box dimensions for 15 fi sp4

[Jamie Hebert 0]

need dimensions on a box for a 15 fi sp4. website says 3,5 cu ft but other people are saying go 4 cu ft. really would appricate it

[muddybass 13]

how much room do you have to work with? what are you running to it? the sp4 will move a lot of air so port area needs to be right

[emh9009 199]

For someone to be able to design you a box you first need to list the dimensions of the max area you're able to give up in your vehicle, for obvious reasons.

[aimone 4]

im running an sp4 15 on an saz-1500. from what i read big power = smaller box andl low power = small box. fi says between 3.5-5 ft^3. mine is in 4ft^3 after displacements w/ a slot port tuned at 33hz. my problem is my electrical its all stock other than big three. i pulled a 140.2 on music sealed on the dash, sub firing into the car not sealed off, had amp gain dialed back due to failing alternator at the time.

 

since then ive got a new alternator and battery but still stock, tuned the amp back up, and have the sub firing into the trunk which made it a completely different animal. its louder, lower, and tearing shit apart. 

 

post up some measurements of available space and ill get you measurments of my box tomorrow