HiFiCompass would like to express deep gratitude to Tihomir Haralovic for his help in replenishing our measurement database and for kindly providing the SB Acoustics SB14ST-C000-4 tweeter for testing. Tihomir Haralovic graduated physics in Zagreb University, Croatia, and is the owner and chief audio engineer in Neutrino Audiocompany, which develops high-end analog active crossovers and loudspeakers. Tihomir and his team believe that an analog active crossover is a much better choice for an audiophile than digital (DSP).
The HD measurements (315 mm) at voltage levels 2 - 5.6 Volt were carried out with High Pass Filter "on" (2nd order Butterworth type, 1500 Hz cutoff, HPF2-1500)
The voice coil current HD measurements were carried out with High Pass Filter "on" (2nd order Butterworth type, 1500 Hz cutoff, HPF2-1500)