need help on box...

[K&c Customs 10+ year member]

ok this is my first box i built....

i debating on ported or sealed for my 2 15 in L7's

i got most of the box built..

its is 20 inches deep and 20 inches tall and 40 inches wide...

if i port it how long should the port be if i want to tune it around 35 hz?

its 20 inches deep...

im just going to go with one port for both subs if i port it..

maybe like a 4 or 6 in port... which would yall suggest?

i need do know what to do?

how will sealed sound being that big?

how many cubic feet is the box if its 40 inches wide, 20 inches tall and 20 inches deep?

please help

its going in a jeep cherokee

Click to read more...

 

[K&c Customs 10+ year member]

help

 

[photocrazy8 10+ year member]

are those 40 x 20 x 20 specs inner or outer?

 

[benvaldi88 10+ year member]

GO PORTED http://www.carstereo.com/help/Articles.cfm?id=31

 

[photocrazy8 10+ year member]

also which subs are they. the silver ones, or the newer grey ones?

 

[mikeyboc 10+ year member]

x2 on going ported. But we need to know if the specs are inner or outer as stated above. For future ref., always, always know what you are building before you start. It will save you time and money in the long run.

 

[K&c Customs 10+ year member]

outer

 

[K&c Customs 10+ year member]

outer side of the box.. the 02 models

 

[photocrazy8 10+ year member]

38.5 x 18.5 x 18.5 = 13176.625/1728 = 7.625

so you have about 7.63 cubes gross to work with

 

[photocrazy8 10+ year member]

outer side of the box.. the 02 models

do you know the disp per sub?

 

[PV Audio 5,000+ posts]

That's far too much room for sealed as it is, so what i'd do is just get some PVC or aero ports and use them to port it since u didn't calculate that in the beginning.

 

[K&c Customs 10+ year member]

no.. i sent them off to kicker so im not sure if they will recone them or just send me 06 models.. so lets just go with the 06 models.... is that a lot of cubic feet?

 

[K&c Customs 10+ year member]

so lets go on by the 06 model specs....

so how many ports should i have and how big should the pvc be and how long?

should the subs sound good in this box?

 

[photocrazy8 10+ year member]

ok so .16 disp per sub subtracted from the 7.63 leaves you with 7.31 to play with b4 port. which is 3.66 per sub which is a lil on the small side...

any one else please check my math...im running on 4 hours of sleep //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[K&c Customs 10+ year member]

so how will they sound?

how long should the pvc be? and how many 1 or 2? how big 4 or 6 inch?