Fostex FE167E Help with open baffle needed - diyAudio
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Old 8th December 2009, 06:24 AM   #1
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Default Fostex FE167E Help with open baffle needed

Hello,
I recently purchased a pair of these drivers for a song and am considering going "out of the box" with a design. I have a pair of plate amps and the 8" sub drivers (x4, 2 for each amp) for them made by Polk. The came from a pair of damaged RT2000 (I believe) speakers. I am not sure where the crossover point is at the moment for the sub amp/drivers but I was considering trying to use them in a box affixed to an open baffle the 167E's would be mounted to. Kind of like this here:http://pic8.audiogon.com/i/c/f/1251857340.jpg

I am wondering if somebody could tell me what would be required to place these 167E's on an open baffle and if there would be any special crossover needed on the Fostex to do this. Also, help with the dimensions of the OB would be appreciated too (I am not too familiar with this type of design)

Thanks for your help,
Jeff
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Old 8th December 2009, 06:26 AM   #2
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Click the image to open in full size.

Here is the picture of the above link I referenced above. I would make the x2 8" drivers side firing rather than the above photo. The pic is just a general Idea of what I am trying to do.
Thanks,
Jeff
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Old 8th December 2009, 09:23 AM   #3
Piek is offline Piek  Europe
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Hi,

try Edge to simulate your baffle design, here is my quick'n dirty attempt with this driver, there are a few hints over there.

If you'd ask me, when "good sound" is the goal, I would cross at 200-300Hz, which is probably too high for side-basses, so move them to the front.

-Micha

Last edited by Piek; 8th December 2009 at 09:24 AM. Reason: grammar..
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Old 8th December 2009, 01:30 PM   #4
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Jeff,

Another excellent resource for OB info is Martin King's Quarter Wavelength Loudspeaker Design site. And if you get serious about this, his MathCAD worksheets are an incredible design tool.

Cheers, Jim
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Old 8th December 2009, 03:20 PM   #5
MJK is offline MJK  United States
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For example the following simulation was run using the FE-167E driver, two Alpha 15A woofers, and a passive crossover.

http://www.quarter-wave.com/Back_Doo...ve_8_23_09.pdf

Last edited by MJK; 8th December 2009 at 03:42 PM.
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