You do not always need an aftermarket stereo to hook up amp and sub in your car. In many vehicles, an amplifier and subwoofer can be added while keeping the factory head unit, factory controls and original infotainment system.
The correct method depends on the vehicle and factory audio system. Some amplifiers and powered subwoofers can accept a speaker-level signal directly from the factory stereo. In other cases, a line output converter, DSP interface or vehicle-specific integration module may be required to convert the factory signal into a suitable input for the amplifier.
An aftermarket stereo can sometimes make the installation easier because many units include RCA preamp outputs for front, rear and subwoofer signals. However, replacing the factory stereo is not always practical in modern vehicles, especially where the original screen controls vehicle settings, reverse camera, parking sensors, steering wheel controls or warning chimes.
The most important factor is getting the signal integration right. Poor signal connection can cause low output, noise, distortion, incorrect bass response or loss of factory audio functions.
For the best result, speak with your nearest Focal Authorised Australian Dealer. A professional dealer can assess your vehicle, confirm whether the factory stereo can be retained and recommend the right amplifier, subwoofer and integration method for your Focal car audio upgrade.
