Krell 350 mcx owners manual
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Krell Industries, Inc. 45 Connair Road Orange, CT 06477-3650 USA TEL 203-799-9954 FAX 203-891-2028 E-MAIL krell@krellonline.com WEB SITE http://www.krellonline.com This product complies with the EMC directive (89/336/EEC) and the low-voltage directive (73/23/EEC). The Full Power Balanced amplifier must be placed on a firm, level surface where it is not exposed to dripping or splashing. The ventilation grids on the top of the Full Power Balanced amplifier must be unob- structed at all times during operation. Do not place flammable material on top of or beneath the component. Before making connections to the Full Power Balanced amplifier, ensure that it is off and the preamplifier is in mute or stand-by mode. Make sure all cable termina- tions are of the highest quality and free from frayed ends, short circuits, or cold solder joints. The differential circuitry employed with Full Power Balanced amplifiers requires special attention when connecting speakers. Do not connect the negative speaker terminals together. Do not connect the negative speaker terminals to ground or attempt to bridge the left and right speaker binding posts of Full Power Balanced stereo amplifiers. Do not connect a Full Power Balanced amplifier to a speaker selector device that employs a common ground scheme, as it may short-circuit the amplifier output. THERE ARE NO USER SERVICEABLE PARTS INSIDE ANY KRELL PRODUCT. Please contact your authorized Krell dealer, distributor, or Krell if you have any ques- tions not addressed in this reference manual. ©2003 by Krell Industries, Inc. All rights reservedP/N 305976 Full Power Balanced X Series Power Amplifiers 700cx, 400cx, 300cx Stereo 750Mcx, 450Mcx, 350Mcx Monaural with Krell CAST II Technology Instructions for Use v 03.0 CONTACT INFORMATION WARNINGS 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. Sustained Plateau Bias III™ is a trademark of Krell Industries, Inc. and is a Krell technology based on U.S. Patent No. 5,331,291. CAST™, CAST II™, Krell Current Mode™, Krell Link™, and Krell Playback System™ are trademarks of Krell Industries, Inc. All other trademarks are registered to their respective companies.
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Contents Krell Full Power Balanced X Series Power Amplifiers iii Page INTRODUCTION 1 DEFINITION OF TERMS 2 REVOLUTIONARY KRELL CAST and CAST II TECHNOLOGY 4 UNPACKING 6 PLACEMENT 7 AC Power Guidelines 7 FRONT PANEL DESCRIPTION 8 700cx, 400cx, and 300cx Stereo Power Amplifiers 8 750Mcx, 450Mcx, and 350Mcx Monaural Power Amplifiers 8 BACK PANEL DESCRIPTION 10 700cx, 400cx, and 300cx Stereo Power Amplifiers 10 750Mcx, 450Mcx, and 350Mcx Monaural Power Amplifiers 10 CONNECTING THE FULL POWER BALANCED AMPLIFIER TO YOUR SYSTEM 13 Input and Output Connections 13 Krell Trigger Connections 14 DC Protection Circuitry 14 Using a Tube Preamplifier 15 AMPLIFIER OPERATION 16 On/Off and Stand-by Operation 16 Krell Trigger Operation 17 REMOTE CONTROL OPERATION 18 How to Turn Off the Amplifier LEDs 18 How to Turn On the Amplifier LEDs 18 How to Switch between Krell CAST and XLR Inputs 18 Using a Dedicated Wall Outlet and Switch 18 AMPLIFIER TROUBLESHOOTING 19 How to Troubleshoot System Noise 19 How to Evaluate Amplifier Operation 19 QUESTIONS AND ANSWERS 21 WARRANTY 23 RETURN AUTHORIZATION PROCEDURE 24 SPECIFICATIONS 25