The HD measurements at distance 315 mm and voltage levels 2 - 8 Volt were carried out with digital High Pass Filter (2nd order Butterworth type, 50 Hz cutoff, HPF2-50)
The HD measurements at distance 315 mm and voltage level 11.2 - 16 Volt were carried out with digital High Pass Filter (2nd order Butterworth type, 80 Hz cutoff, HPF2-80)
The voice coil current HD measurements were carried out with digital High Pass Filter (2nd order Butterworth type, 50 Hz cutoff, HPF2-50)
Before taking the measurements the speaker had been very good broken-in
The detailed review of the MR16TX-8 speaker