Alpine SWR-12D4 enclosure help

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Hello !

I have just bought single Alpine SWR-12D4 sub with Alpine PDX-M6 amp...

And here is the problem - I've already tried different types of calculators, such as Torres old and new version, WinISD, BassBox 6 Pro, RE Audio calculator, to design proper enclosure. But every time I get different results...

And there is another problem. Recommended enclosure size Alpine has given for this sub in Product catalogue 2013 - 2014 and sub's user manual are different. So I am a bit confused which data must be used to make proper enclosure. For example - in users manual recommended volume range is 1,0 - 1,5 ft³ but in product catalogue recommended vented box volume is 53,8 liters ~ 1,9 ft³...

So I thought maybe you could help me with this enclosure. I would be very thankful if someone could design L-type vented enclosure for my sub... It is a lot easier for you to do that because you have already designed many enclosures...

Available max dimensions - H = 17; W = 25; D = 17.

Tuning 32 - 34 Hz

It will be used in VW Golf MK4

Thank you.

P.S. - I am sorry for grammatical mistakes. English is not my native language so I hope you understood everything I wanted to tell you...

[Joe X]

That catalog if I am not mistaken lists the SWR-1243 ( 4th generation ) instead of the SWR-12D4 ( 5th generation ) that you have, therefore it's 1.5 cubic feet net.

[Joe X]

Anyways, in the following situation Torres is accurate:

Dismiss bracing.

Port parts as follows:

Top to Bottom: 10 3/4" x 12 1/2"
Extension: 18" x 12 1/2"

[kr0nic]

iv got the same sub with basically the same box you need a bigger port , iv got 2 inch by 11.5 and its to small , i get a bit of port noise not bad but a little

my box is tuned 2 , 29hz and is 28 inches/16/13 with a 2 inch port

if i was to do it again id do a 3 inch port, mines a single baffle it seems to hold together fine ,im

running 800-1000w rms ,nice and loud, better lows than a sealed box not bad for a single 12

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Anyways, in the following situation Torres is accurate:

Dismiss bracing.

Port parts as follows:

Top to Bottom: 10 3/4" x 12 1/2"

Extension: 18" x 12 1/2"

Thanks for design...

I thought I could make an experiment and I dropped your dimensions in torres on my computer...

Here is what I got -

Old version:

New version:

Do you think that extra baffle is necessary???

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One more question...

If I am using Joe X offered box design, in which position I should put subsonic filter - OFF; 15 Hz or 30 Hz ???

Thanks

[Joe X]

The double baffle is not strictly necessary but recommended, I would do the bracing at least. Subsonic filter to 28Hz, you are only running 600W on a 1K sub, there should be no issues, check your electrical and set your gains properly just in case.

Really weird what the calculator is doing in your computer, in any case I know the above is correct as I have double checked it by other means.

Edit: try a .net framework reinstall.

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Thanks for info...

this weekend I will try to build this enclosure.

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So here is the final result...

Thanks everyone for help...