I think you're ignoring the obvious, and trying to over-complicate things,
Mullet1215.
First, use high-quality cables, from a reliable live sound manufacturer. If building them yourself, make sure you're following all correct solder techniques. Also be sure to use the highest quality cable and connectors you can afford. I'm not saying the connectors have to be gold-plated or that the cable has to be Monster, just that the parts shouldn't be coming from
El Shacko de Radio.

Lastly, invest in a good cable tester, such as
this, or
this, and be sure to thoroughly wiggle, twist, and abuse the wires while testing. (Ya know, like a muzoid will

.)
Stop by the
New Member Board and start a thread introducing yourself. We like to know as much as possible about our members.