Can one use assymetric wire gauge for speaker cable construction?

I use solid core 14 gauge UP-OCC copper in Teflon. It's perfect for me. You might try it as a control against which to judge yours.

@oldhvymec

Nailed it. Try anything is ​the answer to the OP's query.

That's the only way he can determine if it works for him.

He can try rolled up EMF fabric if he wants to.

@audio_phool  - About 15 years ago, or so, there was an article in The Absolute Sound, where the reviewer made a pair of speaker cables using a 3 wire, 14-gauge outdoor extension cord from The Home Depot. He used 2 of the 3 wires for the + side and the remaining 1 of the 3 wires for the - side. It caused quite a stir back in the day. I built a pair and used them regularly for temporary use in my system. I never terminated them, just used the bare copper ends, so they were not as convenient as my purpose built speaker cables with BFA style low-mass banana plugs.

Yes, you can build an asymmetric cable and it will sound fine. Of course, you could use the same type of extension cord and just use 2 of the 3 conductors and have a symmetric cable.

Thank you guys for your input. I will let you know once I am done with building cable.