User manual GEMINI GXA-750

[. . . ] POWER-CORD PROTECTION: Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the product. OUTDOOR ANTENNA GROUNDING: If an outside antenna or cable system is connected to the product, be sure the antenna or cable system is grounded so as to provide some protection against voltage surges and built-up static charges. Article 810 of the National Electrical Code, ANSI/NFPA 70, provides information with regard to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding conductors, location of antenna-discharge unit, connection to grounding electrodes, and requirements for the grounding electrode. LIGHTNING: For added protection for this product during a lightning storm, or when it is left unattended and unused for long periods of time, unplug it from the wall outlet and disconnect the antenna or cable system. [. . . ] Always make sure that this switch is in the correct position and that all speaker connections have been made correctly for the mode of operation you wish to use before powering up the amplifier. SIGNAL LED: The SIGNAL LED (16) for each channel show when a signal is present. In MONO BRIDGE mode, both the CHANNEL A LED and the CHANNEL B LED will light in unison. CLIP LED: The amplifier has true CLIP LED (17) to help you properly control the amplifier's output and achieve undistorted sound. The CLIP LED (17) for each channel light when your signal level is so strong that the distortion reaches 1% THD. The CLIP LED (17) should not remain constantly on or flash repeatedly during operation. For clean sound reproduction, the CLIP LED (17) should only light occasionally for an instant. If the LED remains on or flashes repeatedly, you will hear distorted sound that can be damaging to your speaker systems. If this occurs, reduce the signal level by lowering the input level control for the channel that is clipping or reduce the level at the source. If the CLIP LED (17) lights when no signal is present, it may indicate a DC level on the output which may cause damage to speakers (the DC level will not be audible). Please note that when you are using the amplifier in the MONO BRIDGE mode, both CLIP LED (17) of the bridged channels will operate simultaneously. PROTECT LED: PROTECT LED (18) when you first turn on the amplifier, the PROTECT LED light briefly during a turn-on delay which indicates that the outputs are disconnected internally. There will be an audible click when the outputs reconnect and the PROTECT LED (18) will turn off. Otherwise, the PROTECT LED (18) indicates that there is a problem either in the amplifier's external connections, load or temperature conditions or its internal functions. If one of these situations occur, the amplifier senses the problem and automatically switches into PROTECTION mode. The LED will light to warn you of the trouble and the amplifier will stop working. If this occurs, switch off the amplifier and refer to the Trouble Shooting Guide. If the PROTECT LED (18) remains lit when resuming amplifier operation, do not use the amplifier and contact an authorized service technician. lEVEL CONTROLS: LEVEL CONTROLS (19 , 20) establish the input levels required for each channel. Please contact the Customer Gemini Service Department or your authorized dealer to speak to a qualified service technician. Be sure to allow adequate front and rear ventilation to avoid possible heat damage to your equipment. Be sure that AC power is OFF and all level controls are set to MINIMUM before making connections. [. . . ] If the LED does not illuminate, you have the switch in the wrong position. With the power off, connect your input cables to the CHANNEL A input only using the either the XLR INPUT JACK (5) or 1/4" INPUT JACK (7) of CHANNEL A. The other CHANNEL A input can be used to link to an additional amplifier. If you try to operate at a lower impedance, the amplifier will go into PROTECTION MODE and stop operation until you correct the load conditions. [. . . ]