The terms and symbols that need to know and use when choosing an amplifier.
One of the main characteristics of all car amplifiers. Sometimes nominal (RMS) and maximum (PMPO). As a rule, all the amplifiers have a number on the body. What appears on the shell of the amplifier is usually out of science fiction - it is the total maximum power of all channels is distorted, to believe this figure is impossible since this is not anything but a publicity stunt to lure the buyer manufacturer. In the data sheet or on the box in the characteristics of the rated power available - power that must be believed if it is listed with due THD (<0.1%) and at a voltage of 14.4 V. At maximum power especially pay attention is not necessary, because the Power is from the bulldozer. Very cool it is when supplied with power is a certificate, which indicated the factory stood a real power amplifier with serial numbers. Such measurements can be seen in Alpine products, MTX, Rockford Fosgate, and other major manufacturers. It is also worth knowing that if the majority of firms deliberately overstate the power, such as the manufacturer DLS intentionally underestimates her in performance, according to the total power amplifier take place in a lower category of the car audio competition, make it easier to win them.
Today, almost any power amplifier has a built-in crossover. It allows you to trim the frequency, is amplified below (HPF - High Pass Filter - High Pass Filter) and leave only the treble or top (LPF - Low Pass Filter - Low Pass Filter) and leave only the low frequencies. Most modern amplifiers have a continuous adjustment of the cutoff frequency. There are also switches that allow you to multiply the frequency by 10 (X10) and thus carry on-channel amplification without using an external crossover acoustics. For example Eton ECC 500.4, Audison SR 4. Also very cool that you can change the slope of the recession cut - 6, 12, 24 dB.
It is usually denoted by regulation, which allows for the enhanced bass component of the sound. Current Connection for subwoofers. Well, when this filter allows you to select the frequency at which it is possible to enhance the bass, and not simply to strengthen it and smoothly in decibels.
Input a high-level signal. It is used in systems with a head unit or radio when no line outputs. Connecting on it is not the best option because You will receive the volume of the audio head unit amplifier distortion. It is used only when no other option.There are amplifiers that can start working on the signal presence on such access, that is not to be sought in a regular car Remote system for them.
Bridged connection. Usually indicated by brackets at the terminals to connect speakers to the amplifier. It gives summed power gain of 2 amplifier channels. It is used as a rule for connecting a subwoofer.
Input for line conductors on which the power is fed to the signal from the car.
Helpful tips and advice when choosing an amplifier.
When choosing a power amplifier in the first place I recommend to pay attention to the manufacturer. There are many already legendary firms that produce amplifiers in a car for more than one decade and have gained in this field, a well-deserved fame. Remember that an unknown brand is unlikely to you than surprise, as if he was not praised in the sale. And to listen to the amplifier in the car hardly any car audio shop agrees.
For amplifier speakers pay more attention to the sound quality by selecting the amplifier to the subwoofer output is more important. Very good when the powerful monoblock has the built-in fan and remote volume control, as in the high-level input - very convenient when connecting to a standard head or tape that does not adjust the subwoofer volume.
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Where most established (installed) power amplifiers in the car.
Power amplifiers often are placed in the trunk - in the rear seat backrest, under the car seat on the rear parcel shelf in the cellar, on the trim panel of the luggage compartment in the corner. During the installation of the amplifier is not necessary to refer to those installers who can not configure it. Setting the amplifier - the procedure is not complicated, but always necessary and if the installer can adjust the power, then there is a great probability that he will set him wrong, as a result, you will not get him the desired effect.
