Experience on replacing capacitors of SS preamp?

First, the preamp is old, second there is an audible hum even at the lowest volume.
Also, I’ve read many glorious stories of old preamps sounding much better after recaps, so I want to give a try by myself.
There are only 4 caps with + signs, so replacing 4 would be relatively simple, I hope.
Is Nichicon a good brand?
Any other recommendations for hifi audio grade capacitors?
thx

Audio grade is not usually what you want in a power supply. :)

But Nichicon makes excellent caps. 4 sounds about right.

Oops, I forgot you said it was SS. Typical volts in SS gear is 30 or less, you should be fine.

Another good line is the Panasonic FM line. If you can findd them in your values, they are kind of limited in sizes.