View Full Version : need help designing new box for maw15s

05-03-2007, 09:19 PM
hey, I currently have 2 mach 5 maw15s in a 3.5cuft sealed box.

However it doesnt use the trunk space very well, as there is alot of wasted space it seems, and the subs could definitely use a larger box.

So i want to build a new one that uses up as much as, if not all of the trunk if i can, which is going to mean its gonna have to have some angles and stuff to accomodate the trunks shape.

The car is a 92 eagle talon, i can get the exact measurements of the trunk if necessary. I was thinking a sealed box as i probably wont have room for a proper ported one, but if i do that would be sweet as well

05-04-2007, 02:09 PM
you may have best luck building the box inside the car. this way you can really maximize the space and possibly port it too.

05-04-2007, 05:00 PM
Which is an absoulute ***** to do....Ask Magick Man and his recent build lol and try to talk him into helping you with yours unless your skilled enough to do it

05-04-2007, 11:19 PM
yeah, i was thinking of building it in the car...ill prolly have to do some of it in the car, but maybe i could do the bottom and sides and put that in and then put the top on when its in the car or something...right now im just looking for a good design, and im willing to pay a buck or a few for the design i end up using

05-07-2007, 12:23 AM
still lookin for someone to make me a box design....
if money doesnt interest you i can trade design for a few nsfw pics of a girl or 2 i know:yumyum:

05-07-2007, 12:43 AM
PM pics please, nudes if any :)

Driver Properties
Name: MAW15
Type: Standard one-way driver
Company: MA Audio
Comment: MAW series
No. of Drivers = 2
Mounting = Standard
Wiring = Parallel
Fs = 19.7 Hz
Qms = 4.98
Vas = 12.36 cu.ft
Xmax = 0.276 in
Qes = 0.61
Re = 3.4 ohms
Le = 0.8 mH
Z = 4 ohms
Pe = 700 watts
Qts = 0.54
1-W SPL = 91.2 dB
Box Properties
Type: Vented Box
Shape: Prism, square (optimum)
Vb = 6 cu.ft
Fb = 34.48 Hz
QL = 5.964
F3 = 34.68 Hz
Fill = heavy
No. of Vents = 1
Vent shape = rectangle
Vent ends = one flush
Hv = 8.5 in
Wv = 8.5 in
Lv = 15 in

05-07-2007, 12:54 AM
Those subs dont like ported enclosures all that much...as for a sealed, the smaller, the higer the output at 50-60 hz, then it drops pretty fast going down to 20-30...

I really dont know what to do for you...you can just wing this box making it 5-6 cubes if you got the space, maybe try some polyfill, then you'll get more lower end responce out of the box.

The ported enclosure will give you more output, but the curve is not very flat, it's kinda peaky, but it did not seem too bad. Just fill it up with polyfill.

05-07-2007, 01:22 AM
thanks, but im looking for specific dimensions, ive already done up all that stuff with bassbox... and like a 3d rendering or something. ive seen em done up for a couple ppl before...
however i sent you a couple of the pics Rawr, thanks

05-07-2007, 05:28 PM
Well because the trunk was so complex, I figured I could give you a target volume, and a port size, so that you can work around the trunk.

I'd need a lot of measurements to figure out the best way to use the space in your trunk, and doing that over the internet is a pain.

How many cubes do you have in the trunk? roughly?

05-07-2007, 05:29 PM
I could use some pics of the trunk too...you interested in doing any fiberglass?...got some peanuts?

05-07-2007, 10:20 PM


theres 2 old pics i took when i first got the car...ill go get some exact measurements of everything and put them on those pics so you have a better idea...not interested in fiberglassing tho...and i have lotsa insulation to stuff the box...and im sure i could get peanuts

05-07-2007, 10:38 PM
I bet two dollars that the candy is still there.

hmmm so it's a hatch back...that makes it much much easier to put a box in there...the problems with trunks is that the opening is a lot smaller than the trunk.
Oh and I was talking abotu packing peanuts that you find in boxes for shipping.

05-07-2007, 11:14 PM
lol, no i cleaned it, that was when i got it the first day...yeah its a hatch...havent found a 92 eagle talon that isnt, lol...o yeah, i knew what you meant about packing peanuts, im sure i can get lots of them from work, i just figured i could use the insulation i already have

05-07-2007, 11:27 PM
I just meant packing peantus for measuring volume...just incase you thought about glassing it, the wheelwell.

So how much space you got availible

05-09-2007, 08:41 PM
i went and measured the trunk today, this is what i got...however i noticed that i would prolly get alot of extra space if i took the floor out and the spare tire, which i might consider if i cant get an adequate box out of what i have...


05-09-2007, 11:20 PM
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.

05-10-2007, 01:54 AM
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

05-10-2007, 05:38 PM
ok, lemme see what I can figure out design wise, as for the walls and all, that is up to you.

05-10-2007, 05:56 PM
Box Properties
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.

05-10-2007, 05:58 PM
...go ahead and try it ported if it doesnt sound good, seal off the port and walla a sealed box.

05-10-2007, 06:08 PM
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.

05-10-2007, 11:53 PM
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

05-11-2007, 01:00 AM
what is the height/depth/width

05-11-2007, 01:14 AM
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
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

05-11-2007, 01:19 AM
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.

05-12-2007, 12:24 AM
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 ;)

05-13-2007, 11:33 PM
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.