User manual ELECTRO-VOICE 672 DATASHEET
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Manual abstract: user guide ELECTRO-VOICE 672DATASHEET
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. With buying a Electro-Voice CP-SERIES power amplifier you have chosen an appliance that employs most advanced technology. Optimised power supply units employing low-leakage toroidal transformers and the consistent use of Class-H technology provide extensive headroom far above the stated nominal output. At the same time this contributes to a reduction in weight and power dissipation. [. . . ] The recessed mounted dB-scaled level controls ensure reliable protection against mechanical damage. These particularly precise, secure to operate detent-potentiometers are located on the front panel. CP-Series power amps provide the opportunity for retrofitting an internal analogue signal processor board with x-over and filter functions. The easily readable LED display provides a quick overview of the power amp's current operational status. The power outputs CHANNEL A, CHANNEL B and BRIDGED OUT are carried out as extremely durable SPEAKON-type connectors. Also located on the rear panel is a Ground-lift switch, which helps eliminating ground-noise loops by separating the power amp's enclosure from the circuit ground. In normal operation, all CP-Series power amps are capable of driving loads as low as 2ohms. This owner's manual outlines and explains several other features of your CP-Series power amplifier. Please, make sure to carefully read all of it and mind the instructions. Next to the power amplifier itself, the package also includes this owner's manual, a mains cord and the warranty certificate. Keep the original invoice, which states the purchase/delivery date together with the warranty certificate at a safe place. In addition, the 0dB indicator comes in handy when adjusting external limiters. This indicator lights as soon as the integrated dynamic audio signal limiter is activated and the power amplifier is driven at the clipping limit or generally at its maximum capacity. Short-term blinking is not a problem, because the internal limiter controlls input levels of up to +21dBu down to a THD of approximately 1%. If, on the other hand, this LED lights constantly, reducing the volume is recommended to prevent the loudspeaker systems connected from being damaged by probable overload. To prevent distortion in mixing consoles connected to your CP-Series amp, setting these controls to a value between 0dB and -6dB is generally recommended. The XLR-type connectors OUTPUT A & OUTPUT B are prepared for , , through-connecting" input signals to additional external power amps. There are no repeaters or other electronic components within that signal path. Accordingly, input and output connectors of the corresponding channel are interconnected in parallel, offering permanent electrical connection, without regard to the setting of the Power-ON switch. Although having XLR-type output connectors, some mixing console models provide unbalanced output connection only. When using mixers with unbalanced outputs, bridging PIN1 and PIN3 of the power amp's input connectors or leaving PIN3 of the cable's plugs unconnected is necessary. Otherwise, when feeding in unbalanced audio signals via PIN3 (b, -, , , cold") and PIN2 (a, +, , , hot"), strange humming and HF-interference may occur, which very likely will damage the power amplifier and/or the connected speaker cabinets. [. . . ] Operating the power amp in Bridged Mode with loads of 2ohms connected is not allowable. CAUTION: Extremely high voltages might be present at the BRIDGED OUT connector during Bridged-Mode operation. the connected loudspeaker systems have to be capable of handling such high voltages. Please make sure that power handling specifications as stated in the documentation supplied with your speaker systems match the specifications of the power amplifier. [. . . ]
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