[PhilosophyOfSound]

Hello Guys I wanna build a subwoofer with 2 of those drivers, I bought them for $350. I want to tune the box to 16Hz with 3 port, and will copy the PB12/2+ design.

The Vas will be 700 liters, and with a parametric equalizer I can add 7 dB for the 16 Hz.

For wood I will use 36mm
MDF, moister resistant.

People told me that these speaker will newer reach the same SPL, And I agree it will not dig as deep. But at music level I think it will sound louder. It will also be able to reach 115dB+ at 20Hz.

I'll probably need some wheels to move it, I guess its gonna be heavy.

 

[chrapladm]

Do you have the WinISD file on this driver?

And what will the net volume be?

Vas do you mean volume of cabinet?

 

[PhilosophyOfSound]

Do you have the WinISD file on this driver?

And what will the net volume be?

Vas do you mean volume of cabinet?

Net volume will be between 650 L -700 L, or should it be much?

Yes the vas I mean volume, I thought it was the technical term for it.

 

[chrapladm]

Vas= equivalent amount of air that equal the stiffness of the suspension of the driver.

So according to your driver and file it is 324liters.

Are you wanting to only have a 16hz tune or do you want the option of having multi tuned ports like the SVS design?

Also are these for movies or music?

With movies I can understand the low tuning but for music, for me, it would be not good. I do like the 22hz tuning also.

700liters, 900watts, 16hz tune and your at 115.5db at 16hz and 117.5 at 30hz. With a 420liters 1700watts 22hz tuning your at 105db at 16hz and 122.7db at 30hz.

 

[PhilosophyOfSound]

Vas= equivalent amount of air that equal the stiffness of the suspension of the driver.

So according to your driver and file it is 324liters.

Are you wanting to only have a 16hz tune or do you want the option of having multi tuned ports like the SVS design?

Also are these for movies or music?

With movies I can understand the low tuning but for music, for me, it would be not good. I do like the 22hz tuning also.

700liters, 900watts, 16hz tune and your at 115.5db at 16hz and 117.5 at 30hz. With a 420liters 1700watts 22hz tuning your at 105db at 16hz and 122.7db at 30hz.

The multi-tuning is definitely a way I wanna go, its seems very interesting to be able to tune it. It is mostly aimed at movies, but music can't be ruled out, I listen to music like Trentemøller, Pink Floyd, The doors, Pendulum, and Joe Satriani etc etc.

And I want to add 9 dB in the 16Hz and with I should be able to get 122dB.

 

[theJman]

And I want to add 9 dB in the 16Hz and with I should be able to get 122dB.

You want to add 9dB of boost at 16Hz? That's an awful lot of boost at a very low level. You might want to reconsider that.

 

[chrapladm]

I wouldnt suggest adding so much boost until you know how the subwoofer measures in your room. Most rooms add in about 5db and more the lower you go from 30hz and down. BUT every room is different so it is always best to build your sub according to your design and then measure its response in room. Then after you establish what it does in room then add or cut EQ accordingly.

With the multi tuned ports and being so large if you ran the sub sealed it would only take a few hundred watts to hit Xmax. There are a few threads on here that have multi tuned ports. 22hz, 17, and 12hz I think is what they were. I myself would only use a 12hz and 22hz tuning but its up to you.

 

[PhilosophyOfSound]

I wouldnt suggest adding so much boost until you know how the subwoofer measures in your room. Most rooms add in about 5db and more the lower you go from 30hz and down. BUT every room is different so it is always best to build your sub according to your design and then measure its response in room. Then after you establish what it does in room then add or cut EQ accordingly.

With the multi tuned ports and being so large if you ran the sub sealed it would only take a few hundred watts to hit Xmax. There are a few threads on here that have multi tuned ports. 22hz, 17, and 12hz I think is what they were. I myself would only use a 12hz and 22hz tuning but its up to you.

Maybe I should go with port then.

but wen I see windisd if I don't go any bigger (700) it should be able to get to 16 within the xmax, is there something I missed?

 

[PhilosophyOfSound]

You want to add 9dB of boost at 16Hz? That's an awful lot of boost at a very low level. You might want to reconsider that.

You are correct I hould first test it out, I wonder how heavy the box will get I use 36mm MDF. And those drivers are 32KG each.

 

[theJman]

You are correct I hould first test it out, I wonder how heavy the box will get I use 36mm MDF. And those drivers are 32KG each.

They'll be back-breakers all right, but a nice solid enclosure with heavy duty drivers can't be beat for deep bass.