I just did a quick search to see what amps double down and found the following do , Ayre , Classe , Edge ,luxman , Marantz , Simaudio , Tenor and some Levinson and Parasound , probably lots of others . As others above have said I don't think that aspect is very important , even in a large room and at lease braking levels .
Why Don't We See More High Current Electronics?
It seems that in looking around for amplifiers and integrated amps that double their power as the impedance is halved (high current), they seem to be in a minority. Is it just more costly to build good-sounding high current electronics and the market demand for them just isn't there, or what?