Fs on a sub. Do I tune my box to the same frequency?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=141252
Printed Date: May 02, 2024 at 9:50 PM

Topic: Fs on a sub. Do I tune my box to the same frequency?

Posted By: firstr8felon
Subject: Fs on a sub. Do I tune my box to the same frequency?
Date Posted: May 05, 2016 at 7:39 PM

Just read a Web page that said something about tuning a box to the same frequency of the sub. Is this true

Replies:

Posted By: DYohn
Date Posted: May 06, 2016 at 9:43 AM

A sealed enclosure fb (box resonance) will be > fs. A ported enclosure depends on more than just fs. What sort of system are you designing?

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Posted By: firstr8felon
Date Posted: May 07, 2016 at 12:19 AM

Thank you for your assistance. I'm going to be running the Kenwood dnx890 an arc audio 4 ch. For my highs with 4 type r 6" and 2 polk audio 1 ohm stable amps linked together to push an fi audio 18" sp4 with 2 caps. That sub is 24.9htz fs and I'm building the box now and unsure what to tune the box at. Slot Ported box. I was going to tune it to around 28 or 32 htz.

Posted By: DYohn
Date Posted: May 07, 2016 at 12:40 PM

I suggest following the manufacturer's recommendations. What does the owner's manual tell you are the suggested enclosure parameters for your sub?

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Posted By: firstr8felon
Date Posted: May 12, 2016 at 4:33 AM

It say 6 - 8 cu ft. No mention of what to tune the enclosure at

Posted By: DYohn
Date Posted: May 14, 2016 at 4:02 PM

What's the subwoofer make and model?

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Posted By: firstr8felon
Date Posted: May 16, 2016 at 2:01 AM

Fi 18" sp4

Posted By: DYohn
Date Posted: May 16, 2016 at 11:54 AM

I ran the numbers for that driver. In 7 cu ft, port it at 21Hz.

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