Talking about tubes. Imo buying a "very expensive" tube gear should not involve further tube rolling unless it is for a maintenance purpose. The designer should have extensively tested his gear with different tubes to find "the" sound for that equipment. When I hear people say this crazy expensive amp or that very expensive phono has to roll tube to sound excellent I wonder why the crazy money one paid for that equipment didnt already cover for the tubes. I am talking for example a super expensive gear like Kondo Kagura.
Tang![]()
Tango, there are some very good reasons why most manufacturers don’t actually include the very best tubes for their products...and the consumer has to roll tubes to get the best sound. One of the reasons is that the supply of many of the NOS tubes can be spotty. Remembering that the manufacturer has to not only meet demand, but also has to stand behind the product for some amount of warranty, and I think one can see why most tube manufacturers don’t include the NOS and more esoteric tube with their gear as standard.
Add to that the additional cost of the esoteric NOS tube, and I think we have our answer as to why these types of tube are not standard.