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In Reply to: RE: New production 6550's posted by Michael Samra on March 25, 2014 at 17:31:34
Mike, there has not been enough feedback for us to know yet. I don't think the dust has settled from the separation from Shuguang.
I did speak to a guy that has used the new Psvane 6CA7 grey glass and he was thrilled.
What do you know about the 'Canadian' Fuller tubes?
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I've been using Fuller KT88s for a few years in my Copland CTA-505 with very good results. Previously I've favoured GE 6550s and new production Gold Lions. But the Fuller tubes appear to remain more stable in my amp and sound good. The Copland is hard on output stage tubes.
Notably, the tubes which have the greatest impact on sound in my Copland are the input stage and the phast splitters.
Rich
"Notably, the tubes which have the greatest impact on sound in my Copland are the input stage and the phast splitter."
Same here.
That is true in all amps for the most part because the highest amplification is accomplished in the driver and phase splitter stages and this is why they are the most critical sonically.
Honest amplification is better than excessive 2nd order distortion anytime.
Agreed, and there is usually one particular driver tube that is the catalyst that brings it all together.
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