Why not just swap your MA-6450 for an MA-6850? From what I
can tell it's the exact same unit except with a tube preamp
section. The MA-6450 is a terrific amp. I can't imagine the
MA-6850 would be much of an improvement.
can tell it's the exact same unit except with a tube preamp
section. The MA-6450 is a terrific amp. I can't imagine the
MA-6850 would be much of an improvement.