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Message: <blockquote data-quote="helotaxi" data-source="post: 3058862" data-attributes="member: 550915"><p>The speakers in a passive setup are in fact wired in parallel.  The corssover acts like a resistor whose value changes with frequency.  For a low pass filter, the impedance of the crossover itself increases as the frequency increases past the filter frequency.  A high pass filter works exactly the opposite.  Wire the two in parallel and the result is that the impedance of one half of the circuit approaches infinity as the other approaches the nominal impedance of the driver on that half of the circuit.  The total result is that the nominal load "seen" by the amp is the same as the driver that is playing that given freq.  If the mid was a 4 ohm and the tweet was an 8 ohm, the amp would see 4 ohms below the crossover freq and 8 ohms above and somewhere between the two right around the crossover freq.</p></blockquote><p></p>

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