User manual YAMAHA VS4

[. . . ] If it should appear to be malfunctioning, discontinue use immediately and have it inspected by qualified Yamaha service personnel. Do not put burning items, such as candles, on the unit. [. . . ] Malfunction or fire may occur especially when the following sounds or noises are generated: - feedback, when using a microphone - continuous and extreme volume sound from a musical instrument - extreme continuous distorted sound - noise caused by plugging/unplugging the cable while the amplifier is turned on Yamaha cannot be held responsible for damage caused by improper use or modifications to the device. Unpack the contents and confirm that all the following items are included Speaker × 2, Bracket × 2, Retaining knob × 4, Terminal cover × 2, Terminal cover screw × 4. Using the bracket as a template, mark the locations (four points for M5 and two points for M10) of the key hole slots on the mounting area. Use the appropriate screws (M5 or M10) for the mounting surface to fix the bracket to the wall/ceiling. The central hole in the bracket can be used to thread the speaker cables, as required. # Position the speaker in the bracket and secure it using two retaining knobs. If the bracket is used for wall/ceiling mounting, use of a safety wire (not included) is advised to prevent the speaker from falling. Secure each safety wire through the bore for the safety wire in each bracket. refer to DIMENSIONS in SPECIFICATIONS for the location of this bore. The safety wire should be the minimum length necessary. The speakers are designed to be waterproof against water impact up to 60° on either side from vertical (IPX3). The speaker can be installed under outdoor eaves away from direct contact with rain. [. . . ] % Attach the terminal cover using terminal cover screws. & Set the desired speaker angle by loosening the two retaining knobs, and secure it in place by tightening the two retaining knobs. [. . . ]