i just like to use the biggest wire that can fit in the terminal. 8 ga seems to be it for most push terminals on subs i have, so i use 8 ga. also its nice and chunky, it looks nicer than some dinky little shit. if you dont like having muliple conductors for each speaker, buy some techflex and some heatshrink and make it look even more pretty. the only problem i have found is if you like to run spades or for some reason banana connectors, its harder to find some that will fit 8 ga. most take 10 or 12 ga. hope that helps...