User manual ELECTRO-VOICE 72

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Manual abstract: user guide ELECTRO-VOICE 72

Detailed instructions for use are in the User's Guide.

[. . . ] Any work security regulations that are applicable at the location where the appliance is being serviced have to be strictly obeyed. All instructions concerning the handling of MOS - circuits have to be observed. Note: 1 SAFETY COMPONENT (HAS TO BE REPLACED WITH ORIGINAL PART ONLY) ELECTRO-VOICE® Plasma Owners Manual Table of Contents Important Safety/Service Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Plasma Series Owner's Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety First . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] These systems are the culmination of EV's 75 years of experience in transducer design and over 50 years of experience in designing and building electronics. Please take time to consult this manual so that you can understand all the features built into your EV systems and fully utilize all their performance capabilities. ELECTRO-VOICE® Plasma Owners Manual 2 Safety First When setting up, installing and using Electro-Voice® Plasma speaker systems, there are a number of precautions that you should follow: · When Electro-Voice® Plasma speakers are used for portable applications in which they will be stacked directly on the floor, make sure that the floor or stage is solid and secure. Make sure to: · Route cables and position the stand so that performers, production crew and audience members will not trip over the stand or cables and pull the speaker system over. · If you intend to hang or fly the Plasma two-way systems, only do so safely with the correct hardware and accessories. WARNING: Suspending any object is potentially dangerous and should only be attempted by individuals who have a thorough knowledge of the techniques and regulations of rigging objects overhead. Electro-Voice® strongly recommends that Plasma speakers be suspended taking into account all current national, federal, state and local regulations. It is the responsibility of the installer to ensure that Plasma speakers are safely installed in accordance with all such regulations. If Plasma speakers are suspended, Electro-Voice® strongly recommends that the system be inspected at least once a year. If any sign of weakness or damage is detected, remedial action should be taken immediately. There are data sheets for each EV hanging hardware part that should also be consulted prior to suspending speakers. · Electro-Voice® does not recommend use of Plasma speakers outdoors without protection from rain or in high moisture environments. · Electro-Voice® Plasma loudspeakers are easily capable of generating sound pressure levels sufficient to cause permanent hearing damage to anyone within normal coverage distance. Caution should be taken to avoid prolonged exposure to sound pressure levels exceeding 90 dB. 3 ELECTRO-VOICE® Plasma Owners Manual Description Electro-Voice® Plasma high powered loudspeakers are fully integrated audio systems with carefully matched electronics and transducers. Crossover Mode Switch Selects between 40 Hz highpass filter for Fullrange use, and 100 Hz highpass filter for use with Plasma P2 subwoofer. It is not recommended that you use your P1 in Fullrange with subwoofers. Level This control sets the output volume of the P1 or P2 in a range between -dB and +6dB. The internal power amplifier provides a nominal input sensitivity of +6dBu. Level adjustment knob shown in place. Unit is shipped preset at 0 dB without knob installed (knob is shipped separately with your Plasma Speaker). Customer can adjust level by removing cover, pressing knob in place, and rotating to desired level. 5 ELECTRO-VOICE® Plasma Owners Manual Status Indicators These indicators provide information about the actual operational state of the Plasma's internal power amplifier. Signal Indicates that an audio signal is present at the input and that it is output. Limit When lit this indicator signals that the internal power amplifier actually operated at the threshold of clipping. Short-term blinking is not critical, because the amp's audio limiter keeps distortion under control, so that the sound is unaffected. Input overdrive, which results in sound degradation, is a probable cause for a continuously lit indicator. Protection There are two leds to indicate Speaker Protection, or Amplifier Protection. [. . . ] Plasma P1 enclosures have been pull tested and exceed a safety factor of 10 to 1. Working Load Limit Rating of Plasma P1 Powered Speaker System Figure 5: Prior to each use, inspect the grid assembly or suspension point(s) and associated hardware for any cracks, deformations, broken welds, corrosion, missing or damaged components which could reduce the grid assembly or suspension point(s) strength. Never exceed the limitations or maximum recommended load intended for grid assembly design or suspension point(s). As an added safety measure, it is suggested that the user install a second suspension point back to the grid (or building structural supports). This redundant safety point should have as little slack as possible (less than one inch is preferable). [. . . ]

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