The THD measurements at distance of 315 mm and voltage levels 2.83 - 11.2 Volt were carried out with High Pass Filter "on" (4th order Butterworth type, 2000 Hz cutoff, HPF4-2000).
The tweeter has three taps with different sensitivity - 90, 91.5 and 93 dB.
The measurements were carried out at the 93 dB/2.83 V tap.