can i use 12 guage for the front and rear speakers or it that to big?
should i go for 14 guage?

 

It's only too big if you have very little power running, or if you can't run the wires into the doors.

But it is overkill.

 

12 guage JL Audio wire runnin to all my speakers

 

I have 12g for my front (150W/ch), 16g for rear (25w/ch) and 12g for sub (250w).

 

if you got it and you have room to run them..Use them...nothing wrong with a little overkill..

MIke

 

I looked at alternatives a number of years ago (law of physics haven't changed) and the problem is "skin effect" at higher audio frequencies. A cost-effective solution, if it fits in your application, is PC ribbon cable; using maybe 12 conductors (6+, 6-). Thicker single conductors only increase loss ratio between low frequencies and high frequencies.

[Retired Electrical Engineer]

 

Good point. Which is why speaker wires are bundles of small strands and not single core wires.