Analog signal processors, line drivers and OEM integration — the connective tissue of a clean install.
In 1978, Zapco introduced the world to audiophile signal processing with the iconic PEQ 18-band equalizer — the first high-voltage output processor for the car. Built with high-grade mil-spec slide pots and premium internal components, it showed the industry what in-car sound processing should sound like. That foundation was followed by a series of audiophile-quality processors: the first parametric car EQ, innovative electronic crossovers, a 30-band mono EQ, an advanced noise gate, and even an outboard D/A converter that surpassed most home converters of the era.
Now that most head units and amplifiers have processing built in, Zapco continues to offer outboard processors for the same reason a top home or pro system separates its tuner, preamp, and power amp: each unit doing one job, and doing it right. Zapco processors use the same Elna Silmic II RFS caps and Analog Devices OP 275 op-amps found in the LE/LX competition amplifier series, paired with custom-wound precision pots built to Zapco's own specification. For those who believe the live musical experience is worth the extra effort — and that the sound is what matters most — Zapco has been the driving force since 1974.
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