[. . . ] *2: Half-space (2π) *3: Calculated based on power rating and sensitivity, exclusive of power compression. Specifications and descriptions in this owner's manual are for information purposes only. reserves the right to change or modify products or specifications at any time without prior notice. [. . . ] • Do not place the device in a location where it may come into contact with corrosive gases or salt air. • Construction work should be carried out in accordance with constructionrelated law and always by a professional constructor. If the device installation requires construction work, make sure to observe the following precautions. - Choose mounting hardware and an installation location that can support the weight of the device. - Inspect the device periodically. Connections • Before connecting the device to a power amplifier, turn off the power for all devices. Before turning the power on or off for all devices, set all volume levels to minimum. • Use only speaker cables for connecting speakers to the speaker jacks. Use of other types of cables may result in fire. Maintenance • Do not wipe the outer packaging with benzine, thinner, or synthetic detergent and do not use electrical contact cleaner. These may damage the outer packaging and dissolve the parts. ● About This Manual The illustrations as shown in this manual are for instructional purposes only, and may appear somewhat different from those on your device. Yamaha cannot be held responsible for damage caused by improper use or modifications to the device. INSTALLING THE SPEAKERS Install the speakers onto the ceiling with the supplied hardware. Pre-installation (Preparation of the Cable) Use stranded wire for cables attached to the Euroblock connector. Strip their insulation as shown in the figure and connect them. About 7 mm (0. 3 in. ) There are two acceptable wiring methods. CAUTION When connecting with low impedance, take note of the combined resistance. Using Loop-Through Terminals For this method, cables are connected from terminals 1 and 4 to the subsequent speaker. [. . . ] 2 Push up the speaker slowly into the ceiling, taking care not to trap the cable. CAUTION • Do not over-tighten the attachment screw. • Do not turn any screws other than attachment screw (located beside the U mark). Otherwise, the speaker may fall or malfunction. Tile rail 5 SET THE LINE VOLTAGE/IMPEDANCE AND POWER Select the line voltage/impedance (100V/70V/8Ω) and power tap for 100V/ 70V line distributed system, by rotating the tap selector switch on the front side of the speaker with a flat-blade screwdriver. 3 CONNECT THE WIRING TO THE CONNECTOR AND FIX THE CABLE 1 Pull the wiring from the amplifier through the cut hole. [. . . ]