I bought 6sn7’s from Brent Jessee for my Cayin Integrated Amp. I always test new tubes when I receive them, they were good.
http://www.audiotubes.com/12ax7.htm
I did not like their sound.
He had me wait and listen after breaking them in (60 hrs), and if I still didn’t like them, return/exchange them. I paid shipping, bought less expensive tubes, they sound terrific, and got a full refund for the originals.
Make your best guess, buy from Brent, see if they sound good, Oh Happy Day, if not, try another.
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Do you have a tube tester?
they give you good clues, and confidence in existing and new ’matched’ tube sets. find problems, find non-problematic but weak(er) ones ..... I test all tubes annually prior to Thanksgiving, ready for the Holidays. They last a longgggggggg time.
My simple tester always agrees with my big one, I don’t bother with the big one any more. All 17 tubes of my McIntosh mx110z’s tuner/preamp tested good here. Audio Classics overhauled it, they didn’t replace any tubes, (surprising from past experience with others). That gives you more confidence in them as well as my tester.
http://www.audiotubes.com/12ax7.htm
I did not like their sound.
He had me wait and listen after breaking them in (60 hrs), and if I still didn’t like them, return/exchange them. I paid shipping, bought less expensive tubes, they sound terrific, and got a full refund for the originals.
Make your best guess, buy from Brent, see if they sound good, Oh Happy Day, if not, try another.
..................................................
Do you have a tube tester?
they give you good clues, and confidence in existing and new ’matched’ tube sets. find problems, find non-problematic but weak(er) ones ..... I test all tubes annually prior to Thanksgiving, ready for the Holidays. They last a longgggggggg time.
My simple tester always agrees with my big one, I don’t bother with the big one any more. All 17 tubes of my McIntosh mx110z’s tuner/preamp tested good here. Audio Classics overhauled it, they didn’t replace any tubes, (surprising from past experience with others). That gives you more confidence in them as well as my tester.