how much gross/net space do those boxes take up? ive herd the cobalt trunk is 13.6 cu ft total space so im just getting a feel of how much i want to use for my subs eventually

 

The boxes are about 4cu-feet each. plus there is room behind them, about 4" the length of the trunk

 

cool.. what thickness wood did you go with

 

holy ****, thats some bump. In gonna have to show this to my friend to make his rockford setup look like a little bitch

 

3/4" MDF, what else? lol

 

Those boxes are a little more complex than they probably look. They have a fillet on the top corner of the back side, because the trunk slants at the back corners. They are also dual chambered and not just one big chamber, so they have an interior wall.

I have a question though, I hear alot about using polyfill. What effects will this have other than lowering the frequency? Will it gain anything dB wise?

 

hack it will make the bass alot deeper or smoother, but the downside to it is it wont be as efficient (sloppy). poly fill is mostly use to make the sub think that the box is bigger, so you really dont need it at all, but in my case i had to use it, alot of it, so that i didnt get noise from my box

 

I could definitely use a little then I think. The boxes are made to be just above the minimum recommended volume

 

do it its easyy to put in and take out

 

sounds like sex to me

 

I think I'm going to get a Hifonics BXI2006D

They're like $350 on ebay, and they put out 2000w RMS @ 1ohm

I hear lots of good things about these amps on RealmOfExcursion forums too

 

BTW tomorrow starts prototyping and pre-fabrication of my trunk panels

 

The post went to hell in a hand basket. Good luck on the install.

 

i know of someone selling an rf amp that is rated at 1500... but the average birthsheet on that model is 2576X1@2ohm or 1288@x@1ohm

 

oh its for 400 btw

 

You know your sound system is too large when...

- Your DIC constantly Flashes "POWER STEERING", "CHECK CHARGE SYS", & "BATTERY SAVER ON" while listening to the radio at higher volumes.

- Your back end sags like you've got several dead bodies in the trunk

- Your CD player can no longer play CD's because of the intense vibrations

- Your car almost stalls when idling and playing the stereo at the same time

EDIT: - Your trunk and spoiler flex several inches up and down due to the intense environment in your trunk

 

that is a lot of bump too much for me. but i cant say too much, im working on my 2 L7 Solo barics. i should have it finished today.

 

you need a bigger alt.

and more batteries

 

You might need a whole separate car in tow to run those bad boys. That's a lot of power loss.

 

your stuff always looks good in the end Hack. Good luck finishing it.

Personally, I wouldn't ever do this to my car, but then again I'm not big into audio. Plus, with that much bump, how would I hear the exhaust and the wine of the supercharger. Now THATS music to my ears

 

This can be solved by the first upgrade that should have be done which is a higher output alternator. As for the vibrations...DYNAMAT!
The polyfill will only trick the subs into thinking its in a bigger box; therefore, sounding deeper not increaseing Decibels.
Good thing you got rid of that crappy sony amp! Pretty nice to have 4 12's...been there done that... You should be in the 150db with 4 12's! I hit 152.8 with 4 12's.
Can't wait to see the finished product!

 

no dynamat second skin ftw

 

I'm selling this setup, $500 for the boxes and subs

 

now u sell it i dont understand why?

 

dude you are worse than me