Please critique my first build

[BarakObamaJr666 10+ year member]

Ok, so I am still very fresh to the car audio scene. This will be my first build for my 2007 Nissan Sentra. I have done a little research through the forums and have settled on the things below.

Here is what I have already purchased:

JVC HDR20 head unit (I know its more on the basic side)

AQ1200D Amp

Here is what I plan to buy unless there are any objections:

2 X Sundown Audio SA-12's

Amp installation Kit from Knuconceptz (Which one should i get tho?)

Dash Installation Kit and Wiring Harness

Sound Ordnance Bass Bunker Sealed Box with 1.260cubic feet per chamber

Do you guys think this is a good setup? I'm shooting for mostly SQ but wouldn't mind a little THUMP.

So I have a few questions.

1) The amp i want runs 510X1 @ 4 ohm, 870X1 @ 2 ohm, 1200X1 @ 1 ohm. The subs I want are rated at 600 watts RMS with the option of dual 4 ohm coils or dual 2 ohm coils. Which would be better? Wiring two 4 ohm subs for a 1 ohm load, or two 2 ohms subs at a 2 ohm load?

2) My battery is new and rated at 500 CCA, and my alternator at 110 amps. I do plan on doing the big three when i install all of this stuff. My question is do any of you think I will need to add a battery or upgrade my alternator?

3) What gauge size would you guys recommend to power my amp and subs?

4) Am I missing anything?

Thanks much for helping a newbie out.

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[misfit138 5,000+ posts]

Don't buy that shitty prefab enclosure.

 

[AQHDC3 10+ year member]

Run 1/0, u may have to add a batt check your voltage after u do the big 3. And yes build an enclosure and Don't buy a prefab. Get dual 4s for a final impedance of 1 ohm to get the most out of your amp.

 

[1rockford1 5,000+ posts]

u can go with 1/0 wire if it dont fit well in to the amp just get ablock and then run 2 ga or 4 ga what ever will work best for you

 

[1rockford1 5,000+ posts]

u can do 14 ga for your subs. some will say 12ga