Behringer nu3000 DSP need help setup - Page 9 - Home Theater Forum and Systems - HomeTheaterShack.com

Old 03-28-13, 08:31 AM
Senior Shackster
stephen

Join Date: Feb 2008
Location: England
Posts: 112
Re: Behringer nu3000 DSP need help setup

do you know what your height to width ratio is with the sizes state 2" x 20"
mojogoes is offline

Old 03-28-13, 09:10 AM Thread Starter
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Gerald

Join Date: Mar 2010
Location: 3rd Stone from the Sun
Posts: 208
Re: Behringer nu3000 DSP need help setup

Quote:
mojogoes wrote: View Post
do you know what your height to width ratio is with the sizes state 2" x 20"
Hmmm curious, When I run the calculator for the vent length it tells me to use a 1:8 height to width ratio???

I am unsure how to do this but here is the info needed for it:

1. Enclosure Volume = 10.065
2. tuning frequency = 16hz
3. Square vent = 2"x 20"

If I make the vent width 16" I get a 20.8" vent length.. Perhaps my vent width is too wode??
The_Nephilim is offline
Old 03-28-13, 09:28 AM
Shackster

Join Date: Oct 2011
Posts: 89
Drivers will tend to make a lot of mechanical suspension noise when pushed hard. Significant output at low frequencies requires pushing it hard. Usually this quiet enough that the audible output covers it up but few of us can hear a 16hz tone. Therefore we easily hear the mechanical noise the driver is making.
Zach
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Old 03-29-13, 05:11 AM
Senior Shackster
stephen

Join Date: Feb 2008
Location: England
Posts: 112
Re: Behringer nu3000 DSP need help setup

Quote:
The_Nephilim wrote: View Post
Hmmm curious, When I run the calculator for the vent length it tells me to use a 1:8 height to width ratio???

I am unsure how to do this but here is the info needed for it:

1. Enclosure Volume = 10.065
2. tuning frequency = 16hz
3. Square vent = 2"x 20"

If I make the vent width 16" I get a 20.8" vent length.. Perhaps my vent width is too wode??
This is what i got too "1.8 height to width ratio" though i put the tuning at 16hz.....

gottavtr..........this is true that it maybe quieter when hitting the lows but if its a well enough built enclosure and spec'd speaker it would still be outputting good spl at 15hz / 10hz and very annoying if one can hear port noise at these frequencies and more so at higher ones............plus it not hitting these notes for any amount of time span.

The_Nephilim Is your enclosure design / size a well known tried and tested one with that driver /size driver?

Last edited by mojogoes; 03-29-13 at 05:21 AM.
mojogoes is offline
Old 03-29-13, 06:58 AM Thread Starter
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Gerald

Join Date: Mar 2010
Location: 3rd Stone from the Sun
Posts: 208
Re: Behringer nu3000 DSP need help setup

well the box was made up especially for this driver.. I am not sure who made it and if it has been tested but it was on the Mach 5 website..
The_Nephilim is offline
Old 03-29-13, 07:43 AM
Shackster

Join Date: Oct 2011
Posts: 89
No doubt you are putting out mass amounts of SPL but at that frequency humans for the most part not able to hear any of it. What they can hear are the 1st an 2nd fundamentals and any mechanical noise the speaker is making.

Zach
gottavtr is offline
Old 03-29-13, 08:33 AM
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stephen

Join Date: Feb 2008
Location: England
Posts: 112
Re: Behringer nu3000 DSP need help setup

Quote:
The_Nephilim wrote: View Post
well the box was made up especially for this driver.. I am not sure who made it and if it has been tested but it was on the Mach 5 website..

Well i would fibre fill it and see if that helps some.............it should slow the air flow down some?
mojogoes is offline
Old 03-29-13, 08:38 AM Thread Starter
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Gerald

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Location: 3rd Stone from the Sun
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Re: Behringer nu3000 DSP need help setup

Quote:
mojogoes wrote: View Post
Well i would fibre fill it and see if that helps some.............it should slow the air flow down some?

In the box or in the port??
The_Nephilim is offline
Old 03-29-13, 11:04 AM
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stephen

Join Date: Feb 2008
Location: England
Posts: 112
Re: Behringer nu3000 DSP need help setup

in the enclosure you dont want to block the port , filling the enclosure around 50% should slow down the air flow enough.......do this and see how it sound then report back.......do not use foam
mojogoes is offline
Old 03-30-13, 12:10 AM Thread Starter
Senior Shackster
Gerald

Join Date: Mar 2010
Location: 3rd Stone from the Sun
Posts: 208
Re: Behringer nu3000 DSP need help setup

Well I have some polyfill is that ok to use??
The_Nephilim is offline

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