I have been trying to get accurate T/S measurements for this speaker before I purchase and the search has been elusive. I received T/S data today from GPA that is at variance from other sources. The speaker seems to have good characteristics but before I build a cabinet, I would like accurate data.

From GPA 414-8B
RE 7.28 ohms at 25'C]
FS 25.6 Hz
QTS 0.22
QMS 7.53
QES 0.23
SD 78.54 in2 (0.051m2)
XMAX 0.15in (4mm)
VD 11.79in3 (0.19L)
VAS 9.29 ft3 (263.1L)
No 1.85%

Posted at 41Hz Audio website
FS 29Hz
QTS 0.254
VAS 379.62L


Trying to get good measurements on this speaker has been daunting. Has anyone actually measured it and would care to post their data?? Any references for the T/S measurements?

Any help would be appreciated.