Where, if not in a car at speed, listen to energetic music filled with bass. But loudspeakers cannot always convey a bass drive. Instead of a soft and supple rhythm, we hear a rumble. To correct the situation, a subwoofer or in another way a woofer, which is adapted to reproduce sound in the range from 20 to 150 Hz, will help.
Crossover Installation
You need to immediately determine the term "crossover". In this case, this is not a car, but a device for dividing sound by frequency. The subwoofer obeys those low-frequency frequencies that are unattainable to simple speakers. As a rule, this is characteristic not only of car speakers, but also of hi-fi components.
Most often, the subwoofer has to take on the sound load from 20 Hz to 40 Hz, and then from 40 to 80 Hz. The frequency margin will enable the speaker to reproduce sound more clearly and in more detail in the low-frequency range.
But even the most high-quality and expensive subwoofer will not be able to clearly work out frequencies if they are not cut off by a crossover.
First you need to cut off the mid and high frequencies from getting on the subwoofer. The thing is that speakers can also reproduce 60 Hz, and some 50 Hz, 40 Hz and even lower. So that the low frequencies from conventional speakers do not overlap with the frequency of the subwoofer, a low-pass filter is used (the English abbreviation LPF, or low pass filter). Such a filter is tuned to the lower frequency of the mid-range speakers, or better, five hertz higher from the edge. The sound of the speakers will not overlap, the hum will decrease, the bubbling will disappear, and softness, transparency and detail will appear in the lower case.
But that's not all in the subwoofer settings. He will try to reproduce lower frequencies that the human ear does not hear. We cannot hear the sound itself, but the interference from these frequencies and the rattling of the speaker itself, from an attempt to perform an impossible task - is quite. In order to save the subwoofer from overload, and our ears from the pressure of low-frequency vibrations (they can ruin the device and hearing organs), a sabsonik is used.
It cuts off all the low frequencies inaccessible to human hearing, eases the load on the speakers and amplifier. Usually used in acoustics bass reflex. This is a hole in the form of a bell in the acoustics case, through which the signal is divided into two 180 degrees shifted in phase. The phase inverter helps to expand the low frequency range. But to remove the excess of such oscillations, the sabsonik is tuned so that it cuts off the frequencies 5 Hz lower than the frequency of the port of the bass reflex.
Volume setting
To adjust the volume of the subwoofer so that it is consistent with the rest of the system, does not clog it and, at the same time, does not give distortion, you need to use the Level Gain controls, which in Russian means Level and Gain.
Usually a button looks like a screw head. We turn the level with a screwdriver to a certain value until the signal starts to sound distorted. We return the control back until the sound suits us. The signal is fed to the amplifier at a predetermined frequency. Sensitivity is set to minimum.
Location
Sound from the subwoofer should go in front of the person sitting in the car. This is the most correct direction for the perception of low frequencies. If the bass beat in the back of the head, then soon the music will begin to act on the ears, and after them on the psyche.
Proper tuning of the sound of low frequencies in the car will be the key to a good mood and, of course, proper and safe driving.
