User manual YAMAHA PSS790

[. . . ] MAKE SURE THE POWER IS OFF BEFORE MAKING OR REMOVING CONNECTIONS Always turn the power switches of system components OFF prior to connecting or disconnecting cables. Failure to do so may result in damage to speakers as well as to connected equipment. HOW TO POWER UP YOUR SOUND SYSTEM To avoid damage to your speakers and other parts of your system, when you turn on your system, ALWAYS turn the power amp on last!This will avoid loud, damaging pops that will annoy your audience, and blow your speakers. [. . . ] This will avoid loud, damaging pops that will annoy your audience, and blow your speakers. When you power down, the amplifier should ALWAYS be turned off first to avoid the same problems. MATCH CONNECTOR POLARITY When using two or more speaker systems, be sure match the polarity (+/­) of the speaker system connectors to those at the amplifier. If the polarities do not match, the sounds produced by the speakers will interfere with each other, making it impossible to achieve a well-balanced sound field. KEEP THIS OWNER'S MANUAL IN A SAFE PLACE FOR FUTURE REFERENCE 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 6). 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. · Popping noises caused by turning on equipment, or by connecting or disconnecting system components while the amplifier is turned on. Poly Switch All full-range loudspeakers are fitted with a self-resetting poly switch that protects the high-frequency driver from damage caused by excessive power. They are not designed for suspension or hanging. ­3­ Connecting the Speakers CONNECTION EXAMPLE 1 The illustration below shows audio connections for a standard setup using two speaker systems. DAISY-CHAINED MIXING CONSOLE L GRAPHIC EQUALIZER L POWER AMPLIFIER L SPEAKER SYSTEMS R R R SPEAKER SYSTEMS Daisy-Chaining Speakers Since the speaker systems in this series are equipped with two input terminals that are internally connected in parallel, it is possible "daisy-chain" speakers by connecting the output from the power amplifier to one Neutrik connector, and a second speaker system to the other. Two parallel-connected 8 speakers have a total impedance of 4 , which is the minimum that should be connected to one amplifier output channel. The S112IVN, S115IVN, SM10IVN, SM12IVN, SM15IVN and SW118IVN are 8 speakers, and two of these can safely be paralleled on one output. The S215IVN and SW215IVN, however, have an impedance of 4 and should not be parallel-connected with another S215IVN / SW215IVN or any other model. Neutrik NL4FC Plug Wiring If you will be using the Neutrik connectors for speaker input, wire the plugs as shown below. 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) Caution: Use only unshielded speaker cable with stranded conductors to connect speakers to the speaker terminals on a power amplifier. The use of audio cable not rated as sufficient for the amplifier's maximum output level can create a potential fire hazard. ­4­ CONNECTION EXAMPLE 2 This example shows audio connections for a system using SW118IVN or SW215IVN Subwoofers and a PSS790 Crossover Network. TWO-CHANNEL POWER AMPLIFIER PSS790 L LEFT MIXING CONSOLE L TWO-CHANNEL GRAPHIC EQUALIZER L LEFT INPUTS RIGHT R R L LEFT LOW RIGHT R R INPUT OUTPUT L TO POWER AMP INPUTS HIGH RIGHT R R INPUT OUTPUT L SPEAKER SYSTEM SW118IVN or SW215IVN SPEAKER SYSTEM TWO-CHANNEL POWER AMPLIFIER SW118IVN or SW215IVN · Do not connect the PSS790 between the power amplifiers and the SW118IVN, SW215IVN subwoofers, as doing so will damage the equipment. · Although the PSS790 has a standard load impedance of 15 k , it can be used with loads between 7. 5 and 30 k , allowing use with most power amplifiers. [. . . ] 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) Caution: Use only unshielded speaker cable with stranded conductors to connect speakers to the speaker terminals on a power amplifier. The use of audio cable not rated as sufficient for the amplifier's maximum output level can create a potential fire hazard. ­4­ CONNECTION EXAMPLE 2 This example shows audio connections for a system using SW118IVN or SW215IVN Subwoofers and a PSS790 Crossover Network. TWO-CHANNEL POWER AMPLIFIER PSS790 L LEFT MIXING CONSOLE L TWO-CHANNEL GRAPHIC EQUALIZER L LEFT INPUTS RIGHT R R L LEFT LOW RIGHT R R INPUT OUTPUT L TO POWER AMP INPUTS HIGH RIGHT R R INPUT OUTPUT L SPEAKER SYSTEM SW118IVN or SW215IVN SPEAKER SYSTEM TWO-CHANNEL POWER AMPLIFIER SW118IVN or SW215IVN · Do not connect the PSS790 between the power amplifiers and the SW118IVN, SW215IVN subwoofers, as doing so will damage the equipment. · Although the PSS790 has a standard load impedance of 15 k , it can be used with loads between 7. 5 and 30 k , allowing use with most power amplifiers. [. . . ]