Hi
I did a quick test, recording white noise from Pro Tools to 2 analog inputs (3&4) on the Nomad. Input 3 was unfiltered while Input 4 had the low pass at 80hz, and a couple of random notches at 400hz and 1Khz. I then put the two tracks together and loaded them into RX5 to look at the Spectrum Analyser. White is the unfiltered track, yellow the filtered/notched track. Interesting that the higher 1Khz notch has more reduction. Anyway, not a thoroughly rigorous scientific test, but useful as a general guide. I hope this helps!
Alistair
Nomad Filter Test.tiff