My original NOS Gold Monarch KT88 were slightly less extended in the highs and had slightly more round midrange than the Shuguang tubes I tried at the same time. In my VAC Phi 110/110, I preferred the stock VAC tubes (I believe manufactured by Shuguang) because they were more open sounding, IMO. But, it comes down to personal preference. One thing is certain, the Genelex would far outlast the Shuguang.
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