Mark S. acquired a pair of Grant Fidelity special edition Treasure 6SN7SE top grade with us recently for his Moon Audio Dragon Inspire IHA-1 Tube Headphone Amp. Below is his feedback via email. We hope this will help other headphone amp owners when choosing upgrade 6SN7 tubes!

“Rachel,

Bless your heart! My order of the Globe 6SN7 tubes arrived in just 3 days! _{(seller note: Mark ordered our Express shipping upgrade for extra cost)}

I realize that there is a break in period for the tubes, but they are already better than ANY tubes I have ever used! 

For the first time, my amp has ZERO noise with headphones! I can’t believe it. Also, I have never heard the sound so incredible as it sounds with these tubes!

Thank you so much for your great service and the best tubes I have ever heard!

Very best regards,

Mark”