which of these looks better?

[bumpinTL364]

I'm building a box for my girl, and have designed a pair, one aeroported and the other slot ported. These are going to be for a memphis power reference 12" woofer. Memphis gives an optimal ported box volume of 2.25cu ft, port area of 18.75sq in, and port volume of 318cu in. These specs tune the box to 38hz though, which is too high. I'm shooting for 32 hertz.

First is the aeroported box, 2.4cu ft and a 3in aeroport which is 5.56" long. gives me 7sq" of port area and 39cu" of port volume. This seems a lot too small, but i used two different calculators and both said this would tune me to 32hz.

By toml364 at 2011-12-18

Second is the slot port. used the RE Audio box calculator. Box volume is 2.75cu ft, port area is 36sq" and port area is 1,060cu ft. Tuned to 32 hz again. Can't decide on the best place to mount the woofer on this box. should i put it in the center of the front panel like it is, push it over next to the port so it's in front of the rear port wall, or over to the other side so it fires directly to the port (and doesn't hit the wall)

By toml364 at 2011-12-18

Thanks for lookin!

[MIKE-2U]

I hava been hearing the RE box calc. is off on design and specs. I use a guy " spencerearl1996 " on d4s.com forum and pay him $10.00 and gives you all the specs and cut out sheets. Im sure there is a box builder on her that does that. Also i started using aero ports, i don't think i will ever go back, just like the feel and sound of them, but thats just IMO.

[ChevyBoy95]

go 2 4in or 2 3in pvc/aeros. 1 isnt enough, especially a 3in.

[bumpinTL364]

chevy, do you know how long each aero should be?

[bumpinTL364]

I'm using this box calc: http://www.mobileinformationlabs.com/HowTo-1Woofer-Box-CAL%20Port%20lenth%201.htm and having 2 4" aeroports it says i need 24" length. should i assume that's per each port, or in total?

[ChevyBoy95]

yea, that is per port. what are your box specs?

L:

W:

D:

wood thickness:

[bumpinTL364]

aeroported box is 28.25" wide, 14.25" tall, and 10" deep and using 3/4" MDF. i could fit in the aeroport width wise but because the box is going into a trunk i want everything rear-firing

just btw max box dimensions are 36" wide, 18" tall, and 16" deep which is more than enough room for this woofer. Just want to box to look somewhat clean when i get her in there

Edited December 19, 2011 by bumpinTL364

[ChevyBoy95]

CHECK BELOW, REVISED

Edited December 19, 2011 by ChevyBoy95

[ChevyBoy95]

thats what i came up with...

[bumpinTL364]

thanks. the port is only 4" longer than the RE box told me to use, but the rest of the box is bigger.....any way i could transfer those port dimensions into aeroports? thanks for doing that for me too, I owe ya one.

EDIT: i might be wrong, but shouldn't there be a value for # of common port walls? i feel like i saw that causing the cal to be wrong for someone else, but I just wana check and make sure.

Edited December 19, 2011 by bumpinTL364