User manual QSC AUDIO RMX 4050HD

[. . . ] 11- Protect the power cord from being walked on or pinched, particularly plugs, convenience receptacles, and the point where they exit from the apparatus. To fully disconnect from the AC mains, the AC plug must be removed from the AC outlet or the appliance coupler (IEC block) must be removed from the amplifier module. Ensure either the AC line cord plug or the appliance coupler are accessible in case of emergency disconnect requirement. 14- Reliable Earthing (Grounding) of rack-mounted equipment should be maintained. [. . . ] Each channel's Gain control and loudspeaker connection remain independent. Bridge Mode- This setting combines both channels into a single channel with twice the output power. The load must be rated for the higher output power, and is connected as shown in the Outputs section. Do not connect different inputs to each side of a channel pair when operating in Parallel or Bridge Mode. Stereo Mode - Switches 4, 5, 6 and 7 are all set to the LEFT position. Bridge Mode- Switches 4, 5, 6, 7 and 8 are all set to the RIGHT position and Switch 10 is set to the LEFT position. SETTING LOW FREQUENCY FILTERS Each channel has a 12dB per octave Low Frequency Filter to prevent cone overexcursion, making more power available for the loudspeaker's rated frequency range. The Filter should only be turned off for driving subwoofers with special low frequency capability. Otherwise, unless you have filtering in the signal path preceding the amplifier, use the Low Frequency Filter. The loudspeaker's documentation will specify the low frequency limit. Each channel has its own switches for LF Filter on/off and frequency selection. Switches 2 and 9 select 30Hz or 50 Hz. BARRIER STRIP INPUTS Each channel has a balanced 3-terminal input. Wiring is connected with simple hand tools, and inputs can be changed quickly. Balanced connections are recommended to reduce AC hum and interference, especially with long cable runs. If unbalanced connections are required, connect a jumper wire between the minus (-) terminal and the ground terminal. Then connect the input signal to the positive (+) terminal and the shield to the minus or ground terminal. Balanced inputs: Strip the wires ¼ inch (6 mm) and connect to the terminals as shown. Be sure to tighten the screws firmly. Unbalanced inputs: Strip the wire ¼ inch and connect a jumper wire between the minus (-) terminal and the ground terminal. Then connect the input signal to the positive (+) terminal and the shield to the minus or ground terminal, as shown. 5 XLR and TRS (1/4") INPUTS Each channel has a balanced 3-terminal XLR and TRS input. Balanced connections are recommended to reduce AC hum and interference, especially with long cable runs. Unbalanced TRS connectors (2-terminal) automatically connect the minus (-) terminal to ground when inserted. OUTPUTS Wiring connections are shown on the back of the chassis. BINDING POST OUTPUTS Stereo and Parallel Mode: Wire as shown by loudspeaker symbols 1 and 2. In addition, Channel 1 accepts 4-wire cables for single cable stereo or bi-amp connection. OUTPUT TERMINAL SAFETY WARNING!Stereo and Parallel Mode- Connect each loudspeaker to its own channel of the amplifier, as shown on the left side of the chassis label. The Mode configuration switches must be set for Stereo or Parallel Mode. [. . . ] ("QSC") guarantees its products to be free from defective material and / or workmanship for a period of three (3) years from date of sale, and will replace defective parts and repair malfunctioning products under this warranty when the defect occurs under normal installation and use - provided the unit is returned to our factory or one of our authorized service stations via pre-paid transportation with a copy of proof of purchase (i. e. , sales receipt). This warranty provides that the examination of the return product must indicate, in our judgment, a manufacturing defect. This warranty does not extend to any product which has been subjected to misuse, neglect, accident, improper installation, or where the date code has been removed or defaced. This limited warranty is freely transferable during the term of the warranty period. [. . . ]