Your car radio, a technological gem on paper, diffuses a pearl of nasal and almost unintelligible sounds. However, your car has hi-fi speakers. The solution to stop subjecting your ears to the torture of this in harmonic drumming is to attach an auto amp to your audio device. How to choose it? What are the most determining characteristics? How to select the material to avoid a complicated installation? The answers to all your questions in this guide designed to facilitate understanding for those who are less informed on the subject.
Why buy an auto amplifier?
Still having some reservations about buying a car amp? Find out how the device works, and you will understand why you should install it. To get started, check that the basic constituents of your car’s sound system are working. Then check that your well-charged battery releases normal electrical voltage. If all these parameters are normal, an auto amplifier seems necessary to raise the acoustic performance of your equipment. So what is its role?
Imagine the usual path of a musical signal. Emitted by the car radio, it lands at a loudspeaker which multiplies its resonance. Often the loudspeakers are not enough to render a signal in its integrity. To make up for the losses, the amplifier is positioned between the two ends. Filtering the sound, boosting its power, ultimately improving the quality of the sound distilled in your automobile, that is its function. And that, without modifying the melodic structure, that is to say by maintaining the distribution of the acoustic units which compose the signal.
How to choose your car amplifier?
An amp should adapt to your car’s multimedia setup, like the shoes on your feet. Too large, moccasins are unusable. Too tight, they do not fit. The choice of model is therefore very important, the same goes for the amplifier of your automobile. On the other hand, instead of paying attention to the size and the shoe size, you can be interested here in the characteristics of the device. To this end, this electroacoustic micro glossary provides you with the essential details to facilitate your purchase.
In the beginning: the power
This is the fundamental characteristic of an amp. In simple terms, this denotes the electrical energy impelled by the device to the loudspeakers. You will encounter two types of numbers affecting the same car amplifier. First comes the RMS power, an English acronym that is declined as follows: Root Mean Square. Expressed in watt (sometimes called “watt RMS”), It indicates the real power communicated to the loudspeakers for normal use. As for the power on paper, it is the maximum potential energy of the car amplifier.
Filtering in some cases
A device fitted with a filtering system makes it possible to select the most suitable frequency according to the characteristics of the loudspeaker. It usually takes the form of a high-pass filter or low pass. Most filtering obeys a setting maintained at 80 Hz. On the other hand, there are more complex configurations, which favor a wider choice of frequencies, including the cutoff one. You can thus put high frequencies on standby to feed subwoofers. The filtering also helps in the use of tweeters, because it would be necessary to cut the low frequencies.
It represents the voltage tolerable by a loudspeaker. Its importance here? It affects the functioning of the amplifier. Indicated in ohm, the unit of electrical resistance, the impedance therefore guides the choice of the car amplifiers. A low resistance speaker requires more effort from the auto amplifier than a higher resistance speaker. Car speakers, most often, turn into 4 ohms. Care should therefore be taken to opt for an amplifier capable of providing sufficient power to drive the speakers without disturbing their operation.