is it true that Swiss Audio makes the best amps in the world and also are they more powerfull than rockford amps? A guy that has been installing system for 20 yrs told me this . is this true?
You'll need to look elsewhere. Zapco, US amps, Arc Audio amps, McIntosh, are considered to be fantastic amps. Of course there are others, but IMO Swiss Audio doesn't even come close.