Wiring help......

You should first check on your amplifier specifications and see how low ohm load is it capable. And next Subwoofer Wiring Diagrams
Thanks for the info

The only reason I'm asking, is this guy (who did systems back in the 90s) is telling me I'll need another brz1700 to run these subs right, but after looking at the sub dio that came with the amp, I can run this amp @ 2ohm load and run the subs parallel and I would be splitting the 1200 watts from the amp between both voice coils right?

 
The big 3 upgrade is basically a routine upgrade many do to help better their electrical output. It consists of three cables being upgraded under the hood. Some will install the big 3 as well as upgrading their alternator to increase amperage and current flow. The big 3 and alternator upgrade will allow you to charge larger / more batteries and from what I've personally found, help charge the electrical system a tad bit faster. I personally had bad headlight dimming and voltage drop. I upgraded my alternator and big 3 - now I have 0 electrical problems.

The big 3 consists of running true 0 gauge in three locations: from (+) post on batter to (+) post on alternator, (-) post on battery to stock ground location, (-) post on battery to many times the alternator rack.

There are many youtube videos to help. Oh and as the wiring goes, wire those subs up to a 1 ohm load.

 
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