User manual GEMINI X-04

[. . . ] DAMAGE REQUIRING SERVICE: Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions: · If the product does not operate normally by following the operating instructions. Adjust only those controls that are covered by the operating instructions as an improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the product to its normal operation. ⷠIf the product has been dropped or damaged in any way. ⷠWhen the product exhibits a distinct change in performance, this indicates a need for service. [. . . ] SPEAKER OUTPUTS (3-WAY-1/4"): The SPEAKER OUTPUTS connectors are 3-WAY BINDING POSTS (10, 11, 12) that will accept standard banana plugs, spade lugs, or bare wire; Make sure that all the connections are clean when using bare wire connections. If any strands of wire from one connector touch the adjacent connector, the sound will distort, and your amplifier will overheat and go into protection mode. State-of-the-art bi-polar output stage technology for the finest sound quality and reliability High output power to drive professional loudspeakers without clipping Comprehensive protection circuitry (Short Circuit, DC, Thermal Cut-off, Sub/Ultrasonic Frequency Filters, Turn-on Delay, Main Fuse, Secondary DC Fuses) Three modes of operation: stereo, parallel mono and mono bridge Ground lift switch for flexibility in installations Signal LED and Clip LED for better control on X-01, X-02, X-03 amplifers Large VU-meters and Clip LED for better control on X-04 amplifier Efficient dual aluminum extrusion heatsink design with directly mounted output transistors for no-fault operation Efficient air guide with front-to-rear airflow for thermal stability and reliability Compact 2U well balanced enclosure (3U for X-04 model) Steel reinforced chassis construction for durability and longevity 1/4" TRS & XLR balanced/unbalanced input connectors 1/4" as well as 3-way binding post speaker outputs ON/OFF: The ON/OFF (15) switch turns the unit on and off. if the POWER LED (16) does not light , refer to the troubleshooting guide. PROTECT LED: When you first turn on the amplifier, the PROTECT LEDS (17) 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 (17) will turn off. Otherwise, the PROTECT LED (17) 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 occurs, 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 TROUBLESHOOTING GUIDE. If the PROTECT LED (17) remains lit when resuming amplifier operation, do not use the amplifier and contact a GEMINI customer service representative. SIGNAL LED: The SIGNAL LED (18a) for each channel show when a signal is present. In MONO BRIDGE mode, both the CHANNEL 1 LED and the CHANNEL 2 LED will light in unison. Please contact the Gemini Service Department or your authorized dealer to speak to a qualified Gemini Sound Products 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. This will eliminate any chance of unexpected, loud audio transients that could damage your speaker systems. Be sure that AC power is OFF when changing modes of operation and when changing the position of the Ground Lift Switch. Operators of electronic equipment should in no way be in contact with water. When connecting to AC power line be sure you haven't lost the ground connection by using an adapter or extension cord without a 3 prong plug. VU METERS: Large illuminated VU METERS (18b) display the input level of each channel. CLIP LED: The amplifier has true CLIP LED (19) to help you properly control the amplifier's output and achieve undistorted sound. [. . . ] This mode is used to provide a higher voltage with greater headroom to your speaker. Before setting your amplifier for MONO BRIDGE operation, make sure that your speaker can handle the high power level provided by the amplifier in MONO BRIDGE mode. With the power off, set the OPERATION MODE SWITCH (5) to the BRIDGE position. With the power off, connect your input cables to CHANNEL 1 input only using the INPUT JACK, 1/4" (1) or XLR (3) of CHANNEL 1. [. . . ]