How To Choose Your Car Amplifier?

A mounted car amplifer

The amplifier is an electronic device whose role is to increase the power of the audio signal. It increases the voltage and the intensity of the signal supplied by your source to increase the dynamic, the power, the softness, the low, the bandwidth and more generally the sound quality.It replaces advantageously the small module built into your source that is satisfied with the battery voltage and low intensity to try to control the speakers. Unlike a car stereo, an external amplifier is equipped with a transformer which makes it possible to raise the voltage (and the quality) of operation.

An amplifier is essential for a quality installation. There are different types of amplifiers for different uses. Their effectiveness differs greatly.

  • Class A and its very low efficiency are reserved for domestic use.
  • Class AB is used in the majority of car audio amplifiers. It is an excellent compromise between softness, sound quality, and efficiency. This type of amp is usually used for front and rear speakers.
  • Class D shines with its high efficiency: it provides more sound and consumes less current. It’s heating is also much less. Less qualitative, but more quantitative, this class of amplification is very often used for the reproduction of the low frequencies (Subwoofer).

An amplifier is characterized by different parameters:

  • Power: it must be adapted to the power that can be borne by the loudspeaker that is connected. To operate properly, an HP must have the same RMS power as the amp (Hp 50W RMS -> amp 50W RMS). Beware of the impedance that causes the power amps to very heavily.
  • A number of channels: A 2-channel amp amplifies right and left front or rear), a 4-channel amplifier such as the Oxygen Spiral F 200.4 4-channel amplifier, or a 5-channel amp The Boss-Audio CE2505 amplifies right and left front and rear, a special mono block allows you to amplify one or two subwoofers. But beware, there are mono channel amplifiers, like the MTX TH-1500D mono channel amplifier, capable of amplifying speakers.
  • Signal to Noise Ratio: This is the measurement of the level of background noise added to the original signal by the amplifier. The higher the value, the better the amp is built (-85dB is better than -75dB).
  • THD + Noise: This is the difference between the original signal and the amplified signal. The lower this rate is (THD = 0.01%), the more faithful and efficient the amp.