Buy 12ax7 tube

Adding a power strip is an upgrade over your previous setup. Your system may not be revealing enough to notice a change in SQ, but your components are now getting better current delivery.

RCA makes great tubes, all provide a lush, liquid midrange and clear highs.
But you may be in need of a more neutral tube.

Hi..i found this tube for 20$

I want to know is it original?

https://drive.google.com/file/d/1GDYl5h2hOR3SwxyiBlEIMcDKVqerONH_/view?usp=drivesdk

https://drive.google.com/file/d/1-zm3EtQpsraJdpqIOm5Wic2_-gVlC4nB/view?usp=drivesdk

I also found some jg 5751,trigon,zaeux And cei that i like to know what are they

All of them arround 20$

What about this one?!
https://drive.google.com/file/d/1Y_ZxGf1tJqSGpikc3ym3JhLfUob389u-/view?usp=drivesdk

*zaerix cv492(not zaeux)

What is this?!
https://drive.google.com/file/d/1SxRg18P1ipUnBRWOjlHb0pC-gC1aVMfG/view?usp=drivesdk