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"?
I just put a pair of NOS Brimar's in my power amp. They replaced a pair of black plate RCA's. I was really surprised at how much better they sounded across the board.
Pmboyd : I can say that the 12bh7a Sylvania works best for me..Its a matter of system synergy..The 12bh7a Sylvanias I use were purchased at Tube World and they usually have a few versions..I use the Yellow Print...listed as .."Pinch Plates".. They vary from $70 per pair to about $100 pair depending on which yellow print you buy.....These are neutral sounding and if you need warmth you will have to go to another tube...Possibly RCA Grey Plates..Wish I could give you a more difinitive answer but its a crapshoot..The only way to know for sure is try one and go from there......Good Luck........
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