Sound System installation help

Alright, so I have picked out speakers, an amp, a sub, and a sub box. I think the speakers come with wiring, so other than that, what else do I need? The pictures below are of what I bought... I really need help! I have not purchased the sub yet, so it is not in the pics, but I will be buying it today so I need to know what else I will need while I am out. Thanks so much!

 

If you plan on using the factory HU you'll need a LOC (Line Out Converter). This will allow your stock HU to interface with the amps.

For the sub you'll need amp/box/power wire kit.

 

Also, why you buying 2 sets of components ?
Another things is what are you paying for these and off what website ?