Great set of 12BH7 reviews here
Great replacement for any tube in 12a?7 family if your amp can handle increase heater current (600 mA )
CBS 12BH7 Black Plates
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Author Archives: tubemaze
RCA 5963 Black Plates
“A really fine blackplate from the 1950s, many audiophiles feel these outperform most of the other NOS 12AU7 tubes. Ranked on par with the European brands! “ Read
“Smooth and sweet, but bargain prices. Not side getter, but still has that great RCA sweet and smooth sound.” Read
“very smooth tube with no weaknesses. Very good top to bottom” Read
Continue readingRCA 5751 Black Plates Triple Mica
“These are old and fine 1950s vintage blackplates, quality on par with the blackplate RCA 12AX7 tubes, and are excellent, sweet sounding subs for the hard-to-find 12AX7. 3 mica spacers with extra side support rods, and the distinctive square getter all add up to vintage quality that will never be made again.” Read
“These are probably the best for Pink Floyd. I hate them for heavy metal though, it sounds muffled. The vocals and highs aren’t really as dynamic as with the Raytheon. Altogether, this is a nice tube for the money. It certainly beats up a lot of others I have experienced.” Read
“The RCA has a nice big and wet bass. It has a rich and creamy midrange which controls sibilants well. On the downside, brass lacks bite and dynamically, this tube sounds a little bit slow.” Read
Raytheon 6414 Black Plates
“An industrial, computer rated dual triode… This tube is also like a 12AV7 and will work wonders in any 12AT7 spot, and may be just the ticket if you want to boost the gain of a 12AU7 circuit” Read
“6414’s are still used by MANLEY in some of their tube pro (studio) gear and also in some VTL amps, thus this tube should have some audio merits. Certainly worth a try.”