SpawnZ Posted November 28, 2011 Report Share Posted November 28, 2011 My buddy asked me if I could help him build a box for his subs in his one cabin truck. I told him I have no idea about how to build or tune boxes but I'll try my best to help. He's more clueless then I am when it comes to this stuff. He told me he wanted his box ported so I started mocking up a design with the dimensions he gave me. Here are the max dimensions: 55W, 18H, 9.5 Depth I used 50W, 17H, 9 Depth I tried matching up the recommended cubic feet on the subs the best I can, which would be two of these Kicker 15's. For one thing, I'm not sure since he's going to have two subs if the recommended box volume should be doubled or not, I got it to 3.15 cubes though. Next I have no idea on how to tune a port. I ended up with a 4x6 port tuned to 34hz on the top. I can only assume that this is wrong: Here's how the sketchup turned out though: Any help is extremely appreciated. Remember, I'm here to learn Quote Link to comment Share on other sites More sharing options...
loudNlow87 Posted November 29, 2011 Report Share Posted November 29, 2011 Yes. You have a round port in your model and a 4 x 4 square port in your calculator. Round ports are more efficient than square/slot, so you don't need as much area as would with a square/slot. But you should stay within the "Port Area Range" it provides. You only have 5.08 inches per foot. You should have at least 9-10 per foot if you're using round ports. Not sure which you plan on using though..? Quote '11 Jeep Patriot New Build Head Unit: Pioneer AVH-P3200DVD Front: Massive CK69 Components Front Amp: Massive NX2 Rears: Infinity Kappa's Subs: 8 Sundown SA-8 v2's Sub Amp: AB 450.1 XS D3100 Come on 150! Link to comment Share on other sites More sharing options...
SpawnZ Posted November 30, 2011 Author Report Share Posted November 30, 2011 I changed it on the calculator so it's circular instead of square. That was my original intent. We're attempting to achieve loud, but still sounding good. Would it be better to seal it off, especially with the volume specs: Doing the math I'm only getting about 4.4 cubic feet. So would it be better to seal it off, or just use one? Quote Link to comment Share on other sites More sharing options...
412 CVX Posted November 30, 2011 Report Share Posted November 30, 2011 (edited) need to add in woofer displacement. and you see the little box that says "port area per foot" in the bottom right? you need to keep that number between 8-12. 3-4 is waaay too little port area. also, if you've got two subs the box volume needs to be doubled. the recommendations given are per woofer. those look like 15's, yes? would be very helpful if you could tell us what 15's they are. Edited November 30, 2011 by 412 CVX Quote Just say no to Ground Pounder Customs. My temp system build log More box buildssome cars do over 170db with one sub, so clearly my two 12"s can do that in my car, with my knowledge too! look out bitches! I'm with captain stupid. Link to comment Share on other sites More sharing options...
bassahaulic Posted November 30, 2011 Report Share Posted November 30, 2011 (edited) I'd do one ported. With woofer behind the passenger and the port out the driver side. need to add in woofer displacement. and you see the little box that says "port area per foot" in the bottom right? you need to keep that number between 8-12. 3-4 is waaay too little port area. those look like 15's, yes? would be very helpful if you could tell us what 15's they are. They are Kicker Comp 15"s. He posted a link. I would say 16²-20² of port per cube. Edited November 30, 2011 by bassahaulic Quote Link to comment Share on other sites More sharing options...
fmedina Posted November 30, 2011 Report Share Posted November 30, 2011 need more port area Quote Link to comment Share on other sites More sharing options...
SpawnZ Posted November 30, 2011 Author Report Share Posted November 30, 2011 (edited) I'd do one ported. With woofer behind the passenger and the port out the driver side. need to add in woofer displacement. and you see the little box that says "port area per foot" in the bottom right? you need to keep that number between 8-12. 3-4 is waaay too little port area. those look like 15's, yes? would be very helpful if you could tell us what 15's they are. They are Kicker Comp 15"s. He posted a link. I would say 16²-20² of port per cube. Alright, I'll run that by my buddy. Let me redesign Edited November 30, 2011 by SpawnZ Quote Link to comment Share on other sites More sharing options...
412 CVX Posted November 30, 2011 Report Share Posted November 30, 2011 I'd do one ported. With woofer behind the passenger and the port out the driver side. They are Kicker Comp 15"s. He posted a link. I would say 16²-20² of port per cube. agree with one ported. my experience with kicker is that they like big boxes. i apologize for missing the link. lastly where did you get that number? Quote Just say no to Ground Pounder Customs. My temp system build log More box buildssome cars do over 170db with one sub, so clearly my two 12"s can do that in my car, with my knowledge too! look out bitches! I'm with captain stupid. Link to comment Share on other sites More sharing options...
bassahaulic Posted November 30, 2011 Report Share Posted November 30, 2011 I'd do one ported. With woofer behind the passenger and the port out the driver side. They are Kicker Comp 15"s. He posted a link. I would say 16²-20² of port per cube. agree with one ported. my experience with kicker is that they like big boxes. i apologize for missing the link. lastly where did you get that number? Which number? The port sizes? Best sizes I've come up with based on experience. Quote Link to comment Share on other sites More sharing options...
fmedina Posted November 30, 2011 Report Share Posted November 30, 2011 i thought if youre using aero ports its more like 9-13 per cube Quote Link to comment Share on other sites More sharing options...
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