View Full Version : Need help with subwoofer and box design plsss

08-10-2012, 09:26 AM
Hi guys, i need help deciding what build to go with.. i m deciding between ported enclosure or 4th order bandpass for my car which is a 1996 mitsubishi lancer sedan. I want to play lows and just make my subs play lows with authority and shake things lol I got 2 12" Earthquake DBXI subs.
I'd also like to know what my car's frequency peaks at? or how do i find this out?

look for earthquake dbxi 12 to search subwoofer specs in pdf on google.

Help me with anything you can think or or come up with? thank you :)

08-12-2012, 06:20 AM
i would aim around 4-5 cuft ported tuned to 28hz .depending on what you can fit, lancer trunk gives you little to work with . 4th order out the question because of the room required to make the enclosure operate properly.

08-13-2012, 11:39 PM
okay thanks man, so 28hz will give me low bass ? it will shake the whole car up nicely aye? :D

08-13-2012, 11:50 PM
I wouldn't tune that low at all.

Tuning is subjective to what your goals are as well as the application itself.

08-15-2012, 07:44 AM
whats the lowest that i should go with 1 15"??

08-15-2012, 07:46 AM
whats the lowest that i should go with 1 15"??

32-36. What 15" are you talking about?

08-15-2012, 07:48 AM
32-36. What 15" are you talking about?

Earthquake DBXI 15D

08-15-2012, 07:53 AM
What kind of music do you listen to?

08-15-2012, 07:54 AM
What kind of music do you listen to?

lol rap! also at times anything that is bassy and goes low and shakes stuff :)

08-15-2012, 08:03 AM
28 is pretty low but it depends on your box style too and what way you fire everything.
I have my aero ports tuned at about 35 and it still plays down into the 20s nicely and shakes some stuff pretty good. My ports fire into a loading wall/slot though.
When i fired everything forward i had to tune lower to get the sound i wanted, but if i turned the box around and fired at the rear of the car i didnt have to tune as low.

08-15-2012, 08:06 AM
What is this firing thing that your talking about?? i'll probably go with 30-32hz ... still deciding, btw how many cuft box would i need and is 3.5" slot port too much?
box dimensions atm is
W = 28
Depth top and bottom = 22
H = 16

08-15-2012, 09:26 AM
Ive never used those subs but 3.5-4 cubes for a si gle 15 would probably be good.
By firing i mean what way you face the sub and port in your car.
Your box internally is 14.5 so your port would be 14.5x3.5 if you used a slot port so around 50sq inches of port.
Lots of people go with around 12-16" per cube for a slot so you would be in thay range with a 3.5-4 cube box.

08-16-2012, 08:48 AM
I'll have to seal it off if i put it facing front right? but it sounds pretty loud when i face subs at the back :)

i was just wondering if 30hz would be fine for a single 15"?
its rated at 750w rms and 2000w max
lol i'll be giving it 1000w rms @ 2 ohms

i just hope it'll be good on lows or do i need more cone area? as in more subs?? or should a single 15" be enough?

does sub facing front sealed off vs facing back make a difference?