Pioneer M-72 Capacitors

You don't need to get Elna brand capacitors, just get good quality audio grade electrolytic. I use Nichicon, but any good audio cap will do. I personally try to get the largest microfarad replacement capacitors for the power supply filters that will fit. I've not had a problem going 2-3 times higher than the original value, but keep the same voltage.

Pioneer is not that good.
Back then, i had a SONY system.

Back then, Sony and Pioneer pretty much sounded the same as did most receivers at that time. 

@stereo5 

no that is not TRUE! 

i am his wife. and i can tell you the Sony sound was better.

" no that is not TRUE!"

Prove it.

"Back then" Sony wasn't even a competitor in home audio here. Too busy perfecting the Betamax.

Thanks so much for your advice fiesta75!  Sounds like a plan!  I really enjoy this pre/amp combo and I'd like to keep them as true to their original sound as possible.  

Rob, you might check in the Pioneer subforum at Audiokarma. I haven’t looked there in a year or two, but there were some very sharp folks there when it came to repairs, etc.
https://audiokarma.org/forums/index.php?forums/pioneer-audio.90/

Thanks builder3.  There's some good stuff on there!