le15a port length

[razor]

:confused:can anyone help me with the right port length for jbl le15a in an 8 cubic feet enclosure using 2, inside diameter 4inch round ports tuned to 32hz many thanks razor

[Robh3606]

Hello Razor

Download WinIsd and never have to ask the question again. It's very easy to use and has your driver preloaded. All you have to do is load in the box size and tuning frequency

http://www.linearteam.dk/default.aspx?pageid=winisd

Rob:)

[Val]

I agree. There are two versions WinISD and WinISD Pro. The Pro version is the one you want, however, it does not have the LE15A parameters in it's database...but they can be added. WinISD does have the parameters for the LE15A. So, you may want to download them both and move the parameters from WinISD to the Pro version.

Also, before you build, make sure you check that your max cone excursion does not exceed the Vmax of the LE15A. This can be done with the Pro version

I used WinISD and this forum when building these:
http://audioheritage.org/vbulletin/showthread.php?7140-LE15A-375-075-Box-Design

5.2"

[Loren42]

:confused:can anyone help me with the right port length for jbl le15a in an 8 cubic feet enclosure using 2, inside diameter 4inch round ports tuned to 32hz many thanks razor

I don't have that driver in LEAP5, so I had to go and just input the T/S parameters, for what they are worth.

LEAP5 gave me 4.12" for the port length of two 4" ID ports in a cabinet with a net volume of 8 cubic feet.

If you are interested, here is the on-axis SPL and polar responses in a 8 cubic foot box. Note, this plot is for 2∏ or half-space measurements.

Since these are not measured responses and the T/S parameters are pulled from thielesmall.com database, I can't make any great accuracy claims, so use at your own risk. :)

http://www.mdbq.net/audio/JBLLE15aSPL.jpg

http://www.mdbq.net/audio/JBLLE15aPOL.jpg

[razor]

:confused:can anyone help me with the right port length for jbl le15a in an 8 cubic feet enclosure using 2, inside diameter 4inch round ports tuned to 32hz many thanks razor
many thanks to all, for information regarding le15a port length razor:)