The new Sophia/Full Music 67SN tubes that are made in China are (IMHO) superior to the many NOS tubes that I have tried in my Atma-Sphere Amps.
These tubes present a wider frequency response and a deeper soundstage.
Although, they are quite pricey at $100 each for a class A rated tube.
So, high quality tubes can be manufactured to perform as good or better than the earlier counterparts.
But, the market for them is small and I don't see that changing.
ozzy
These tubes present a wider frequency response and a deeper soundstage.
Although, they are quite pricey at $100 each for a class A rated tube.
So, high quality tubes can be manufactured to perform as good or better than the earlier counterparts.
But, the market for them is small and I don't see that changing.
ozzy