How to Build Your Powerful, Quality Automotive Sound???

  To mount a complete automotive sound for your vehicle and a "marriage" of sound frequencies, where accessories such as Subwoofers, Mid Range / Woofer speakers and Super Tweeters come in.
  The speaker is what we call a transducer, that is, the element that will transform the electrical signal coming from the main unit into sound waves. The choice of car speakers should be viewed carefully, and also different types of products, each with its advantages and ways of using. Pay attention to the manufacturer's specifications of the car speakers. It is always important to be aware of the power in WRMS, as this is the actual power of the speaker. For a simple sound design for your car, you may want to purchase a pair of triaxial or coaxial speakers.

  The 2 way kit consists of woofers and tweeters. Through the woofers the mid and low frequencies are emitted, as well as a separate tweeter for high frequencies and a crossover (frequency divider). The sound gets distorted and cleaner inside the car, with the stage feel, like it's in a show. This occurs thanks to the division of the frequencies, each one being directed through a place.

  The subwoofer is a specific car speaker for bass and subwoofer frequencies, meaning you do not listen, but you feel the sound. The subwoofer is important to complement the automotive sound with the bass. When choosing a subwoofer for cars, it is important to have defined the type of sound you want to get and the space you want to occupy. Some subs of 10 "may behave as if they were 12" or 15 "because of the higher power.
 The subwoofer needs a box, whether ductless or sealed, to be installed and able to reproduce the low frequencies. Each loudspeaker for automotive sound has an ideal sealed / ducted box size to be used. Installing the speaker in a correct sized box causes the speaker to reach the maximum level.

 The amplifier is an electronic equipment that receives an audio signal through the input, amplifies the signal and distributes in its output to the automotive sound speaker system. Choose the amplifier with care, thinking exactly the result you expect from your project so you do not need future changes to the modules. You can use only one module with more outputs, which will serve for voice and bass,

or independent modules.

  The crossover is important for splitting the frequencies on different tracks of the audio system. When a signal passes through the crossover, it is divided into several tracks, in low, medium, low, high and low, where each one has a frequency range. This division is essential so that each type of frequency is routed to the correct speaker.

  To choose the Sound Design Main Unit, whether it is a CD player, DVD player, MP3 player or multimedia center, you must be aware of the sound fidelity they transmit. This means having a reasonable number of RCA outputs and a power capable of effectively reproducing the sound on the speakers. It is also important to check if the device has pre-set and also configurable equalizations, as this ensures good sound regulation, ie you can hear each frequency distinctly without distortion according to the type of music you are listening to and with your personal taste. Nowadays, it is very important to pay attention to the connectivity present in the devices, since it is possible to listen to songs through USB input, connection with Android, iPhone and iPod. Some devices also offer digital TV, integrated GPS and Bluetooth, whether to listen to music from the cell phone or to talk on the phone. In this regard, there are not many distinctions, several are the brands that can be acquired

  The amount of energy (battery) is critical to choosing the power limit of your system. Generally in cars, the original battery amperage is 45 to 60 amperes. However much of this amperage is used for the car's own electrical components. In addition, when using for example an amplifier module, we use very long cables and we have losses as well. Taking into account these two factors, we can use approximately 30% of the original battery power. So having to put a battery with a higher amperage

SOURCES:

http://blog.itaro.com.br/2014/11/som-basico-para-carro/
http://blog.lojadosomautomotivo.com.br/como-montar-e-escolher-o-melhor-som-automotivo-carro-basico-ou-completo-3979