GX-7 Power Amplifier User Guide
IMPORTANT SAFETY INSTRUCTIONS 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with a dry cloth. 7. Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions. 8. Do not install near any heat sources such as radiators, heat registers, stoves, or another apparatus (including amplifiers) that produces heat. 9.
Lexicon Inc. 3 Oak Park Bedford, MA 01730-1413 USA Tel: 781-280-0300 Fax: 781-280-0490 www.harmanspecialtygroup.com Customer Service Tel: 781-280-0300 Fax: 781-280-0499 Email: csupport@hsgav.com Lexicon and the Lexicon logo are registered trademarks of Harman International Industries, Inc. U.S. Patent Nos. D454,553; D454,860; 5,796,844; 5,870,480 and other worldwide patents issued and pending. © 2006 Harman International Industries, Incorporated. All rights reserved. Part No.
Introduction Lexicon DOCUMENTATION CONVENTIONS This document contains general safety, installation and operation instructions for the GX-7 Power Amplifier. It is important to read this user guide before attempting to use the product. Pay particular attention to safety instructions. The following symbols are used in the document: Appears on the component to indicate the presence of uninsulated, dangerous voltage inside the enclosure – voltage that may be sufficient to constitute a risk of shock.
GX-7 Introduction Table of Contents Getting Started About The GX-7 ........................................................................ 1-2 Highlights ............................................................................. 1-3 Product Registration .................................................................. 1-3 Installation Considerations......................................................... 1-3 Basic Operation Front Panel Overview ......................................................
1 Getting Started About The GX-7 ......................................................................... 1-2 Highlights ................................................................................................ 1-3 Product Registration ................................................................... 1-3 Installation Considerations..........................................................
Getting Started ABOUT THE GX-7 Thank you for purchasing a Lexicon Power Amplifier. The GX-7 is a high-performance power amplifier designed to meet the rigorous demands of today’s home theater installations. It is designed with full complementary circuitry from input to output. It includes a high-current power supply driven by a massive, custom-designed, toroidal transformer with two separate windings for each channel.
Getting Started GX-7 HIGHLIGHTS INSTALLATION CONSIDERATIONS • 125 Watts/8 ohms per channel • Massive toroidal power transformer with two windings for each channel To ensure optimal performance, pay particular attention to instructions below and to other precautions that appear throughout this user guide. • High-power supply voltage for extra headroom at the outputs DO be careful when moving the amplifier, as it is quite heavy.
2 Basic Operation Front Panel Overview ................................................................ 2-2 Rear Panel Overview .................................................................. 2-3 Power Control Connections ....................................................... 2-5 Protection Mode .......................................................................
Basic Operation Lexicon FRONT PANEL OVERVIEW The GX-7 front panel is shown below. The standby/on button is the only front panel control. STANDBY/ON BUTTON Activates and deactivates standby mode when the GX-7 amplifier is powered on with the rear panel master power switch. The standby/on button performs no function when the amplifier is powered off with the rear panel master power switch. When the unit is on, pressing the standby/on button activates standby mode and deactivates the power amplifier.
Basic Operation GX-7 REAR PANEL OVERVIEW The GX-7 rear panel is shown below. The numbers in the rear panel illustrations correspond with the numbered description items. 3 1 TRIGGER INPUT 12VDC INPUTS RIGHT RIGHT SIDE RIGHT REAR CENTER LEFT REAR LEFT SIDE 4 LEFT GX-7 LEXICON, INC. DESIGNED AND ASSEMBLED IN U.S.A. FUSE 10A 250V 3AB Slo-Blo AC 120V 50-60Hz 1200W ~ SERIAL NO.
Basic Operation 2 AUDIO OUTPUT CONNECTORS Provide audio output for the speakers. Output connectors can accept bare speaker wires, banana plug connectors, or certain spade connectors. When using bare speaker wires, loosen the connector, insert the wire into the top of the receptacle, then tighten the connector. The same procedure should be used for spade connectors. Banana plugs should be inserted into the outward-facing receptacle.
GX-7 5 AC POWER CONNECTOR The AC input connector provides power to the unit with the supplied power cord. Do not use an extension cord. CAUTION! Never make or break connections to the GX-7 unless the GX-7 and all associated components are powered off.
Basic Operation POWER CONNECTION SAFETY After all audio and system connections have been made, connect the power cord to an AC power source. Be sure that the GX-7 is powered off and that the device connected to the remote trigger input is off when connecting the power cord and plugging it in to an AC outlet.
3 Troubleshooting & Maintenance Troubleshooting..........................................................................3-2 Maintenance...............................................................................
Troubleshooting & Maintenance Lexicon TROUBLESHOOTING A humming sound is present in the audio. The amplifier does not power on. 1. If a cable TV connection is present, disconnect the cable from the wall outlet. If this eliminates the humming sound, a ground loop isolation device is required. Contact your dealer or the cable provider for assistance. 1. Make sure the rear panel master power switch is set to the I “on”position. 2. Attempt to activate the amplifier with the front panel standby/on button.
A Appendix Specifications ............................................................................. A-2 Declaration of Conformity..........................................................
Appendix Lexicon SPECIFICATIONS Other Audio Input Connectors Trigger Input 5 to 12 Volts DC ± 10%, 3.5mm T/S jack Power Requirements 120V 60Hz 10 Amp [1200W] (domestic) 230V 50Hz 4 Amp [920W] (export) Height 5-inches Width 16.2-inches Depth 19.5-inches (including handles) 17.12-inches (not including handles) Weight 51 pounds (23.1 kg) Rack Mounting Optional brackets are available for mounting the amplifier in a standard 19-inch equipment rack.
Appendix GX-7 DECLARATION OF CONFORMITY Application of Council Directive(s): 2004/108/EEC and 73/23/EEC as amended by 93/68/EEC Standard(s) to Which Conformity is Declared: EN55013:2001 + A1:2003, EN55020:2002 + A1:2003 + A2:2005, EN61000-3-2:2000 + A2:2005, EN61000-3-3:1995 + A1:2001, EN60065:2002 Manufacturer: Harman Specialty Group 3 Oak Park Bedford, MA 01730-1413 USA The equipment identified here conforms to the Directive(s) and Standard(s) specified above.
PRODUCT REGISTRATION LIMITED WARRANTY The Harman Specialty Group offers the following warranty on this product: A valid serial number is required for warranty coverage. This warranty protects the original retail purchaser for a period of five (5) years (parts and labor) from any failure as a result of original manufacturing defects so long as: 1. The product was purchased within the 50 United States, its territories, or Canada. 2.
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