Hello. I remember asking here in the forum once about the line/instrument inputs of the Babyface Pro being only 470KOhm while for guitars it is often stated you want 1MOhm as this is what the inputs on actual amps usually have. The RME rep responded that it doesn't matter at all and that there would be no tonal differences between either impedance.

I can see now that a revised Babyface Pro FS has been released, and they change the impedance at the line/instrument inputs to 1MOhm. So I wonder if RME discover the lower impedance WAS impeding the tone in some way and thus decided it requires being raised, or that they just did so because they understood people were asking about it, regardless of it affecting the tone?

EDIT: Perhaps I didn't ask on this forum as I can't find that post now, but I remember asking somehwere with someone from RME responding to me.