The installment key point is the layout, because the transmitting range is far, to guarantee that the signal does not have the too big weaken on the line. The main skeleton line uses 2X2.5mm2 many lines of balance, the branch uses 2X1mm2 many lines of balance. In order to meet the fire requirements, the nema uses the being flame-resistant trunking or the being flame-resistant nema. Each wiring point and the branching point suppose the branch box. In order to be advantageous for the trouble shooting, after pulling the line, then uses the avonmeter to survey. The line terminal pipe nipple, surveys first with the avonmeter in the beginning end. If leads the way proved that the line has the abruption question. If resistance close zero, the terminal opening, the resistance should be again the infinitely great. Otherwise, if the resistance is not the infinitely great proved that between two lines has the short circuit question. Moreover, but also whether there is can survey between a winding and the nema to short-circuit the leakage phenomenon. Each attire section of lines must inspect immediately, then according to the design drawing bring home, inspects each area to the fire center impedance and so on to design whether to have discrepancies. Finally joins the power amplifier, the audition each area sound to be whether normal. Because each area loudspeaker locates the position is different, covers the region size also to have the difference, to enable the sound field to achieve the predetermined uniformity, may adjust the loudspeaker (space transformer) on 0~70V or the 0~100V input each files position. For example: The far loudspeaker available space transformer 0~70V files, near loudspeaker with the 0~100V files mouth, regards the special details to decide.

Broadcast power amplifier use wire cross sectional area table