sps1989 Posted January 15, 2012 Report Share Posted January 15, 2012 I have a '02 chevy silverado 1500hd 4 door truck that i am planning on putting 4 d2 sundown sa-8 v2s behind the back seat. They will have about .5 cubes per sub. I talked to jacob and he said it would be fine for them to ran in that size box. The box will be made out of 5/8" mdf and the front slant will be 3/4" and will be tuned to 33 hz. They will be powered by a crescendo bc2000. For the box pictured, would 2 4" aero ports or just plain sch40 pvc be enough port volume and sound good? One on each side of the bottom facing in opposite directions. Link to comment Share on other sites More sharing options...
CleanSierra Posted January 15, 2012 Report Share Posted January 15, 2012 Don't choke the port firing it at the sides of the cab. You need at least the diameter of the port from any obstructions to not choke it. Is download Torres box calculator found on this site and plug the numbers in. I'm on mobile, otherwise I'd do it for you good luck. Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
sps1989 Posted January 15, 2012 Author Report Share Posted January 15, 2012 ok so if i have at least 4" of clearance from the port it will be ok? what if a put an elbow or a 45 on the end to direct the air under the seat or toward the bottom of the door? Link to comment Share on other sites More sharing options...
412 CVX Posted January 15, 2012 Report Share Posted January 15, 2012 5/8 MDF is a no-no. and i partially agree with what clean sierra said. It's a good rule of thumb, but it's not always true 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...
sps1989 Posted January 15, 2012 Author Report Share Posted January 15, 2012 Yeah. I'm gonna use plenty of bracing. 5/8s will give me enough airspace. But i will remeasure with 3/4 to see how much difference it would make Link to comment Share on other sites More sharing options...
JWBryant Posted January 16, 2012 Report Share Posted January 16, 2012 Using 3/4" you will only lose 2 cubes still at 2.76 cubes. And according to Torres you only need 9" of 4" diameter port, and that will give you a tuning of 32hz. W/o woofer displacement. If you try to add another port to save room you'll end up with really long ports. Hope this helped Basshead-in-Training Link to comment Share on other sites More sharing options...
CleanSierra Posted January 16, 2012 Report Share Posted January 16, 2012 5/8 MDF is a no-no. and i partially agree with what clean sierra said. It's a good rule of thumb, but it's not always true In that truck SPECIFICALLY it's a good idea to leave the port width from the side. I don't know how much of a footprint those SAs have breathing wise. Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
CleanSierra Posted January 16, 2012 Report Share Posted January 16, 2012 Using 3/4" you will only lose 2 cubes still at 2.76 cubes. And according to Torres you only need 9" of 4" diameter port, and that will give you a tuning of 32hz. W/o woofer displacement. If you try to add another port to save room you'll end up with really long ports. Hope this helped It's not just about tuning, it's also about port area per foot. Don't cheap those subs from port area. Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
sps1989 Posted January 16, 2012 Author Report Share Posted January 16, 2012 Ok so try to keep the port off of the sides and try to go on top? Link to comment Share on other sites More sharing options...
JWBryant Posted January 16, 2012 Report Share Posted January 16, 2012 Using 3/4" you will only lose 2 cubes still at 2.76 cubes. And according to Torres you only need 9" of 4" diameter port, and that will give you a tuning of 32hz. W/o woofer displacement. If you try to add another port to save room you'll end up with really long ports. Hope this helped It's not just about tuning, it's also about port area per foot. Don't cheap those subs from port area. Yor right. I learning too. From trying all kinds of numbers to get between 15-18 sq inches of port, and 32 hz tuning, you're either going to need 2 4.5" diameter ports, or you will have to design a slot port or change the box dimmensions. The 4" port didntt have enough port area (10.63" per foot) and the 5" ports had enough port area but the box was too small to accommadate for the long 5" ports. IMO I would go for a slot port. Basshead-in-Training Link to comment Share on other sites More sharing options...
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