Audio Wiring / September 6, 2018 / Raquel Dufour.
You still need to snake this cable into the trunk, but the back seat is in the way. Many cars have different methods of installing/removing rear seats. You’ll most likely have to remove the place and re-install it after you’ve installed wires. Consult a repair manual for seat removal instructions.
Today one gets the sense that all types of communication have chosen to convert to a digital system. Some digital equipment may have made its way into the sound system of the average automobile, but most the present-day cars still use an analog sound system. The requirements of an analog system dictate the construction of the audio power amplifier and the audio preamplifier.
Connect the radio to a constant 12-volt source, an ignition lead, the amplifier turn-on, and the antenna. On newer cars, the constant 12-volt and the ignition wire connections can be made through the factory wire harness. On older cars, the fuse block can serve as the continuous 12-volt source.
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.