"Best" 12BH7/A tubes?

What is the sound character of the various 12BH7 and 12BH7 tubes? Different manufacturers, different dates, different construction types... How would you rank them in "quality"?

pmboyd11-20-2011 9:39pm

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yogiboy Details Discussions Posts This discussion Message User 5,509 posts 11-27-2011 at 11:32pm Copy Comment URL Report Comment Edit Delete FYI: Any 12au7 can be used as a replacement for a 12bh7.
casouza Details Discussions Posts This discussion Message User 239 posts 11-30-2011 at 12:50am Copy Comment URL Report Comment Edit Delete Yogiboy 12AU7 is pin-compatible with 12BH7 but not equivalent. For example, if the 12BH7 is used as a driver tube, a 12AU7 will not do. Best wishes
thorman Details Discussions Posts This discussion Message User 1,262 posts 11-30-2011 at 12:14pm Copy Comment URL Report Comment Edit Delete Just for info ,I tried the RCA 12au7 Cleartops in place of the Sylvania 12bh7a's ( Thor Audio Monoblocks ) and found the RCA 12au7 Cleartops to be Darker and more muted and didn't sonically work well in the 12bh7a position for me.......The Cleartops had good pace,but lacked the openness and transparency of the Sylvania 12bh7a's.....

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