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1 Attachment(s)
Here is the Horn Board.
The gap between the Horn Board and the L-Pad board is roughly 21-7/8" minus 15-3/8" minus 6-5/16" = 3/16"
The grille measures 21-7/8" wide x 20-3/4" high (including cloth thickness on the edges) and there is a gap between the top of the grille and the bottom of the Horn/L-Pad boards similar to the gap between the Horn and L-Pad boards. 1/8" to 3/16". It would appear the tolerances are 1/16" as opposed to 1/32" but that might not be true.
The tuning is accomplished using two 4-1/8" ID ports each having an 8-1/4" duct.
It should be noted that this tuning has been termed as being "aggressive" for Home Hi-Fi use by several JBL engineers.
Their recommendation has been to tune down into the 28 Hz to 30 Hz range.
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:thmbsup:
Phenomenal autocad job, dude.
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Thanks!
I rushed through it but hopefully it will get the point across :)
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THANKS! almost there...
G'Day Giskard,
Thanks very much for the drawings.. just what I needed.
May I ask you to do one more bit of research before you move on from your 4430's... could you post the resistance of the inductors please?
L102 2.6mH
L2 1.6mH
L1 0.04mH
Regards Scott