Which cable is very good for subwoofer but not too expensive?

Question

I'm using a 2000 watts stereo amp to power 1500 watts passive car subwoofer, mostly to listen to music. I've read here that using RG6 cable is good for the subs but I suggest that RG6 is only for the active subwoofers. Internal AWG of RG6 is 18, and I need at least 14, preferably 12 to keep my subs happy and sound. I was planning to get a usual 12 AWG speaker wire from a local electronics store, which will cost about $1/foot. Is there anything better of the same price range or cheaper of the same quality? Do I even need to bother with getting a shielded wire if the wire will only be up to 20 feet long (yet there are 3 electrical devises close by plus 2 floor speakers of 250 watts each)? Despite the fact that solid copper is tough to bend and run over the room - which is better to use for subwoofer, solid copper or stranded wire? In stranded wires - how many inside strands is better - more or less? What wire material is preferred within reasonable price range? Thank you

The cheaper 'speaker wires' from Home Depot won't do as they chemically react with the insulation and over time turn green. Monster cables are way too overpriced and they're not worth buying for use at my place. Any comments on how to overcome insulation problems or which insulation is better would also be helpful.

Answer 1

Just use heavy gauge cable. Nothing fancy. Basically, the heavier the better, but I wonder why you think you need "at least 14"?

There is no point whatsoever in using co-axial cable or any other kind of shielded cable to feed a passive 'speaker. The impedance of the amplifier/'speaker interface is so low that there is no chance of anything being induced into it, nor is there any risk of it radiating.