DD-8 Power Amplifier 143120-1 - 5/11 User Guide
DD-8 Power Amplifiers 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 other apparatus (including amplifiers) that produce heat. 9.
DD-8 Power Amplifiers DECLARATION OF CONFORMITY Issued By: Harman International. 1718 W. Mishawaka Rd. Elkhart, IN 46517 U.S.A. FOR FIELD SERVICE QUESTIONS CALL: 1 800 691 4171 European Representative’s Name and Address: Andy Baker Cranborne House, Cranborne Rd. Potters Bar, Hertfordshire EN6 3JN United Kingdom Equipment Type: Power amplifier. Family Name: DD Series.
DD-8 Power Amplifiers Documentation Conventions This document contains general safety, installation, and operating instructions for the DD-8 Power Amplifier. It is important to read this user guide before attempting to use this product. 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.
DD-8 Power Amplifiers Getting Started Thank you for purchasing your new Lexicon DD-8 Multi-room Amplifier. The DD-8 features patented DriveCore™ technology, delivering unprecedented levels of power from an amazingly small and lightweight product. DriveCore takes more than 500 discrete components typically found in a switching amplifier and fuses them onto a single silicon chip about the size of a dime.
DD-8 Power Amplifiers Getting Started Installation Considerations To ensure optimal performance, pay particular attention to the instructions below and to other precautions that appear throughout this user guide. DO install the DD-8 on a solid, flat, level surface such as a table or shelf. The DD-8 can also be installed in a standard 19-inch equipment rack using the rack-mount ears included with the product. DO select a dry, well-ventilated location out of direct sunlight.
DD-8 Power Amplifiers Basic Operation Front Panel 1 2 1. Standby Button Activates and deactivates standby mode when the DD-8 amplifier is connected to AC power. When the DD-8 is connected to AC power, the standby button LED will glow RED indicating that the unit is in the standby mode. In this state, the power amplifier section is not activated and the unit consumes minimal AC power.
DD-8 Power Amplifiers Basic Operation Back Panel 2 1 5 3 4 6 8 7 9 10 1. Bus Output 7. Speaker Outputs 2. Bus Input 8. Signal Sense On/Off 3. Local Inputs 9. Power Save On/Off 4. Output Level Controls 10. Trigger In/Out 5. Stereo/Mono Selection 11. AC Main Power Connector 10 11 6.
DD-8 Power Amplifiers Basic Operation 3. Local Inputs Provides a line-level RCA connector input to feed a corresponding speaker-level output channel. When the DD-8 is used as a multi-zone amplifier, each channel can be provided with a dedicated input signal. The signals from this input will only be available on the corresponding speaker-level output. Local inputs are grouped and identified in pairs with the labels A, B, C and D and channel numbers 1-8 on the rear panel of the DD-8.
DD-8 Power Amplifiers Basic Operation 7. Speaker Outputs Provides connection for up to four pair of stereo speakers (eight speakers total) to the DD-8. Connection to speakers is provided via phoenix-type connectors that accept bare wire terminations. The connectors are grouped in pairs with one connector each for pair A, B, C and D. Each pair consists of four wire terminations: positive (+) and negative (–) for the Left channel and positive (+) and negative (–) for the Right channel.
DD-8 Power Amplifiers Basic Operation NOTE: It is possible to have a situation where Signal Sense cannot function if the Power Save feature is also used and has been activated. For example, Signal Sense will deactivate channels without signals after 30 minutes. If all channels are deactivated, Power Save will be enabled after an additional 30 minutes of no signal. During that additional 30 minutes, Signal Sense will continue to function and will activate any channels that receive an incoming audio signal.
DD-8 Power Amplifiers Basic Operation 11. AC Main Power Connector Provides an AC power connection to the DD-8 using the supplied power cord. After all audio and system connections have been made, connect the power cord to an AC power source. Be sure that any device connected to the remote trigger input is powered off when connecting the DD-8 power cord to an AC outlet.
DD-8 Power Amplifiers Troubleshooting and Maintenance Troubleshooting The amplifier does not power on. 1. Attempt to power on the amplifier with the front panel Standby/On button. 2. Examine the power cord to ensure a good connection between the rear panel AC input connector and the wall outlet. 3. Check the wall outlet. The Trigger Input is connected to an external device, but the amplifier does not power on and off with the external device. 1.
DD-8 Power Amplifiers Troubleshooting and Maintenance A humming sound is present in the audio. Audible hum, or a discernable low frequency noise is one of the most common problems within audio/video systems. This problem, even when the volume is at a low level, Is usually caused by a common problem known as a “ground loop”. A ground loop occurs when there is a difference in ground voltages between two or more components that are connected electrically.
DD-8 Power Amplifiers APPENDIX Specifications Specifications are subject to change without notice. Operation Manual Output Power: 125W RMS per channel into 8 ohms from 20Hz – 20kHz Frequency Response: 20Hz - 20kHz +0dB/–1.5dB Total Harmonic Distortion (THD): Less than 0.05% at full rated power 20Hz - 20kHz Signal-to-Noise Ratio: < –105dB below rated full power A-weighted Crosstalk: < –70dB @ 1kHz Input Sensitivity: 1.
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