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My question isnt which will get louder. I already know that (2) 15's will hit louder because of more cone area. But would getting a single 18 be any advantage over getting 2 15's. Soundwise. I dont want to hear "less wiring"......

Using sealed boxes. Would a single FiQ18 in 7 cubes or (2) FiQ15's in 2.6 cubes each hit the deepest?

For my electrical. I plan on getting a 180 amp alternator (120 idle). Big 3 Upgrade. And 2 yellowtops. I plan on still using the zx1500.1 for my amp. I just calculated that i can have a single 18 with around 7 cubes sealed. So yea im pretty excited. Im gonna upload pics as soon as I have progress on my stuff. Long hours at work keep me doing anything massive

The ZX1500.1 is probably a bit too much for the Q even with the BP option. I'd say it's more of a BL amp. It's not that you can't use it on one, just make sure you don't set the gain for max power other wise you'll be adding a recone kit to your list of things to buy. I say that because i own a 15" Q with BP option right now that i'm running off of a Kicker KX1200.1 and it's happy. So happy in fact that i wouldn't put anymore power to it than i have now. I like playing it loud and long and have no doubt i'd have fried the thing if i was sending it a few hundred more watts... I wasnt planning on using the gain high or using the bass boost at all. I hear its nothing but bad.

To have a loud LOW end and the SMOOTHEST transient response (not punchy) and DEEP overall which type of box should I get.

If the volume is lower I'm sure I'll hear a LITTLE treble haha. Will a 200 or 180 amp Alternator and 3 yellowtops support 3000 watts?

Ok ill do the battery since thats a WHOLE lot easier. What kind of fuse? 300A with 1/0awg?

My plans are is that I want to get a 180 or 200 amp Iraggi Alternator with a yellowtop under the hood and a yellowtop in the back usng all 1/0 awg wireing. A single 15 in a wedge 2.6 cube sealed box. The Q15 with BP Power and have a Kicker ZX1500.1 amp powering it (1500 watts). Then maybe at the end of summer add a third yellowtop, a second Q15 w/ BP and another Kicker ZX1500.1. Perhaps dynomat so my trunk lid doesnt explode.. Do my plans sound okay?

Hooking up a second battery is something I've never done. Do I run a wire from the starter battery to the secondary battery. Or do i run a wire from my alternator to the secondary battery. What kind of fuse do I use? More than 1 on each end? Thanks

Im sorry if what i said was confusing. I dont know if my system plans are contradicting each other. But 2 15's i beleive would sound good when i have the volume low. But i do want to get loud when i turn it up. Like i said, let me know if my plans are messed up. Im still learning.

Maybe what i said didn't mean to you what it meant to me. You can control how loud the bass is on the head unit. I am definitely not an expert on this stuff and that is why I am a member on this forum. To learn. When i turn the bass up I want to get loud. If that answers your question.

Well there is a bass knob. For daily listening I can turn the bass knob down. But when that knob is up, i want everyone to know that I got a system in my trunk.

Funny

I originally wanted to get 2 15's in a sealed box. Fi Q 15's with 1000 watts to each. Im not gonna be blasting the subs ALL the time. But when i want to get loud i want that capability. Let me know if my plans are contradicting each other. Im open for any oppinions

Not gonna lie I do care about the looks of the sub. The SSA Icon to me looks kinda weird. I couldn't buy that. The Fi's look pretty cool looking. I know I'm gay for putting that into perspective but i want the whole package lol.