| | I just cut my ports by 3" |  |
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coatesleandrew
Basic Contributor
Number of posts : 271
Age : 43
Location : Zachary,Louisiana
Registration date : 2008-04-20
|  Subject: I just cut my ports by 3"  Sun Aug 17, 2008 4:39 pm | |
| I am running two memphis M3 12's on a 1100d. In a 4.36 cu ft. box with 4 inch ports. The ports was cut at 4 x 9.5 and i was hitting 139.7 and 140. I just decided to cut the ports down to 4 x 6.5. I was wondering what kind of difference could I expect from doing this. The box was tuned at 35 hz and now it is at 40 hz. | |
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Nice
Advanced Contributor
Number of posts : 2042
Age : 63
Location : New Haven, Ct.
Registration date : 2007-07-13
| | Subject: Re: I just cut my ports by 3" Sun Aug 17, 2008 5:03 pm | |
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coatesleandrew
Basic Contributor
Number of posts : 271
Age : 43
Location : Zachary,Louisiana
Registration date : 2008-04-20
| | Subject: Re: I just cut my ports by 3" Sun Aug 17, 2008 5:23 pm | |
| well my subs are recommended to tuned at 40hz but my box was tuned at 35hz. | |
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Nice
Advanced Contributor
Number of posts : 2042
Age : 63
Location : New Haven, Ct.
Registration date : 2007-07-13
| | Subject: Re: I just cut my ports by 3" Sun Aug 17, 2008 5:25 pm | |
| Sometimes, you can't use the manufacturer specs. Do you have a meter? | |
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coatesleandrew
Basic Contributor
Number of posts : 271
Age : 43
Location : Zachary,Louisiana
Registration date : 2008-04-20
| | Subject: Re: I just cut my ports by 3" Sun Aug 17, 2008 5:26 pm | |
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Nice
Advanced Contributor
Number of posts : 2042
Age : 63
Location : New Haven, Ct.
Registration date : 2007-07-13
| | Subject: Re: I just cut my ports by 3" Sun Aug 17, 2008 5:28 pm | |
| So, you haven't tested with the shorter ports yet? | |
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coatesleandrew
Basic Contributor
Number of posts : 271
Age : 43
Location : Zachary,Louisiana
Registration date : 2008-04-20
| | Subject: Re: I just cut my ports by 3" Sun Aug 17, 2008 5:31 pm | |
| not yet i hope i will gain. But how much can i expect | |
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Nice
Advanced Contributor
Number of posts : 2042
Age : 63
Location : New Haven, Ct.
Registration date : 2007-07-13
| | Subject: Re: I just cut my ports by 3" Sun Aug 17, 2008 5:32 pm | |
| There' no real way to predict that. You may go down. You just have to test but post your results, I'm interested. | |
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sanman
I own this joint!
Number of posts : 12087
Age : 52
Location : shelbyville
Registration date : 2007-06-23
| | Subject: Re: I just cut my ports by 3" Sun Aug 17, 2008 10:02 pm | |
| your box is tuned that low because of to much airspace shrink the box and watch the freaquency rise
4 ports is also to much port in m opinion unless your running it sealed then its even iffy.
ports should be around 11-12" long bell to bell | |
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TECH114
Thats a Lot of Posts!
Number of posts : 4748
Age : 50
Location : Town of DBs
Registration date : 2007-06-24
| | Subject: Re: I just cut my ports by 3" Mon Aug 18, 2008 12:50 am | |
| Listen to the Sanman.. He will guide u in the right direction | |
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Skip01
Advanced Contributor
Number of posts : 2099
Location : Marrero, LA
Registration date : 2007-07-02
| | Subject: Re: I just cut my ports by 3" Mon Aug 18, 2008 10:52 am | |
| How many 4in ports do you have?
And like Nice said, I woulda tried shrinking the box also
I had my 2 12s in 3.5 total tuned to 35hz, right at 150 and now they are in 1.5cu a piece and do fine on daily music | |
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coatesleandrew
Basic Contributor
Number of posts : 271
Age : 43
Location : Zachary,Louisiana
Registration date : 2008-04-20
| | Subject: Re: I just cut my ports by 3" Fri Aug 22, 2008 9:55 pm | |
| I just cut my ports and my Dung Pile is so loud. Two Memphis m3's in a 4.36 cu ft box. With a 4" X 7" round port in each camber. I am going to put it on the meter tommrow. | |
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Mr. Nice
Newbie
Number of posts : 4
Registration date : 2008-08-22
| | Subject: Re: I just cut my ports by 3" Fri Aug 22, 2008 10:02 pm | |
| Good luck.
Is this build SPL or Street Beat? | |
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coatesleandrew
Basic Contributor
Number of posts : 271
Age : 43
Location : Zachary,Louisiana
Registration date : 2008-04-20
| | Subject: Re: I just cut my ports by 3" Fri Aug 22, 2008 10:17 pm | |
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Mr. Nice
Newbie
Number of posts : 4
Registration date : 2008-08-22
| | Subject: Re: I just cut my ports by 3" Fri Aug 22, 2008 10:21 pm | |
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coatesleandrew
Basic Contributor
Number of posts : 271
Age : 43
Location : Zachary,Louisiana
Registration date : 2008-04-20
| | Subject: Re: I just cut my ports by 3" Fri Aug 22, 2008 10:23 pm | |
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Mr. Nice
Newbie
Number of posts : 4
Registration date : 2008-08-22
| | Subject: Re: I just cut my ports by 3" Fri Aug 22, 2008 10:28 pm | |
| How do you get the sound in the car? | |
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coatesleandrew
Basic Contributor
Number of posts : 271
Age : 43
Location : Zachary,Louisiana
Registration date : 2008-04-20
| | Subject: Re: I just cut my ports by 3" Sat Aug 23, 2008 7:16 am | |
| i modifed the rear deck. And moved the rear speaker | |
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Skip01
Advanced Contributor
Number of posts : 2099
Location : Marrero, LA
Registration date : 2007-07-02
| | Subject: Re: I just cut my ports by 3" Sat Aug 23, 2008 2:08 pm | |
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