It might also be the die cast hoops as some people have mentioned.Mostly I was just asking whether the sharp shell attack/low head resonance is due to the 30 degree bearing edge or not.
Anyway, it's been decided that:
- all the sound is in great heads
- that great Gretsch sound is all in our heads
(Disclaimer: I like Gretsch drums - just mentioning that before I cause a commotion)