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Discussion Title: box design queston
| noiseboy |
2005-05-22 09:12:00 |
box design queston
I made boxes for two 6x9" speakers. Should I drill ports in them or will they be fine without them? If I do, how big do they need to be?
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| bumpinstang77 |
2005-05-23 00:28:00 |
Re: box design queston
no you don't need ports in your 6x9 boxes and FYI ports are not just simply drilling holes into a box you have to calculate the length of the port to get a desired tuning frequency based on the area of the port and volume of the enclosure.
__________________
1997 Ford Mustang 3.8v-6 5-speed
150 amp alternator
optima yellow top
Panasonic cq-c8100u (not in yet)
2 SI Magunum D2 12's
4.5 cuft NET ported box tuned to 28hz w/ 70 sqin of port area
Avionixx 1200.2
Will soon buy CDt HD62's, DLS UR6, adire koda set, or sumthin along those lines and an amp to power it (prolly an avionixx 400.2)
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new sig pic soming soon!!!
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| ngsm13 |
2005-05-23 00:56:00 |
Re: Re: box design queston
Quote:
Originally Posted by bumpinstang77
no you don't need ports in your 6x9 boxes and FYI ports are not just simply drilling holes into a box you have to calculate the length of the port to get a desired tuning frequency based on the area of the port and volume of the enclosure.
X2...this kid knows what he's talking about...sometimes
NG
__________________
I design custom enclosures!
And...my sig is short!
Oh and.. YOU suck balls...
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| bumpinstang77 |
2005-05-23 13:22:00 |
Re: box design queston
sometimes my arse....... I do what works and if it works I do it. Car audio is a lot of guess work and trial and error.
__________________
1997 Ford Mustang 3.8v-6 5-speed
150 amp alternator
optima yellow top
Panasonic cq-c8100u (not in yet)
2 SI Magunum D2 12's
4.5 cuft NET ported box tuned to 28hz w/ 70 sqin of port area
Avionixx 1200.2
Will soon buy CDt HD62's, DLS UR6, adire koda set, or sumthin along those lines and an amp to power it (prolly an avionixx 400.2)
---------------------------------------------------------------------
new sig pic soming soon!!!
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| PaulD |
2005-05-23 14:44:00 |
Re: Re: box design queston
Quote:
Originally Posted by bumpinstang77
sometimes my arse....... I do what works and if it works I do it. Car audio is a lot of guess work and trial and error.
actually it's an exacting science that follows the rules of physics, every time. Unfortunately, once you get to understand that, it takes some of the "magic" out of it.
__________________
car stereo is my religion ... be prepared to be converted
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| bumpinstang77 |
2005-05-23 20:22:00 |
Re: box design queston
Yes, however a lot of the time the physics can't be calculated and its just trial and error...... i e a great subwoofer enclosure.... WinISD bass box ect.... can get you close, but only trial and error will get you closer.
__________________
1997 Ford Mustang 3.8v-6 5-speed
150 amp alternator
optima yellow top
Panasonic cq-c8100u (not in yet)
2 SI Magunum D2 12's
4.5 cuft NET ported box tuned to 28hz w/ 70 sqin of port area
Avionixx 1200.2
Will soon buy CDt HD62's, DLS UR6, adire koda set, or sumthin along those lines and an amp to power it (prolly an avionixx 400.2)
---------------------------------------------------------------------
new sig pic soming soon!!!
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| ngsm13 |
2005-05-23 20:33:00 |
Re: Re: Re: box design queston
Quote:
Originally Posted by PaulD
actually it's an exacting science that follows the rules of physics, every time. Unfortunately, once you get to understand that, it takes some of the "magic" out of it.
HAHAHAHA, i TRY to tell Mike that ALLLLLLLL the damn time...but he doesn't believe me.
NG
__________________
I design custom enclosures!
And...my sig is short!
Oh and.. YOU suck balls...
|
| PaulD |
2005-05-24 09:47:00 |
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well, the biggest problem with bass stuff is that programs like winisd cannot really factor in the fact that the interior of the vehicle is, in itself, an enclosure too - albeit a rather large one. It also can't help you find a high pressure node or "sweet spot" to put the woofer in. These still follow the laws of physics, just a little harder to quantify.
__________________
car stereo is my religion ... be prepared to be converted
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| ngsm13 |
2005-05-24 11:10:00 |
Re: box design queston
Quote:
Originally Posted by PaulD
well, the biggest problem with bass stuff is that programs like winisd cannot really factor in the fact that the interior of the vehicle is, in itself, an enclosure too - albeit a rather large one. It also can't help you find a high pressure node or "sweet spot" to put the woofer in. These still follow the laws of physics, just a little harder to quantify.
Very true. It can't account for things like Cabin Gain, completely accurate response graphs, and peaks as you were stating. Prolly b/c every vehicle is different
NG
__________________
I design custom enclosures!
And...my sig is short!
Oh and.. YOU suck balls...
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| L|_|da |
2005-05-24 14:32:00 |
Re: box design queston
this stuff is so far beyond me its not even funny
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