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Krell Industries 450Mcx manuel d'utilisation

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  • Page 1

    Instructions for Use Owner ’ s Reference THE LEADER IN AUDIO ENGINEERING Full Power Balanced X Series Power Amplifiers 700cx, 400cx, 300cx Stereo 750Mcx, 450Mcx, 350Mcx Monaural with Krell CAST II T echnology[...]

  • Page 2

    Full Power Balanced X Series Power Amplifiers 700cx, 400cx, 300cx Stereo 750Mcx, 450Mcx, 350Mcx Monaural with Krell CAST II T echnology v 02.0 Krell Industries, Inc. 45 Connair Road Orange, CT 06477-3650 USA TEL 203-799-9954 F AX 203-891-2028 E-MAIL krell@krellonline.com WEBSITE http://www .krellonline.com This product is manufactured in the United[...]

  • Page 3

    Page INTRODUCTION 1 DEFINITION OF TERMS 1 REVOLUTIONARY KRELL CAST and CAST II TECHNOLOGY 3 UNP ACKING 4 PLACEMENT 4 AC Power Guidelines 5 FRONT P ANEL DESCRIPTION 8 700cx, 400cx, and 300cx Stereo Power Amplifiers 8 750Mcx, 450Mcx, and 350Mcx Monaural Power Amplifiers 8 BACK P ANEL DESCRIPTION 1 1 700cx, 400cx, and 300cx Stereo Power Amplifiers 1 1[...]

  • Page 4

    Page FIGURE 1 Full Power Balanced Stereo Amplifier Front Panel 6 FIGURE 2 Full Power Balanced Monaural Amplifier Front Panel 7 FIGURE 3 Full Power Balanced Stereo Amplifier Back Panel 9 FIGURE 4 Full Power Balanced Monaural Amplifier Back Panel 10 iv Krell Full Power Balanced X Series Power Amplifiers Illustrations[...]

  • Page 5

    The Full Power Balanced X Series consists of three stereo amplifiers, the Full Power Bal- anced 700cx, 400cx, and 300cx Stereo Power Amplifiers and three monaural amplifiers, the Full Power Balanced 750Mcx, 450Mcx, and 350Mcx Monaural Power Amplifiers. Installa- tion, connection, and operation of all amplifiers in the Full Power Balanced series are[...]

  • Page 6

    2 Krell Full Powered Balanced X Series Power Amplifiers Definition of T erms, continued 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. T urn the system off prior to making or breaking single-ended connections. Single- ended connections are not rec[...]

  • Page 7

    Krell Full Power Balanced X Series Power Amplifiers 3 Current Audio Signal Transmission, termed CAST , is a revolutionary method of connecting analog audio components for unparalleled sonic performance. CAST circuitry , and the CAST circuitry update, Krell CAST II, combine innovative engineering with existing Krell Cur- rent Mode technology to crea[...]

  • Page 8

    4 Krell Full Power Balanced X Series Power Amplifiers T wo people are needed to remove the Full Power Balanced amplifier from its shipping box safely and easily . 1. Open the shipping box and remove the top layer of foam. Y ou see these items: 1 Full Power Balanced Amplifier 1 Packet containing the owner ’s reference manual and the warranty regis[...]

  • Page 9

    Krell Full Power Balanced X Series Power Amplifiers 5 AC POWER GUIDELINES The Full Power Balanced 300cx and 350Mcx amplifiers need to be operated from a dedicat- ed AC power line rated at a minimum of 15 amps. The Full Power Balanced 700cx, 750Mcx, 400cx, and 450Mcx amplifiers need to be operated from a dedicated AC power line rated at a minimum of[...]

  • Page 10

    FIGURE 1 FULL POWER BALANCED STEREO AMPLIFIER FRONT P ANEL 1 Power Stand-by LED 2 Bias LED 3 Power Button 4 Infrared Sensor 5 Krell CAST LED 6 Regulator LED 1 2 6 3 5 4 6 Krell Full Powered Balanced X Series Power Amplifiers[...]

  • Page 11

    FIGURE 2 FULL POWER BALANCED MONAURAL AMPLIFIER FRONT P ANEL 7 Power Stand-by LED 8 Bias LED 9 Power Button 10 Infrared Sensor 1 1 Krell CAST LED 12 Regulator LED 7 8 12 9 11 10 Krell Full Powered Balanced X Series Power Amplifiers 7[...]

  • Page 12

    8 Krell Full Power Balanced X Series Power Amplifiers The front panel accesses power on/stand-by and infrared sensor (remote control) functions. The power stand-by , bias, regulator , and Krell CAST LEDs, arranged in a triangle on the front panel above the power button, illuminate to indi- cate amplifier status. FULL POWER BALANCED 700cx, 400cx, AN[...]

  • Page 13

    FIGURE 3 FULL POWER BALANCED STEREO AMPLIFIER BACK P ANEL 13 Left and Right Speaker Binding Posts 14 Krell CAST Inputs 15 Back Panel Power Breaker Switch 16 Left and Right Balanced Inputs 17 Krell Link Out/In 18 AC Mains Power Cord 19 Handles 13 17 16 16 15 19 19 18 14 14 13 Krell Full Powered Balanced X Series Power Amplifiers 9[...]

  • Page 14

    FIGURE 4 FULL POWER BALANCED MONAURAL AMPLIFIER BACK P ANEL 20 Handle 21 Speaker Binding Posts 22 Krell CAST Input 23 Balanced Input 24 AC Mains Power Cord 25 Krell Link Out/In 26 Back Panel Power Breaker Switch 21 25 23 24 20 26 22 10 Krell Full Powered Balanced X Series Power Amplifiers[...]

  • Page 15

    Krell Full Power Balanced X Series Power Amplifiers 1 1 The back panel provides connections for all inputs and outputs, power on/off, and remote control links. The back panel also has handles that allow you to safely and easily move the amplifier . FULL POWER BALANCED 700cx, 400cx, AND 300cx STEREO POWER AMPLIFIERS See Figure 1 on page 6 13 Left an[...]

  • Page 16

    12 Krell Full Power Balanced X Series Power Amplifiers FULL POWER BALANCED 750Mcx, 450Mcx, AND 350Mcx MONAURAL POWER AMPLIFIERS See Figure 4 on page 10 20 Handle All Full Power Balanced monaural amplifiers are equipped with a handle, located beside the speaker binding posts, to help you easily and safely move the amplifier . 21 Speaker Binding Post[...]

  • Page 17

    Krell Full Power Balanced X Series Power Amplifiers 13 INPUT AND OUTPUT CONNECTIONS Krell recommends using its proprietary Krell CAST system for unparalleled sonic perfor- mance between the Full Power Balanced amplifiers and other CAST -equipped compo- nents and the KPS 25sc Krell Playback Sys- tem. Full Power Balanced amplifiers also offer bal- an[...]

  • Page 18

    14 Krell Full Power Balanced X Series Power Amplifiers 4. Connect the other end of the MIDI cable to the Krell Link in connector on the next com- ponent. T o link another component, connect a sec- ond MIDI cable to the Krell Link out con- nector on the back panel of the second component. Connect the remaining end of the MIDI cable to the Krell Link[...]

  • Page 19

    Krell Full Power Balanced X Series Power Amplifiers 15 Full Power Balanced amplifiers are easy to install and operate. However , it is important to exercise care during operation, due to the amplifiers ’ enormous power output. Switching between active sources (such as a CD player , tape monitor , or VCR) without muting the pre- amplifier output, [...]

  • Page 20

    16 Krell Full Power Balanced X Series Power Amplifiers Full Power Balanced amplifiers are compatible with the remote controls included with Krell pre- amplifiers, the Home Theater Standard 7.1, and the KPS 25sc Krell Playback System. Please contact your authorized Krell dealer , dis- tributor , or Krell to purchase a remote control for Full Power B[...]

  • Page 21

    Krell Full Power Balanced X Series Power Amplifiers 17 HOW TO TROUBLESHOOT SYSTEM NOISE AC grounding becomes critical when connect- ing high performance audio components. When you mix and match audio components, each with its own ground potential, a low frequency hum may occur in one or both speakers. This often occurs when introducing a new compo-[...]

  • Page 22

    AMPLIFIER CONDITION The output mutes during playback and the following LEDs illuminate: Power Stand-by , and Regulator Bias The amplifier switches to stand-by mode and the Power Stand-by LED illuminates The amplifier switches to stand-by at high volumes and the Power Stand-by LED illuminates The amplifier powers down completely and no LEDs illumina[...]

  • Page 23

    Krell Full Power Balanced X Series Power Amplifiers 19 Q. Should I leave my Full Power Balanced amplifier on at all times? A. For maximum amplifier performance, leave the back panel power breaker switch on at all times. This places the amplifier in stand-by mode. Full Power Balanced amplifiers are designed to be powered on and off from stand- by , [...]

  • Page 24

    This Krell product has a limited warranty of five years for parts and labor on circuitry . Should this product fail to per- form at any time during the warranty , Krell will repair it at no cost to the owner , except as set forth in this warranty . The warranty does not apply to damage caused by acts of God or nature. The warranty on this page shal[...]

  • Page 25

    Krell Full Power Balanced X Series Power Amplifiers 21 If you believe there is a problem with your com- ponent, please contact your dealer , distributor , or the Krell factory to discuss the problem before you return the component for repair . T o expedite service, you may wish to complete and e-mail the Service Request Form in the Service Section [...]

  • Page 26

    Specifications Full Power Balanced 300cx, 400cx, 700cx Stereo Amplifiers FPB 300cx FPB 400cx FPB 700cx FREQUENCY RESPONSE 20 Hz to 20 kHz 20 Hz to 20 kHz 20 Hz to 20 kHz +0 dB, -0.05 dB +0 dB, -0.05 dB +0 dB, -0.05 dB 0.1 Hz to 240 kHz 0.1 Hz to 240 kHz 0.1 Hz to 240 kHz +0 dB, -3 dB +0 dB, -3 dB +0 dB, -3 dB SIGNAL T O NOISE RA TIO 1 13 dB 1 17 dB[...]

  • Page 27

    Krell Full Power Balanced X Series Power Amplifiers 23 Specifications Full Power Balanced 350Mcx, 450Mcx, 750Mcx Monaural Amplifiers FPB 350Mc FPB 450Mc FPB 750Mc FREQUENCY RESPONSE 20 Hz to 20 kHz 20 Hz to 20 kHz 20 Hz to 20 kHz +0 dB, -0.05 dB +0 dB, -0.05 dB +0 dB, -0.05 dB 0.1 Hz to 240 kHz 0.1 Hz to 240 kHz 0.1 Hz to 240 kHz +0 dB, -3 dB +0 dB[...]

  • Page 28

    Krell Industries, Inc. 45 Connair Road Orange, CT 06477-3650 USA TEL 203-799-9954 F AX 203-891-2028 E-MAIL krell@krellonline.com WEB SITE http://www .krellonline.com Full Power Balanced X Series Power Amplifiers 700cx, 400cx, 300cx Stereo 750Mcx, 450Mcx, 350Mcx Monaural with Krell CAST II T echnology v 02.0[...]