[sdiy] Ferrite beads or 10ohms resistors in series with +/-15vdc ??

[Jean-Pierre Desrochers]

Hi list,

Browsing a lot of DIY module schematics all around the net
I noticed some builders use ferrite beads in series with their bipolar supply lines
coming to the PCboard. Some other use 1/4w 10ohms resistors the same way.
That makes me wonder.. 
I'm on the making of a MIDI2DAC 6 voices polyphonic module using +/-15vdc and a separate 5vdc
supplies for digital stuff. I started using 10ohms resistors in series with my 15vdc lines
but rapidly found that these dropped my actual 15vdc voltage too much..
I'm using 12 X 12bits DAC's here, a douzen of opamps  and don't want to disturb my 1v/oct outputs
because of not stable supply voltages..
So I changed the 2 resistors for 2 ferrite beads instead
and now my 15vdc supply lines are precises but do I get
a good noise barrier still compared to 10ohms resistors ?

Your thoughts welcome.
JP