Hi,

I recently aquired a pair of GPA 515-16G woofers.
They measure close between the two, but wildly different compared to factory T/S specs..
These are labeled on the back as "horn loudspeakers", but my Qts measurements from both are 0,4, way too high for horn loading.
This is double the value they are supposed to be at 0,21. Fs is also much higher at 48hz vs 37hz factory spec.

All this has made me wonder if the cones are original. They have P/N's GPA-10494 on the first line and 10 236 below, can anyone verify if this is correct please?