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.Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A groundingtype plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. 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.
11.Main Plug is considered to be the disconnect device for this product and shall remain readily operable.
To reduce the risk of fire or electric WARNING shock, do not expose this apparatus to
rain or moisture. Do not place objects containing liquid, such as vases, on this apparatus.
12.Only use attachments/accessories specified by the manufacturer.
13.Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over.
14.Unplug this apparatus during lightning storms or when unused for long periods of time.
15.Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as when a power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
•Refer to the manufacturer’s operating instructions for power requirements. Be advised that different operating voltages may require the use of different line cord and/or attachment plug.
•Do not install the unit in an unventilated rack, or directly above heat-producing equipment such as power amplifiers. Observe the
maximum ambient operating temperature listed in the product specification.
•Never attach audio power amplifier outputs directly to any of the unit’s connectors.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and radiates radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on. The user is encouraged to try to correct the interference by one or more of the following measures:
•Re-orient or relocate the receiving antenna.
•Increase the separation between the equipment and the receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•Consult the dealer or an experienced electronic technician for help.
This triangle, which appears on your component, |
CAUTION |
This triangle, which appears on your component, |
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alerts you to the presence of uninsulated, |
alerts you to important operating and |
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dangerous voltage inside the enclosure - |
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maintenance instructions in this |
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RISK OF ELECTRIC SHOCK |
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voltage that may be sufficient to |
accompanying literature. |
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constitute a risk of shock. |
DO NOT OPEN |
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Lexicon Inc.
3 Oak Park Drive
Bedford, MA 01730-1413 USA Tel 781-280-0300
Fax 781-280-0490 www.hsgav.com
Customer Service |
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Telephone: |
781-280-0300 |
Lexicon and the Lexicon logo are registered trademarks of Harman International Industries, Inc. U.S. Patent Nos. D454,553; |
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Fax: |
781-280-0499 |
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D454,860; 5,796,844; 5,870,480 and other worldwide patents issued and pending. |
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email: csupport@hsgav.com |
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© 2007 Harman International Industries, Incorporated. All rights reserved. |
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This document should not be construed as a commitment on the part of Harman Specialty Group. The information it contains is |
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Part No. 070-18130 | Rev 0 | 03/07 |
subject to change without notice. Harman Specialty Group assumes no responsibility for errors that may appear within this |
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document. |
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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.
Appears on the component to indicate important operating and maintenance instuctions in the accompanying literature.
WARNING
Calls attention to a procedure, practice, condition or the like that, if not correctly performed or adhered to, could result in injury or death.
CAUTION!
Note:
Calls attention to a procedure, practice, condition or the like that, if not correctly performed or adhered to, could result in damage or destruction to part or all of the product.
Calls attention to information that is essential to highlight.
ii
ZX-7 / RX-7 |
Introduction |
Table of Contents |
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Getting Started |
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About The ZX-7 and RX-7 ......................................................... |
1-2 |
Product Registration .................................................................. |
1-2 |
Highlights ................................................................................. |
1-3 |
Installation Considerations......................................................... |
1-3 |
Basic Operation |
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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....................................................... |
2-9 |
Remote Trigger Power On ..................................................... |
2-9 |
Remote Power On with External AC to DC Power Converter 2-10 |
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Power Connection Safety .................................................... |
2-10 |
Source Component Connections & Output Settings ........... |
2-10 |
Protection Mode ..................................................................... |
2-11 |
Troubleshooting & Maintenance |
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Troubleshooting........................................................................ |
3-2 |
Maintenance ............................................................................. |
3-3 |
Appendix |
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Specifications ............................................................................ |
A-2 |
Declaration of Conformity ......................................................... |
A-3 |
iii
1
Getting Started
About The ZX-7 and RX-7 .......................................................... |
1-2 |
Product Registration ................................................................... |
1-2 |
Highlights .................................................................................. |
1-3 |
Installation Considerations.......................................................... |
1-3 |
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. With embedded protection against short circuits, component failures, mis-wiring, and internal faults, the incredible power and wide-ranging flexibility of the ZX-7 and RX-7 amplifiers confirm that they are at home in the most sophisticated and demanding home theaters.
Both the ZX-7 and RX-7 are fully balanced power amplifiers from input to output with completely symmetrical circuit design. In other words, each channel consists of two complete amplifier circuits; one driving the positive input signal and the other driving the negative input signal. With 7 channels, this translates into 14 separate amplifier circuits per chassis. The advantage of this topology over single-ended designs is that it exhibits lower noise, lower distortion, immunity from stray electronic fields and anomalies in the input signal from outside interference. This results in significant audible benefits including increased overall clarity and more pronounced differences between soft and loud passages. Internally, the ZX-7 and RX-7 both utilize two massive toroidal transformers and lots of filter capacitance to ensure rock-solid lowfrequency reproduction and ample power reserves.
The ZX-7 delivers 300 Watts per channel into 8 Ohms, while the RX-7 delivers 200 Watts per channel into 8 Ohms.
Equipped with gold-plated speaker output connectors, the rear panel includes balanced or unbalanced audio input via RCA and XLR connectors. A trigger input connector allows the amplifiers to
be controlled with associated components such as the MC-12HD or MC-8 Digital Controllers. The ZX-7 and RX-7 amplifiers include advanced optically coupled protection for each channel.
In order to receive the maximum peak performance from your Lexicon amplifier, please take a few minutes and completely read this manual. This important information will help you make certain that these Lexicon amplifiers are properly configured for operation with the rest of the equipment within your system.
PRODUCT REGISTRATION
Please register your new amplifier within 15 days of purchase. Register online at www.harmanspecialtygroup.com/registration or complete and return the product registration card attached to the back cover of this user guide. Retain the sales receipt as proof of warranty coverage.
1-2
ZX-7/RX-7 |
Getting Started |
HIGHLIGHTS
•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
•High-power supply voltage for extra headroom at the outputs
•Stable with mismatched, reactive, or unusual loads
•Thermal protection against overheating
•Speaker protection against DC and frequencies below 10Hz
•Protection against short circuits, device failures, mis-wiring, and internal faults
•Trigger input for power control from an external device
•RCA and XLR inputs
•Gold plated input and output connectors
•Rack-mount option available
•Noise elimination
•Delayed audio turn-on to eliminate noises from driving equipment
•Completely symmetrical circuit design which ensures optimal audio sonality
•Hefty power supplies with lots of filter capacity ensures rock-solid bass
•High damping factor (no output relays) ensure realistic, impressive bass transients
•Advanced protection circuitry ensures reliability under any sort of user abuse
INSTALLATION CONSIDERATIONS
To ensure optimal performance, pay particular attention to the instructions below and to other precautions that appear throughout this user guide.
DO be careful when moving the amplifier, as it is very heavy.
DO install the ZX-7/RX-7 on a solid, flat, level surface such as a table or shelf. The ZX-7/RX-7 can also be installed in a standard 19-inch equipment rack using an optional rack-mount kit available from an authorized Lexicon dealer.
DO select a dry, well-ventilated location out of direct sunlight.
DO NOT install the ZX-7/RX-7 on a surface that is unstable or unable to support all four feet.
DO NOT expose the ZX-7/RX-7 to high temperatures, humidity, steam, smoke, dampness or excessive dust. Avoid installing the amplifier near radiators and other heat-producing appliances.
DO NOT install the ZX-7/RX-7 near unshielded TV or FM antennas, cable TV decoders, or other RF-emitting devices that might cause interference.
DO NOT place the ZX-7/RX-7 on a thick rug or carpet, or cover the ventilation holes in the chassis, as this might prevent proper cooling.
DO NOT place the ZX-7/RX-7 on a windowsill or any location exposed to direct sunlight.
DO NOT stack the ZX-7/RX-7 directly above heat-producing equipment such as another power amplifier.
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