LX CX Power PowerAmplifier Amplifier User UserGuide 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) 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. 8) Do not block any ventilation openings.
DOCUMENTATION CONVENTIONS This document contains general safety, installation, and operating instructions for the CX-7 and CX-5 Power Amplifiers. It is important to read this user guide before attempting to use these products. Pay particular attention to safety instructions. The following symbols are used in this 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.
Introduction Introduction Lexicon Section 1: Getting Started About the CX Power Amplifiers . . . . . . . . . . . . . . . . . . . . . . . 1-2 Highlights US Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . .iii DE Auspackend und Inspektion . . . . . . . . . . . . . . . . . . . . .iii ES Desempaquetando e Inspección . . . . . . . . . . . . . . . . . .iii FR Déballer et Inspectión . . . . . . . . . . . . . . . . . . . . . . . . .iii IT Spacchettando ed Ispezione . . . . . . . . . .
Introduction CX Power Amplifiers US UNPACKING 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. DE DÉBALLER ET INSPECTIÓN Après avoir déballé l'unité, sauve toutes les matières de l'emballage au cas où vous avez besoin jamais de transporter l'unité.
1 Getting Started About the CX Power Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Highlights Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started Lexicon ABOUT THE CX POWER AMPLIFIERS to provide at-a-glance viewing of channel status at all times. Thank you for purchasing a CX Power Amplifier, a reference-quality amplifier, which is based on the award-winning LX amplifier and is designed to meet the highest standards of power and performance under even the most extreme operating conditions.
Getting Started CX Power Amplifiers HIGHLIGHTS PRODUCT REGISTRATION • 140 Watts per channel • Four custom designed, hand-graded output transistors per channel • Oversized toroidal power transformer with extraordinarily low DC resistance and thermal protection Please register the CX Power Amplifier within 15 days of purchase. To do so, register online at www.harmanspecialtygroup.com or complete and return the product registration card attached to the back cover of this user guide.
2 Basic Operation Front Panel Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Rear Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Protection Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic Operation Lexicon FRONT PANEL OVERVIEW 1 1. Standby Button Activates and deactivates standby mode when the CX amplifier is powered on with the rear panel power switch. The standby button performs no function when the CX amplifier is powered off with the rear panel power switch, or when the trigger switch is set to ON or DELAY (see page 2-7 for more detail). When the unit is on, pressing the standby button activates standby mode and deactivates the CX amplifier.
Basic Operation CX Power Amplifiers 1 2 2. Channel Status LEDs Provide an at-a-glance view of the status of each channel as indicated in the table below: Color Status Constant Blue Normal Operation Constant Bright Blue Indicates the audio signal is clipping. Reduce volume level to help eliminate potentially damaging audio signals from reaching the speakers. Flashing Blue The temperature of the individual amplifier heatsink is above 95˚C. If this occurs, the channel will not pass audio.
Basic Operation Lexicon REAR PANEL OVERVIEW 5 7 8 3 4 The CX-7 rear panel is shown above. The CX-5 rear panel is shown on page 2-6. The rear panels are similar, except the CX-7 amplifier includes two additional channels. 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.
Basic Operation CX Power Amplifiers 1. Power Switch 4. OUTPUT 1 to 7 (CX-7) or 1 to 5 (CX-5) Disconnects power to the AC Input Connector. Set this switch to off when making or breaking connections to the amplifier. 2. AC Input Connector The AC input connector provides power to the unit with the supplied power cord (3 conductor, 14AWG). Do not use an extension cord. For optimal performance, use an isolated power receptacle with adequate current (at least 15 Amps).
Basic Operation Lexicon REAR PANEL OVERVIEW (continued) 5 8 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. 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.
Basic Operation CX Power Amplifiers . . . continued from page 2-5 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. 6.
Basic Operation Lexicon PROTECTION MODES CURRENT PROTECTION The CX amplifiers are equipped to protect against overheating and miswiring, as well as electrical failures such as short circuits, device failures, internal faults, and DC output to the speakers. The CX amplifiers use a combination of voltage and current information to protect the output transistors. The amount of current capable of being delivered to the load is dependent on how much voltage appears across the output transistors.
3 Troubleshooting & Maintenance Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting & Maintenance 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 red 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 more than 10% below the mains supply voltage indicated in the Specifications (page A-2).
CX Power Amplifiers Troubleshooting & Maintenance Note: Visit www.harmanspecialtygroup.com for answers to frequently asked questions and additional troubleshooting information. MAINTENANCE The following routine maintenance should be performed on a periodic basis: • Clean the exterior surfaces of the unit with a soft, dry, lint-free cloth. Do not use alcohol, benzene, acetone-based cleaners, or strong commercial cleaners. Do not use a cloth made with steel wool or metal polish.
A Appendix Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 Declaration of Conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix Lexicon SPECIFICATIONS Audio Input Connectors Performance (Continued) CX-7 7 RCA, 7 XLR IM Distortion Below 0.
Appendix CX Power Amplifiers 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 61000-3-3:1995, EN 55022:1992 (Class B), EN 55103-2:1996, and EN 60065:1998 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.
I Index 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 . . . . . . . . . . . . . . . . . . .2-4, 2-5, 2-6, 3-2 Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . .2-8 Current Protection . . . . . . . . . . . . . . . . . . . . . . . .2-8 DC Protection . . . . . . . . . .
LIMITED WARRANTY Harman Specialty Group offers the following warranty on this product: 2. Damage occurring during any shipment of this product. Claims for shipping damages must be made with the carrier. 3. 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.) What is the Duration of this Warranty? 3.
PERMIT NO. 67 BEDFORD MA BUSINESS REPLY MAIL FIRST-CLASS MAIL POSTAGE WILL BE PAID BY ADDRESSEE PRODUCT REGISTRATION HARMAN SPECIALTY GROUP 3 OAK PARK BEDFORD MA 01730-9863 NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES Harman Specialty Group 3 Oak Park Bedford, MA 01730-1413 USA Tel 781-280-0300 Fax 781-280-0490 www.harmanspecialtygroup.com Customer Support Tel 781-280-0300 Fax 781-280-0495 (Sales) Fax 781-280-0499 (Service) Part No.
