Skip to content
BRL Electronics

Can I use the car’s factory speaker cables with a new amplifier?

Yes, in many cases you can use the car’s existing speaker cables when installing a new amplifier.

This depends on factors including the amplifier’s power, which speakers will be driven and how the car’s factory system is designed.

When are the factory cables suitable?
For smaller or moderate audio upgrades, factory speaker cables may often be sufficient.

This assumes that the cables are in good condition and adequately sized for the load.

For more powerful installations, it may be advisable to run new speaker cables.

What should I check?

  • Cable size: Thin cables can cause greater power losses and heat generation under high loads.

  • Speaker impedance: Lower impedance may mean higher current through the cables.

  • Amplifier power: More powerful systems may require larger cables.

  • Factory system design: Some cars have factory amplifiers, crossovers or other components that affect the connections.

  • Cable routing: It is important to know which cables go to each speaker.

Can I connect a new amplifier directly to the car’s factory speaker cables?
Some installations can use dedicated adapter harnesses to connect the amplifier’s speaker outputs to the car’s existing speaker cables.

However, it is important to ensure that the new amplifier’s outputs are not connected to the factory amplifier’s outputs.

Two amplifier outputs must normally not be connected to the same speaker circuit simultaneously, as this can damage the equipment.

Cars with advanced factory systems may also have separate cables for different speakers or special crossover arrangements.

Contact our customer service team with the car model, model year, factory system and amplifier you want to install. We can then help assess whether the factory cables can be used.