be interesting. But it would take a lot for me to accept an external power brick.
I'd bet that one of the ways they got these amazing numbers was by removing the power supply from the amplifier's casings.
It moves all the AC hum, rectifier and switching noise out of the amplifier.