04 Corolla 2 zvx 12 on 8k?

[JetskiReese]

I have an 04 Corolla with an rp2000 on 1 zvx12v2 sub. I bought a pretty big dual 12 box tuned to 32hz. The port wraps around the back and is as long as it can before it chokes itself, i had 2 sdrs in it at 1400w but on the lows I could tell they weren't doing what they could have. I bought a zvx and covered one of the holes on the box with 3/4 particle board, liquid nails, and screws. The box was originally designed for 2 vxf subs but this zvx made this box sing down to 23hz. at 27hz my trunk is moving around 3/4 inch with the bass. From 29-40hz it gets deep in my ear and I can see birds flying off of large fields in a circle pattern to my car driving past thats a good 150ft of radius. I also forgot to mention around a month after i started running the zvx I moved the box around and was able to invert the sub and keep functionality of the back seats, it got a good bit louder around 32hz and 22-25hz, a good bit more wind from inverting it. I want to build a box that fills my trunk to the point I only have a few inches to my back seats when they are up (i dont crank when the seats are up one of my seats are already not latching properly and seems to be broken on the inside, having the seats down make it a lot louder) and use an aero port instead of a slot, i understand I can adjust an aero port to fit my liking after I initially build the box. I want to use 2 zvx12s on a taramps 8k since they arent much more expensive than just another rp2k for a second one. I dont know what electrical I would need for an 8k, i have a 900cca agm battery with a big 3 and 2 runs of 4awg to the amp. I think I would need an upgraded alternator because the stock one is 80amps and isnt exactly happy with my 2k. Would I be able to just run a 2nd battery in my spare tire compartment? Im going to move my amps to the spare tire compartment to fit a bigger box. I'm pretty sure 3 runs of 0 awg would be good or 2 2/0 awg runs. I would like to retain my back seats but i am willing to cut a hole in my rear deck for an aero port to stick through. I want to buy an aero port that is sectioned so i can start really low and shorten it until im happy. I got a really big crack on my windshield that hasnt gotten any bigger for a while. It grew 2 feet across my windshield in a day as it flexed but then just stopped, i want this box to finish it off. My corolla has a 1zzfe, has there ever been a dual alternator mount for this engine? Including wires I have around $1200 into my car and I want to put another $2000 into it over the next year or 2. For mids im going to do dual 6.5 pods in each door with a super tweeter and delete the 6x9s. I have a taramps ds440x4 but will likely upgrade to the skar rp150.4 for more power. Any suggestions on where to start or what I need to focus on are greatly appreciated. I dont know if this is what i should do or if I have completely gone the wrong direction and will sink my money into a **** system. I will also be doing a dual 18 build in my convertible starting with rockville dj 18" subs after I get my corolla where I want it. All critiques are welcome I'm a little in over my head on this idea but I know with time it can come to reality.

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[hispls 5,000+ posts]

You're certainly shoveling **** against the tide trying to get loud in a convertible or soft top anything and getting a trunk loud without doing some sort of flat wall is extremely difficult either.

I'm sure you can build a box in the trunk that'll have adequate room for a pair of 12s but you're not going to get 8K out of an 8K amp without significant investment in your electrical system. IMO if you're not ready to just flat wall the thing at the b-pillar you might just leave well enough alone and look for a much larger vehicle next time you buy if getting very loud is a priority for you.

 

[JetskiReese]

You're certainly shoveling **** against the tide trying to get loud in a convertible or soft top anything and getting a trunk loud without doing some sort of flat wall is extremely difficult either.

I'm sure you can build a box in the trunk that'll have adequate room for a pair of 12s but you're not going to get 8K out of an 8K amp without significant investment in your electrical system. IMO if you're not ready to just flat wall the thing at the b-pillar you might just leave well enough alone and look for a much larger vehicle next time you buy if getting very loud is a priority for you.

I really do want to get an suv, but would it make sense to wall it into the trunk? If im not doing 2 12s on 8k, ill likely get a 3k or 4k and a sundown 12, and build a box thats made for 1 12. Later today I will post pictures to show what im working with now.

 

[TheRadio]

I think it can be done with a trunk wall. I have an 06 Corolla that I'm trying to stuff 2 15s or 4 10s into. The opening is pretty generous for an economy car and the opening into the cabin was something like 13 1/2 x 34.

That opening into the cabin would be the limiting factor I would think because you would need room for a port big enough to move all that air. Maybe a 8 or 10 inch aeroport since they are the most efficient shape.

Here's a poorly lit picture of my trunk.

 

[hispls 5,000+ posts]

That opening into the cabin would be the limiting factor I would think because you would need room for a port big enough to move all that air. Maybe a 8 or 10 inch aeroport since they are the most efficient shape.

That's about right I think. I've never seen a successful sedan build like that with larger than 12" drivers. You probably do not have as much airspace in there as you think you do after you build a sufficient size and strength box and find room for amps and batteries.

 

[JetskiReese]

That's about right I think. I've never seen a successful sedan build like that with larger than 12" drivers. You probably do not have as much airspace in there as you think you do after you build a sufficient size and strength box and find room for amps and batteries.

Im going to place batteries and amps in the spare tire compartment, would a 6" aero port be big enough or would i need an 8 or 10? I cant remember but i believe i can fit a 15"H x 33" W box but i will have to either assemble in the car or not have it extremely deep. If this box isnt practical, I might try either dual sundown 10s or just 1 monster 12. with a 390A alt im pretty sure I would have pretty solid backing for a 4k without going crazy on a bank. If i get a new daily soon I will say **** it and wall the back half off. If I wall off the corolla I might as well do 2 15s with A LOT of air volume.

 

[hispls 5,000+ posts]

Im going to place batteries and amps in the spare tire compartment, would a 6" aero port be big enough or would i need an 8 or 10?

You're going to run into some issues with weight on the arse end of your car at some point and there's a limit to how much suspension stiffening/upgrade you can get without customizing, also when you start running 80 pound subs 50 pound amp, a few 110 pound sheets of MDF, some 90 pound batteries, 50 pounds of copper cable etc. etc. you are rapidly approaching the weight at which breaking, turning, and accelerating safely may become an issue. B-pillar wall will at least help center the weight a bit better, but be mindful.

6" flared port may or may not function depending on a lot of factors largely out of your control. Obviously at low power you're fine, but beyond that it's anybody's guess. On the far end you can figure out the volume of air in the port and figure out the volume of air your subs will try to displace and you will 100% definitely have a bad day if your subs are moving more air than your port contains.