Hi Maxx!

I don't understand well your question... i think you have a little confusion...

Let's see. Summing mixers work at line levels, and any external fx/or eq or compressor also work at line levels. They all should match their input and output levels to maximize headroom.

The summing mixer i'm building has a master insert send/return, wher you can hook up your comp/eq..etc... just set up properly their input and output levels.

Microphones need a preamp to amplify their weak output signals, and bring them to unity gain and then record them in your DAW.


Another question is settting up the gain levels for final summing. This is a good thread to understand how to setup levels of a mixer depending an the number of channels going to the mix.:

Noise & Headroom in Mixers.


I don't know if i answered well your question, but i expect i put some more light.

JAY X