Audio Wiring / September 8, 2018 / Bristol London.
Amplifiers have class according to their efficiencies. Class D car amps use transistors to control power distribution within the amplifier. When the voltage in the amplifier rises to a certain level, then the transistors in a Class D car amp will automatically turn off. This ability of the transistors to turn on and off allows the Class D car amp to draw less current than the Class A or AB amplifier. Because it draws less current, the Class D car amp also produces less heat. In other words, it is more efficient.
Route the signal cables (RCA cables) on the driver’s side of the car from the head unit to the amplifier. Ground the amplifier to a clean metal surface on the car’s chassis. The ground should be no more than 18 inches from the speaker. The ground cable must be the same gauge size as the power cable used.
Mono amplifiers can frequently offer one big advantage to the car owner with a pair of subwoofers. If each subwoofer has a 4-ohm resistance to the current flow, then those two subwoofers would fit safely in a parallel circuit with the mono amplifier. Such a wiring arrangement is commonly used by the car owner with a car amp.
The audio preamplifier has several different functions. Its primary function concerns conversion of the sound information carried by the audio system’s electrical signals. The analog sounds produced by the car radio or the CD player enter the audio system as low-level signals. These low-level signals travel through the audio system to a pick-up or a transducer.