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Lexicon 070-14876 manual

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Table of contents for the manual

  • Page 1

    LX Po wer Amplif ier User Guide[...]

  • Page 2

    IMPOR T ANT SAFETY INSTR UCTIONS 1) Read these instructions. 2) K eep these instructions. 3) Heed all warnings. 4) Follo w all instructions. 5) Do not use this apparatus near water . 6) Clean only with a dr y cloth. 7) In CE countries, this amplifier is considered “prof essional equipment. ” In order to comply with CE requirements, the customer[...]

  • Page 3

    DOCUMENT A TION CONVENTIONS This document contains general saf ety , installation, and operating instructions for the LX-5 and LX-7 P ower Amplifiers. It is im por tant to read this user guide before attempting to use these products . Pa y par ticular attention to safety instructions. The follo wing symbols are used in this document: Appears on the[...]

  • Page 4

    ii Introduction Lexicon Introduction Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . .iii Auspackend und Inspektion . . . . . . . . . . . . . . . . . . . . .iii Desempaquetando e Inspección . . . . . . . . . . . . . . . . . .iii Déballer et Inspectión . . . . . . . . . . . . . . . . . . . . . . . . .iii Spacchettando ed Ispezi[...]

  • Page 5

    iii Introduction LX Power Amplifiers UNP ACKING AND INSPECTION After unpacking the unit, save all packing materials in case the unit ever needs to be shipped. Thoroughly inspect the modules and packing materials for signs of damage. Report any damage to the carrier at once; report equipment malfunction to the dealer . AUSP ACKEND UND INSPEKTION Üb[...]

  • Page 6

    1 Getting Started About the LX Power Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Highlights Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Installation Considerations . . . . . . . . . . . . . . . . [...]

  • Page 7

    Getting Started Lexicon 1-2 ABOUT THE LX POWER AMPLIFIERS Thank you for purchasing an LX Power Amplifier , a reference-qual- ity amplifier designed to meet the highest standards of power and performance under even the most extreme operating conditions. Equipped with advanced thermal, DC, and speaker protection, the LX amplifiers deliver reliable an[...]

  • Page 8

    PRODUCT REGISTRA TION Please register the LX Power Amplifier within 15 days of purchase. To do so, register online at www .lexicon.com or complete and return the product registration card attached to the back cover of this user guide. The product registration card serves no warranty purposes. Retain the sales receipt as proof of warranty coverage. [...]

  • Page 9

    2 Basic Operation Front Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Rear Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 10

    Basic Operation Lexicon 2-2 FRONT P ANEL OVERVIEW 1 2 1. Standby Button Activates and deactivates standby mode when the LX amplifier is powered on with the rear panel power switch. The standby button performs no function when the LX amplifier is powered off with the rear panel power switch. When the unit is on, pressing the standby button activates[...]

  • Page 11

    Basic Operation LX Power Amplifiers 2-3 1 2 2. Channel Status LEDs Provide at-a-glance view of the status of each channel as indicated in the table below: Note: When the main power transformer temperature exceeds 110˚C: • the transformer will deactivate •the channel status LEDs will no longer be lit •the standby LED will flash rapidly Color [...]

  • Page 12

    Basic Operation Lexicon 2-4 REAR P ANEL OVERVIEW The LX-7 rear panel is shown above. The LX-5 r ear panel is shown on page 2-6. The rear panels ar e similar , except the LX-7 amplifier includes two additional channels. 1 8 9 3 6 4 5 2 7 External wir ing connected to connectors marked with the triangle pictured at the left requires installation by a[...]

  • Page 13

    Note: If the rear panel MODE switch is set to INDIVIDUAL, speakers must have impedance ratings of 2 Ω or higher . If set to (BRIDGED), speakers must have impedance ratings of 4 Ω or higher . Using speakers with lower than recommended impedance ratings might activate protection modes. 5. MODE Switch Configures channels 1 and 2 or 3 and 4 for IND[...]

  • Page 14

    Basic Operation Lexicon 2-6 REAR P ANEL OVERVIEW (continued) The LX-5 rear panel is shown above. The LX-7 r ear panel is shown on page 2-4. Both are similar , except the LX-7 features two additional channels. 1 8 9 3 6 4 5 2 7 External wir ing connected to connectors marked with the triangle pictured at the left requires installation by an instruct[...]

  • Page 15

    Basic Operation LX Power Amplifiers 2-7 5. MODE Switch (continued from page 2-5) 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 INPUT s and OUTPUT s that are not labelled in parenthesis. Connect the positive speaker lead to the p[...]

  • Page 16

    Basic Operation Lexicon 2-8 COOLING SYSTEM The LX Power Amplifiers use temperature-controlled fans to exhaust heat. Heatsink temperatures are measured hundreds of times each second. Under most conditions, the fans are set to a slow speed. When the temperature climbs above 85˚C, the fans are set to a medium speed. When the temperature climbs above [...]

  • Page 17

    Basic Operation LX Power Amplifiers 2-9 DC PROTECTION Each channel includes DC protection to prevent DC and frequencies below 10Hz from reaching the speakers. If this protection activates, the output relay will open and the corresponding front panel channel status LED will no longer be lit. After approximately 4-seconds, DC protection will be autom[...]

  • Page 18

    3 Tr oubleshooting & Maintenance T roubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3[...]

  • Page 19

    Tr oubleshooting & Maintenance Lexicon 3-2 TROUBLESHOOTING No front panel LEDs are lit. 1. Make sure the unit is plugged in and the rear panel power switch is set to on. The Standby LED is flashing rapidly . 1. Power the amplifier off. Allow the amplifier to cool before powering it on again. 2. Check the incoming line voltage. It should not be [...]

  • Page 20

    Tr oubleshooting & Maintenance LX Power Amplifiers 3-3 The amplifier and other electrical devices in the listening room suddenly lose power . 1. Reset the cir cuit breakers for the affected device(s). If all else fails . . . 1. Contact an authorized Lexicon dealer . 2. Contact Lexicon customer service. Note: V isit www .lexicon.com for answers [...]

  • Page 21

    A Appendix Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 Declaration of Conformit y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4[...]

  • Page 22

    Amplifier performance specifications are identical in INDIVIDUAL and (BRIDGED) Modes, with the exception of Output Power and Minimum Speaker Impedance. (BRIDGED) Mode includes channels 1 & 2 and 3 & 4 only . Output Power • 200W at 8 Ω , all channels driven 20Hz to 20kHz • 400W at 8 Ω , (Bridged) Audio Output Connectors Appendix Lexi[...]

  • Page 23

    Appendix LX Power Amplifiers A-3 Other (Continued) W eight LX-7 LX-5 • 56lbs (25.4kg) • 52lbs (23.6kg) Rack Mounting Optional brackets are available for mounting either amplifier in stan- dard 9-inch equipment rack Specifications are subject to change without notice[...]

  • Page 24

    Appendix Lexicon A-4 Application of Council Directive(s): 89/336/EEC and 93/68/EEC Standard(s) to which Conformity is Declared: EN 55103-1:1995, EN 61000-3-3:1995, EN 55022:1992 (Class B), EN 55103-2:1996, and EN 60065:1998 Manufacturer: Lexicon, Inc. 3 Oak Park Bedford, MA 01730-1441 USA The equipment identified here conforms to the Directive(s) a[...]

  • Page 25

    Index I (BRIDGED) Mode . . . . . . . . . . . . . . . . . . . . . .2-5, 2-7 AC Input Connector . . . . . . . . . . . . . . . . . . . . . . .2-5 AC Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7 BAL/UNBAL Switch . . . . . . . . . . . . . . . . .2-5, 2-7, 3-2 Channel Status LEDs . . . . . . . . .2-2, 2-3, 2-8, 2-9, 3-2 Connectors [...]

  • Page 26

    Lexicon, Inc. 3 Oak P ark Bedford, MA 01730-1413 USA Te l 781-280-0300 Fa x 781-280-0490 www .lexicon.com Customer Support Te l 781-280-0300 Fa x 781-280-0495 (Sales) Fa x 781-280-0499 (Service) LIMITED W ARRANTY Lexicon, Inc. offers the follo wing warr anty on this product: What is the Duration of this Warranty? This warranty will remain in eff ec[...]

  • Page 27

    Lexicon, Inc. 3 Oak Park Bedford, MA 01730-1413 USA Te l 781-280-0300 Fa x 781-280-0490 www .lexicon.com Customer Support Te l 781-280-0300 Fa x 781-280-0495 (Sales) Fa x 781-280-0499 (Service) Lexicon P ar t No. 070-14876 | Rev 3 | 03/03[...]