Single NSB enclosure volume

[chipco3434]

School me...

I would like to mount an NSB in a sonotube. I would like recommendations on diameter, length, and porting. Design should be reasonable for desktop.

Any help appreciated.

Thanks.

[johnnail]

> School me...

> I would like to mount an NSB in a sonotube.
> I would like recommendations on diameter,
> length, and porting. Design should be
> reasonable for desktop.

> Any help appreciated.

> Thanks.

Are you intending to use this as a stand-alone speaker? You really need some sort of tweeter to fill in the top end....that said, if you are making some sort of computer speaker system, I would recommend using one of those plate amps that has subwoofer and sattelite power built in....they usually have 25 watts channel to the sattelites and 50 watts mono to a subwoofer....they work really good.
If you are going standalone, the an 8" inner diameter sonotube about 12" long would do....average amount of lining, 3/4" mdf caps, port tube 2" diameter about 3" long.....this nets a .35 cu.ft. enclosure with a tuning of 70hz...finished F3 with room gain should be in the mid 50's. But you may find that you don't like this setup.....that driver doesn't have very much excursion capabilities....so about 2 watts is about all she'll take in the region of 60hz down before she reaches excursion limits...i.e. distortion. My recommendation is the sub/sat power amp, a decent 6.5" or 8" subwoofer in a smaller box...and go sealed with the NSB's. About a .15 cu.ft. sealed container....or 6" diameter sonotube about 9.5" long....with 100% fill....and add a 280mfd highpass cap in series...to eliminate the bass...though I think that the sub/sat plate amp does this for you....though not sure about that. This is good for about a 105hz F3...perfect for mixing with a sub. The sound from the NSB should be cleaner this way, too.
A good mate to the NSB for the smaller tube is to use a HIVI TN-28 top-mount tweeter. It is fairly cheap and has a good airy sound. Nice value.

John

[marlboro]

Email me at <A HREF="mailto:calipso@epix.net">calipso@epix.net</A>.

[philip]

http://i18.photobucket.com/albums/b105/phillyguy19020/Mystique/Mystique07-2.jpg


I made these open baffle, tweeter is discontinued xo in enclosure. I use them for surrounds. They sounded good as mains (receiver set to small of course).

Front view
<A HREF="http://i18.photobucket.com/albums/b105/phillyguy19020/Mystique/Mystique01-3.jpg">http://i18.photobucket.com/albums/b105/phillyguy19020/Mystique/Mystique01-3.jpg</A>

Finished view
<A HREF="http://i18.photobucket.com/albums/b105/phillyguy19020/Mystique/Mystique02-3.jpg">http://i18.photobucket.com/albums/b105/phillyguy19020/Mystique/Mystique02-3.jpg</A>

Mounted view
<A HREF="http://i18.photobucket.com/albums/b105/phillyguy19020/Mystique/Mystique07-2.jpg">http://i18.photobucket.com/albums/b105/phillyguy19020/Mystique/Mystique07-2.jpg</A>

[jonathan]

[philip]

My xo is not applicable unless you have the discontinued AR tweeter.

[chipco3434]

This is for a scout project. We have built the amps already (LM4752) and I have some NSB's to throw into the mix. The sonotube thing is easy I think we will see about 3 watts with a 14 volt supply.

I'll try it with the ported enclosure and see how that flies. Maybe some piezo tweets on top. I'll take suggestions.

[chipco3434]

> Are you intending to use this as a
> stand-alone speaker? You really need some
> sort of tweeter to fill in the top
> end....that said, if you are making some
> sort of computer speaker system, I would
> recommend using one of those plate amps that
> has subwoofer and sattelite power built
> in....they usually have 25 watts channel to
> the sattelites and 50 watts mono to a
> subwoofer....they work really good.
> If you are going standalone, the an 8"
> inner diameter sonotube about 12" long
> would do....average amount of lining,
> 3/4" mdf caps, port tube 2"
> diameter about 3" long.....this nets a
> .35 cu.ft. enclosure with a tuning of
> 70hz...finished F3 with room gain should be
> in the mid 50's. But you may find that you
> don't like this setup.....that driver
> doesn't have very much excursion
> capabilities....so about 2 watts is about
> all she'll take in the region of 60hz down
> before she reaches excursion limits...i.e.
> distortion. My recommendation is the sub/sat
> power amp, a decent 6.5" or 8"
> subwoofer in a smaller box...and go sealed
> with the NSB's. About a .15 cu.ft. sealed
> container....or 6" diameter sonotube
> about 9.5" long....with 100%
> fill....and add a 280mfd highpass cap in
> series...to eliminate the bass...though I
> think that the sub/sat plate amp does this
> for you....though not sure about that. This
> is good for about a 105hz F3...perfect for
> mixing with a sub. The sound from the NSB
> should be cleaner this way, too.
> A good mate to the NSB for the smaller tube
> is to use a HIVI TN-28 top-mount tweeter. It
> is fairly cheap and has a good airy sound.
> Nice value.

> John

Thanks, this is perfect information!!!!