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Old 04-10-2003, 09:06 AM   #19
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Join Date: Aug 2002
Location: Chicago Burbs
Posts: 449
My Ride: '02 325Ci
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Thanks for the informative post - I'll try to get a steeper xover going on them to see if it fixes the imaging. Right now, I'm using a 24db slope low pass at 120hz from the JL Amp.

They sound fine to me going all the way to about 45-50hz.

Originally posted by spr0cket
The JL 8" drivers have a lower FS and also greater excurison capabilities than the 10" or 12" drivers in the same range.

The 8" driver has a resonant frequency of just below 40 Hz the big difference in output level is due to the cone size and resultant piston area - hence the greater efficiency of the larger drivers.

I run the 8" stealths up to 80Hz, but with a steep 36dB slope on them to stop the image of the bass drifting rearward. If using a shallower slope around 12 or 24 then I'd go no higher than 65 Hz with them. But they'll reah all the way down to mid 30Hz with no trouble.
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