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View Full Version : 4 Alpine Type-R 12s ported.. in a trunk?



Pimpdaddyq
03-01-2006, 08:21 PM
Hey I just ordered 4 12" alpine type-r's (yes the new ones) and I want to put them in my trunk. My biggest box that I can fit in there (without building INSIDE the trunk) is 37 wide, 16 high, and 19.5 deep. I am pretty good at designing, and building boxes, but I want to fit all 4 facing my back seat, ported. Only thing I was thinking, is have 3 ( like OOO ) and slot ports at the bottom, and one facing the rear, or where its got 2 in the middle, and 1 on each side angled 45 degrees.. similar to /--\ (if you can understand that) with the 4 subs all right there. Let me know what you think. If i do it like that, how do I make the measurements correct? I always have difficulty doing that. Thanks

Andrew


BTW I have a van now that i am redoing the interior in, and building a wall for the type rs, but i want them in my car until im ready for them. So this is temporary.

Mr. Opportunist
03-01-2006, 08:22 PM
no way in hell you can properly fit 4 12's ported...

Pimpdaddyq
03-01-2006, 08:32 PM
What do you think... what do you recommend for ported box size?

Mr. Opportunist
03-01-2006, 08:34 PM
its not possible you can fit 2 at most...

nissanrider06
03-02-2006, 12:17 AM
first of all dont face them opposite directions, i would just throw in 2 for now, why dont u face them to the rear in all my tests in trunks i foun dit was louder, unless u have folddown seats

fat_hurts
03-02-2006, 12:20 AM
It will be loud. We use them.

zsondy1
03-02-2006, 12:29 AM
It will be loud. We use them.


whos we ?

KngOfThePkngLot
03-02-2006, 12:30 AM
whos we ?
:crazy:

Mr. Opportunist
03-02-2006, 12:34 AM
first of all dont face them opposite directions, i would just throw in 2 for now, why dont u face them to the rear in all my tests in trunks i foun dit was louder, unless u have folddown seats
your tests are wrong...

nissanrider06
03-02-2006, 04:54 PM
im not saying if u have folddown seats they wont be louder but its not always louder if there facing the rear, in my experience! how can my tests be wrong (being i stated in the setups i have tried)?

Pimpdaddyq
03-02-2006, 04:57 PM
I had my box where VERY LITTLE air even fit between the box and outer walls, and between the top of the box and the trunk. Same box, turned around honestly made it 2-3 times louder than before. Buts that my test I guess. My backseat is also a custom loveseat and can remove the pad and lay it down. Obviously like a fold down, and louder. I always liked it better, and i thought the same thing with the facing the rear, until I tried it. But I dunno I am waiting for the type-rs to get to my house and figure it out. Thanks again. More options or ideas would be great!


Andrew

Chriscivic
03-04-2006, 11:26 AM
those dimensions will not allow enough room for ported. I built a box for three type r's in the trunk of my civic and it is 39" wide x 16" height x 30" depth. you have enough room there to properly do two ported

Loudrango112
03-04-2006, 11:54 AM
1)Not enough room
2) Face them toward the trunk...
3)Use 2.

psych0ticnemes1
03-04-2006, 11:55 AM
that is 5.4 cubes before any displacements... = you can do the 4 R's, but 5 cubes sealed..

or two R's properly ported (and sell me the other two hella cheap ;))

Mr. Opportunist
03-04-2006, 12:00 PM
1)Not enough room
2) Face them toward the trunk...
3)Use 2.
fire in, not towards the trunk

Jameseypoo
03-04-2006, 12:07 PM
fire towards trunk..

Loudrango112
03-04-2006, 12:08 PM
fire in, not towards the trunk
Explain to me why..... id love to hear this.

Jameseypoo
03-04-2006, 12:10 PM
lol, me too

Loudrango112
03-04-2006, 12:11 PM
lol, me too
EXACTLY!

Firing them TOWARDS the cabin... TOTALLY elimated the whole purpose of "Cabin pressure".

Trust me man... rear fire them.

nismboy6986
03-04-2006, 12:20 PM
based on my own theories i think foward firing with trunk and cabin sealed off owns rear firing. i never got to try it both ways since it would have been impossible to put my box in without damaging the sub if was rear firing due to the depth of that box but here goes my theory anyway
I had a 15 avalance in a 3.5 ported box tuned to 28hz front firing sealed off with trunk sealed off in cabin. i now have the exact same set up amps headunit ect in a 03 celica hatchback but in a 2.5 sealed box. if i'm correct the "gain" from a ported box isn't near as high as the gain" from being in a hatchback so the setup in the celica should own the setup in the sentra and nether car is now to be a bass trap or "magical bass wagon" and it might be just as loud if not quieter than the sentra. but i have yet to do any sound deading to the celica and the box is a lil leaky since i had to break (read chisel) off some of the excess fiberglass since i didn't tape the box off like a i should (going to seal and bondo box after i get off computer and post pics once i get it wrapped in faux suede) i'll get it miced later to see if it broked the 142.5 the setup did in the sentra.

thugpassion
03-04-2006, 12:30 PM
nismboy6986 - maybe i just dont get what your saying but it seems like you have too many variables. plus i dont get how this would support either foward or rear firing as the better option?

not trying to flame or anything, just seems a lil confusing and unrelated.

Loudrango112
03-04-2006, 12:31 PM
nismboy6986 - maybe i just dont get what your saying but it seems like you have too many variables. plus i dont get how this would support either foward or rear firing as the better option?

not trying to flame or anything, just seems a lil confusing and unrelated.
Agreed... hes just stating the fact that he likes fireing towards teh cabin... even tho he hasnt tryed rear fireing

80INCHES
03-04-2006, 01:11 PM
or u can put 4 of them in a 4th orderbandpass or 2 in a 6th order bandpass

80

m98bigshot
03-04-2006, 04:51 PM
i would just throw in 2 for now

Word.


Two is plenty.