Box Construction

[AHScomets87]

Here's the deal, I got two 10" Kicer Comp VR's and I wanna make a custom box for them. They're going to fit behind the seat of my 1959 Chevy Apache, so the box would have to be quite then, just enought to fit the subs in. All I wont to know is if I can port the box? I'm not really sure if it will help at all or if it's even possible. If you know anything about box construction and porting boxes, let me know if it will work or sound good

[Eduard_alfasud]

man, people here seem pretty unhelpful to beginners in this department, i am having trouble finding out about venting as well.
I dont have the know how to give you any advice, but this article has some info. you should read on speaker boxes etc.

[mikee12345]

link

read that site on sealed and ported boxes

then

link 2

[454Casull]

Download WinISD Pro. It's extremely easy-to-use and predicts the frequency response with respect to box size, cone mass, port diameter and length, etc.

http://www.linearteam.dk/default.aspx?pageid=winisdpro

[asauer]

BUT, WinISD can only be used to determine port length with the desired box size and port cross-section area given.
In a car audio environment, the response graphs are completely inaccurate.
Say a sub with a 2ft^3 box with a 4" dia. port has an F3 of 33Hz on the response graph...
This value should be thrown out the window for car audio, the cabin gain will make it very hard to predict.
Pretty much just put it in and try it. If it's a regular cab truck with a tiny box, sealed is your only hope. I'd shy away from tiny ported boxes, as they won't provide any help in the low end.

[offroadbum]

are you going to build this box your self?
are you wanting pounding bass?
how much of an amp (power and brand) do you have?
how much room behind the seat,is the gas tank mounted back there??
if you can answer these questions i might be able to draw you up some plans.

[AHScomets87]

The tank behind the seat is removed and mounted underneath the bed. Alright I got 2 10 inch kicker Comp VR's. I'm looking into getting the JBL 600.1 or maybe then 1200.1 just depends on what deal I can find. Yes, I want that pounding base so when you stop you look over at my car and like, DAMN that's a loud system, I heard that from a mile away kinda thing. I will build the box myself, with the help of my friends brother who works at car toys who does all that kinda stuff, installation wise. My truck is in the shop right now because we're getting a new transmittion, but I'll give you the demensions of the back seat space whenver I get the chance. THanx for the help

[offroadbum]

let me know when you get it back.
i`ve got the basic design.
we just have to change a few measurments.
the last we put in a s10 with some cheap kickers(10`s).
got a first place with a 160db`s.hard hitting little box.
and you don`t have to let the seat up........thats a big deal
for me i over 6'.

[theChris]

you may be able to. not sure if you have any clearance, but you can port under the seats. this may mean 2 long ports with bends. but the idea is to max out the volume of the box, then use the unused under seat volume for the port. nowdays you have power seats which eat up all the clearance.

for extra peak SPL you will want shorter ports with more area. for more depth you will want longer ports, but port area should still be up.

more power = more needed port area. more box volume = less needed power. this is why comps usually get big box woofers in gigantic boxes with tons of port area and even more power. if you want to use small box woofers, they have to scale well, if you gotta put in an extra 500W to get 3dB, you want all 3dB, and not 2dB.

[offroadbum]

get your truck back yet??