In the list, JBL Thiele/Small-list I can read that the LE14-A have an Fs about 28Hz. If consider the variation in Fs specs to be ± 5-10% it could be approx 25.2 Hz at the lowest.
Now, I just have finished a refoaming of a pair of those LE14-Aś. After all refoaming was done, and the glue has dried I was able to measure the Fs on those woofers. My readings says 21 Hz on the woofer that had some 4-5 hours of braking in. The other one that had no braking in time measured Fs to be 22.5 Hz??
So my question is, did JBL use different types of foam surrounds, spiders or different amount of aqua-plas on the LE14-A? Or, is the Fs specs of the LE14-A in the list wrong
Or was it the wrong foam surround installed.............
note, the foam surrounds came from Rick Cobb and they fitted perfectly on those speakers (old foam was originally fitted/glued on the rear of the cones, and the same did I).
Any suggestion why this miss-match has shown up would be great?