View Full Version : Hopefully a quick question

10-07-2007, 06:17 PM
I'm about to build a box for my type-r that i just bought but I have a few questions. This is the first ported box that I am going to be building and I know kind of what to do but I kind of don't. First off,
-whats a 15 type-r's xmax? (cant seem to find it)
-how much port area do you recommend?
I'm going to tune it to around 35hz. The next problem that I am going to encounter is that my box is around 3.5 cubes but it is going to be odd shaped (in a truck) so to give you an idea of what I am thinking here:

/ |
/ | 24inches long
/ |
sub----- / |
/ 21in | 20in
/ |
/ |
port- / |
/ _____________


I just want an idea of what kind of port options i am looking at also. Thanks

10-07-2007, 06:20 PM
****.....well it didn't work....but anyway
The box is 10 in on top, 20 high,15 in on bottom and the slant is 21 in, and 24in wide if that helps any (prolly not)

10-08-2007, 01:48 PM
MSpaint is your friend. Google sketchup is your best friend though. The Type-Rs xmax is found in the manual which can be found on Alpine's website. I believe it's close to 20.5mm though.

10-08-2007, 05:53 PM
Will probably be easiest to use an aero port...

10-08-2007, 06:46 PM
Will probably be easiest to use an aero port...

thats what I was kind of leaning towards.....but i'm still not sure of the placement of the port