As an owner of a SHA GOLD pre my self and also using NOS German RCA 7308's I feel that the analytical/brightness problem is possibly cable related or more probably the Sunfire amp. There is nothing soft or tube sounding about Sunfire products that I have heard. They present a very forward thin sound at best, strictly HT, not good for 2 channel. I would suggest looking into a high quality tube amp like a Cary V12i or SS pure class A like an older Threshold SA series.
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