By

Brook Walsh
A secured secondary lithium car-audio battery beside an amplifier in an SUV cargo cubby
A bigger battery isn’t automatically the right fix for a bigger stereo. Whether you need a second battery for your car stereo depends first on system...
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An installer routes separate power and RCA cables beneath the carpet on opposite sides of a car.
Start with two separate routes: run the amplifier power wire beneath the carpet and trim along one side of the vehicle, then route RCA cables along...
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A technician operates a motorized amplifier rack as it slides out of an SUV’s cargo area.
A sturdy motorized amp rack starts with a secure mounting plan and room for airflow. For a vehicle setup, use a board about 1/2 inch thick, at least...
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Technician wires a passive bi-amped component speaker system inside a Boyne City installation bay
More amplifier channels don’t automatically mean more output. The benefits of bi-amping car speakers depend on how the signal is divided: separate...
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Customer listens while a technician measures SPL in a finished custom car-audio installation
The loudest system isn’t automatically the best-sounding one. A sound pressure level (SPL) vs sound quality (SQ) comparison comes down to two goals:...
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A technician compares passive and active crossover wiring for component speakers on a car-audio workbench.
The more adjustable crossover isn’t automatically the better fit. Choosing active vs passive crossovers for component speakers comes down to where...
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An installer secures a shared chassis ground for two car amplifiers in an SUV cargo area.
In a multi-amplifier system, the ground path matters as much as the power feed. To understand how to properly ground a car amplifier, use a short...
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Technician measuring residual noise from a car amplifier on a 13.8-volt test bench
An amplifier’s signal-to-noise ratio tells you how far the wanted audio sits above background noise, measured in decibels. To understand what...
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A direct-fit AGM battery with fused audio power wiring in a car’s engine bay
The best battery for a car audio system may be AGM, not lithium. For systems under 1,500 watts, a direct-fit AGM upgrade is a practical starting...
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A technician connects an update cable to a windshield-mounted radar detector inside a car.
Start with the exact model of your radar detector. To learn how to update radar detector software, download the updater or file intended for that...
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