The Gauge of Wire From a Crossover to a Speaker | It Still These units are most commonly found inside speaker cabinets and packaged with speaker systems designed as components for car audio. These require speaker wire. Active crossovers are powered devices, placed between a preamplifier and amplifier. Active crossovers use RCA signal cables and adjustable crossover points to divide the signal. Car Audio Crossovers: Do You Need Them? - Lifewire The fact is that every single car audio system requires some type of crossover in much the same way that every car audio system requires some type of amplifier in the same exact way that many head units include a built-in amplifier, speakers can also include built-in crossovers.
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