Phantom power for CH1 and CH 2 made out of CH4 power.
I have noticed that ch 1 and ch 2 without phantom power enabled doesn't have any hiss when phantom power is enabled on ch4
I was looking for 9V source for my phantom power box, so I don't have to use the 9V bateries and the best source for it is actually pahntom power from the ch4. Once filtered by phantom power power supply circuitry it doesn't produce any hiss.
So the next step was just taking out all content of the phantom power power supply and making the cable as per below diagram.
Once you remove power supply from phatom power box it is what is left:
Looks like you don't need 2 X 47 uF and 100 uF capacitors. Apparently these are already inside the RED audio board.
However .1 uF capacitor 100 Ohm resistor and small inductor coil is a must.
Inductor could be omited if you use 100 ohm resistor made out of wire, not a solid resistive mass.
Otherwise use standard .2mH power supply inductive small coil.
6.8K resistors have to be paired to .05% tolerance if you want very very low noise on good mikes.
If you don't use standard RED mini xlr cable to connect to channel 4, use 600 ohm resistor instead 100 ohm, since RED cable has 600 ohm in series there.
You can connect to any pin on CH4 except of the ground.
This thing may not work if your mike needs more then 4-6 mA.
.1 mF capacitor is ceramic, all others are electrolite 100V. Polarisation of electrolites, plus is facing the +48 V and minus is facing ground or ch 1 and 2 pins.
I managed to put all these components in the large XLR connector on the mike side and I just added one more double wire going to the RED ch4 on top of existing CH1 and CH2 cables. All cables shilded.
So you can make phantom power, power supply out of the +48V supply from the CH 4 RED mike connector.
If you don't have experiance making this type of projects, contact Trewaudio maybe they will make one for you.
Ch4 will have hiss but headphones are set for ch1 and 2 so you don't hear it and you just extract cha 1 and 2 from the proxy files.