Xue Tielong C5 is car of class of B of faculty of a law the sales volume in home recently is not very good, his sound system performance also is very common, the sound insulation plus door plank is not very good, caused pair of sound effect most seeking tall person cannot be satisfied, so car advocate final decision upgrades horn of the Le Ge that it is demon. Horn of demon happy song adds processor a photograph of whole familyBoard sound insulation measureStop shake board and sound-absorbing cotton has sufficient sound insulation to door plankThe sackbut in R6D of Danish demon happy song is installed at door plank formerAfter sound insulation of back door board, american DB6.5 horn of very little coaxial undertakes former an installationHorn of American DB6.5 very little coaxialDSP of Danish demon happy songTuner begins to have final key