LFE/Subwoofer cable in wall?


I want to add two subwoofer wall outlets in the back of my audio room. 

What kind of cable should I use? A local higher end audio company said they use RG6. I was just wondering if this would be the best cable for that. Because it appears as soon as I ask for pricing the install of the LFE/Subwoofer cable to someone the price goes up but if I ask for two RG6 coax cables to be rain to the rear of the room, its not to bad at all. 
todd1010
Oh, yeah, so RG6 is not the appropriate cable for analog audio, so not sure why this was suggested.
So you’re saying run that balanced mic cable indoor the RG6, ok…then it will just need to have a RCA plug in the end?
Assuming this is a balanced line:

https://www.parts-express.com/22-2-Shielded-Mic-Line-Cable-100-ft.-100-246

If at all possible you should run a balanced line to minimize noise.  You might also want to save some money by connecting one subwoofer to the other instead of having 2 cables run.