I had several amps driving ESL57's over the years including a Bedini 25/25. The best two that I heard were the Levinson ML2 (no suprise) and a Naim 250 with the output reduced internally. I tried a Marantz 8B, Dynaco St70 and MkIV's,Berning EA230 QuadsII, and 303. Make sure you have the protection boards installed and good luck.
