blow thru

im going to put 2 12s in a blow thru on my 94 toyota and was wondering what i need. how do i seal the bed to the cab? whats the best box type ported or sealed? any pics or advice would be great thanks

i would do a ported box if you want it loud, a sealed tends to give a little better sound quality but not as loud, but keep in mind ported boxes have to be much larger, and i would definatley reccomend a slot port, rather than a cheap plastic round port, less port noise/whistle and better sound quality, as far as sealing the cab to the bed, get some accordian boot, you should be able to get it at any place that sells truck caps, it is basically a picnh mold on the inside and outside lip so it will pinch to the cab and bed walls

do u have any diagrams for a slot port box. i have onlt ever built sealed boxes and imm not exactly sure how to build a ported box

go to the camper store and get an accordian boot to seal it. That way it will flex between the cab and bed and seal it from water. http://img.photobucket.com/albums/v103/Sandog/100_1076.jpg

you would be better off doing a bandpass-portthru in your truck. you get a smaller hole and can be up to 3 times as loud than a sealed box with the same power and woofers. the down side is these boxes are not for the first time builder. If done wrong you will shread woofers.

oh yeah. a bandpass for two 12's is around 17" x 17" x 36"'s. depending in woofers.

Would agree that a bandpass is the way to go. Did a truck with six 12s bandpass but the box wasn't right. We redid it with four so he could have more room and it was just as loud if not louder than the six. It's all in the design.

does anybody have a web site or something i cant get directions to build a bandp** cuz im not 100%how to build one thanks again

Edited: 9/12/2005 4:48:40 PM by ohsolomazda

Edited: 9/12/2005 4:48:22 PM by ohsolomazda

Originally posted by moto14420003



does anybody have a web site or something i cant get directions to build a bandp** cuz im not 100%how to build one thanks again

try calling the manufacturer of the subs you are going to run, they should be able to give you the exact air space that the subs will need so you arent just guessing with some measurements that someone threw out to you, then you are tuned to exactly what your subs should be tuned to, i would still really recommend a slot port over a bandpass simply because of the noise that the plastic bandpass ports create, and if you have a shop around you that has a slot port box, you should check it out, they sound great, what kind of subs are you planning on running? i may have something that will work for you depending on where you are, since this box is pretty heavy 3/4 mdf slot port dual twelve box, that way you could just build some beauty panels around it and it would be a million times easier for you email me at drpdmazda@verizon.net

jlaudio.com has lots of good info in their tutorials section.you can also build the slot ports in a bandpass out of wood. just convert round ports to square ports