FREQ. RESPONSE (dB SPL、1W、1m)
1. Cut an installation hole in the diameter of 248 ± 3mm on the ceiling (see the figure above);
2. Connect the audio broadcast transmission line;
3. Remove the grille, and put the speaker into the ceiling hole cut. Screw tight the speaker as shown in below figure, and put on the grille;
4. Finally, check whether the speaker is installed in a firm and reliable way.
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