PDA

View Full Version : Does Box Shape Matter



vipervin
10-21-2007, 07:30 PM
so does box shape matter for a sealed enclosure?

i am running two type-r 10" in a sealed box. each box internal dimensions are:

6.7 H
10.5 W
16.1 L
(0.66 cu ft)

in the alpine manual, optimal specs for the external dimensions are:
11.5 x 11.5 x 12.75 and 0.65 cu ft gross internal vol


now it feels like my subs should be getting louder. i am wondering if my weird box design may be the issue.

bonesninja
10-21-2007, 07:36 PM
should not matter much, if any

squeak9798
10-21-2007, 07:39 PM
For subwoofers no, box shape doesn't matter.

Are your measurements external or internal ?

vipervin
10-21-2007, 07:55 PM
the ones i took of my box are internal... the alpine manual specs are external.

so i guess my next question is.. how big of a difference does vented make over sealed in terms of sound levels.. is it night and day?

bonesninja
10-21-2007, 08:00 PM
the ones i took of my box are internal... the alpine manual specs are external.

so i guess my next question is.. how big of a difference does vented make over sealed in terms of sound levels.. is it night and day?

it can be very drastic...ported boxes are more efficient and GENERALLY get louder. Sealed boxes are much more forgiving to design and space errors

UndercoverPunk
10-21-2007, 08:05 PM
Box shape can be very important, but you'd have to be doing some crazy nonsensical
**** for it to really mess things up.

Just thought I'd throw that out there for all you strange people.

KnOkIn It 420
10-21-2007, 08:05 PM
No,IIRC u DO NOT want a perfectly square box

keifersracing
10-21-2007, 08:08 PM
the box shape can do it some good . it is the way it flows the air the better the air flow the better the sound and so on

bonesninja
10-21-2007, 08:10 PM
the box shape can do it some good . it is the way it flows the air the better the air flow the better the sound and so on

air doesn't exactly flow in a sealed box.........

keifersracing
10-21-2007, 08:12 PM
opps i did not see that part my bad

IgnoreMe
10-21-2007, 08:13 PM
yes box shape matters. you must shape it like a ***** for best freq response.

alpinetypeR
10-21-2007, 08:14 PM
some one made that sphere box...
i bet that hits like 167 dbs

UndercoverPunk
10-21-2007, 08:16 PM
Alpine Type R would say that.

andytb
10-21-2007, 08:18 PM
***** shape is the best

IgnoreMe
10-21-2007, 08:20 PM
***** shape is the best

your too late...you lose

vipervin
10-21-2007, 09:12 PM
yes box shape matters. you must shape it like a ***** for best freq response.

out of MDF or fiberglass? :)

IgnoreMe
10-21-2007, 09:13 PM
out of MDF or fiberglass? :)

tapioca pudding

squeak9798
10-21-2007, 10:32 PM
No,IIRC u DO NOT want a perfectly square box

For subwoofers operating in the subbass frequency region there is nothing wrong with a perfectly square enclosure as the wavelengths are far too long compared to the size of the enclosure for it to matter.

About the only time it would be an issue would be for people doing crazy IB projects in their home where they are using attics, basements, etc as airspace........they might have issues with standing waves.

But for any enclosure that will fit into a car.....no.