ScanSpeak 12MU/4731T00

The THD measurements at distance of 315 mm and voltage levels from 2.83 Volt to 8 Volt were carried out with High Pass Filter "on" (2nd order Buttreworth type, 80 Hz cutoff, HPF2-80)
The THD measurements at distance of 315 mm and voltage level 11.2 Volt were carried out with High Pass Filter "on" (2nd order Buttreworth type, 150 Hz cutoff, HPF2-150)
The voice coil HD measurements were carried out with High Pass Filter "on" (2nd order Buttreworth type, 80 Hz cutoff, HPF2-80)

Before taking the measurements the speaker had been very good broken-in