According to Atma-Sphere, the MA-1's design is much like a pair of single-ended triode amplifiers wired together differentially. The Silver Edition is built on the same circuit concepts, but features a number of enhancements, the most obvious of which is the addition of a 5th driver tube, paralleled in the gain stage for increased bandwidth and lower distortion.

A dual review that includes a review of Coincident Speaker Technology's Partial Eclipse Series II Loudspeaker!