[nature boy]

I just picked up a used Sophia Electric Baby Integrated amplifier for my bedroom system.   

The amp utilizes a quad of output tubes are Russian military 6P1T pentodes, treated by Sophia for low noise. While the 6P1T is similar in dimensions and outward appearance to the EL84 family of tubes, they are not interchangeable due to significant electrical differences. There are also two input/phase splitter tubes are American-made, NOS 5670, medium mu, 9-pin miniature dual triodes.

Any suggestions for NOS tubes to improve the sound quality?  This doesn't appear to be a very available tube, based on my web searches to date.

I am also hopeful someone here at AC may have swapped out a power cord or two and has a recommendation.  I initially plan to use a Volex 17604 cord.

Thanks for your input.

NB

[Scott F.]

I know at one of the GAS Gatherings we operated on Blackmores Baby Sophia. We replaced the coupling caps some standard Sonicaps (Theta's if I remember correctly) and I think we soldered in some bypass caps on the main power supply caps too (cheap Nichicon films).

It sounded like a different amp after we were done. Total cost, maybe $40. Total time, about 20 minutes.

[Blackmore]

That's right, they were Theta caps, but we didn't get around to the bypass; I think it had something to do with "G" dissing your soldering iron, or we ran out of Scotch    I wasn't too thrilled with it before the mod, but now I love that little amp.  The Baby ran my Large Advents at last GAS get together at my house and we all sat back and enjoyed-the-music.  (how's that for a plug, Scott???)

[Scott F.]

....but we didn't get around to the bypass...

Oooou! Something new to modify