Subtracting driver displacement for proper box construction.
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Team Owner
Joined: Feb 2000
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From: Sacramento CA
Subtracting driver displacement for proper box construction.
I emailed Focal Customer Service (Which is top notch, by the way) and got these specs for the 165w:
" The ideal enclosure would be a .35 cubic foot vented enclosure. The port
would be 2 inch diameter, 3 inches long. "
Seems like a pretty big enclosure.. do you think i should worry about driver displacement, or just build it to those exact specs?
hmn.. on second thought, I'm not sure I could get something like that on my door.. how tempermental do you suppose they are to sealed enclosures? I could fit maybe a .12 cubic foot enclosure that's sealed.
[Modified by Smash, 4:32 PM 2/27/2002]
" The ideal enclosure would be a .35 cubic foot vented enclosure. The port
would be 2 inch diameter, 3 inches long. "
Seems like a pretty big enclosure.. do you think i should worry about driver displacement, or just build it to those exact specs?
hmn.. on second thought, I'm not sure I could get something like that on my door.. how tempermental do you suppose they are to sealed enclosures? I could fit maybe a .12 cubic foot enclosure that's sealed.
[Modified by Smash, 4:32 PM 2/27/2002]
Safety Car
Joined: Aug 2000
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From: St. Joseph MO
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Re: Subtracting driver displacement for proper box construction. (Smash)
I emailed Focal Customer Service (Which is top notch, by the way) and got these specs for the 165w:
" The ideal enclosure would be a .35 cubic foot vented enclosure. The port
would be 2 inch diameter, 3 inches long. "
Seems like a pretty big enclosure.. do you think i should worry about driver displacement, or just build it to those exact specs?
hmn.. on second thought, I'm not sure I could get something like that on my door.. how tempermental do you suppose they are to sealed enclosures? I could fit maybe a .12 cubic foot enclosure that's sealed.
[Modified by Smash, 4:32 PM 2/27/2002]
" The ideal enclosure would be a .35 cubic foot vented enclosure. The port
would be 2 inch diameter, 3 inches long. "
Seems like a pretty big enclosure.. do you think i should worry about driver displacement, or just build it to those exact specs?
hmn.. on second thought, I'm not sure I could get something like that on my door.. how tempermental do you suppose they are to sealed enclosures? I could fit maybe a .12 cubic foot enclosure that's sealed.
[Modified by Smash, 4:32 PM 2/27/2002]
Thread Starter
Team Owner
Joined: Feb 2000
Posts: 51,504
Likes: 6
From: Sacramento CA
Re: Subtracting driver displacement for proper box construction. (JoeyG)
oh well, looks like the Focal rep thinks the space i can work with is worse than leaving it free air... i guess i'll use the ported spec with an L shaped enclosure.
Pro
Joined: Oct 2000
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From: Battle Ground, WA
Re: Subtracting driver displacement for proper box construction. (Smash)
How about just using the Thiele-Small parameters to find other "optimal" or just less than, dimensions that you could use?! I've done MANY MANY boxes where I could get better response out of a "less than optimal" box. :rolleyes:
Edit: And to answer the "use driver displacement" question, for a ported/vented box, EXACT measurement is critical. Otherwise why vent? The tuning frequency would be off if the dimensions weren't correct.
[Modified by Anguish, 5:42 PM 2/27/2002]
Edit: And to answer the "use driver displacement" question, for a ported/vented box, EXACT measurement is critical. Otherwise why vent? The tuning frequency would be off if the dimensions weren't correct.
[Modified by Anguish, 5:42 PM 2/27/2002]
