John, yes the high and low sections of the speaker are wired in parallel, but that doesn't mean that, for example, a two-way 8ohm speaker has two 16 ohm sections operating in parallel to result in the overall 8 ohm rating. The effect of the crossover is to greatly raise the impedance of each section of the speaker as it passes out of its frequency range. For example, if the effective impedance of the 8 ohm midwoofer was 80 ohms at 5KHz, while the impedance of the tweeter was 8 ohms at that frequency, the reciprocal of the net impedance of the speaker at that frequency would be the sum of the reciprocals of the impedances of the individual speakers, i.e. 1/8+1/80=1/T; 11/80=1/T; T=7.27 ohms. So, two 8 ohm sections in parallel result in about an 8 ohm, not 4 ohm, speaker.
