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View Full Version : Port Placement in a 4Runner



UnderFire
01-10-2013, 06:04 PM
Alright, so I'm getting ready to submit a design request to buck for my 4runner, but I just had another new thought.

I'm trying to decide between these 2 designs for a Daily Driver / Demo Rig set-up. Numbers are not a concern at all.

Sub up, Port to the driver's or passenger's side.

Measurements:

36 D, 20 H, 38 W.

Port 7 Inches from side walls, wheel well not obstructing the port.



Sub Up, Port back

Measurements:

31 D, 20 H, 38 W

Port 5 Inches from the rear hatch


I just need some guidance since I've never done an SUV until now. Please specify which side you think the port should be on to yield the best results.

mylows10
01-10-2013, 06:06 PM
subs up ,port back ,in the center

UnderFire
01-10-2013, 06:09 PM
subs up ,port back ,in the center

A center port would have to be put in the bottom of the box, I originally planned on that, but the numbers don't match up, most port area per cube I can get without getting like 34Hz tuning would be 12.32 / ft, and I'm also not sure that the box design would work well.

gckless
01-10-2013, 06:11 PM
Generally sub up, port back is the first choice, and sub up, port up is the second. That's what I see roll through this site anyway.

UnderFire
01-10-2013, 06:12 PM
Generally sub up, port back is the first choice, and sub up, port up is the second. That's what I see roll through this site anyway.

That's what I've seen too, but I've heard of the Port up configuration sounding terrible due to loading issues on the roof, and the majority of the recommendations for the sub up, port back set-up I've seen were for people chasing numbers.

gckless
01-10-2013, 06:20 PM
That's what I've seen too, but I've heard of the Port up configuration sounding terrible due to loading issues on the roof, and the majority of the recommendations for the sub up, port back set-up I've seen were for people chasing numbers.

Well I can't help you any more than that :crap:
pro-rabbit Buck double 07 might be able to shed some light.

I'll be watching this though because I'm going to be doing a build in the spring in (hopefully) a Blazer.

Buck
01-10-2013, 06:29 PM
Port back, subs up, port center or across bottom, depends.

mylows10
01-10-2013, 06:35 PM
Port back, subs up, port center or across bottom, depends.

told you :p:

bhsdriller
01-10-2013, 06:43 PM
go big or go home
2 girls 1 window - YouTube (http://www.youtube.com/watch?v=pHOzL1PbQtQ&list=HL1357861374)

slim2fattycake
01-10-2013, 06:44 PM
very dependent on a lot of things but in a 4runner a while back I did a single 15" btl on 1500 watts with a sub up port back kerfed passenger side and was doing 148s on music average.

UnderFire
01-10-2013, 06:45 PM
Port back, subs up, port center or across bottom, depends.

Alright, sending you my spec sheet now then.

UnderFire
01-10-2013, 07:19 PM
I threw together a couple designs for both set-up's, still can't get the numbers I want on Port back, but port to the side the options are seemingly limitless, anywhere from 7.5-9 Cubes, 31-34Hz, all perfect Port area/ft. Waiting to see what Buck comes up with for Port back.

Buck
01-10-2013, 07:26 PM
If it's one sub than port up sub offset rear to one side.

UnderFire
01-10-2013, 08:00 PM
If it's one sub than port up sub offset rear to one side.

I'm assuming you mean sub firing into the hatch, I'd really prefer not to have that set-up I don't trust ~2" of wood to keep the sub solid.

CaddieJapan
01-10-2013, 08:25 PM
Subs up port back. It also looks wicked as hell when those subs are pounding. Waiting on my second Xcon and this should be beating hard. This box is close to your measurements btw.

26539013

Buck
01-10-2013, 08:29 PM
I'm assuming you mean sub firing into the hatch, I'd really prefer not to have that set-up I don't trust ~2" of wood to keep the sub solid.

Ya, I meant sub up port back port off to one side, sub off to other.

double 07
01-10-2013, 08:46 PM
Do subs up......port back......You can do port across bottom just build a center support that has a little size to it that will take up some of the port's width....It will serve 2 functions...Support the port wall and it takes up space inside the port so you can get the ratio correct.....You can see a small one in the middle of the box I done for Dtrom below......Just remember to take it's displacement from enclosure CF........




http://i1079.photobucket.com/albums/w513/pwdrblucivic/Dtrombox/20121222_140241.jpg

CaddieJapan
01-10-2013, 08:55 PM
^^^ Bam!!! Looks good to me....

Nick32194
01-17-2013, 10:17 PM
I have a 2004 4runner as well with 2 15's and the sub up position seems to work much better in clarity and in the reduction of rattles. As for the port position I would place it long-wise along the top with the subs, but that is just my oppinion because that hatch vibrates like crazy. Let me know how this build goes because I am planning on building a new box in the near future.