I'm thinking about making a box for some older Rockford RFP1408's that I have, they are 200 watts RMS each, the only wood I have is a 30"x60" sheet of 1" MDF and another smaller sheet of 3/4" MDF. So, I'm gonna use the 1" sheet for most of the box, and the small 3/4" sheet for the front.

1.25 Cubic feet

1" x 11" port tuned to 33hz

What do you think?

i get slightly different numbers for tuning and net volume with those dimensions. exactly how long is the port? i have 23" for 33.08 hz tuning. that gives almost exactly one cubic foot of space of net volume. wont really be an audible difference...just curious

on another note, that port is very thin. you may get some port noise with a port that thin. i'd do a 2" x 5.5" port before a 1" x 11" port. looks like the subs will be a tight squeeze in that box, as the sides are in the way of the cut out as well. i'd use 3/4" wood for the box unless you dont have enough and dont wanna buy more. a box that small doesnt really need to be 1" thick imo. with everything 3/4" thick, and those same dimensions i get almost the exact same results as you have in your post, and i'm sure the speakers will fit a lil better as well.

you didnt say where this is gonna go, but can you resize the box just a tad to better fit everything?

i get slightly different numbers for tuning and net volume with those dimensions. exactly how long is the port? i have 23" for 33.08 hz tuning. that gives almost exactly one cubic foot of space of net volume. wont really be an audible difference...just curious

on another note, that port is very thin. you may get some port noise with a port that thin. i'd do a 2" x 5.5" port before a 1" x 11" port. looks like the subs will be a tight squeeze in that box, as the sides are in the way of the cut out as well. i'd use 3/4" wood for the box unless you dont have enough and dont wanna buy more. a box that small doesnt really need to be 1" thick imo. with everything 3/4" thick, and those same dimensions i get almost the exact same results as you have in your post, and i'm sure the speakers will fit a lil better as well.

you didnt say where this is gonna go, but can you resize the box just a tad to better fit everything?

Well the only thing I have is 1", I have a small piece of 3/4" I can use for the front, I made the box using RE Audio's L Port calculator, and then I drew it in Google Sketch-up.

I'm not really sure where it's gonna go either, either in the trunk of a 95 T-Bird or the back of a 93 Suburban, I'm not worried about the sides being in the way, because the subs are really small and I made the cut outs a little big in sketch-up anyways.

Here's what I get with your calculator.

And here's what I get with RE's.

Edited June 27, 200916 yr by TRiPP3R