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12-22-2009, 05:38 PM
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#1 | | I STILL don't get it
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i have one 12" type r sub in a ported box. when i turn it up i can hear a kind of fluttering air noise coming from the port. is that normal or can it be fixed? and what should i put the lpf and subsonic filter at? around 30hz? the amp is only powering the sub. not really sure what the box is tuned to.
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12-22-2009, 06:09 PM
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#2 | | RS.net Licensed Sponsor
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What name brand of box is it? LPF would be around 80hz and the Subsonic around 30.
The noise is probably "port whistle". Too much power is being put through that port, causing that sound. Either put less power through or get a better box.
__________________ Keith McCumber
SoundsGood Auto Services
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12-22-2009, 10:10 PM
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#3 | | Ye olde moderator
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Or router the port edge if you can (or get a larger diameter port.) that sub moves alot of air so if its pushing that through a 3" port that is not rounded, you may have some port noise.
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12-22-2009, 11:22 PM
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#4 | | I STILL don't get it
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it says alpine bass engine ready on the box. the port is 4" but the edge isnt rounded. is the box too small?
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12-23-2009, 02:55 PM
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#5 | | RS Licensed Vendor
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Prefabbed boxes aren't usually the best.
Port noise is quite common. I find most ported enclosures with traditional ports tend to have more noise. Focal made some boxes specifically for their subs with rounds edged ports and it still had a little port noise.
Maybe try a custom built slot port box
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12-23-2009, 05:07 PM
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#6 | | RS.net Licensed Sponsor
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Originally Posted by Cman333  Prefabbed boxes aren't usually the best.
Port noise is quite common. I find most ported enclosures with traditional ports tend to have more noise. Focal made some boxes specifically for their subs with rounds edged ports and it still had a little port noise.
Maybe try a custom built slot port box | Exactly!
__________________ Keith McCumber
SoundsGood Auto Services
Everything we do is sound! 104-2700 Barnet Hwy Coquitlam 604-961-8626 1420 Boundary Rd. Burnaby, 604-676-8100 www.soundsgoodauto.com Hours of Operation: Tuesday through Saturday 9:00 to 6:00
Authorized dealers of: Focal, Audison, Alpine, JL, Kenwood, Pioneer, Sony, Thinkware, Compustar, K40... WE ACCEPT: ICBC Claims, VISA, MC, DEBIT, PAYPAL AND CASH. | |
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