【School】 how to choose the weak of car speakers car audio.

<br> speakers, car audio host is the most important part, like the human brain, what kind of sound to be issued may be controlled by the brain. .The speaker is like a human voice, the sound is sweet, it is necessary to see how the voice. .<BR> <BR> Speaker known speakers, its role is to convert the audio signal into a sound signal to the surrounding air medium radiation. .Car speaker cone design to the most common, it is because the installation location in the vehicle under limited circumstances, tapered design can expand as much as possible the effective area of the diaphragm, and diaphragm determines the effective area of the low-frequency response of speakers .. .That is, tapered design can not install the case of bass, bass effects. .<BR> <BR> In accordance with the zoning, the speaker can be divided into full-frequency, low frequency, medium frequency and high frequency 4. .Forms of energy conversion can also be divided into electric, electromagnetic, piezoelectric, electrostatic peace panel, car speakers to electric based. .<BR> <BR> That coaxial speakers full-range speakers, it is the low frequency unit and high-frequency units are designed in the same axis line, the outside is low, the inside is a high frequency, but the voice on the same physical point .position. .This design can eliminate the high and low frequency range because of different unit caused by the sound shift, but because of the high, the bass is issued from a point, so the distortion sounds great. .<BR> <BR> Divided into 2 speakers and 3 frequency divider, 2 divided by the tweeter and bass units, 3 frequency is coupled with the midrange driver. .Because each unit is responsible for different frequencies, broadening the frequency range, so as to solve the problem of sound distortion. .However, because of daily life, we hear the sound basically sent from one point, while the frequency emitted by the speaker of the frequency of each unit isdifferent from the physical location of installation are different. .In this way, there will be sound in devices. .In addition, the high frequency of the bass unit is responsible for the different though, but it is bound to the existence of a critical point, so in a different position, given the same frequency, will produce acoustic interference. .<BR> <BR> To resolve these difficulties, it is necessary with the role of divider. .Divider the name suggests, is to separate the different frequencies, and sent to a different speaker unit. .Of course, it features not only this, it is also based on the characteristics of the speaker adjusted to reduce distortion and interference. .<BR> <BR> Glossary <BR> <BR> Nominal Impedance: Speakers at a specific frequency when measured at the input impedance, which is the speaker audio system with other parts of the important parameters match. .If the data and power amplifier with a nominal impedance, there will be voice distortion. .<BR> <BR> Sensitivity (SPL): When a speaker with 1W power of the noise signal, in the axial sound pressure level measured at 1m, which is the ability to reflect the size of the speaker sound performance indicators. .In the optional speakers, to the left and right as far as possible consistent with the values (within ± 1dB control), or there will be very clear sense of focus. .<BR> <BR> Quite that each find a new car audio dealer to get new information. .Did not think, different stores among the recommended products, there is so much the same thing. .Such as the host inside the Alpine and Sony, and the speaker of the MB. .Two stores are located in Beijing's north and south ends, and their manager recommended the same brand, it seems that a certain share of the market or weight. .The price difference between the different stores is still very large. .The owners are audio conversion might need a few more to see, learn about market conditions, while in the modified "local pay back the money" ready. .<BR> <BR>.