Yingtonggao,
You stated "But the AMR's naturalness and delicacy in midrange is really something special." This is exactly what I found with the NAD M51. I would classify it as very musical -- more musical that the AMR in my system. And the NAD M51 has no design issues. Regarding musicality, much is system dependent, IMO.
You stated "But the AMR's naturalness and delicacy in midrange is really something special." This is exactly what I found with the NAD M51. I would classify it as very musical -- more musical that the AMR in my system. And the NAD M51 has no design issues. Regarding musicality, much is system dependent, IMO.