I have an RME Fireface 800 with servo balanced inputs, I can change output and input from +4 to -10
but cannot change the impedance. How important is it to have the impedance matched??????

I have 24 pedals in total which I wish to connect to my DAW, my analogue modular synth and moogerfooger pedals as one giant modular hybrid. I have had it working but had problems with gain staging and hum with some of the pedals.

RME IN

LINE 10 Kohm
MIC 2 Kohm
INST 470 Kohm

RME OUT

LINE 75 OHM
PHONES 30 OHM

Someone please advise, I do have a Radial re amping and di box but that is just 1 in 1 out…