4 10"s Ported Design Help

[rickyfromthe407]

Hey guys need a little help with box design ( more visualizing a concept if anybodys got time to draw something up in sketchup for me )

Got 4 10"s Memphis M3s

The max trunk space I have in my 1995 2dr Civic EX is 33w x 14.75h x 25d comes out to i think 5.3cf which might be a tad tight, but I should be able to fit it. ( dont wanna build the box in the car )

Want a ported box, with all subs facing up - not sure which way to port it whether the port should be up facing or forward towards the back of the car or towards the cabin? ( what do you guys think? )

Here is some images of the information sheets I got from memphis..

First one is all the specs of the sub - mine is the second column M3104D

Second one is what they told em for enclosure recommendations ( they sent me a huge PDF for bout 20 subs, so I just screenshotted and copy/pasted what I need and made my own image ) I think the Optional tab is their form of recommended.

And the third one is just some calculations I made with Torres Calc not 100% right specs but somewhere in the ballpark.

Anyways, to sum it up, what do you guys think would be best for the port firing direction?

And - Anybody wanna draw me up a sketchup free if possible..

Edited July 13, 2011 by rickyfromthe407

[taylorpro]

you have virtually no port area man. deff need to bring that up to at least above 12 sq inches per foot if using a slot port

[tonedeaf]

You're going to need quite a bit more port. I'd try for around 85 inches of port I think. Try bumping your port width to 3 and extendig your port lenth to around 32.

Edited July 12, 2011 by tonedeaf

[rickyfromthe407]

you have virtually no port area man. deff need to bring that up to at least above 12 sq inches per foot if using a slot port

I am on my MacBook Pro right now, so I dont have access to the Torres calc.

Maybe you could do it for me

Since I completely overlooked that in my design..guess I was just paying attention to the tuning more than the hz

With my dimensions it is kinda hard though...since I havn't built too many boxes.

[taylorpro]

i know a guy who goes by skip01 that has a design for 4 tens that would be applicable in your case i think. the design im talking about is shown in this vid.

as for your specific dimensions, i used 14H x 30W x 25D, 1 6" aero port 13" long, and a driver displacement of .25 cubic feet. just as an idea...

[rickyfromthe407]

You're going to need quite a bit more port. I'd try for around 85 inches of port I think. Try bumping your port width to 3 and extendig your port lenth to around 32.

Widened it to 3" and extended it to 32" and it dropped my tuning to 26hz and Net Volume to 3.96 anddd only gave me a port area of 39in^2

I dont know what I am doing...maybe demanding too much out of the little space I got?

I just kinda figured since they want 2.4cf for 2 subs ported after displacement. It would be a doable, but tight fit

Once again :

[Socky]

I would change the port width to 4 and the length to 20, have the port facing the rear. Would give you a 35.17hz tuning which is still pretty low i would say, and a port area of 52 and 12.83 per ft.

[tonedeaf]

Problem is the port will take a LOT of room in the box, so you may need to make the box a little bigger f you can to counter that. Id try for 60" of port probably. 4" of port and find the right port length to match your tuning.

[rickyfromthe407]

i know a guy who goes by skip01 that has a design for 4 tens that would be applicable in your case i think. the design im talking about is shown in this vid.

as for your specific dimensions, i used 14H x 30W x 25D, 1 6" aero port 13" long, and a driver displacement of .25 cubic feet. just as an idea...

GOD DAMN that shit looks like it slammin I am pretty sure I could get pretty close to that off these though...Hell they sound good in the ported box I built for em. But I'd like to see how they do in ported

I put in those dimensions. And liked it. Port facing the rear or cabin?

I would change the port width to 4 and the length to 20, have the port facing the rear. Would give you a 35.17hz tuning which is still pretty low i would say, and a port area of 52 and 12.83 per ft.

Sounds good... How do you think that would stack against the dimensions/port on the other post I quoted? Just wondering, cuz I was messing with it and came to a conclusion that a slot port was out of the question. But I wanna go with what will be the best I really like that video though... but his is ported towards the cabin.

Any special reason why u say toward rear?

Hmmm...

I wanna ask for someone to draw me something in sketchup - but I dont want them to be wasting their time and effort if I dont know whether to go slot or ported.... Gonna make a poll after I post this...first to 10 wins. LOL

[taylorpro]

do your seats fold down?