I have dual monobloc Push Pull 2A3/45 amp from Vu using vintage Chicago transformers. I use it to drive various Spendors (SP100's, S3/5's ) and Soliloquys 5.3 and SMA 2A3's with tremendous success and even my Quad ESL 63's. It is sweeter and more dynamic than any SS or SET I have tried including my Korneff 2A3/45 which can get close on high effeciency speakers or horns. The Sophia 2A3 and 45 mesh plates sound the best in it next to vintage RCA 2A3's. If the sophia 300B's are as good as their mesh plate 45's I would suggest trying them.
