Re: Jerry-rigging a passive crossover
Your crossover will keep the amp from seeing the actual parallel load of the two coils. That's what the crossover does. It increses the apparent load on the amp in the out of band region for the driver it is wired in series with. The basic result is that in the freqs that hte tweeter plays, you have the coil of the tweeter wired in parallel with what ammount to a load heading for infinity as the frequency goes away from the crossover point. The final load seen by the amp is the impedance of the driver that covers the frequency at which you are testing the impedance.
Something to realize is that you're not measuring impedance with the DMM when you measure a coil. You are measuring DC resistance. Impedance is a resistance to AC and varies with frequency. The impedance of a driver will most always be a bit higher than its DCR. 3.5 ohms DCR is about right for a nominal 4 ohm driver.
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