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4th order box design help Rockford fosgate T3 19


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I'm doing a pretty big build on a 2012 F150 Harley-davidson 6.2 . 2 19 4th order blowthrough in bed of truck. 4 sets of Focal es 165 kx2 and 1 set of focal es 165 kx3, 2 rockford p3sd2-8 , 2 RockfordT1000.4 and Rockford t600.2, 2 rockford 2500 bd  soon to be 4 , iPad pro 12.9, Sony rsx-gs9, headunit, 3 sixty.3 and 4 batts Mechman 370 alt. As of now I have around 8 to 12 Cubs to work with .(Max dimension 21"h x 49.5" w x 24" D ,up to what is needed max would be 42") Any help would be appreciated. 

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Well you wont be doing a 4th order... you'll be lucky to get them in a normal ported box. Most 18s want 6-7 cubes net each. So 12-14. You barely have that.

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Ok so before woofer displacement and bracing min it comes out to 12.187 Cft (internal 19.5x48x22.5)single baffle also I could go (19.5×48×34.5) which would be18.6 cft which I would have room for double baffle as well as more bracing. Only issue in having is I do not want to cut out the hole back wall to allow for the bass to come through for the blowthrough. So what are my option and which is best. Do 1 and put both 2500 on one 19  and do  a 4th order or 6th. Or find a way to get the ported 2 to work. Also what we ould be the minimum needed for a 4th with 2. Thanks in advance for the help.

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11 hours ago, shredder2 said:

Well you wont be doing a 4th order... you'll be lucky to get them in a normal ported box. Most 18s want 6-7 cubes net each. So 12-14. You barely have that.

 

Ok so before woofer displacement and bracing min it comes out to 12.187 Cft (internal 19.5x48x22.5)single baffle also I could go (19.5×48×34.5) which would be18.6 cft which I would have room for double baffle as well as more bracing. Only issue in having is I do not want to cut out the hole back wall to allow for the bass to come through for the blowthrough. So what are my option and which is best. Do 1 and put both 2500 on one 19  and do  a 4th order or 6th. Or find a way to get the ported 2 to work. Also what we ould be the minimum needed for a 4th with 2. Thanks in advance for the help.

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12 hours ago, YukonXL04 said:

Well you wont be doing a 4th order... you'll be lucky to get them in a normal ported box. Most 18s want 6-7 cubes net each. So 12-14. You barely have that.

That particular sub calls for 8 cubes vented. Thats an insane amount of space.

Vented Box Volume (Vb)
8.0 cu. ft. (226.5 Liters)

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26 minutes ago, PC Principal said:

That particular sub calls for 8 cubes vented. Thats an insane amount of space.

Vented Box Volume (Vb)
8.0 cu. ft. (226.5 Liters)

I know that's where I'm am with just ported just dont wanna take out the whole back wall for opening and exposing the woofers 

 

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