User manual YAMAHA CM12V

[. . . ] These precautions include, but are not limited to, the following: Do not open · Do not open the device or attempt to disassemble the internal parts or modify them in any way. The device contains no user-serviceable parts. If it should appear to be malfunctioning, discontinue use immediately and have it inspected by qualified Yamaha service personnel. Water warning · Do not expose the device to rain, use it near water or in damp or wet conditions, or place containers on it containing liquids which might spill into any openings. CAUTION Always follow the basic precautions listed below to avoid the possibility of physical injury to you or others, or damage to the device or other property. These precautions include, but are not limited to, the following: Location · If you use a stand, check the stand's specifications and make sure that it is sturdy enough to support the weight of the speaker. [. . . ] Reapply power and check the performance of the high-frequency driver before continuing with the power reduced to a level that does not cause the poly switch to interrupt the signal. On the CW115V/CW118V/CW218V subwoofer, the Poly Switch protects the woofer and a similar routine should be followed if its output is lost. · In any system using two or more speakers, be sure to match the connection polarities of all speakers to the amplifier(s) ­ e. g. always connect "+" to "+" and "-" to "-". If the polarities are not properly matched the speakers will be driven out of phase and the sound will suffer. · Use only Neutrik NL4FC plugs for connecting Speakon connectors. Yamaha cannot be held responsible for damage caused by improper use or modifications to the device. * 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. To protect your speakers When choosing a power amplifier to use with your speakers, make sure that its power output matches the speakers' power capacity (refer to the Specifications on page 7). 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 distorted signals. · Popping noises caused by turning on equipment, or by connecting or disconnecting system components while the amplifier is turned on. 3 ENGLISH Poly Switch Connecting the Speakers I Phone Plug Wiring Phone plugs for connection to the phone jack inputs should be wired as shown to the right. Be sure to use proper speaker cable -- NOT shielded instrument or line cable -- for all speaker connections. HOT(+) COLD(­) I Neutrik Speakon 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 speaker connections. 2­ (NO USE) 1+ : HOT(+) 1­ :COLD (­) Neutrik NL4FC connector 2+ (NO USE) I Full-range Connection Each speaker (except for the C112VA/ C115VA) features four input/parallel connectors--two 1/4" phone jacks and two Neutrik Speakon NL4MP connectors. Use either a phone jack or a Speakon connector to receive input from your sound system/power amplifier. One of the spare connectors can be used to parallel-connect an additional speaker (keeping in mind the impedance considerations mentioned below). MIXING CONSOLE L GRAPHIC EQUALIZER L POWER AMPLIFIER L SPEAKER SYSTEMS R R R SPEAKER SYSTEMS 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 parallel-connected 8-ohm speakers have a total impedance of 4 ohms. Two 8-ohm speakers can safely be paralleled on one output. 4-ohm speakers, however, should not be parallel-connected with other speakers. [. . . ] 17, 200, 28230 Las Rozas (Madrid), Spain Tel: 91-639-8888 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. Sucursal de Argentina Viamonte 1145 Piso2-B 1053, Buenos Aires, Argentina Tel: 1-4371-7021 SWEDEN Yamaha Scandinavia AB J. Wettergrens Gata 1, Box 30053 S-400 43 Göteborg, Sweden Tel: 031 89 34 00 TAIWAN Yamaha KHS Music Co. , Ltd. [. . . ]