Measurements of the C3
impedance show that it has a low of 4 Ohms at 200 Hz, and a high of about 20
Ohms at 75 Hz and 2.6 kHz. The tuning frequency is at 40 Hz. where the
impedance dip is located. The peak between 2 and 3 kHz is due to the
crossover network. Electrical
phase shows that it is mostly capacitive below 200 Hz, and mostly inductive
above 200 Hz. The electrical phase is computed against a defined phase of 00
for resistive impedance (the horizontal line in the middle of the graph,
marked as "0" in the right hand column). So, for example, at 1 kHz, the
phase is about + 370 with respect to the resistive impedance
phase. Negative phase is capacitive, and positive phase is inductive. The
small notches in the phase curve are probably due to resonances.
Terms and Conditions of Use
|