User manual LEXICON LX

[. . . ] User Guide IMPORTANT SAFETY INSTRUCTIONS 1) 2) 3) 4) 5) 6) 7) 8) 9) Read these instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatuses that produce heat. Do not defeat the safety purpose of the polarized or grounding-type plug. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10) Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus. [. . . ] When using bare speaker wires, loosen the connector, insert the wire into the top of the receptacle, then tighten the connector. Use heavy gauge speaker cable to ensure low-impedance connections between the amplifier and the speakers. Observe correct speaker polarity. Note: If the rear panel MODE switch is set to INDIVIDUAL, speakers must have impedance ratings of 2 or higher. If set to (BRIDGED), speakers must have impedance ratings of 4 or higher. Using speakers with lower impedance ratings might activate protection modes. MODE Switch Configures channels 1 and 2 or 3 and 4 for INDIVIDUAL or (BRIDGED) operation. When set to INDIVIDUAL, all INPUTs and OUTPUTs function as separate channels. When set to (BRIDGED), the selected INPUTs and OUTPUTs are combined to create a single high-power channel. . continued on page 2-7 Male Cable End 2 = Positive 3 = Negative 1 = Ground 2-5 Basic Operation REAR PANEL OVERVIEW (continued) 6 9 8 Lexicon 3 4 5 The LX-5 rear panel is pictured above. Both are identical, except the LX-7 features two additional channels. 7 2 1 WARNING External wiring connected to connectors marked with the triangle pictured at the left requires installation by an instructed person or the use of ready-made leads or cords. 2-6 LX Power Amplifiers 5. TRIGGER INPUT Enables the amplifier to be controlled by the MC-12 or other external devices with a 12V DC trigger output. Connect the trigger output of the external device to the TRIGGER INPUT of the amplifer, 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. 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. (However, the standby LED still functions normally. ) When set to DELAY, the normal 5 second power on delay is extended to approximately 7 seconds. The TRIGGER INPUT Switch setting will not take effect until the amplifier has been power cycled. Make sure the amplifier is powered off when the MODE switch setting is changed. INPUTs and OUTPUTs used in (BRIDGED) mode are labelled in parenthesis. Do not use other INPUTs and OUTPUTs that are not labelled in parenthesis. Connect the positive speaker lead to the positive (red) OUTPUT of the first channel, and connect the negative speaker lead to the positive (red) OUTPUT of the second channel. UNBAL/BAL Switch Selects between unbalanced (RCA) or balanced (XLR, tip/ring/ sleeve) audio input for each channel. Power the amplifier off or reduce system volume before changing the setting of the UNBAL/BAL switch. [. . . ] Do not use alcohol, benzene, acetone-based cleaners, or strong commercial cleaners. If the unit is exposed to a dusty environment, a low-pressure blower may be used to remove dust from its exterior. 3-3 A Appendix Specifications . A-3 Appendix SPECIFICATIONS Audio Inputs LX-7 LX-5 7 RCA, 7 XLR (including 1/4-inch tip/ring/sleeve) 5 RCA, 5 XLR (including 1/4-inch tip/ring/sleeve) Performance (continued) Frequency Response THD 20Hz to 20kHz 0. 1dB 10Hz to 100kHz +0. 5/-3dB Below 0. 02%, 200W at 8, all channels driven 20Hz to 20kHz 111dB 22kHz bandwidth, balanced inputs 109dB 22kHz bandwidth, unbalanced inputs (Ref 200W at 8) IM Distortion Crosstalk Input Sensitivity Below 0. 03% at 200W -80dB at 1kHz, minimum 2V in for 100W out at 8, balanced inputs 1V in for 100W out at 8, unbalanced inputs Input Impedance Gain 20k, balanced 10k, unbalanced 23dB, balanced 29dB, unbalanced Other Trigger Input Power Requirements Dimensions Height Width Depth Weight LX-7 LX-5 56lbs (25. 4kg) 52lbs (23. 6kg) 12V DC +/- 10% 120V 60Hz 20A (Domestic) 230V 50Hz 12. 5A (Export) Lexicon Audio Outputs LX-7 LX-5 7 pairs of heavy-duty binding posts 5 pairs of heavy-duty binding posts Signal-toNoise Ratio 5. 65 inches (144mm) 17. 3 inches (440mm) 19 inches (483mm) Performance Amplifier performance specifications are identical in INDIVIDUAL and (BRIDGED) Modes, with the exception of Output Power and Minimum Speaker Impedance. Output Power 200W at 8, all channels driven 20Hz to 20kHz 400W at 8, {BRIDGED) Minimum Speaker Impedance 2, INDIVIDUAL Mode 4, (BRIDGED) Mode Damping Factor 250 at 20Hz, minimum Rack Mounting Optional brackets are available for mounting either amplifier in a standard 19-inch equipment rack Specifications are subject to change without notice A-2 LX Power Amplifiers Appendix DECLARATION OF CONFORMITY Application of Council Directive(s): 89/336/EEC and 93/68/EEC Standard(s) to which Conformity is Declared: EN 55103-1:1995, EN 61000-3-2:1995+A14:2000, EN 61000-3-3:1995, EN 55022:1992 (Class B), EN 55103-2:1996, and EN 60065:1998 Lexicon, Inc. [. . . ]