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fannin88
01-18-2012, 06:29 PM
Im looking to put 2 HFX12d4's in back of a 94 4 door honda accord. Id like to have them firing toward the inside of the cabin. I carry tools and some other work gear in my trunk, so id like to keep the subs safe so they are not getting hit my anything that would happen to fly around back there. I plugged my dementions in to RE's box calculator and came up with this. I listen to rock most, with some country every now and then. Suggestions?

26529899

mast240
01-18-2012, 06:30 PM
cant really see the box specs in the pic... list them?

fannin88
01-18-2012, 06:32 PM
sorry! first time iv ever posted a pic and im not sure how to resize.
outside: 31w x 15.25h x 20d
volume: 3.44 cubes, tuned to 33.57

CAT MAN
01-18-2012, 06:35 PM
Do not use re calculator

fannin88
01-18-2012, 06:42 PM
Oh, I'd just read a couple threads that was full of people saying how much they liked it. Any other easy suggestions?

CAT MAN
01-18-2012, 06:42 PM
Oh, I'd just read a couple threads that was full of people saying how much they liked it. Any other easy suggestions?

that is one of the worst calcs ever... go to smd and search "torres"

double 07
01-18-2012, 06:46 PM
Download the TORRES calculator.....

skitzafit
01-18-2012, 06:46 PM
http://forum.mwcaraudio.net/showthread.php?t=1699

fannin88
01-18-2012, 06:47 PM
Alright, I'll check up on that.
Anybody else have any other suggestions? Id like to keep the subs facing forward, is port forward my best option in that case?

iamamp3pimp
01-18-2012, 06:49 PM
keeping the subs and the port on the same plane is ideal when you can do it. Seal off the enclosure at the front as well for gains there as well.

double 07
01-18-2012, 06:50 PM
Do sub and port back if space will allow for it....

fannin88
01-18-2012, 06:50 PM
Thanks for the fast replys guys!
By that, you mean the opening behind the rear seats going into the trunk, right?

Imtjnotu
01-18-2012, 06:51 PM
yes face them back in ur accord

fannin88
01-18-2012, 07:09 PM
Keep any thoughts coming! The last post I posted had to be "approved by a mod" for some reason. I'm not sure how long that takes though...

BrownVanMan
01-18-2012, 07:11 PM
i had 2 of the HIFI versions sub back port back with 3 cubes it about 33hz and it had a nice kick but got low too. that was on only 400 watts to the pair too. going back i would want more like 4 cubes to dig a little deeper.

CAT MAN
01-18-2012, 07:21 PM
when i did my first 140 it was with the hfi 12s ... 4 cubes total with 2 4x10 inch aeros. think it was 36hz? box is sitting in my room its .5 mdf deminsions are 34x16x16 iirc.

those subs need airspace due to the lack in motor force. but they are good subs

fannin88
01-18-2012, 07:23 PM
Good deal!!
Im planning to buy a bigger sized audiopipe amp. I know everybody is putting pretty low power to them (looks like an average of 300-500 a pair) Reason i want to use that is if Id want to upgrade in the future, I'll be good to go. Plus, for $130, I dont think I can not go for it.

CAT MAN
01-18-2012, 07:24 PM
Good deal!!
Im planning to buy a bigger sized audiopipe amp. I know everybody is putting pretty low power to them (looks like an average of 300-500 a pair) Reason i want to use that is if Id want to upgrade in the future, I'll be good to go. Plus, for $130, I dont think I can not go for it.

ive seen the hfi series take retarded power... mine were on 1k

fannin88
01-18-2012, 07:33 PM
Woah, nice! Just curious, what amp did you have running them?
heres another question. This guys build was on an 08 civic si, and has basically the same size as what Im going to use (I'm assuming they are close in trunk size, which is surprising) but I cant figure out what the box depth vs the port length deal is all about. Can anyone explain that to me?

26529900

fannin88
01-18-2012, 09:38 PM
:sneaky:

jeremyg1
01-18-2012, 09:41 PM
I cant figure out what the box depth vs the port length deal is all about. Can anyone explain that to me?

26529900

In that the port length is longer then the depth of the box?

fannin88
01-18-2012, 09:44 PM
Yessir. He posted pics of it being built, and it wasnt just a " | " it had the other piece to make it an " L " shape, so maybe its the total port length though? I cant seem to figure out whats going on. Nobody on SMD questioned the fact that its longer, so I wasnt sure if I was just missing something or what?!?

jeremyg1
01-18-2012, 09:50 PM
Effective port length is 24 inches:

http://farm8.staticflickr.com/7026/6723467679_8418c839ca.jpg

Does that clear it up?

fannin88
01-18-2012, 09:57 PM
Yes, Thanks!!
BUT, how did you come up with those numbers? Im aware that you had to end up adding the 2 numbers together and get 24" but im curious where 17 3/4 came from. Wouldnt it change it if you had said 12 and 12, or 15 1/4 and 8 3/4?
Sorry for all the typical new guy questions. Id just like to educate myself more on this

double 07
01-18-2012, 10:00 PM
When you have a L-port the port length is measured down the center of the port.....that is why the physical wood port is shorter than 24"

jeremyg1
01-18-2012, 10:05 PM
http://farm8.staticflickr.com/7033/6723527333_a5b645a94b.jpg

fannin88
01-18-2012, 10:05 PM
Ok, I donno why I didnt understand that. Thanks alot guys, i see exactly what yall ment now! Greatly appreciated fellas

duanebro
01-18-2012, 10:09 PM
To, I hope, clear up how to measure correctly, do you add any thing on to the inside measurement because three of the sides continue past the port? I heard that you need to add half the port width to the length of the port to figure effective port length?

I hope I have wrote that so it won't confuse anyone.