CAUTION: Do not mount on surfaces that are not sturdy enough, or that have hazards concealed behind them, such as electrical wire or plumbing. If you are unsure about installing the bracket, contact a qualified professional installer. Note: See your speaker owner's guide for proper speaker placement and wiring instructions. LET OPI Niet bevestigen aan oppervlakken die niet stevig genoeg zijn of waarachter misschien kwetsbare leidingen (water/elektriciteit) lopen.