For the Thiele-Small method, the ATB uses a sinus sweep. Reference can be made to up to 500measured values at a frequency spacing of 0.01Hz. Since the frequency deviation remainsbelow 1%, the ATB is one of the most precise Thiele-Small measuring units.22.3 THE VOICE COIL INDUCTANCEFor the development of a crossover there is to know the voice coil inductance.The inductance is measured by the TS program. The inductance is complex impedance.Therefore the normal L meters are wrong.jωRLrRLZThe calculation of the voice coil inductance L.jωR rR = 0LLfalschZThe picture shows the calculation of a normal L meter. For this calculation R is very small, andthis is right for a normal inductance. But for speaker it is wrong.23.4 PROCEDURE72
