Sugden Class A Amplifiers
A21, A51, C51
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Reviewed Apr 02nd, 2016 by bob59
A21 is a great amplifier and in my opinion is better than the A21a. I have had both and compared them. The only benefit of the A21a is the increase in power but if you listen at lower volume levels I think the A21 is more detailed and has a better phono stage.