This is my first measurement of these phones:
First I took the headphones apart to measure the raw driver. You can see I was unable to hold left side tight to the measurement rig b/c the wires are fastened pretty close to the housing and I have no desire to try to solder these again.
Next I put the drivers in the housing without damping material just to see what would happen.
Ready to surrender for the day, I put the stock pads back on for another measurement to see how it might compare to the first measurement:
Next I held them loose on the measurement rig to see what effects the seal has.