sparky,
The impedance of a capacitive or inductive ckt. depends on the reactance of the ckt., which is related to the frequency of the current flowing.
Inductive reactance (XL) = 2 x 3.14 x Hz. x inductance (in henrys). therefore, as frequency increases, so does impedance (in ohms reactance).
Capacitive reactance (XC) = 1 divided by 2 x 3.14 Hz. x capacitance (in farads). therefore, as frequency increases, impedance(in ohms) decreases.
The drawing shows a sort of low-pass filter(woofer) which is mostly inductive, limiting high frequencies.
The tweeter section is a high-pass circuit, allowing only high frequencies, due to the capacitive nature of the ckt.
Or so I think. My terminology may be off. Someone make corrections as required.
