Box design for a level 3 18

[soundsystemaniac]

so ive got this, and i know the box dimesions are not what the sketchup shows, but the airspace is correct.

my concern is, will the sub magnet being so close to the port be bad? because if i shorten the port, it only raises the tuning.

and i have heard that using aeroports is more efficient but this is a budget build so id prefer to stick with the slot (free) ports.

and this is the biggest box that can fit in the trunk with the box still being removable.

Any input would definitely be appreciated

[Autruche]

I'm all sorts of confused... DC doesn't even make 18 inch level 3s...

[Supercharged DCs]

Yes they do

[soundsystemaniac]

yep they do...ive got one on the way!

[matt402]

id keep about the same port area but make the port shorter & wider.

[soundsystemaniac]

id keep about the same port area but make the port shorter & wider.

well i tried doing that but the tuning rose to like 38.xx ...? why is that?

[matt402]

if the port area is the same it shouldnt change...

18x5.25 should still be 94.5" of port area, try that.

Edited June 19, 2011 by matt402

[soundsystemaniac]

so what exactly is port area then?? im missing something cuz i though port volume and area are the same???

cuz i tried making it shorter and wider and this is what happened..

Edited June 19, 2011 by soundsystemaniac

[RAM_Designs]

The height to width ratio does make a little difference. The more square the port is, the shorter it can be for the same tuning.

[soundsystemaniac]

The height to width ratio does make a little difference. The more square the port is, the shorter it can be for the same tuning.

alright. ive been messing with this thing for hours lol.

do you guys have any opinions on how i could tune this lower given the fact that i cant make the port any higher because of the sub basket or deeper because of the sub magnet and the fact that thats the max airspace i can have