I have a Tascam US 4x4HR which is working very well. Now I need a mixer, too. Thinking about the Behringer X Air series for example to get not just mixing also deesser, limiter, compressor, etc. The question now is that the mixer mostly have also a preamp included and I do not want to "destroy" my great sound quality from the 4x4HR preamp. How does a setup needs to be... Mic >>> 4x4HR >>> mixer >>> Mac Mic >>> mixer >>> 4x4HR >>> Mac ....? What do I need to take care in the setup and what do I need to tace care of in buying the right mixer to not destroay the 4x4HR quality?