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Old 20th October 2010, 03:18 AM   #1
jonney is offline jonney  Canada
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Default alpair 12 box

hello!

first...sorry for my english because I am french Canadian.
I want to make a box for my alpair 12

but I like électronic music like trentmoller, so i want to make a small box for have a fast and tight response.

its a bass reflex box of .636 cubic feet, what you thinks about that?
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Old 20th October 2010, 03:48 AM   #2
jonney is offline jonney  Canada
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Default angle box

ho...I forget that one.

the owner of totem acoustic suggest me to make a box like that, always for my alpair 12...what you thinks about that?

again .636 cubic feet and bass reflex

thanks
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Old 23rd October 2010, 01:51 AM   #3
jonney is offline jonney  Canada
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Unhappy anybody want to help me

what you thinks about that box?
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Old 23rd October 2010, 03:09 AM   #4
GM is online now GM  United States
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Well, it makes a nice, high tuned 0.5 Qtc sealed alignment, but you say it's a BR, so need the vent dimensions. That said, based on published specs this is too much volume (Vb) for a simple BR unless driven with a high output impedance, so are you?

GM
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Old 23rd October 2010, 03:31 AM   #5
jonney is offline jonney  Canada
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the vent is 2 inch diameter and 4 inch long... its write on the first draw

you thinks its to much volume...can you explain to me why?
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Old 23rd October 2010, 04:34 AM   #6
GM is online now GM  United States
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With this vent, it is what is known as an extended bass shelf (EBS) alignment which works well with either a high output impedance or in a low tuned (sub) woofer alignment, but not so much otherwise IME. I mean you can add damping to roll it off, but as is, it won't provide what I consider a 'fast'/'tight' response.

I'm not you though, so of course only one way to know for sure if it will meet your performance goals.

GM
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Old 23rd October 2010, 05:39 AM   #7
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It should work OK. (as per GM, for my boxes volume maxes out at about 13 litres) I'd add some bracing

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