User manual ELECTRO-VOICE 72

[. . . ] Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. Only use attachments/accessories specified by the manufacturer. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. [. . . ] Replacing special components that are marked in the circuit diagram using the security symbol (Note) is only permissible when using original parts. 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. Secure cables with wire ties or tape whenever possible. · 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. If the system is receiving signal, the LED will illuminate green. ELECTRO-VOICE® Plasma Owners Manual 4 P1 and P2 Amplifiers Input Electronically balanced inputs for the connection of high-level signal sources such as mixers, signal processors, etc. Establishing the connection is possible via phone or XLR-type jacks. Balanced connection is recommended to prevent noise or HF-interference. Caution: Before connecting or disconnecting any plugs, make sure to set the level control to its counterclockwise stop, which prevents the system, the audience and yourself from being stressed by nasty contact noise. Outputs Output is full bandwidth pass through. 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). If knob is not used, please remember where you store it. 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. [. . . ] It should not be in the path of very hot air. Power Switch AC switch for switching the Plasma's power ON or OFF. The switch lights after turning the power ON. Make sure that the AC cord is correctly connected if the switch is not lit upon turning the power on. [. . . ]