I am running 12 gauge for four speakers wire in parallel as two pair. I did this to get a 2 ohm load for my amp. You have to be careful wiring things in parrallel and series because you change the load(ohms).
OK you can do it by running 2 sets up speaker wires. You need to divied it up into 2 sets of 3 speakers. 2 speakers in series (4ohm+4ohm=8ohm) and then the other speaker in series with the others (8ohm in series with a 4ohm speaker =2.6 ohm load perside. so as long as you have a 2 ohm stable amp it would be 2.6 a side. clear as MUD!!