I am probably gonna amplifiy factory speakers. It makes sense (if there not broken just give them more juice). I will put subs and two amps. About the folded horn sub- It costs way too much, even though i would love to have one but I am not willing to pay that much for a sub, but thanks, I didnt even know such a thing existed. Thanks you so much.

Benz LGB- How does your car come with factory 10-speakers system. Is it because your in another country(asuming).