Audio Wiring / September 4, 2018 / Ally Saldivar.
When a car owner plans to purchase a car amp, then that car owner must give thought to the amplifiers desired efficiency. The effectiveness of an amplifier represents the rate of power output into power input. Two primary factors determine an amplifier’s effectiveness: the power dissipation within the car amp and the distortion of the audio signal that comes from that same amplifier.
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.
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.
If you are using passive crossovers with the component speakers in the front and rear of the car, hooking up these crossovers can also affect the ohms load seen by the amplifier. Hooking up the passive crossovers’ positive and negative properly can be a concern. Follow the speaker manufacturer’s instructions carefully.