question regarding 12au7 tubes


I needed 2 12au7 tubes for my preamp and so went to a local tube store and told them what I needed.

He sold me 2 tubes and even though they arent 2 RCA's or 2 Amperex , but one of each and the specs, all the insides are the same and they test the same, are they still considered a matched pair ?

I have listened to them and notice no difference.
riley804

Showing 1 response by apachef1

So where is this tube store and do they do credit card & mail order over the phone?