help calculating my airspace

[flood77]

can someone tell me what my internal volume is with these outside measurement?

this enclosure is one big enclosure divided with 4 subs,so they are in seperate chambers.

45 wide 38 tall and 10 deep made with 3/4 wood.

and if you could tell me what im tuned at

each chamber has a 4"aero port 16" long and they have a elbow inside thats how they were able to get that length of tube... thanks for any help

[CleanSierra]

before displacements of subs or the ports you have, you've got it SHOULD be 2.23 per chamber. That number is before purr or sub displacement, which I believe you are running Sundown SA series right and 4" PVC ports? I think the SA is like .14 and I'd guess your port displacement is probably another .20 at least

[CleanSierra]

This is what I came up with quickly and my picture of how your current box is layed out:

[CleanSierra]

It ain't pretty, I do sketchup. I saw your other party though and I believe this is similar. You spent a lot on the current setup too huh? Someone else can better design you a wall around here that would perform much better than the current one. Why did that shop choose to go with 4 boxes instead of a shared volume enclosure?

[flood77]

not sure and i also thought they would use a different style port. also i noticed your sketch witch by the way is dead on,but i noticed for width you have 27.5 the box is 45" wide shouldnt that be 22.5? sorry

[CleanSierra]

not sure and i also thought they would use a different style port. also i noticed your sketch witch by the way is dead on,but i noticed for width you have 27.5 the box is 45" wide shouldnt that be 22.5? sorry

haha math>me

Recalculating

[CleanSierra]

Internal airspace after displacements is 1.54ish and tune is at 34ish

The port area is low in my opinion, I personally would have done a big L-port. The L-port obviously eats into potential displacement. What kind of vehicle is is again? S-10?

Btw, I forgot sub displacement before and have added .14, that has to be in the ballpark.

[flood77]

its in a 2000 gmc sierra ext cab,

does the airspace seem alitle under for the subs,i know that it still falls in the range that sundown recommends but ile be honest it doesnt seem right to me. what kind of box would you put those in?

hell ile pay someone for a legit design and build it myself

[CleanSierra]

If you are sending rated power I'd go with more space if it were my truck. If you're seriously overpowering them, is probably keep the same volume, but I'd fed them more port. You should have MUCH more depth to play with in a full size GMC. If I were bidding a wall, with those subs, I'd probably do L-port, @ probably around 120-140 inches of port at them. Like this:

Please excuse the crude sketch. I came up with the whole thing in a couple of minutes with no real thought. Port could be shrunk a little and you could tweak things here and there, but a design like that is where I'd go. Also, the south is 14", which you SHOULD have

[flood77]

im putting a 1000 rms to each one,they seem to be taking that with no problem hell ive seen people put more than that to them.

would maybe not having them walled like so and going a different direction for a box improve sound quality and let me feel more of the bass?