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Reit38
10-29-2011, 01:45 PM
looking for a box design for a e8v2 for under the seat of a extra cab silverado. id like to do a ported box. would a upfire or downfire sound better? hoping to have it tuned to 35. amp will be a RF201s if that matters

disturbed471985
10-29-2011, 02:06 PM
Wish I could help but there are a few on here that can and will help you but they want $$. The good ole days of people just helping for the sake of helping are long gone..

Reit38
10-29-2011, 02:25 PM
doesnt surprise me. gave up on audio for awhile now music just isnt the same without it

disturbed471985
10-30-2011, 08:58 AM
doesnt surprise me. gave up on audio for awhile now music just isnt the same without it

I can understand that I cant stand riding in a car without some form of system. To me its like only hearing half the song and the half your hearing is muddy and far from crisp and life like. PM Pro_Rabbit (DC Creations)he may help you out as he is a good man tell him that he still owes me $5 (trully) and to use that $5 to create u a design... Show us the design once he is done with it...

RLJ676
10-30-2011, 05:34 PM
What year truck?

I have an 08 and am looking to do something similar, either under seat or sort of a center console for a single 8 (SA-8 or 1508), tuned to 35.

wenn_du_weinst
10-30-2011, 05:37 PM
do you actually mean sound better or do you mean sound louder?

duanebro
10-30-2011, 07:37 PM
I just made a center console 8 for my mini van. It's only a 150 watt sub, but it sounds great. I have also built a down firing ported box for a 2002 (I think) 2500 HD extended cab. I lost the plans for that box. But if you want to give your max size (HxWxD) I'd see what I can come up with.

Reit38
10-30-2011, 11:54 PM
its an 05
ill get some measurements tomm.

Reit38
11-05-2011, 12:19 AM
heres what i came up with for quick measurents


Height? = 12 Inches
Width? = 20 Inches
Depth1? = 6.5 Inches
Depth2? = 7 Inches

heres what ive found for optimal box sizes

Sealed Box:
0.3 ft^3

Ported Box:
0.60 ft^3 tuned to 35 Hz

duanebro
11-05-2011, 12:30 AM
Is height? from floor to bottom of the seat? Or, this seems right, from the front of the seat to the back?

also are you set on using the e8? or did you just pick it because it would fit?

Duane

Reit38
11-05-2011, 12:36 AM
already purchased it so yes. yes height is front of seat to back. sorry bout that

---------- Post added at 09:36 PM ---------- Previous post was at 09:35 PM ----------

this is also alowing 1.5 off the floor for a downfire

duanebro
11-05-2011, 12:48 AM
no problem, I wish I had the design I did like this before, it sounds like it would work in your truck! I will see what I can do. btw I didn't look up the amp you are using, how much rms power will you be using?

Reit38
11-05-2011, 12:51 AM
its just a rockford 201s. birthsheet says 278 rms

duanebro
11-05-2011, 01:04 AM
Sorry I didn't ask this sooner - what kind of music do you listen too?

Reit38
11-05-2011, 01:19 AM
Height? = 11.5 Inches
Width? = 13 Inches
Depth1? = 7 Inches
Depth2? = 6.5 Inches

total of .349cf3 correct?
i believe displacement is .04
so total of .309 after sub is in correct. so that should work? first time building a box myself lol

---------- Post added at 10:19 PM ---------- Previous post was at 10:18 PM ----------

listen to bout everything

duanebro
11-05-2011, 01:44 AM
yes, it should. I have had an 8" sub in my car before. it was just to quite. I took it out after a day. I'm working on a box design for you, ported. it will be a bit small but I think you will like it. build both and see what you think.

Reit38
11-05-2011, 01:50 AM
awsome. really appreciate it! im hoping being in a truck will help

Reit38
11-05-2011, 01:57 AM
i came up with a ported at 0.605 @35

but
Basic Car Audio Electronics (http://www.bcae1.com/) keeps saying this....

**ERROR** Check your dimensions. The port is too long to fit inside the enclosure. You may need to use a curved port, less port area or a higher tuning frequency.

my port length is 10.26?

thats witha port diameter of 2. if i change it to 1 then the error goes away

duanebro
11-05-2011, 02:43 AM
i came up with a ported at 0.605 @35

but
Basic Car Audio Electronics (http://www.bcae1.com/) keeps saying this....

**ERROR** Check your dimensions. The port is too long to fit inside the enclosure. You may need to use a curved port, less port area or a higher tuning frequency.

my port length is 10.26?

thats witha port diameter of 2. if i change it to 1 then the error goes away

Don't use that, bcae is a great site btw. But you must do some of the math yourself. I haven't found a box design program that works well yet! A 2" port is to small. This box will use a 5.25" x 1" port. It is ~24" long. This makes the box a bit harder to build, but it can be done. I used 1/2" MDF in this design to give more volume in the box. If you can please make the bottom 3/4" Also add a brace in the middle of the box touching the port wall. (i didn't draw it in - sorry I'm tired) I can help with any questions you have, PM me if you want my number.

http://i1091.photobucket.com/albums/i386/duanebrow/Car%20Audio%20Designs/5cf33hzboxforchevy1500extcabJPG.jpg

(Sorry I haven't had any luck with 3D cad.)

And the difference between ported and sealed in this case, on paper. This doesn't include ANY cabin gain.
http://i1091.photobucket.com/albums/i386/duanebrow/Car%20Audio%20Designs/5cf33hzboxforchevy1500extcabsplgraphJPG.jpg

Reit38
11-05-2011, 09:34 AM
hey thanks alot ill give both boxes a try next week hopefully

Reit38
11-07-2011, 11:11 PM
dumb question whats going thru the middle of the sub cutout on the first pic?

duanebro
11-08-2011, 10:05 AM
Its the port. If you haven't started the box yet. I might be able to make an easier to build design. Now that I'm awake! ;)

can the port go out the side of the box with out being blocked? This would just be at the front right corner of the box.

Reit38
11-08-2011, 10:19 PM
duh brain fart im understanding the pic now........port could be external if it was top left corner to go over drive train hump


did another quick measurent tonight when i got off work in the dark and i came up wit for another box if it would work better

5.25x10x34 for demensions

if i go over the drivetrain hump

duanebro
11-08-2011, 10:29 PM
I would see if you can build the port over the drivetrain. It seems it would be easier to construct. I went smaller than I wanted to on the port on the box due to the small box size.

duanebro
11-08-2011, 11:26 PM
This is an idea. How much room can you use. Can you give me a better idea of the total area? The sub will be about a 1/4" from the port in my design. The driver is offset to allow the motor vent room to breath.

http://i1091.photobucket.com/albums/i386/duanebrow/Car%20Audio%20Designs/5cf30hzboxforchevy1500extcabJPG.jpg

Reit38
12-22-2011, 12:58 AM
finally got around to building the box. was tuned way to low sub was constantly bottoming out it sounded like and had lots of port noise.
heres better dimensions that i came up with
http://i246.photobucket.com/albums/gg116/reit38/Silveradoseat.jpg

duanebro
12-22-2011, 02:36 AM
The box I drew? Sorry. I'd like to find out why this isn't working for you.

duanebro
12-22-2011, 02:41 AM
Did you set the amps gains with a meter? And can you send me a pic of the box? Thank you.