need help designing new box for maw15s

[Rawr-DQ 10+ year member]

Ahh with that alls I could really do is guess, your best bet is to fill it with peanuts and use cardboard panels to represent the box...and a cube or something to measure the peanuts and the volume.

 

[meistah 10+ year member]

i made it all into squares and found the cubic feet of each one..total space of the area i showed is 4.5cuft, assuming 13.5" height

 

[Rawr-DQ 10+ year member]

ok, lemme see what I can figure out design wise, as for the walls and all, that is up to you.

 

[Rawr-DQ 10+ year member]

Box Properties

Name:

Type: Vented Box

Shape: Prism, square (optimum)

Vb = 3.5 cu.ft

Fb = 34.91 Hz

QL = 5.953

F3 = 41.37 Hz

Fill = heavy

No. of Vents = 1

Vent shape = rectangle

Vent ends = one flush

Hv = 7 in

Wv = 7 in

Lv = 20 in

You got to use a lot of heavy fill otherwise it wont hit low for crap, yet still it wont hit low very hard cuz it peaks at 60hz

ugg, this sub isn't a good ported, it'd sound better in a 4 cube sealed/.5 lost from displacements.

design wise it is very hard to do from here, you'll have to work it out yourself, just brace open parts and double up the baffle.

good luck with these speakers.

 

[Rawr-DQ 10+ year member]

...go ahead and try it ported if it doesnt sound good, seal off the port and walla a sealed box.

 

[espguitarist91 10+ year member]

ported sounds fine, trust me. I went with 3.1 cu. ft, supposed to be tuned to 32, but i screwed up on the port and its now tuned to about 28. Its loud, low, and accurate. And it still hits the higher frequencies(60-80) fine.

 

[meistah 10+ year member]

ok, so i can do 27x30.5x13.5...giving me 5.1cuft before displacement...that seems like the best plan, as its alot more space than before and its an easy build...would that be adequate for a ported box? or should i just stick with sealed

 

[Rawr-DQ 10+ year member]

what is the height/depth/width

 

[Rawr-DQ 10+ year member]

Ok....assuming 13.5 is the height, 27 is the depth, and 30.5 is the width...(exterior dimensions)

using 3/4" mdf...

For the vent...

depends on what you want...it will be 12 height 4 wide (inside dimensions)...you can make it....

12x4x10 for 40.8hz

12x4x17 for 35.24hz

12x4x30 for 30.3hz

12x4x52 for 27.89hz

I recommend 12x4x17 for ease and tuning~

Box Properties

Name:

Type: Vented Box

Shape: Prism, square

Vb = 4.091 cu.ft

Fb = 35.24 Hz

QL = 5.73

F3 = 39.39 Hz

Fill = heavy (poly fill)

No. of Vents = 1

Vent shape = rectangle

Vent ends = one flush

Hv = 12 in

Wv = 4 in

Lv = 17 in

 

[Rawr-DQ 10+ year member]

as for the cuts, it depends on the way you want to do it, one side will over lap and will come out to w/e depth/width/height you use (13.5/27/30.5)

the other side will lose 1.5"s if you use 3/4" mdf..if you did the top and bottom 27x30.5, the front/back would be 12x29 or 12x30.5...then the sides would be 12x27 or 12x25.5.....just depends what side you want to overlap for the extra strength/baffle...something along those lines....

got it?

more pics =p

...I guess I recommend doing the:

top and bottom 25.5x29 (x2)

front/back 13.5x30.5 (x2)

sides 13.5x25.5 (x2)

tell me what you want to do and I'll work out the port/ect cuz I dunno where you want the port and subs, it all depends on what side will be the baffle.

I was kinda thinking you'd do it the way most people would, but I didn't think about firing up, I was thinking firing back or forward.

 

[meistah 10+ year member]

well the subs will be upfiring like they were before, don't know where the port would be best located...not sure which port i want either, to be honest i barely have any experience with ports and whatnot, ive built a few boxes but all of them have been sealed, will probably want a low tuning as i really want it to pound the low notes.

i dont really care what the cuts are, i can just figure it out at work as to whatever is easiest to get out of the sheet of mdf.

it would be really sweet to get a 3d drawing of the box with port placement and everything... more pics will come once i get this all figured out //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Rawr-DQ 10+ year member]

if you want it to hit low, go with a sealed box.

The ported box even when tuned low is not going to hit low, not with the space given, it just cant do it. If you go ported it'll be louder but it's going to hit high whether you like it or not.