Box Help (Build Stopped Til I Get Confirmation)

[Lbox88]

Tried the mock up and there's no chance of it fitting in through the back unless it was at least an inch smaller in every direction. Kinda thinking about doing 2 identical but separate boxes:

Option A: Sub up L-port up

Box: 16h * 30w * 16d

Port: 14.5 * 2.25 * 22

2.74 ft^3

33.94Hz

Port Area: 32.63in^2

11.91Port area per foot

Option B: PVC Port on end, sub either up or on the opposite end

Box: 15h * 30w * 15d

Port: 2 @ 4" x 19L

2.53 ft^3

34.00Hz

Port Area: 25.12 in^2

9.93 Port area per foot

Port area values are a lot lower on these, but I couldn't get the tuning right if I went larger. Please leave some feedback if you've read this far, lol.

[727Designs]

With a PVC or Aero port 8" or bigger is fine. The L port is not enough port area. Is that net or gross on the airspace?

[Lbox88]

Net volumes. I was told anything with a port area per foot > 10in^2 was good? I saw that the port area was just under the range on the L-Port design, and an 8" port gave me some pretty high tuning numbers, lol.

[727Designs]

Net volumes. I was told anything with a port area per foot > 10in^2 was good? I saw that the port area was just under the range on the L-Port design, and an 8" port gave me some pretty high tuning numbers, lol.

With an aero port as long as your over 8 in^2 per cube your fine. Slot's need 14-16 in^2 per cube.

[Lbox88]

Thanks for your help man, shit is giving me a headache but I'm determined to build this myself. I'll run some more numbers tomorrow and see what I can come up with. Bought 8 cardboard boxes and only used 2 so far, will definitely have no trunk after these subs, but I only want to build the boxes once.

[Lbox88]

So, this one should work then:

And if I make two mock ups of this and they don't fit.... Ima just say screw it and make one box at 14h x 28.5w x 16d with 2 sealed chambers so that each sub gets exactly 1.2 cubes and call it good till I go to put these in my next car. Sealed will prolly sound terrible though lol. Idk actually, that may not be such a bad idea since the bass would be tighter and not as boomy and I would be listening to more rock again. But it would definitely be quieter. Might also have to use 1" instead of 3/4".

[Lbox88]

Tested the mock-up today and it finally fit. I was looking at the RE portion and realized that I think I messed up the port length 2 size. IDK, it only messes with the tuning by about 1.5 Hz or so. If everything is set up right above with L2 as 16 1/8, I should have a cut list like this:

Top: 32" x 15.5"

Bottom: 32" x 15.5"

Right: 14" x 14"

Front: 28.5" x 14"

Left: 14.75" x 14"

Back: 32" x 14"

Port L1: 11.25" x 14"

Port L2: 16.125" x 14"

Then do it all over again for box 2.

[Lbox88]

I have the first box half built, but am screeching to a halt til I have a confirmation.

[Katt]

Screw the box, Wall it! hehe.

[Lbox88]

Bump for help? T3 suggests 20 in^2 of port area by 16" deep for 320 in^2 = 0.185185185 ft^3. If I make a box 14*32*26 with a port 12.5*3.25*13.5, I get a net volume of 4.62 ft^3, 40.63 in^2 of port area, 0.47 ft^3 of port volume, 8.79in^2 port area per foot and tuning of 34.09 Hz all after sub displacement. Probably too small, but it seems to match T3's specs as far as I can tell and if I can fit this into my trunk with subs and port forward then I'll be happy. I can also salvage what's left of the MDF I have to be able to do it without having to buy more.

Edited July 13, 2011 by Lbox88