Jeep TJ unlimited box design
#1
Jeep TJ unlimited box design
Ive got a 2005 Jeep TJ unlimited Rubicon. I know its not the greatest vehicle to design a sound setup for, but i love it for more reasons than that.
Im looking to design a ported subwoofer box for 2 12" subs, firing to the floor. it will be placed behind the rear seats.
My jeep is an Unlimited, it has a 15 inch longer wheelbase, which gives me these dimensions to work with behind the rear seat:
33.5" wide, 23" to the top of the seat and 21" deep
Im hoping for the box to be around 3 cubic feet.
does anybody have any design insight?
anyone else with subs in their jeep?
Im looking to design a ported subwoofer box for 2 12" subs, firing to the floor. it will be placed behind the rear seats.
My jeep is an Unlimited, it has a 15 inch longer wheelbase, which gives me these dimensions to work with behind the rear seat:
33.5" wide, 23" to the top of the seat and 21" deep
Im hoping for the box to be around 3 cubic feet.
does anybody have any design insight?
anyone else with subs in their jeep?
#5
Thanks Dukk, Im gonna try and build a 3D model on my computer when i have some time, then ill post the renders up here when i get that finished. This is the first major enclosure Ive built. Now i just have to pick out some subs and and amp! any recommendations? (Looking to get some bang for my buck)
#9
Okay, here it is. Ive chosen to use 2 Cerwin Vega VMAX 124 subwoofers, powered by a Rockford Fosgate 1000W RMS amp im going to build the box with both the subs and the vent pointing downwards. Id like to tune it to 33Hz.
Cerwin Vega recommends a 1.75 cubic foot box for each subwoofer with a 4 inch diameter X 7.5 inch length port. although on this design i'd like to use a slot port.
I have a couple of Questions. I have tried to use winISD to design this, but it doesn't make a ton of sense. Its hard to make sense of what the relationship of port length and diameter is according to winISD. Is there any insight that i can get on designing ports? am I just looking for a target volume or a specific air speed as it comes out of the port?
Also, for building a two-sub box, can I just multiply the target volume for 1 sub by 2? or is there any other recommendations? Would you recommend 3.5 cubic feet in my situation, or would you recommend more or less? ive got some room to work with
another question, I cannot build the box to the dimensions that are considered optimum by winISD. how do i keep my frequency tuned to the 33Hz that I want?
Also, is there any other ideas you guys can shoot at me?
Cerwin Vega recommends a 1.75 cubic foot box for each subwoofer with a 4 inch diameter X 7.5 inch length port. although on this design i'd like to use a slot port.
I have a couple of Questions. I have tried to use winISD to design this, but it doesn't make a ton of sense. Its hard to make sense of what the relationship of port length and diameter is according to winISD. Is there any insight that i can get on designing ports? am I just looking for a target volume or a specific air speed as it comes out of the port?
Also, for building a two-sub box, can I just multiply the target volume for 1 sub by 2? or is there any other recommendations? Would you recommend 3.5 cubic feet in my situation, or would you recommend more or less? ive got some room to work with
another question, I cannot build the box to the dimensions that are considered optimum by winISD. how do i keep my frequency tuned to the 33Hz that I want?
Also, is there any other ideas you guys can shoot at me?
#10
That vent CV recommends tunes the box to 43hz. A little high IMO. You want something more like 14" in length.
As the vent gets bigger (more area) it will also get longer for the same tuning frequency. Ideally you want to keep port velocity below abut 100feet/second.
If you keep the box to the same volume, the shape does not matter so much.
As the vent gets bigger (more area) it will also get longer for the same tuning frequency. Ideally you want to keep port velocity below abut 100feet/second.
If you keep the box to the same volume, the shape does not matter so much.