I have had 2 MTX (200 RMS) 12's in my car for quite sometime. I blew my amp and was forced to get a new one. I had bought some RF 10's (150 RMS) from a friend, so I decided that I was going to put those in my car as well. I have 750 Watt and 450 watt amps on the way. Should I get 4 gauge wire...