Speaker & Port Position Question

I have been tasked by my buddy to build him an enclosure to put a pair of low level 15's in his 98 4-door Explorer. I have built plenty of simple, sealed boxes in the past, but want to try my hand at a ported one this time around. The maximum dimensions he gave me to use are 40W x 40L x 13H. That being said, what would most likely be the best configuration for his situation? Speakers up / Port up? Speakers up / Port back? Vertical or horizontal port? Etc. Once again, Thank is advance for any and all opinions.

Sorry.....I accidentally posted this in the wrong section. Hopefully a moderator can delete it for me.

No Bass for you!!! One year!!!


Just kidding. We have some super cool mod dudes that can fix it.

40x40x13 eh? Sounds like it will need to be subs and port facing up, especially being 15" subwoofers. Unless you put them on a pretty sharp angle towards the rear. Which could work.

There are calculations that determine if a driver is suitable for up and down firing arrangements... For longevity one may want to utilize them.

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Originally Posted by chithead

No Bass for you!!! One year!!!


Just kidding. We have some super cool mod dudes that can fix it.

40x40x13 eh? Sounds like it will need to be subs and port facing up, especially being 15" subwoofers. Unless you put them on a pretty sharp angle towards the rear. Which could work.

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I did a mock-up of the enclosure on Sketch-Up with help from WinISD, and was able to position the ports firing back, because that is what someone told me would be best. Would that be an issue with the subs facing up? I figured there are enough great minds on here to set me straight.

I would do ports either back or forward, just spin the box around to see which sounds best. Some subs don't have a suspension adequate to hold the cone when mounted up or down firing...it wants to sag under its own weight, and needs to be mounted vertically (or somewhere close to it).

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Originally Posted by chad

There are calculations that determine if a driver is suitable for up and down firing arrangements... For longevity one may want to utilize them.

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https://www.google.com/url?sa=t&rct=...40915558,d.cGc

Kelvin

http://i51.photobucket.com/albums/f3...209_183953.jpg

Tried my best to use WinISD and SketchUp correctly, did some math, and came up with this. Subs will be mounted on top, firing up. Any thoughts? Don't hold back. :D

Are the seats raised? I only have 7 inches toward the back of the cab and 11 to the front off the seat. Are you countersinking the sub into the box to account for excursion? I'm certainly not the expert, I'm simply reiterating the questions I fielded when I was designing my underseat box. A bunch of the actual guys who know what they are doing will be here shortly with more questions, and some awesome answers for you!

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Originally Posted by beak81champ

Are the seats raised up? I only have 7 inches toward the back of the cab and 11 to the front off the seat. Are you countersinking the sub into the box to account for excursion? I'm certainly not the expert, I'm simply reiterating the questions I fielded when I was designing my underseat box. A bunch of the actual guys who know what they are doing will be here shortly with more questions, and some awesome answers for you!

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Actually, the enclosure is going all the way back up against the rear hatch. I was given maximum measurements of 40L x 40W x 13H. The reason he gave me a maximum height of 13" is because he wants to be able to unroll the factory package area cover over the box when he is not driving. Said he wants to try and keep it hidden from prying eyes when in parking lots and such.

I would try the enclosure ! When the cover is rolled up , will it be possible to alter the positioning by 90 degrees and set the box with speaker firing at rear door and ports firing up ?

http://i51.photobucket.com/albums/f3...101_152004.jpg

Finally made some time to put this thing together. Just waiting on a couple small things to show up from UPS and we can throw it in and see how it sounds.

Excellent job! Just make sure that you tie it down somehow, you don't want a 600lb projectile bouncing around during a bad accident.

That is some nice, clean work there bro!

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Originally Posted by beak81champ

That is some nice, clean work there bro!

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Thanks. I built it for a good friend of mine, and he is happy with the way it turned out. Now hopefully it sounds fairly decent. :)

That is friggin beautiful ! The box is appropriately sized , so it will just slam ! The friend will not complain about output.

Here's the box sitting in the back of his Explorer. Don't give me too hard of a time about the carpet not matching the interior. LOL. I wanted to go with tan, but he insisted on grey/charcoal.

http://i51.photobucket.com/albums/f3...116_163611.jpg

http://i51.photobucket.com/albums/f3...116_163539.jpg

That is awesome! Those minty MTX boomers look so pretty too :)

Looks great Joe50302 !

Does it HIT ?

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Originally Posted by Hic

Looks great Joe50302 !

Does it HIT ?

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Not sure yet. My buddy ended up getting tied up with another project, and hasn't finished wiring up the amp yet. :banghead:

Did he make time , yet ?

I know he will love it !

Still not going ?

Got it going about 6 months ago, but forgot to get back on here and post about the results. LOL. Needless to say, my buddy was VERY happy with how it sounded. I was kinda surprised on how loud it was myself. Only problem he had, was one of the coils started to rub about 3 weeks ago. Sounds kinda bad. Now in the process of choosing some replacement subs that will work with his enclosure and not break his bank.

www.onlinecarstereo.com/CarAudio

Massive Audio GTX 124