User manual ELECTRO-VOICE 1751

[. . . ] 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 14. T completely disconnect AC power from this apparatus, the power supply cord must be unplugged. Do not expose this apparatus to dripping or splashing and ensure that no objects filled with liquids, such as vases, are placed on this apparatus. [. . . ] 7 FCC Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Frequency Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3 SYSTEM DESCRIPTION Thank you for choosing the Electro-Voice® 1751 loudspeaker system. Please take time to consult this manual so that you can understand all the features built into your EV system and fully utilize all its performance capabilities. The Electro-Voice 1751 powered subwoofer is a fully integrated audio system with carefully matched electronics and transducers. This product makes it easy to setup a high quality sound system quickly with a minimum amount of cables and external electronics. The additional speaker output is useful to connect either a second subwoofer (e. g. Zx1, Sx80, or Sx300). System Features ­ 1751 · Integrated Amplifier with 350W for Internal Woofer and 350W for Optional External Speaker · Selectable Speakon® Output for Additional Sub or Fullrange System · XLR and 1/4" TRS Input Connector · XLR Parallel Output Connector · LED Indicators for Signal and Limit · Lockable IEC Mains Connector · Easy Fullrange System Setup with Optional Zx1, Sx80 or Sx300 4 SAFETY FIRST When setting up, installing and using the Electro-Voice 1751 speaker system, there are a number of precautions that you should follow: When Electro-Voice 1751 speakers are used for portable applications they should be positioned directly on the floor. Before turning the power on, make sure that the level controls are down to avoid transients or unexpected loud sound. CAUTION: Caution: For trouble - free operation exceeding a maximum ambient temperature of +40°C (104°F) is not permissible. This is a Class A product acording to FCC rules. In a domestic environment this product my cause radio interferences in which case the user may be required to take adequate measures. 6 AMPLIFIER CONTROLS LEVEL dB-scaled level control for adjusting the power amp's overall amplification. The level control affects the volume of the internal subwoofer as well as the AMP OUT connector. To prevent distortion and clipping of pre-linked mixing consoles, the control should generally be set to a value between 0dB and +6dB. LIMIT The LED brief blinking indicates that the power amplifier is operated at its limits. Short-term blinking is uncritical, because the integrated limiter keeps distortion under control. Constant lighting of the LED indicates that the sound is negatively affected. Reducing the output volume is strongly recommended. SIGNAL indicates that an audio signal is present at the input. It lights even if the level control is at its minimum position. OUTPUT This connector is connected in parallel to the input allowing the through connection of the input audio signal. [. . . ] If the supplied cable is lost, you may also use a standard IEC-cable without lockingmechanism. 7 FCC Information 1. Changes or modifications not expressly approved by the manufacturer could void the user's authority, granted by the FCC, to operate the equipment. NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. [. . . ]