Go to accessories and then tubes, you will see all tubes for sale. Psvaneaudio has both WE 6SN7 and KT88 advertisements available and if not, just send PM and Joe will add listing for tubes.
Yes, you will notice a deeper and wider sound stage as you approach the 50 hour mark. These tubes just has the ability to capture the very essence of a live performance; other tubes sounds like you are listening to a recording...
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