No problem, yes to the beer (or Baijou), been to China many times but never to Taiwan.
Most of the noise will be high frequency, because the PSU is a high frequency switching inductor. For instance your selected +/-15V supply is at 320K or something. When you select the 48V supply, you can see what frequency it switches at... best if it is over 100K. High frequency is good, makes it easier to filter.
The audible effects come when the high frequencies create low order harmonic noise in the audible spectrum in the power rails which the amplifier can't reject. For instance if your supply is running at 120Khz it will make noise at 60Khz, 30Khz, 15Khz, 7Khz, 3.5K and so on, and some places in between, and (Pretty much a chance for harmonics every nth beat...)... so if you filter out everything above say 1K (corner frequency) with a nice steep LC filter you will substantially reduce all the low order harmonics in the audible spectrum and have no effect on the audible spectrum, and you can do that with a light small capacitor and inductor (smaller than a grape).
You probably won't have low frequency noise (because the current draw is light, and the supply will have a reservoir of some kind) but if you do you can put in an additional resistor + reservoir cap (RC filter) which is also low pass but can have a very low corner but can only cut 6dB per octave. But this can be done with a small light resistor and capacitor and can have a corner frequency at 3hZ pretty easily (also smaller than a grape ).
Simplest explanation (missing details)
LC filters can be really steep (dropping much more than 6db per octave), but get big and heavy when they get to lower frequencies.
RC filters are less steep (6dB per octave) and drop some voltage across the resistor with current, but can be small and light and have a lower frequency corner.
Used together you can make the supply quiet, (but as I say you may not have a LF noise problem at all).
Anyway... for a PSU you want the filter to be low pass... (the impossible ideal is to have the supply provide +/-16V and 48V with ripple of 0V regardless of load )
Corner frequency - below the frequency of any significant noise, do HF's (1K...3K...) with LC and if you need it do LF's with an RC filter down low (for example 2.5hZ corner will cut PSU ripple at 20hZ to less than 1/8th of what it was without filtering)
Butterworth..series... shunt... not sure but I suggest something like the pictures below... Place the PSU and LC filter away from (not too close) the audio circuit because HF's can radiate ...
Note: Both these filters work the same way... like a simple RC filter (just think of the inductor as a resistor that has a higher value at high frequency and a lower value at low frequency.... So for DC, the LC filter gets much less voltage drop and is therefore more efficient for PSU low pass filters. But inductors that can resist low frequencies get BIG and HEAVY.... so the RC filter is used to filter LF... but it is less efficient as it causes a voltage drop even at DC.... making heat for no reason)
In lay terms... the resistor by limiting current makes any increase in voltage flow into the capacitor slowly, and the capacitor stores any charge so if the input voltage falls the charge falls slower, so on the output any changes (noise) are reduced in amplitude... Bingo low pass filter.
LC
RC
The bottom is output ground , top is the 48V rail.
And yes... the filter you showed might work, didn't really look at the specs... but we were talking about 48V filtering (the phantom power is the most sensitive supply to noise) and 20Amps will power approximately 4000 average condenser microphones! you only want 4 mic's. You only need something tiny and lightweight for your portable preamp.
How are you planning on putting this together? How big is it? Are you making a circuit board to put the eden's and PSU's on or mounting them to the case and wiring them up? Doing the rest on breadboard?
I would suggest positioning the PSU's and power inlet at one end of the case and the stack of eden's and Audio ports at the other (3 inches apart is 16 times better than 1/2 inch apart, radiation decreases as the square of the distance).
Maybe a metal case for the whole preamp to reduce interference from cell phones etc.
Maybe a steel "wall" or separator shield in the case between the preamps and the PSU, or an internal steel box around the PSU (these may not be needed, don't know how sensitive the Eden is to electronmagnetic interference) because the inductors on switching supplies can radiate electromagnetically (imagine little coils turning on and off 300,000 times per second).
I can't wait to see pics of this little baby.
Again I thought as long as it was under 20A, I'd be fine. 
