20.1 s could be driven well with any (decent power delivery) very expensive amp around.
So do not be disappointed with your little amp. keep the speakers, and someday you can power them with the sort of amp and electronics they deserve. THEN you will really enjoy your Magnepan 20.1s.
I use a Bryston 4B-SST2 for my 3.6s.
So do not be disappointed with your little amp. keep the speakers, and someday you can power them with the sort of amp and electronics they deserve. THEN you will really enjoy your Magnepan 20.1s.
I use a Bryston 4B-SST2 for my 3.6s.

