Frequently Asked Questions
Should I use first-order or second-order crossover?
First-order is simplest and most phase-linear but lets more out-of-band energy through. Second-order rolls off more steeply and is the most common DIY choice for protecting tweeters.
Do I need impedance compensation with a crossover?
Often yes. A Zobel network flattens the woofer's rising impedance so the inductor behaves as intended at the crossover frequency.
Why does a second-order crossover flip tweeter phase?
The second-order network introduces a 180-degree phase shift. Many designs reverse tweeter polarity to restore a flat summed response through the crossover region.
Will textbook component values work without adjustment?
They are an excellent starting point, but real driver impedance curves and baffle diffraction mean some measurement and tweaking are needed in a serious design.
What is Linkwitz-Riley alignment?
A crossover alignment that uses fourth-order filters to achieve a flat summed acoustic response at the crossover frequency, and is often preferred over Butterworth for this reason.
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