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SV.Gato
09-07-2008, 01:48 PM
I am about to design my first box which I plan on placing in the rear hatch floor of my Dodge Magnum. So this setup will be facing the roof. That being said, is bigger really better? Putting asside the quality of the subwoofer and the design of the box, what is the difference between say a single 15" and two 10"? Which one would one sound better? I even read where someone had three 8" subs and swore that it absolutely pounded.

I understand that much has to do with the quality of the sub, amp, and box design...even the placement of the box; however, in a nutshell...would you A/V gurus please explain how size factors into all this?

dragnix
09-07-2008, 01:49 PM
size of the sub? More cone area=more volume displaced

brtnboarder3241
09-07-2008, 01:51 PM
sub or *****?

adam_merseal
09-07-2008, 01:53 PM
Bigger boxes will usually produce a deeper sound. Smaller boxes will produce a tighter bass. The way I see it is if you are wanting SQ go with a smaller sealed. If you want SPL use a medium to big ported. Like you said though...it really does depend upon the displacement, sub, and type of box.

jbizzle
09-07-2008, 01:53 PM
sub or *****?

Both? :confused:

G0NGSHOW
09-07-2008, 01:58 PM
anyone please correct me if i'm wrong, but from my understanding, it comes down to overall cone area. so find the area of the cone (Pi*R^2) for a 15 it's ~706.85 in^2. Now for 2 10's its ~314.16 in^2 per sub so that means ~628.32 in^2 total. so in this case the 15 would have more cone area, which means it can move more air which would create a higher SPL. And this is assuming that you have enough cabin space for the sub(s).

thorshammer1
09-07-2008, 03:00 PM
I prefer 10's.

groundpound4200
09-07-2008, 03:08 PM
I prefer 21"s :crazy:

DDSC
09-07-2008, 03:09 PM
just get one 18 in a large sealed box and call it a day

azimuth
09-07-2008, 03:10 PM
i prefer 3 inch subs

azimuth
09-07-2008, 03:13 PM
20 of these would be tight
http://www.partsexpress.com/pe/showdetl.cfm?&Partnumber=264-877

Rashaddd
09-07-2008, 03:20 PM
anyone please correct me if i'm wrong, but from my understanding, it comes down to overall cone area. so find the area of the cone (Pi*R^2) for a 15 it's ~706.85 in^2. Now for 2 10's its ~314.16 in^2 per sub so that means ~628.32 in^2 total. so in this case the 15 would have more cone area, which means it can move more air which would create a higher SPL. And this is assuming that you have enough cabin space for the sub(s).

Don't forget that a good portion of the overall diameter of the speaker isn't useable cone area

go based on the SD parameter given (actual useable cone area)

Also, you aren't multiplying correctly...exponents are multiplied out before products

so if the actual useable diameter was 15", you'd do (7.5^2)*Pi which gets you 176.6 in^2


Edit: just noticed you actually were multiplying correctly..just remember R is radius, so use half of the diameter

helotaxi
09-07-2008, 04:11 PM
Multiple smaller subs will usually sound better and can potentially get louder on a given amount of power due to reduced cone travel and reduced power compression.

iwearpro
09-07-2008, 09:25 PM
This weekend In at a spl comp there was a guy with 4 dd 8's hit 154 and some change...

80INCHES
09-07-2008, 11:41 PM
to the thread starter
wat sub r u using and how much power r u goin to use...
cuz depending on the sub determinds how much power u need
if go with 1 15 in a small box u will need more power to achieve the same output of the 15 in a bigger box with less power theoretically speaking.
personall just do 1 15 in 3.5 cubes ported with 60 square inches of port tuned to 33hz..and if ur doin 2 10's do 3cubes ported with 50 square inches of port tuned to 35 hz
80

helotaxi
09-08-2008, 09:35 AM
^^^That's pretty arbitrary considering that you don't know the make or model sub...

G0NGSHOW
09-08-2008, 10:25 AM
Edit: just noticed you actually were multiplying correctly..just remember R is radius, so use half of the diameter

whoops haha, in a hurry didn't think that through

chunky cumz
09-08-2008, 10:27 AM
I prefer 21"s :crazy:

**** while we are at itI wouldnt mind having a 45" either

helotaxi
09-08-2008, 11:48 AM
**** while we are at itI wouldnt mind having a 45" either

Incriminator actually makes a 21, though...

chunky cumz
09-08-2008, 11:52 AM
how big is that MTX sub that weights a couple hundred pounds. i think its like $25k or something rediculous.

helotaxi
09-08-2008, 12:18 PM
Jackhammer? 22"