Elco Nichicon KX vs MKP

[ervinl]

Hi,

I would like to upgrade the PSU of my simple AF tube pre amp.
I consider to use MKP or PIO instead of Elco.

Will I get better sound with 2x47 uF MKP in parallel (such us Solen or Jantzen Cross Caps) compared to Elco of Nichicon KX?

I use choke filter.

If I choose MKP, how should I arrange the placement, higher uF one right after dioda or tube rect (with some max uF limitation, usually around 50), or place higher uF of caps after choke?

If I add some PIO for bypass, which value is recommended, and in which position, before choke, after choke, or both?

Thanks,

Ervin L