Here's a quick peek to the wiring:
Stinger 8000 series 2ch wire(20ft). The focal mono receives signal from 80prs via this.
4ch Focal Elite ER-5 interconnects for the other amps. Compared to Stinger, I love the build quality of focal:
No, I won't claim installing high end RCAs make a day & night difference over mid-tier products unless one uses home made interconnects with cheap jacks & wire from the local hardware store. However, I'd recommend investing in renowned & quality items since these can be part of one time sourcing only. Do it right, the first time I say.