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Фрагмент инструкции
45 Connair Road Orange, CT 06477-3650 USA TEL 203-799-9954 FAX 203-891-2028 E-MAIL krell@krellonline.com WEBSITE This product complies with the EMC directive (89/336/EEC) and the low-voltage directive (73/23/EEC). The amplifier must be placed on a firm, level surface where it is not exposed to dripping or splashing. The ventilation grids on the top, bottom, and sides of the amplifier must be unobstructed at all times during operation. Do not place flammable material above or beneath the amplifier. Contact your authorized Krell dealer, distributor, or Krell before using any devices designed to alter or stabilize the AC power for the Showcase Amplifier. Before connecting the Showcase Amplifier, make sure the amplifier is turned off and any output device (such as a preamplifier) is in mute or stand-by mode. Make sure all cable terminations are of the highest quality and free from frayed ends, short circuits, or cold solder joints. Use only one input to each amplifier channel at a time. If the red LED flashes when the amplifier is in the stand-by mode, unplug the amplifier to reset the protection circuit. Check the loudspeakers and loudspeaker cables for potential short circuits before reconnecting the amplifier to your system. THERE ARE NO USER SERVICEABLE PARTS INSIDE THE PREAMPLIFIER Please contact your authorized Krell dealer, distributor, or Krell if you have any questions not addressed in this reference manual. This product is manufactured in the United States of America. Krell® is a registered trademark of Krell Industries, Inc., and is restricted for use by Krell Industries, Inc., its subsidiaries, and authorized agents. Krell Current Mode™ is a trademark of Krell Industries, Inc. All other trademarks and tradenames are registered to their respective companies. © 2002 by Krell Industries, Inc. All rights reserved P/N 306039 Contents Page INTRODUCTION 1 DEFINITION OF TERMS 2 UNPACKING 3 PLACEMENT 4 AC Power Guidelines 4 FRONT PANEL DESCRIPTION 6 BACK PANEL DESCRIPTION 8 CONNECTING THE SHOWCASE AMPLIFIER TO YOUR SYSTEM 10 Input and Output Connections 10 AMPLIFIER OPERATION 12 On/Off and Operation 12 TROUBLESHOOTING SYSTEM NOISE 13 QUESTIONS AND ANSWERS 14 WARRANTY 15 RETURN AUTHORIZATION PROCEDURE 16 SPECIFICATIONS 17 Krell Showcase Amplifier Illustrations Illustrations FIGURE 1 The Showcase Amplifier Front Panel 5 FIGURE 2 The Showcase Amplifier Back Panel 7 Krell Showcase Amplifier Introduction Thank you for your purchase of a Krell Showcase Amplifier. The Showcase Amplifier is a flexible design that delivers five, six, or seven channels of amplification. All three configurations include input and output connections for all seven channels. The amplifiers differ only by how many channels are housed within the amplifier. A Showcase 5 includes five amplifier channels, a Showcase 6 includes six amplifier channels, and a Showcase 7 includes seven amplifier channels. The Showcase 5 and Showcase 6 may be upgraded with additional channels, up to seven. The Showcase Amplifier has balanced and single-ended inputs for compatibility with other components. The amplifiers can be operated using the 12 VDC power on/off (12 V trigger) signals from other components. The Showcase Amplifier is versatile, fitting a variety of installations including rack-mounted and inside cabinetry. Please contact your Krell-authorized dealer or distributor for infor mation on upgrading your amplifier to six or seven channels. This reference manual contains important information on placement, installation, and operation of the Showcase Amplifier. Please read this information carefully. A thorough understanding of these details helps ensure satisfactory operation and long life for your Showcase Amplifier and related system components. Krell Showcase Amplifier Definition of Terms INPUT AND OUTPUT CONNECTIONS OPERATION TECHNOLOGY Following are the definitions of key terms used in your owner’s reference manual. Balanced A symmetrical input or output circuit that has equal impedance from both input terminals to a common ground reference point. The industry standard for professional and sound recording installations, balanced connections have 6 dB more gain than single-ended connections and allow the use of long interconnect cables. Balanced connections are less susceptible than single-ended connections to induced noise from the system or the environment. Single-ended A two-wire input or output circuit. Use care when using single- ended connections as the ground connection is made last and broken first. Turn the system off prior to making or breaking single- ended connections. Single-ended connections are not recommended for connections requiring l...
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