okay so just to update this thread i wanted to add the information for anyone who stumbles across this seeking the same information.
The RNS-510 has an output of 20watts per channel, the fli comp 6 requires at least 40watts per channel.
I'm buying the whole bluetooth harness thingy that fits between the head unit and original loom. im going to modify this harness to have RCA outputs instead of standard speaker wire. i will then use RCA cables to feed an FLI fl800 ampiflier.
I'll be running 4 gauge cable from the battery to a fuse then to a distribution block and 8 gauge cable to the subs amp and speaker amp. as well as 4 gauge from each amp into a distribution block then 4 gauge to the chassis for ground.
Both remote on cables will be tied into one and put into any 12v feed i can find and have a switch on it.
using Y splitters for the subs feed.
