new box build help for a newbie @ 28hz

[speng 10+ year member]

Hi all, Im new here. Great site. Just been having a mess around with the

re calculator and I have decided to build a box for 2 12's. not to sure which ones as yet but have come up with the perfect box for my space in the trunk.

Just wanted to know if you could give me some f/back on this as I like super low rumbling bass.

33 w x 15 h x 22.25 d

4in wide port, port length is 17in.

total port length is 41.5

sq port area is 54in

Total box volume is 3.856cf

Tuning is 28hz. All according to re calulator. I'm ready to build.

Would this box be a good design please for 2 x 12'2 and get super low. Im not fussed on the upper end frequencies as I listen to dub which is deep growling bass. Thank you for any advise / help if you can //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

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[speng 10+ year member]

Sorry for the bump guys, just trying to get to grips with this

 

[uGotF-ckedUp 10+ year member]

might be tuned to low.. maybe 30hz?

 

[speng 10+ year member]

I get it, so therefore I will just shorten the port to 8.5 to raise the tuning which also increases my box volume to 4.1cf and my tuning to 30hz. Cool. Just that I heard that its a good idea to tune lower because when I drop the subs in, the tuning will raise by 3hz or so. If thats true then the tuning maybe 31hz in that case and if I tune to 30hz, it may end up at 33hz, is this correct ?

 

[speng 10+ year member]

Any more help for a newbie please

 

[bonesninja 5,000+ posts]

yes...what subs are they?

 

[SSS 18734 5,000+ posts]

Tuning will only change if you don't account for various displacements, or build the box incorrectly.

 

[riddla 10+ year member]

yuikk

 

[bonesninja 5,000+ posts]

yuikk

wat?

 

[speng 10+ year member]

I was thinking of some type r's or pioneer premier woofers if thats any good

 

[FurbiesAndBeans 10+ year member]

I was thinking of some type r's or pioneer premier woofers if thats any good

Type Rs like tuning of 34 hz =P

 

[speng 10+ year member]

sounds good , what about premiers, I can buy them on quite cheap, the 2ohm versions, I want to go as low as possible

 

[speng 10+ year member]

I got the wood cut and dont know whether to use the port length of 8.5in giving me a tuning of 30hz or the 12.5 cut giving me 29hz tuning, any advise please. I will get pics up when Im done ?

 

[dman4486 5,000+ posts]

there is nothing wrong with tuning low, but you need to know what drivers you will be using before designing the enclosure.

 

[marcotheclepto 10+ year member]

there is nothing wrong with tuning low, but you need to know what drivers you will be using before designing the enclosure.

x2 need to know for sure what subs your going to be using to know what volume the box needs to be cant just build a box and drop some subs in...