TN, it really doesn't matter what they're "called". We shouldn't take labels such as "mass market" or "high end" to mean more than price level. If within its power output capability the amp is audibly flat 20- 20Khz and has inaudibly low noise and distortion(which these days is all available at quite low cost)then the sound is amplified transparently and isn't improved by spending more money. When name plates and pricetags disappear in blind listening tests, so do sound differences.

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Enjoy the music, not the equipment.