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15" sealed subs - simulated F3 values too high ??
15" sealed subs - simulated F3 values too high ??
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Old 16th July 2019, 01:49 AM   #11
audfrknaveen is offline audfrknaveen  India
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Since this is for home usage I can't accommodate huge boxes. 18"x20"x24" is maximum size I can use. With this box, my driver gives 40hz @ F6. Will that be ok for music?
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Old 16th July 2019, 02:35 AM   #12
cowanaudio is offline cowanaudio  Australia
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15" sealed subs - simulated F3 values too high ??
For most music and basically all rock/pop, yes. The room will lift the bottom end a little to make the speaker close to flat down to the lowest strings on a bass guitar. Kick drums are usually tuned higher. If you feel like you need a little more a touch of eq will help out.
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Old 16th July 2019, 02:55 AM   #13
djn is offline djn  United States
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Here is my build and these are super tight, clear, and powerful.

New build
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Old 16th July 2019, 07:25 AM   #14
audfrknaveen is offline audfrknaveen  India
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Quote:
Originally Posted by djn View Post
Here is my build and these are super tight, clear, and powerful.

New build
nice build with metal rods as bracing
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Old 16th July 2019, 07:26 AM   #15
audfrknaveen is offline audfrknaveen  India
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thanks a lot for all your suggestions guys !!!
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Old 16th July 2019, 06:11 PM   #16
djn is offline djn  United States
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I like the threaded rod as it takes up much less space in the cabs.
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Old 17th July 2019, 10:45 AM   #17
Think is online now Think  Netherlands
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15" sealed subs - simulated F3 values too high ??
If you put the subwoofer in a corner of a room it will have the most room gain; the roll off on the low end will be a lot less then the modeling software predicts.

Last edited by Think; 17th July 2019 at 10:50 AM.
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Old 17th July 2019, 02:16 PM   #18
audfrknaveen is offline audfrknaveen  India
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I will try corner placement. And I'm building dual subs. So let's see how it sounds ....
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Old 17th July 2019, 05:42 PM   #19
Juhazi is offline Juhazi  Finland
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Frequencies below 40Hz from a sealed woofer get assistance from boundaries (boundary gain) and room modes, alas pressurization below the lowet mode. These make the room response much "better" than simulated free-air looks. A ported woofer is much worse in this respect.

How will the subwoofer be amplified? Many plate amps have low bass boost option, often adjustable like Hypex and DaytonAudio. A large 15" driver can take this eq guite easily and it doesn't have to use hundreds of watts, at home. I have 2x15" sealed woofers in my HT room and below are some measurements without eq and xo.
Attached Images
File Type: jpg ppsl room press.jpg (69.7 KB, 81 views)
File Type: png ppsl470 near vs room 500ms 112.png (94.2 KB, 85 views)
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Last edited by Juhazi; 17th July 2019 at 05:52 PM.
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Old 17th July 2019, 06:21 PM   #20
djn is offline djn  United States
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For the cost of two plate amps you can buy a behringer inuke 3000DSP. That's what I use.
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