I own Quad 57s and have tried and still own many of the highly recommended amps. I have used the Scott 222B, Stromberg Carlson EL 84 amp, Bedini 25/25, Heathkit UA-1s and 2s, as well as an Electrocompaniet AW 70. They all work extremely well with the 57s--it comes down to what sounds best to your ears. My favorites have been the Heathkits,the Stromberg, and the Bedini. Good luck.
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