The harmonic distortion measurements at voltage levels of 1.41 - 8 V were carried out using the measurement signal passed through a 2nd order Butterworth high-pass filter (F3 = 300 Hz, hpf2-300) and a 4th order Butterworth low-pass filter (F3 = 10 kHz, lpf4-10000)
The voice coil harmonic distortion measurements at voltage levels of 1 - 2.83 V were carried out using the measurement signal passed through a 2nd order Butterworth high-pass filter (F3 = 300 Hz, hpf2-300)
The review of the BlieSMa M74T-6 midrange speaker