codypt

I am also considering just a single 15 BL for price concern because I wont need such a high powered amp. What would be the differences electrical wise if I got the 15 BL instead of 15 BTL?

Well they would both be at 2000 watts rms so I'd try nd get that or right around there. I assume I would use the exact same amp for either one?

I'm looking for a lot of bass. But I don't want to have to upgrade my alternator ha. Also would a 15" btl be louder and sound better than two 12" bl?

One last question. What would be louder and sound better overall, a single 15 btl or two 12 bl? And would the 15 fit a lot easier than the 18? I ask this because two 12 bl would be $550 and one 15 btl is less than $400. And they would take about the same amp..

Ported box for sure. and I dont know what you mean by a run back to place the amp. If you mean where, then probably to the side of or infront of the box.

Alright I guess I'll stick with two 12s. But what box size/design would work well? And what are some good amps to match up with it?

I know man, I appreciate it all. I just dont want to spend a ton more money than I could for similar results. Say for example I go with the 18, the mounting depth is about 10 inches. So I assume its definitely possible to have the sub facing upwards in a box thats about 2' by 3' by 15". My concern would be if it would sound weird facing up instead of out???

Type r is more of a sq sub than say for example kicker... And if I cant get an 18, then Im going to go with two 15s. The main reason I wanted the 18 is cuz I heard one and it banged, and also I would save around $200 on the subs themselves.

Building in the truck would not be a problem at all. The trunk part that opens goes all the way to the glass of the back windshield which is rather strange for a car. The problem of 2 12s would be the cost, for practically the same price I could get an 18 BTL. But I at least want two 15s. I was first thinking of 2 alpine type r 15" but i found out about FI and heard they are better speakers all around. And I do know type r is a more SQ sub than SPL.

I just measured my trunk, its not square, but I measured the most narrow parts. Its about 3 feet wide, 4 feet deep and 20 inches tall. I could easily fit a 12 cubic foot box with room on the sides. I also rounded down. My trunks big, when I say big, I mean i had an 8 person tent in the back not folded up along with two 33 gallon trash bags full of clothes with my friend in there who weighs about 170. (Dont ask why he was in there hahah) Theres also a thing in the middle of my backseat that comes out and would allow instant access to all the air in my car when opened. If im calculating the cubic feet correct, I could easily get over 10 feet which is more than recommended. Hope that helps, and my goal is to have something that bangs hard, while sounding good. And my budget is around $700-$1000.