User manual LEXICON CX

[. . . ] LX Power Amplifier CX Power Amplifier User Guide User Guide IMPORTANT SAFETY INSTRUCTIONS 1) 2) 3) 4) 5) 6) 7) 8) 9) Read these instructions. In CE countries, this amplifier is considered "professional equipment. " In order to comply with CE requirements, the customer is required to obtain permission from the local supply authority before connecting this equipment. Install in accordance with the manufacturer's instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatuses that produce heat. 10) Do not defeat the safety purpose of the polarized or grounding-type plug. [. . . ] INPUT 1 to 7 (CX-7) or 1 to 5 (CX-5) Provide audio input for the speakers connected to the corresponding audio outputs. When using the unbalanced (RCA) audio inputs, make sure the UNBAL/BAL switch located below each XLR connector is set to UNBAL. When using the balanced (XLR) audio inputs, make sure the UNBAL/BAL switch is set to BAL. The illustration below shows the appropriate cable pin-out for XLR connectors. WARNING Do not connect the OUTPUTs of one channel to the OUTPUTs of other channels or to other amplifiers. Note: Speakers must have impedance ratings of 2 or higher. Using speakers with lower than recommended impedance ratings might activate protection modes. Male Cable End 2 = Positive . continued on page 2-7 3 = Negative 1 = Ground 2-5 Basic Operation REAR PANEL OVERVIEW (continued) 5 8 Lexicon 7 3 4 The CX-5 rear panel is shown above. The CX-7 rear panel is shown on page 2-4. Both are similar, except the CX-7 features two additional channels. 6 2 1 WARNING External wiring connected to connectors marked with the icon pictured at the left requires installation by a qualified person or the use of ready-made leads or cords. 2-6 CX Power Amplifiers . continued from page 2-5 Basic Operation 7. TRIGGER INPUT Enables the amplifier to be controlled by the MC-12/MC-8 or other external devices with a 12V DC trigger output. Connect the trigger output of the external device to the TRIGGER INPUT of the amplifier, and set the TRIGGER switch on the amplifier to ON or DELAY. The amplifier will automatically respond when the external device is powered on and off. 5. UNBAL/BAL Switch Selects between unbalanced (RCA) or balanced (XLR) audio input for each channel. Power the amplifier off or reduce system volume before changing the setting of the UNBAL/BAL switch. If the amplifier is connected to a digital controller such as the MC-12 or MC-8, output levels should be re-calibrated whenever the setting is changed. 8. TRIGGER INPUT Switch When set to OFF, the amplifier only powers on and off in response to the front panel standby button. When set to ON or DELAY, only the external device connected to the TRIGGER INPUT can be used to power the amplifier on and off. The front panel standby button will not power the unit on and off. (However, the standby LED still functions normally. ) 6. GROUND LIFT Switches When set to ON, isolates the ground connection between that channel's audio inputs and the chassis. This can be useful for eliminating audible hum or noise caused by multiple grounding paths in the system. When set to OFF, the audio input is grounded to the chassis. [. . . ] Claims for shipping damages must be made with the carrier. Damage to a unit that has been altered, or on which the serial number has been defaced, modified, or removed. Include a copy of the original dated sales receipt. (A copy of the original dated sales receipt must be presented whenever warranty service is required. ) Do not include accessories such as power cords or user guides unless instructed to do so. [. . . ]