274b is a rectifier made specifically for Audio
The Emmisions lab 274b is a true mesh plate and hand made a fantastic improvement in sound but $275 you power supply needs to be able to handle 3 amps . I use Lundahl transformers in mine. You can also look up thd Emmisions lab 5u4b also $275 just look it up and look at thd build quality this true mesh plates produce a much more 3 Dimensional presentation.
I have used several Mullards ,RCA as well as Shugaung which the preferred series are actually very hood for under $35. Best of luck
The Emmisions lab 274b is a true mesh plate and hand made a fantastic improvement in sound but $275 you power supply needs to be able to handle 3 amps . I use Lundahl transformers in mine. You can also look up thd Emmisions lab 5u4b also $275 just look it up and look at thd build quality this true mesh plates produce a much more 3 Dimensional presentation.
I have used several Mullards ,RCA as well as Shugaung which the preferred series are actually very hood for under $35. Best of luck