Car Speaker Size

Measurement speakers ( speakers, jargon " unit " ) to calculate the size of the effective vibration radius. Ie not pressed into the outer edge of the cone fixed apron diameter count , it is customary for the speaker diameter in inches .
Most people use mostly Car Speaker metric ruler , measure how many centimeters the cone diameter , divided by 2.54 ( 2.54 centimeters equals one inch ) , is an inch.
4 -inch speaker : the screw holes on the angular distance is 11.5 cm , adjacent pitch 8 cm , horn diameter is 10 cm ;
5-inch speaker : the screw holes on the angular distance is 13.5 cm , adjacent pitch 9.5 cm , diameter 13 cm ;
6.5 -inch speaker : the screw holes on the angular distance is 15.5 cm , adjacent pitch 11 cm , diameter 16.5 cm ;
4X6 inch screw holes adjacent bookshelf speaker distance is 12.3 cm and 7.3 cm ;
6X9 inch screw holes adjacent distance is 16.5 cm , respectively, and 11 cm .

In the traffic laws, the use of the car horn, made ​​such Speaker

1, motor vehicle approaching sharp bends, etc. affect the safety of the top of the ramp sections and overtaking sight or the event of an emergency, should slow down and honk to indicate.
2, the front of the vehicle in case the vehicle is parked or driving slowly while waiting in line, waiting or turn driving bookshelf speaker not enter non-motor vehicle lanes, sidewalks driving, urging shall honking vehicles and pedestrians.
In other words, the role of car horns, is a special section of the advance warning, the warning of some emergency Multimedia Speaker, in order to ensure traffic safety.

Car Speaker Response

It determines the maximum sound speakers that can emit a strong feeling of sound macro is the biggest shocking . The indicators in terms of multimedia speakers , in fact, the significance is not great unless the room is a great need to have enough sound pressure to meet the bookshelf speaker of the listener . International speaker on the power of performance indicators marked in two ways: Rated power ( long-term power ) and Maximum Power ( PMPO instantaneous power or musical power MPO). The former refers to the speaker within the rated frequency range provides a continuous analog signal waveform at a certain interval and repeat a certain number of times, without any damage to the speaker maximum electric power ; latter refers to the speaker can withstand short-term maximum power . Typically businesses in order to meet and consumer psychology , there are often large music power marked tendency , so we should buy multimedia speakers rated power prevail. Speaker's power amplifier chip is mainly determined by its power , in addition to the power supply bookshelf computer speaker related. Although the speaker's power is better, but enough is enough for the average home user 20 sq. m around the room speaking , 30W speaker , or a combination of 2.1,4.1 about 40W subwoofer is already more than enough , and then high-power speakers only help you waste money that quot;? merit " in the power side陎, Hongxi speakers already for you to make the best choice , so if you are fond of the words of the speaker of the Chang Foundation , the power can be ! no longer consider the frequency response of the frequency range : the former refers to the playback frequency range of the speaker and the lowest effective playback frequency among the most significant , in Hertz (Hz); the latter refers to a constant voltage output of the audio signal and the speaker when connected to the system , the sound pressure generated by the speaker changes with increasing frequency or attenuation occurs , the phase change with frequency of the phenomenon , the relationship between changes in sound pressure frequency and phase associated with the known frequency response units decibels (dB). sound pressure and phase lag versus frequency curves are called " amplitude-frequency characteristics " and " phase-frequency characteristics " , collectively, the " frequency characteristics ." this is to investigate the merits of the speaker is an important performance indicator , it and speaker performance and price has a direct relationship , its decibel value smaller the speaker frequency response curve more fair Tanzania , distortion smaller, higher performance , such as : a speaker 's frequency response is 60Hz-18kHz +-3dB for the present the middle and low speaker, mostly because of poor sound quality ( distortion serious ) or the manufacturer's technical staff of the concept of frequency response and the frequency range of the speaker leads to no clear labeling . usually marked frequency response in see quot;? system frequency response "and" amplifier frequency response " to know " the system frequency response " is always better than " amplifier frequency response "small range , so only marked" amplifier frequency response " has no meaning , which Some just to deceive unsuspecting consumers. Speaker manufacturers now generally marked on the system frequency response range is too large , high-frequency part of the difference is not a lot , but in the low end is too outrageous : three hundred dollars dare wooden speaker frequency response of the low-frequency standard to fifty or sixty Hz or even lower , to know foreign brand high-end speakers ( worth thousands of dollars ) only in the vicinity of the low-frequency Frequency standard fifty or sixty hertz , so we advise bass ears must be true , do not easily believe propaganda value on the list . Another point to note is : now there is a wrong tendency to buy multimedia speakers , the lower frequency limit value is too low frequency part . To know

Car amplifier bass

Due to space limitations, car bookshelf speaker bass placed to achieve stability and good heat dissipation, the best choice is, of course, the car trunk. This inevitably brings two problems, one is how to reduce the volume of equipment to the trunk occupation and the function, the second is how to in as little as possible to destroy the car interior conditions to minimize the audio signal transmission line loss. Car stereo effect is inevitably affected by the engine sound, external airflow noise interference, these effects mainly focused on the bass drum and bass, so the car install bass speaker is particularly necessary. Just a mount and inferior bass, feel better than before, but listen to a period of time will feel, bass vague, bosom frowsty, mind after listening to get confused. This is because under the Multimedia Speakers of distortion into noise, the noise can damage the brain damage the body. Advice for sound of friends here, and don't covet is cheap sell junk, modified again found problems in the future, will abolish many equipment, spend more than necessary. Do not think that running must be expensive, both lobster and Fried potatoes. But the taste is worth tasting, here are even cheap packages, equipment quality guaranteed, and can enjoy the first-class installation technology and good after-sales service, will have the feeling of the value.

The working principle of the car horn

Auto electric horn is to rely on the Multimedia Speaker of the metal diaphragm to sound. Automobile electric horn by core, magnetic coil, contact, armature, diaphragm, etc. When the driver presses the horn switch, electricity flows through the contact through the coil, a coil magnetic suction under the armature, mandatory move diaphragm, armature move off contact, interrupt current, coil magnetic disappeared, diaphragm armature on bookshelf speaker own flexibility and spring leaf restored with in situ, contact closure reclosing circuit, current pass through magnetic coil, contact the repeat the action. So circular diaphragm vibration unceasingly, thus two sound. Soundboard and diaphragm rigid connection, can make the vibration smooth sounds more pleasing to the ear (namely electromagnet principle).

Sound playback of normal voice signal strength and the ratio of intensity of noise signal

Refers to the normal sound playback voice signal strength and the ratio of intensity of noise signal. Low signal-to-noise ratio, small signal when the input noise is serious, in the whole range of voice grew noticeably muddiness, blare blare du not hair what sound, very affect the sound quality. Signal-to-noise ratio is less than 80 db speakers, less than 70 db bookshelf speaker doesn't suggest to buy! Sensitivity (dB) : this refers to produce full power output when the input signal, the lower the input signal, the higher the sensitivity. Poor speakers, the sensitivity of each 3 dB, the output sound pressure differs twice, with 87 dB sensitivity, commonly below 84 dB for low sensitivity, above 90 dB for high sensitivity. And the improvement of sensitivity at the expense of the distortion degree increase, so as a high-fidelity speakers, to ensure the reduction degree and representation of timbre capacity will have to reduce some claim to the sensitivity. Sensitivity is an indicator of speakers, but it has nothing to do with the speaker sound quality tone. "Active speaker" of the "active" active speakers is a signal processing circuit, control circuit and power amplifier speakers. Active speaker can directly with the general audio source (such as the bookshelf computer speaker, CD, VCD, VCR, computer sound card, etc.) are tie-in, form a complete set of sound system. With active speakers, there is no need to purchase another power amplifier, also do not have to worry for power amplifier, speakers of reasonable collocation. Active speaker has a very high cost performance, due to the active speakers built-in amplifier circuit, make the attachment much shorter than the outer power amplifier, is much more simple, small 巵 talk, background noise. Active speaker with built-in amplifier, can greatly save household space. Active speakers, simple operation, only some necessary switches and adjusting knob on the box body, remove the other power amplifier on practical operation knob, not can only simple to open the power switch can be. Special SOUND technology hardware 3 d SOUND technology is now mostly use of SRS, APX, Spatializer 3 d, Q - SOUND, Virtaul Dolby * and Ymersion several, although their application theory is different, but they can make a person feel obvious three-dimensional acoustic field effect, the first three are more common. And there are two kinds of audio enhancement technique: active mechanical and electrical servo technology and own empowerment, high-definition plateau sound playback system, to improve the sound quality also to have certain improvement effect.

Desktop audio speakers

Although the desktop is the stereo, but some desktop audio speakers parts can be installed separately. So how to speakers when fission installation layout? You might say, a total of two speakers, more particular about what layout? And, of course, if your speakers on the corner or your speakers on the middle side of the room, to the sound is very different. bookshelf speaker small desktop audio two speakers we suggest you where the nearest to the listening position, position an axis of symmetry in the room. Two speakers distance not too far, or otherwise the two speakers of power of the desktop audio, it is hard to Wooden Computer Speaker to generate a sound field. Due to not professional listening room with sound-absorbing structure, so it's best to reduce the noise in the room, according to the number of bounces back and forth to prevent because too much cause reflection noise increases, also avoid two channel reflection about the sound field in different path imbalance. Of course, every can fission desktop sound at the beginning of the purchase will be equipped with a sound box line. Sound box line is long, don't cry because it is afraid of trouble in the process of installation and shorter without authorization, otherwise this and two speakers placed a far a nearly no difference. If you sound box line is not long enough, or because of other reasons to buy separate, so suggest you buy high quality high fidelity sound box line, because such small sound box line resistance loss higher sound quality, some sound box line also has the ability of anti-jamming. Also have to wait long lines, of course, when buying.

Often keep the horn looks clean, all wiring more secure

Often keep the horn looks clean, all wiring more secure

(2) check and tighten the horn and bracket set screw, ensure the reliable iron.

(3) fixed method of horn on its influence on bookshelf speaker. In order to make the speaker's voice is normal, the speaker can't be installed rigidity, and fixed on the bracket of buffer, namely between the horn and fixed bracket to a plate spring or rubber pad.

(4) check the generator output voltage. High voltage will burn out the horn contacts, low voltage (rated voltage below the horn) speakers will be abnormal sound.

(5) wash the car, not directly with Wooden Computer Speaker flushing megaphone, so as to avoid water into a megaphone and make the horn.

(6) the horn in overhaul, should pay attention to the position of each metal gasket and insulation pads, thou shalt not put any fault.

Continuous pronunciation (7) the speaker shall not exceed 10 s, so as not to damage the speaker.

(8) may not be all kinds of foreign bodies into the horn, lest cause abnormal sound