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Enclosures : 1 big chamber vs individual separate chambers ?

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Enclosures : 1 big chamber vs individual separate chambers ?

Postby - Rovin's car audio - » August 14th, 2011, 11:36 am

lets say u have 2 or more subs u want to install but u cant decide whether to have each sub operating in its own chamber with each having its own port OR make 1 big enclosure that has all d subs operating in 1 airspace & 1 big port for all d subs

its a question that is often asked so lets discuss d pros\cons of each .... :)

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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby nigel1977 » August 14th, 2011, 12:19 pm

rovin, do a search, i asked this awhile ago. Lots of people basically told me i didnt know what i was doing...

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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby 3stagevtec » August 14th, 2011, 12:25 pm


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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby silent_riot » August 14th, 2011, 1:17 pm

As building and designing enclosures were once your vocation, what is your take on it rovin?

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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby - Rovin's car audio - » August 14th, 2011, 2:12 pm

yes i know it was discussed b4 but i thought as all of us has gotten a few more yrs experience in d car audio hobby we wud have a better say on it now

each has its advantages but fairly often i hear ppl swearing over 1 method than d other

will talk about it later on as im getting ready to get dressed to go carshow now .....

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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby riadb » August 15th, 2011, 9:35 pm

i honestly think there isn't any big difference..

If one amp/strapped amps are being used to power all the subs then go with the mono chamber and mono port.

If seperate/unstrapped amps are being used to power the subs then put them each in a seperate enclosure.

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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby xeon » August 16th, 2011, 8:49 am

What about Ports WRT to this topic, Lets say you using 2 subs in 1 enclosure do you use 2 ports? or multiply the port area x 2 and make it 1 port? As stated above if 1 sub alone is playing it affects the tuning not only with the air space behind it but also the type of port being used.

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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby Brian Steele » August 16th, 2011, 1:49 pm

A few things:

1. If you take an enclosure with one driver and start adding identical drivers to it, you can model the results by simply multiplying Vas by the number of drivers being used. Whether or not the end result sounds "better" or "worse" really depends on your listening preferences.

2. The last two times I built a subwoofer enclosure that used a shared chamber for two drivers, I was disappointed with the results (compared to the results I achieved with separate chambers per driver). T/S param theory says that once Vb and Fb remain the same, the end result should be the same. What T/S param theory does NOT tell you however is that the smaller the chambers (which is what will happen if you use separate chambers), the higher in frequency panel flex and internal resonances occur, and therefore the less likely that they will screw up the upper response of your subwoofer. Getting a good transition between low bass and midbass is difficult enough in a car - why take a chance and mess it up even further? My advice is therefore to go with separate chambers wherever possible.

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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby doublestenns » August 17th, 2011, 1:56 pm

:( :( :( now i sad, hav 2 subs in 1 big ass chamber :!:

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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby - Rovin's car audio - » August 17th, 2011, 3:57 pm

yes i know some of d points im posting has been made b4 :

from speaking to a few installers & DIY folks who have more experience with this than me they like d separate chambers because they prefer each sub operating in its own specific cuft\volume so in case if 1 sub stops working it will not directly affect d operating volume for d other subs , for ex say 4 12s in a 10cuft box in theory its like 2.5cuft for each sub but if 1 stops working then each of d others will "be seeing" 3.33cuft each which can possibly bottom out or over exert d remaining 3 subs before u detect 1 or 2 subs are not working

1 of d main reasons why a huge chamber box is chosen is so more subs can be stuffed in limited amt of space , that way less cuft space is occupied instead of using more wood to make separate sections & u dont need to make multiple ports too

i see above & even b4 this thread that ppl recommend if ur using sperate amps that its recommended to do separate enclosures : what about if ur building a monster system & u cannot get a single amp to power all of ur subs with sufficient power but u have a large single chamber box ? .... its only fairly recently 10k,20k,30k amps have come out so b4 that ppl had no choice but to use multiple amps & even to now ppl still do it too

in a nut shell : i think d whole issue comes down to d available amt of workable space ur vehicle has or how much of it ur will to take up ..... :|

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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby shotcaller » August 17th, 2011, 10:25 pm

sorry to highjack thread but what about an enclosure for a single driver. 2 ports vs 1 port. I've seen enclosures for single subs wt 1 port and some with 2 ports. Can anyone identify the pros and cons

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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby evolution7tt » August 18th, 2011, 4:21 pm

(...Rovin...) wrote:in a nut shell : i think d whole issue comes down to d available amt of workable space ur vehicle has or how much of it ur will to take up ..... :|


Cool. So let's say I want to do two subwoofers that are recommended to work in 1 cu ft each sealed. So 2 cu ft total. Which would be better Rovin??

- a single chamber 2 cu ft sealed box

or

- a dual chamber sealed box (1 cu ft per chamber)


Space is not an issue. The trunk can fit it. I always asked this question and got several responses. I would like to hear it from an experienced box builder. Thanks.

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Re: Enclosures : 1 big chamber vs individual separate chambe

Postby - Rovin's car audio - » August 18th, 2011, 7:29 pm

when i use to box build i got very few requests for sealed boxes maybe 1 or 2 for d whole yr ,
havent tried sealed separately vs together so i dont have experience on that

for my personal use i ran mine separate , not 2 boxes though but 1 box containing 2 subs with a board between d internal space

if u got d space then all it costs is 1 piece of wood to separate them & ur enclosure with be stiffer too ...

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