Sylvania-Baldwin green label circa 1960’s is a nice sounding 12AX7. They can be had on ebay at reasonable prices!
Preamp tube
Looking for suggestions. I’m considering changing the 12AX7 preamp tubes in my Jolida 1000. Right now I’m using Genalex Hold Lion 12AX7/ECC83. Any suggestions and sonic benefits. Thank you in advance.