Hi So do you sugest change with the originals or others ? Thank you
If the 6N23P-EB (which are in your amp) are past their sell by date / out of spec then I would recommend you replace them with a pair of 6H23N. I have some really superb 6H23N and everyone who has bought a pair has raved about them, they really are THAT good!
Did you buy the V2 secondhand? If so, you have no idea how long the 6N23P-EB have been in service and more likely than not they will be out of specification with regard to emissions etc. A fresh pair is always advisable if you don't know the history of the amp.