First 4th Order

[MOTA.TIMTIM]

First off, I'm not a pro, just a pro compared to my peers lol. I have build boxes for 8s to 18s. But I wanna go at my first 4th order. I wanna take a P2D4 I have from a old setup and throw a 250/1 JL on it. My issue is my box seems to be to small. It's basically 15x15x15 but the air space is adding up real close to specs. Could this be right?

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[Jeffdachef 5,000+ posts]

First off, I'm not a pro, just a pro compared to my peers lol. I have build boxes for 8s to 18s. But I wanna go at my first 4th order. I wanna take a P2D4 I have from a old setup and throw a 250/1 JL on it. My issue is my box seems to be to small. It's basically 15x15x15 but the air space is adding up real close to specs. Could this be right?
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You have 1.42 before any displacements... Thats tiny even enough for a normal ported especially on your power. It might work if its an 8 or 6.5.

 

[MOTA.TIMTIM]

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[MOTA.TIMTIM]

You have 1.42 before any displacements... Thats tiny even enough for a normal ported especially on your power. It might work if its an 8 or 6.5.

it is a 8in, it's recommend sealed space is .23 . I'm just trying to see how loud a cheap 8in will actually get

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[hispls 5,000+ posts]

The main issue with bandpass is that all your "gains" will come at the expense of bandwidth. By the time you have a good wide bandwidth you may as well have just used a sealed box. If you want a giant peak at one note you may be able to make that happen but it'll require some testing most likely.

Really it's not like a box that size costs more than 40$ worth of materials so buy a sheet of wood and get cracking and report back.

 

[Jeffdachef 5,000+ posts]

it is a 8in, it's recommend sealed space is .23 . I'm just trying to see how loud a cheap 8in will actually get
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You didnt specify on the original post, yeah it should work

 

[MOTA.TIMTIM]

I'll most likely start the build next week, just wanted to double check to see of it was even correct

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