User manual YAMAHA A10 A12 A15 A12M A15W

[. . . ] - Add weight such as sand bags around the stand legs to prevent them from falling over. - Remove the speakers from the stands before moving the stands or adjusting their height. - Limit the number of people around the placed stand. · When transporting or moving the device, always use two or more people. [. . . ] Even if the amplifier's power output is lower than the speakers' PGM (program) power capacity, the speakers may be damaged when clipping of a high input signal occurs. The following may cause damage to speakers: Feedback caused when using a microphone. Continuous high sound pressure level produced by electronic instruments. Continuous high-power output of distorted signals. Popping noises caused by turning on equipment, or by connecting or disconnecting system components while the amplifier is turned on. * Illustrations in this manual are for explanatory purposes only, and may not match the actual appearance of the product during operation. * Company names and product names used in this Owner's Manual are trademarks or registered trademarks of their respective owners. · When turning on the AC power in your audio system, always turn on the power amplifier LAST, to avoid speaker damage. When turning the power off, the power amplifier should be turned off FIRST for the same reason. · Do not operate this device at high volume levels or at a level that is uncomfortable, since it is capable of producing sound levels that could cause permanent hearing loss. If you experience any discomfort or ringing in the ears, or suspect an hearing loss, you should consult an audiologist. Yamaha cannot be held responsible for damage caused by improper use or modifications to the device. Before Making Connections Phone Plug Wiring Phone plugs for connection to the phone jack inputs should be wired as shown on the right. Be sure to use proper speaker cable -- NOT shielded instrument or line cable -- for all speaker connections. Neutrik NL4FC Plug Wiring If you will be using the Neutrik connectors for speaker input, wire the plugs as shown to the right. Be sure to use proper speaker cable -- NOT shielded instrument or line cable -- for all 1+ : HOT (+) speaker connections. 1­ : COLD (­) Neutrik NL4FC connector 2­ (NO USE) 2+ (NO USE) 3 ENGLISH Connections Special Notice Subwoofer Parallel-connection The subwoofer A15W features four input/parallel connectors--two 1/4" phone jacks and two Neutrik NL4MP connectors. Use either a phone jack or a Neutrik connector to receive input from your sound system/power amplifier. One of the spare connectors can be used to parallel-connect an additional main speaker (keeping in mind the impedance considerations mentioned below). Impedance Considerations When connecting speakers in parallel be sure to check the rated load impedance of the power amplifier. Most power amplifiers are capable of safely driving speakers with minimum impedance of 8 ohms or 4 ohms. A pair of parallelconnected 8-ohm speakers have a total impedance of 4 ohms. Two 8-ohm speakers can safely be paralleled on one output. [. . . ] Brasil Tel: 011-3085-1377 SWEDEN Yamaha Scandinavia AB J. Wettergrens Gata 1 Box 30053 S-400 43 Göteborg, Sweden Tel: 031 89 34 00 SINGAPORE Yamaha Music Asia Pte. , Ltd. #03-11 A-Z Building 140 Paya Lebor Road, Singapore 409015 Tel: 747-4374 ARGENTINA Yamaha Music Latin America, S. A. [. . . ]