help building splitting psu for audio hardware

Hello,

I'm really basic with electronic, and i need a little help to build up a splitting psu for audio SSL. I need a +25/-25, +17/-17, +5/-5 and 0 volt (as ground). I know how to build a basic splitting psu like +25/-25 and 0. but i don't know how can i make these 3 ways i need. By the way i've 6 SSL, is it possible to have 6 "channels", one for each SSL or i need to build up 6 psu ?

Can someone help me to build it or give me a way to do it...
Ho and i'm in france so i have a 220 volts input.

Thanks a lot

Drath

Depending on the current requirements you would normally regulate the lower rails from the higher one. Using one PSU for all amps, or a number of PSU's, is really down to design choice and cost.

okay, i think i will try first with one psu like this
PSU ----> 25V ---> regulator ---> 17V ----> regulator -----> 5V