ZX-7 / RX-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 Drive Bedford, MA 01730-1413 USA Tel 781-280-0300 Fax 781-280-0490 www.hsgav.com Customer Service Telephone: 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. © 2007 Harman International Industries, Incorporated. All rights reserved. Part No.
Introduction Lexicon DOCUMENTATION CONVENTIONS This document contains general safety, installation and operation instructions for the RX-7 and ZX-7 Power Amplifiers. 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.
ZX-7 / RX-7 Introduction Table of Contents Getting Started About The ZX-7 and RX-7 ......................................................... 1-2 Product Registration .................................................................. 1-2 Highlights ................................................................................. 1-3 Installation Considerations......................................................... 1-3 Basic Operation Front-Panel Overview .................................................
1 Getting Started About The ZX-7 and RX-7 .......................................................... 1-2 Product Registration ................................................................... 1-2 Highlights .................................................................................. 1-3 Installation Considerations..........................................................
Getting Started Lexicon ABOUT THE ZX-7 AND RX-7 Congratulations and thank you for purchasing your new Lexicon Power Amplifier. This is a reference-quality amplifier designed to meet the highest standards of power and performance under the most extreme operating conditions. Equipped with advanced thermal, current, DC, and speaker protection, your new amplifier delivers reliable and exceptional performance with most loudspeakers, including mismatched, reactive, and unusual loads.
Getting Started ZX-7/RX-7 HIGHLIGHTS INSTALLATION CONSIDERATIONS • ZX-7: 300 Watts per channel @ 8 Ohms RX-7: 200 Watts per channel @ 8 Ohms • Dual oversized toroidal power transformers with extraordinarily low DC resistance and thermal protection To ensure optimal performance, pay particular attention to the instructions below and to other precautions that appear throughout this user guide.
2 Basic Operation Front-Panel Overview ................................................................ 2-2 Standby Button ........................................................................................ 2-3 Rear-Panel ZX-7 230 VAC Overview .......................................... 2-4 Rear-Panel ZX-7 120 VAC Overview .......................................... 2-5 Rear-Panel RX-7 Overview ......................................................... 2-6 Power Control Connections ......................
Basic Operation Lexicon FRONT-PANEL OVERVIEW The ZX-7 front panel is shown below. The RX-7 front panel is shown on page 2-3. The standby button (1) is the only front-panel control on both amplifier models.
Basic Operation ZX-7/RX-7 STANDBY BUTTON Activates and deactivates standby mode when the ZX-7/RX-7 amplifier is powered on with the rear panel power switch. The standby button (1) performs no function when the amplifier is powered off with the rear panel power switch. When the amplifier is on, pressing the standby/on button activates standby mode and deactivates the power amplifier. While in standby mode, the front panel LED is red. Power is still supplied to the ZX-7/RX-7 when it is in standby mode.
Basic Operation Lexicon REAR-PANEL ZX-7 230 VAC OVERVIEW The ZX-7 230 VAC rear panel is shown below. The ZX-7 120 VAC rear panel is shown on page 2-5. The numbers in the rear-panel illustrations correspond with the numbered description items.
Basic Operation ZX-7/RX-7 REAR-PANEL ZX-7 120 VAC OVERVIEW 3 INPUTS RIGHT RIGHT SIDE RIGHT REAR CENTER LEFT REAR LEFT SIDE 3 CHASSIS GROUND LEFT 1 PUSH 2 PUSH PUSH 1 2 3 PUSH 1 2 1 2 3 3 PUSH PUSH 1 2 1 2 3 3 4 PUSH 1 2 TRIGGER INPUT 3 5 1 2 3 ZX-7 UE Class 2 Wiring + — — + — + OUTPUTS — + — + — + + — 6 7 RIGHT RIGHT SIDE RIGHT REAR CENTER LEFT REAR LEFT SIDE LEFT 1. Unbalanced Input Connectors 5. Master Power Switch/Circuit Breaker 2.
Basic Operation Lexicon REAR-PANEL RX-7 OVERVIEW 3 INPUTS RIGHT RIGHT SIDE RIGHT REAR CENTER LEFT REAR LEFT SIDE CHASSIS TRIGGER INPUT GROUND LEFT 1 4 PUSH PUSH 2 PUSH 1 2 1 2 1 2 3 PUSH PUSH PUSH 1 2 3 3 1 2 2 PUSH 1 5 1 2 3 3 3 3 RX-7 LEXICON DESIGNED AND ASSEMBLED IN U.S.A. SERIAL NO. Class 2 Wiring + — — + — + OUTPUTS — + NE PAS OUVRIR DO NOT OPEN — + — + + — 6 7 RIGHT RIGHT SIDE RIGHT REAR CENTER LEFT REAR LEFT SIDE LEFT 1.
Basic Operation ZX-7/RX-7 1 & 2 UNBALANCED/BALANCED INPUT 1 TO 7 CONNECTORS Provides audio input for the speakers connected through the unbalanced (RCA) inputs or balanced (XLR) inputs. The illustration below shows the appropriate cable pin-out for XLR connectors. Male Cable End 2 = Positive 3 = Negative 1 = Ground Caution! Never make or break connections to the ZX-7/RX-7 unless the ZX-7/RX-7 and all associated components are powered off.
Basic Operation restore AC power. If the circuit breaker immediately trips to the OFF position, unplug the amplifier from the AC power source and contact Lexicon Customer Service. Note: The Class 2 Wiring label is required for any unit in which the audio output power exceeds 10W per channel under normal operating conditions or if the unit is intended to be installed or connected by a skilled person.
Basic Operation ZX-7/RX-7 POWER CONTROL CONNECTIONS The ZX-7/RX-7 features a built-in remote power-on system that will automatically switch the amplifier on when another device in the system is switched on.
Basic Operation REMOTE POWER ON WITH EXTERNAL AC TO DC POWER CONVERTER If your preamplifier, processor or receiver does not have a dedicated trigger jack, it is still possible to activate the unit for automatic power on when a switched outlet is available on the source device rear panel. To control the ZX-7/RX-7 in this instance, a small AC to DC power converter capable of delivering a 3.3V DC minimum to 24V DC maximum signal is required. The DC voltage should terminate in a standard 1/8”mini-plug.
ZX-7/RX-7 Basic Operation PROTECTION MODE The ZX-7/RX-7 is equipped to protect itself against potentially damaging conditions such as overheating, mis-wiring and electrical failures. Under such conditions, the ZX-7/RX-7 will enter a protection mode. When this occurs, the unit will mute to protect itself and speakers from potential damage. If the ZX-7/RX-7 enters protection mode (mutes itself): 1. Immediately power off the unit with the rear panel master power switches and disconnect all AC power cords. 2.
3 Troubleshooting & Maintenance Troubleshooting..........................................................................3-2 Maintenance...............................................................................
Troubleshooting & Maintenance TROUBLESHOOTING The amplifier does not power on. 1. Check the rear panel circuit breakers. Ensure breakers have not been tripped. Lexicon 5. Allow the amplifier to cool before powering it on again. Audio sounds out-of-phase. Check to ensure proper speaker wiring. Audio levels differ. 2. Attempt to power on the amplifier with the front panel Standby button. Check the settings on your preamp, processor or controller. 3.
Troubleshooting & Maintenance Lexicon component is properly grounded and connected to the same electrical ground as the ZX-7/RX-7. 3. Turn off all components within your system, and then disconnect the input cable on the amplifier. Turn the amplifier back on. If the hum disappears the fault may be with the input cable that is being used. Make sure the cables are properly shielded or use a cable that has better shielding. Make sure the cable is not running or laying on top of any AC power cords.
A Appendix Specifications ............................................................................. A-2 Declaration of Conformity..........................................................
Appendix Lexicon SPECIFICATIONS Specifications are subject to change without notice. Audio Input Connectors ZX-7 / RX-7 Output Power 7 pairs of gold-plated binding posts ZX-7 Performance 200W RMS per channel into 8 ohms from 20 Hz - 20 kHz Power Requirements 120 VAC 14A 60 Hz / 230 VAC 6A 50/60 Hz Frequency Response 20 Hz to 20 kHz +0.1 / -0.2 dB THD Less than 0.05% at full rated FTC power 20 Hz - 20k Hz Less than 0.
Appendix ZX-7/RX-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, EN61000-3-3:1995 + A1:2001, EN60065:2002 Manufacturer: Harman Specialty Group 3 Oak Park Drive Bedford, MA 01730-1413 USA The equipment identified here conforms to the Directive(s) and Standard(s) specified above.
PRODUCT REGISTRATION Please register this product within 15 days of purchase. To do so, complete and return this card or register online at www.lexicon.com. Retain the original, dated Bill of Sale as proof of warranty coverage. LIMITED WARRANTY The Harman Specialty Group offers the following warranty on this product: A valid serial number is required for warranty coverage.
A Harman International Company #6 Part No.
