Dodge Ram 1500 Quad Cab Enclosure for 2 18's?
 

Hey guys I'm planning on 2 RE sx18's for my truck. I sketched this design up but I'm a complete noob and would like for someone that knows their stuff to let me know if it will work or can point me in the right direction. The subs require 5.5 - 8 cubic feet. I want a nasty low playing bass!

This is the truck they will go in. I will be removing my rear seats for most amount of room I can get. I have about 64" wide x 26" from back wall to my seat in the current position but I could scoot up a bit, and 24" from back floor to the rear window line. I could go over the line but want to be able to see out the back still.

The plan is to have the subs facing up and the port shooting right between the seats.

If you need more info please let me know and I would enjoy working with someone who knows whats up!

Thanks!

https://www.caraudioforumz.com/attac...ine=1391398845


and the box I sketched up which puts me like 5" over my rear window line already but I could do without that thick baffle?

https://www.caraudioforumz.com/attac...ine=1391398845

https://www.caraudioforumz.com/attac...ine=1391398845

https://www.caraudioforumz.com/attac...ine=1391398845

https://www.caraudioforumz.com/attac...ine=1391398845

For best performance you want your port on the baffle with the subs. I run 2 18's myself and my baffle is 5" thick. Keep the baffle as you have it. You'll want to completely resin the whole internal area of your box and flare the port opening as well and round over the port in the box Be sure to brace the box internally to.

Alright I was afraid that was the case too but I spent all that time sketching it. I will just flip the port and see what happens. Do I have the right Idea for the port? 6" wide so its 6 inches away from the back of the box? If you could point me to a place to learn up on it I would appreciate it.

Your ok there. What is this enclosure tuned to?

I'm not totally sure because the re calculator only has a single L port so I just doubled the numbers. Trying to get it to 34 hz per the recommended specs from re. That is what I really need help with, the math for correct volume and port tuning.

Whar type of music are you going to be playing? Be specific..

I listen to a little of everything from Pop, Rap, Bass songs, Dubstep and sometimes even country and rock. I usually play whatever pounds the hardest or sounds the cleanest. Also I am currently running an alpine IDA-X305s with the imprint PXA-H100 with alpine type r SPR-60c components in the door amped by a JL JX360/4 bridged.

One quick question. Can I put the Clarion 7 band eq before the imprint for finer tuning? I figure if I just have everything set @ 0db when I tune then I could mess with the EQ after. Seems like it should work but I really don't know that much yet.. still learning.

Thanks for the info and I will be re sketching a box per your help via PM's which I am very thankful for!

Peace

I personally would not use the Clarion EQ whatsoever, use the settings on your Alpine to fine tune the system. Adding more products can add more problems if something goes haywire in the system. When you have a lot of bass in a system this can cause structural damage to a vehicle (breaking factory welds, loosening of window glass, factory plastic cracking, etc etc ) this can destroy equipment as well. Been there done that.

So 2 18's could possibly destroy my truck o.0 dayum. I have been searching craigslist for a bass mobile like a tahoe or something with more room and then I would not care so much about breaking stuff. I like my truck and don't want to destroy it! Its a 2007 with 25k miles. If I were to completely second skin and luxory liner pro the interior would it help from bad damage? I suppose window seals can always be replaced but when you say factory welds thats kind of scary lol.

Yes sound deadening is a great thing to do and will help with the bass as well, now when I said welds can break that can happen when your system gets over 155db. A truck is built stronger and can handle more so I'm quite confident you won't break welds, plus your not going strictly SPL, you'll be fine (LOL)

What would qualify for stricktly spl?

Going into competition for SPL (Sound Pressure Level) this is where you play bass tones in whatever frequency your system is tuned to, to achieve your loudest score in decibles. This is non musical.

Alright tell me what you think of this one.
My math tells me I have 14.79 cubic feet in the box before bracing and displacement of the drivers.
1,449 cubic inch port area or 0.83854167 cubic feet
port plate takes up 129.375 cubic inches or 0.07485979 cubic feet lol

Let me know what you think and what the port tuning would be.

https://www.caraudioforumz.com/attac...ine=1391478814

https://www.caraudioforumz.com/attac...ine=1391478814

https://www.caraudioforumz.com/attac...ine=1391478814

Thats the ticket, you just need to make the port 1.5" thick looks like its only .75" in thickness, the tuning is as I said in your PM. I've taken in woofer displacement and the vent when I gave you the dimensions initially.

This is what I came up with.

https://www.caraudioforumz.com/attac...ine=1391914351

https://www.caraudioforumz.com/attac...ine=1391914351

With a Q1-3500D.1 Amp
Q1-3500D.1 Amplifier

Think this will work for me?

Why did you change it? Your baffle is no where near strong enough for 2 18's being an inch and half thick

The original design is what I personally see fit for your application

I changed it mainly for the port to be centered and to keep the height in check. I figure I could brace it well and resin it and if need be I could always add another layer. I asked around on other forums and some people told me I didn't need 3" baffle for 2 1000w subs lol.

You don't get maximum bass with 2 18" woofers having a port in the middle. Best of luck with your build.

Can you help me better understand why a port in the middle has less bass than one on the side? honestly I don't understand this stuff so would really like to get educated. I haven't bought subs or and amp yet so I have not decided on a final design.

I'm not going to get into detail for the simple reason as you won't understand at this time being so new to this. I'd strongly suggest going to different shops in your location and listen to different vented enclosures and see what peaks your interest. Listen to boxes with all sizes of woofers. Boxes that are tuned to different frequency's. See if there are generic style boxes and "Custom Boxes" so you can hear the difference. I'll tell you now there is a difference between generic ported boxes and "Custom Boxes" especially if whom ever built them knows how to build and tune an enclosure PROPERLY..... Bring a CD of "your" musical choice, don't let them play what they suggest, as they could play a " bass enhanced " competition cd which will make any box sound good.