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1、濟(jì)南汽車音響改裝http://www.szanyuda.com/介紹安裝揚(yáng)聲器的支架、底板（車門）剛性不夠，當(dāng)汽車上的揚(yáng)聲器發(fā)聲時，由于喇叭的聲波不但會向前輸送，而且同時也向后傳輸，當(dāng)向后傳輸?shù)穆暡�沖擊底板時底板就會隨揚(yáng)聲器產(chǎn)生共振或抖顫，導(dǎo)致?lián)P聲器的聲壓受到損失，并引起揚(yáng)聲器的諧波失真，從而導(dǎo)致音質(zhì)惡化。
Jinan car audio conversion describes how to install the speaker bracket plate (doors) rigid enough, when the car sound speaker, not only due to the sonic horn fed forward, but also backward transmission, when the transmission of sound

waves back impact plate when the floor will resonate with the speakers or tremors, leading to a loss of sound pressure of the speaker, and the speaker of the harmonic distortion caused by, resulting in deterioration of sound quality.
    
2、濟(jì)南汽車音響改裝http://www.szanyuda.com/談到安裝揚(yáng)聲器的箱體（車門）密封性不夠，中低音喇叭向前與向后兩個方向的聲波相位相差了180度。由于低頻聲波的波長較長，其繞射能力強(qiáng)，使得低頻聲波的方向性很弱，由于車門喇叭安裝面板上面充滿了孔洞，向后輻射的聲波就會繞到前面與前面的聲波相互抵消，則會使向前傳輸?shù)穆暡ㄝ椛淠芰勘淮蟠笙魅?即聲短路)。
Jinan modified car stereo speakers talked about the installation of the box (door) tightness is not enough, the subwoofer forward and backward wave phase difference between the two directions of 180 degrees. Since the low-frequency sound of longer wavelength, its diffraction ability, so that low-frequency sound directivity is weak, due to the speaker mounting panel above the door full of holes, acoustic radiation will be back around to the front and the front sound waves cancel each other out, sonic will make the onward transmission of radiant energy is greatly reduced (ie sound short).