Yup 20-50 they BREAK IN.. LOL. Pulls that are rolls (but broke in) give it a good listen 2 - 4 hours a couple of times before you say "this isn't working". I seen a LOT of valves pulled WAY before they should have been..They have to build a little "SKIN". If your a pin painter, a week, for the graphene to really work..40-100 hours or so..Be patience..
newbee is right on the mark. 24 hours... pretty close there, failures and microphonics, will show their nasty heads.
Regards
newbee is right on the mark. 24 hours... pretty close there, failures and microphonics, will show their nasty heads.
Regards