JohnK is right (even down to the link I was just about to post); you can get away with less than 12 ga. wire. (Keep in mind that you're driving a 6 ohm load with the QS8s.) But given that you've taken the time and effort to post here, I'm assuming you're like the vast majority of us and don't want to be cutting it close to save a few bucks. 100' of the Sound King 16 ga. wire is $24.50 and 100' of their 16 ga. is $35.90 at Parts Express. I like to save money as much as the next guy, but franklyb with an $11 difference over 100' of wiring, I'd err on the side of caution. Go with the 12 ga. and you can rest assured that you'll be fine.
