WW,
Comments follow your text.
Originally Posted by Mr. WidgetOriginally Posted by Mr. Widget
Sometimes the only way to get a point across is through repetition where the issue is recast in different words. Will try one more time:
Since our purpose wasn't to determine the absolute value for each driver but rather the relative performance between them
1) If the ‘what’ to be discovered and measured is hidden or suppressed under horn artifacts, then the ‘what’ remains un-observed (masked) or at least misrepresented.
2) Using either test jig (horn or PWT), the measurements are relative because
a) the unit used is dB (which is a ratio), and
b) it is cast with respect to the parameters frequency and driver.
So, in either case, the data set for each driver contains only “relative” measurements not “absolute” ones.
I think you are going over board.
That is your opinion, so be it.
Of course if you would like to make us a PWT, I'll be happy to use it in future tests. It would be nice to have one for 1", 1.5", and 2" drivers.
Cost more to ship a completed unit than to simply perform a local build. As the procedure for building them is sufficiently ‘Gerberized’, the DIY route would be the most cost effective approach to acquisition. For most, if not all, JBL compression drivers, a PWT power response sweep is published. Some are also provided in the referenced articles [1] & [2] and JBL authored technical notes.
BTW: your link didn't work... I did try to check it out.
A complementary copy of the AES standard [1] may be obtained at the following (AES revised) URL: http://www.aes.org/publications/stan...rtesy.cfm?ID=1
If you want a copy of the companion article [2], will be more than happy to e-mail it to you.
Regards,
WHG