User manual ELECTRO-VOICE 731 DATASHEET

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ELECTRO-VOICE 731 DATASHEET: Download the complete user guide (746 Ko)

Manual abstract: user guide ELECTRO-VOICE 731DATASHEET

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

[. . . ] All instructions concerning the handling of MOS - circuits have to be observed. Note: SAFETY COMPONENT (HAS TO BE REPLACED WITH ORIGINAL PART ONLY) INTRODUCTION CONTENTS Introduction . 9 10 11 13 20 21 24 731 Meeting the highest requirements of modern audio applications - especially, when it comes to sound pressure level, coverage and sound quality - is only possible when using active multi-component loudspeaker systems which provide the possibility to separately amplify and reproduce the audio signal's individual frequency ranges. Active 2-way installations with additional sub woofer systems probably offer the best price-performance ratio. The low frequency range of the audio signal is reproduced by the sub woofers while high-quality full-range cabinets take care of the Mid/Hi frequencies and vocals. [. . . ] Installing and operating the 731 Controllers is easy as can be since the user does not need to know any complex detail about crossover functions and equalization. All controls for matching the sound to different acoustic conditions and loudspeaker systems are located on the front panel. Difficult tasks - like electronic signal routing and settings for instance - are automatically carried out inside the appliance. The newly designed PowerMax12 crossover function (patents pending) optimally utilizes amplifier output power and loudspeaker transmission capacities. Compared to conventional crossovers or controllers, this results in an improved overall sound quality which is achieved with less effort. The 731 Controller is also most suitable for integration in active 2-way instrument reinforcement applications for keyboards, E-bass and drums. The PowerMax12 crossover function eliminates the often complained about "lack-of-punch-and-definition", like it is common for conventional active musical instrument reinforcement systems. Its excellent dynamic range of more than 116dB, the extremely low noise level and the outstanding price-performance ratio makes the 731 Controller an advantageous alternative to conventional crossover and controller solutions ­ even in the critical field of permanent installation. FRONT PANEL 1. Input "A" and "B" level controls These controls are normally set to their "0"-marked (detent) center position. If needed or desired, the controls can be used to individually adjust the input levels of the channels "A" and "B". The green "Signal" LEDs indicate that audio signals are present at the inputs. The "Mute" switch attenuates the Sub Out Mono audio signal, which allows to easily check the entire sound reinforcement system. The green "Signal" LED indicates the presence of an audio signal while the red "Peak" LED lights when the audio signal is clipped inside the 731 which might result in distortion. In case the "Peak" LED lights continuously, lowering the input "A" and input "B" level controls is recommended to maintain the entire dynamic range. 8. Lo Out Stereo The control is normally set to its center (0dB) position. This control is used to adjust the loudness level of the low-frequency audio signals of the two channels "A" and "B", which serves to feed a connected sub woofer stereo power amplifier or two separate power amplifiers, respectively. The "Mute" switch attenuates the Sub Out Stereo audio signal, which allows to easily check the entire sound reinforcement system. The green "Signal" LED indicates the presence of audio signals while the red "Peak" LED lights when the audio signals are clipped inside the 731 which might result in distortion. In case the "Peak" LED lights continuously, lowering the input "A" and input "B" level controls is recommended to maintain the entire dynamic range. 9. Hi Out Stereo The control is normally set to its center (0dB) position. This control is used to adjust the loudness level of the connected full-range or mid-hi cabinet power amplifiers. The "Mute" switch attenuates the Hi Out Stereo audio signal, which allows to easily check the entire sound reinforcement system. [. . . ] The low-frequency audio signal feeding channel "A" of the sub woofer power amplifier is present at the LO-output. The mid-high-frequency audio signal feeding channel "A" of the mid-hi or full-range power amplifier is present at the HI-output. 13. SUB MONO output The 731 Controller's outputs are electronically balanced (pin2 = +, pin3 = -, pin1 = shield). This output is meant for the connection of an additional active center sub woofer or sub woofer power amplifier. [. . . ]

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