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Old 18th June 2013, 03:45 AM   #1
Thims is offline Thims  Australia
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Default re TB Subwoofer design, phase concerns

Hello,
I have a room with a raised floor in which I wish to use 3 sub woofer enclosures using the TB W5-11338. I have only a height of 155mm to play with.
Each sub would have 4 x TB W5-1138 in a ported design.
Because of width restrictions on the front area, I cannot place all of the drivers in a straight line but can place them in a u shape with a port at the rear.
My concern is keeping all of the drivers in phase and with the port at the rear.
Each enclosure is approximately 48L with a tune of 37hz.

I normally use Leap but since upgrading to Windows 7, it doesn't work on it and I have not been able to test the design before I build it.
Can anyone see issues that I cannot see or if this design will work properly?

Or a better solution using different drivers? I could fit 3 LAT500 in there but I don't think they would have the same output as 12 TB's.

Thanks
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Old 20th June 2013, 05:21 PM   #2
kessito is offline kessito  Netherlands
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try vmware player. it's free and woks great if you need to run old applications

cheers,
kees
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Old 20th June 2013, 08:19 PM   #3
tb46 is offline tb46  United States
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Hi Thims,

As long as you stay below ~100Hz you should be fine with that arrangement. It looks to me that your needs would be perfect for djk's PPSL:
A Thread for those interested in PPSL enclosures
I'll attach an example, the standard PPSL is on the left, the opening can be reduced to 1/2 Sd (or even a little less).

Regards,
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File Type: pdf PPSL_Quad.pdf (10.7 KB, 14 views)
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Old 20th June 2013, 09:22 PM   #4
tb46 is offline tb46  United States
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Hi again,

Have you noticed that this driver is not a 5-1/4" driver, but more like a 6-1/8" (frame O.D.) driver? Manufacturer's spec is 155.8+-0.5 mm.
What is the space you have available, e.g.: the front area, and the area looking down on the sub?
What are your output requirements/application?

Regards,
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Old 23rd June 2013, 10:58 PM   #5
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Can't say as I understand the question here, but why do you want to have similar/uniform subs when heterogeneity works a lot better in real rooms (even if wannabee-engineers recoil at the thought)?

Ben
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