Pi-alignment for JBL 2240 18" driver

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Posted by spkrman57 [ 75.179.190.78 ] on March 23, 2008 at 20:11:48:

Hi Wayne!

Been too long since I talked to you last!

Could you run a quick cabinet size and tuning for me please???

I'm looking at running a pair of JBL 2240H's up to 800hz for use as 2-way(larger 1.5" or 2" compression driver on Edgarhorn).

I expect the bottom end to drop off around 60hz if my Winisd calculations are close.

I'm thinking using 3 cubic ft bot tuned to 60hz.

What's your thoughts on this, and would a single coil (on the 2240H) work at 800hz like the 2205 does? If it does, what value do you recommend(maybe 1.5 mH)???

T/S of JBL 2240H (8 ohm)

Qts - .23
Qms - 2.2
Qes - .25
Vas - 17 cubic ft
Fs - 30 hz
Le - 1.4 mH

Thanks in advance!

Regards, Ron

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