Yamaha JA-0803

The HD measurements at distance 315 mm and voltage levels 2 - 5.6 Volt were carried out with High Pass Filter "on" (2nd order Butterworth type, 200 Hz cutoff, HPF200)

The HD measurements at distance 315 mm and voltage levels 8 - 11.2 Volt were carried out with High Pass Filter "on" (2nd order Butterworth type, 300 Hz cutoff, HPF300)

The voice coil current HD measurements at voltage levels 1 - 4 Volt were carried out with High Pass Filter "on" (2nd order Butterworth type, 200 Hz cutoff, HPF2-200)

The voice coil current HD measurements at voltage level  5.6 Volt were carried out with High Pass Filter "on" (2nd order Butterworth type, 300 Hz cutoff, HPF2-300)

The Yamaha JA-0803 midrange driver with a 2.7” beryllium dome diaphragm was used in the loudspeakers:

Yamaha NS-1000X - https://audio-database.com/YAMAHA/speaker/ns-1000x.html