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Need some port help before I begin the box build


loudernu

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Posted

Rebuilding the box in my Avalanche. Max outer dimensions are 48" wide, 21" height, and 23" depth. I got three sheets of 4 x 8 birch waiting on me to start cutting.

Looking for triple baffle, putting in my 2 15" MT's and going to be running my SD16kd at 4 ohms on daily, and down to 1 ohm for competitions. Want it tuned low, though, as this is a 90% daily driver.

I have been playing with Torres box calculator, but trying to get the port area up, and keep low tuning is killing me.

Can anyone plug some numbers in, and HOPEFULLY, add a sketchup of it. I suck at sketchup, but like to be able to see what I am building, before I start cutting wood.

Posted

How low of a tune do you want it...and do you have the model number of those subs so I look up the displacement and cut out....

New build coming soon. [center][url="http://imageshack.us/photo/my-images/3/sigtoo.jpg/"][img]http://img3.imageshack.us/img3/9541/sigtoo.jpg[/img][/url][/center]

Posted

so what do the MTs require air space wise. slot or aero ports drivers side top bottom pass side or center slot port.

MT displacement

you left out osome minor details

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Posted

sorry about that. The MT's are just temporary, until I get some Level 5's. But subs will be firing into the cabin, with a slot port in between them. Looking for tuning in the 30-32 Hz range, like I said, this is mostly daily, with a few shows throughout the year. and total displacement for the MT's is .42

Posted

Umm..if that's the case, then why not wait for your level 5s.....because if I'm going to be taking 2 hours out of my day to make ya a box that's only going to be used for a small period of time...that's a waste of my day..=X

PS...// .42 for both subs?

New build coming soon. [center][url="http://imageshack.us/photo/my-images/3/sigtoo.jpg/"][img]http://img3.imageshack.us/img3/9541/sigtoo.jpg[/img][/url][/center]

Posted

.42 is for both subs, yes. And this box will be for the Level 5's, but I am going to run these old MT's in there until then. I know the Level 5's will be good in this small of a box with that kind of power, I am just having a hard time finding the right combo of port area and tuning for this enclosure.

Posted

I know port might seem too narrow but it is within the 9:1 ratio that is recommended, that is half of the box since the port is in the middle of the box.

Half215sBlowThrough.jpg

"The strongest reason for people to retain the right to keep and bear arms is, as a last resort, to protect themselves against tyranny in government." -- (Thomas Jefferson)

Posted

Isn't the port ratio recommendation suppose to be 6:1?

New build coming soon. [center][url="http://imageshack.us/photo/my-images/3/sigtoo.jpg/"][img]http://img3.imageshack.us/img3/9541/sigtoo.jpg[/img][/url][/center]

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