No internal amp isnt a big deal. What speakers are you gunna power with a HU amp anyways? Hopefully not your front stage, maybe rear fill or a set of tweeters...
That number is probably peak watts or max power which is a useless number. You want to look at the RMS output info. I think your definitely ok with 4 gauge and the whole CEA ratings are still a joke considering the process the follow to get that number. Using test tones isn't very effective to...
Hey now! Your talking bout my home town's company! Arc Audio is straight outta Modesto CA. However you might think the amp looks is irrelevant to how it sounds bro. I'm just messin wit cha anyways!