Originally Posted by aracu
Are you sure the Senn 800 diaphragm is not larger than the 8000 series diaphragms?
The MKH 20/30/40 series definitely had a 16mm diaphragm and I'm pretty sure the MKH 80 had as well.
The MKH 800 was an extended frequency version of the 80.
The MKH 8000 series definitely have the same 16mm diameter diaphragm as the 20/30/40 series.
The original series had a screwed capsule, which increased its diameter, the 8000 series has a glued capsule that keeps the overall diameter extremely small so it fits into the 19mm diameter housing.
So, although the 8000 series is 6mm smaller in diameter than the 20/30/40 series, the capsule diaphragm diameter is the same.