I assume your talking about the new Axiom flat wires? They should work just fine technically as 12 gauge is 12 gauge. I think if you paint over them they would be hardly noticable.

From the product page.

2. Axiom Flat Wire can be painted, spackled & painted, layed under carpet, under floor tiles & even wallpapered over.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85