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Krell Industries KCT Instructions For Use Manual

Current tunnel cast preamplifier
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KCT
Krell Current Tunnel
THE LEADER IN AUDIO ENGINEERING
CAST Preamplifier
Instructions for Use
Owner's Reference

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Summary of Contents for Krell Industries KCT

  • Page 1 Krell Current Tunnel THE LEADER IN AUDIO ENGINEERING CAST Preamplifier Instructions for Use Owner’s Reference...
  • Page 2 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.

  • Page 3: Table Of Contents

    QUICK START FRONT PANEL DESCRIPTION BACK PANEL DESCRIPTION REMOTE CONTROL DESCRIPTION Battery Installation and Removal CONNECTING THE KCT PREAMPLIFIER TO YOUR SYSTEM Input and Output Connections KRELL LINK CONNECTIONS AND OPERATION TAPE INPUT AND OUTPUT OPERATING THE KCT PREAMPLIFIER On/Off and Stand-by Operation...
  • Page 4 Krell Link Trigger Delay Setup Exit Menu QUESTIONS AND ANSWERS WARRANTY RETURN AUTHORIZATION PROCEDURE SPECIFICATIONS List of Illustrations Figure 1 The KCT Front Panel Figure 2 The KCT Back Panel Figure 3 The KCT Remote Control Page Krell Current Tunnel...

  • Page 5: Introduction

    Introduction Thank you for your purchase of the Krell Current Tunnel (KCT) CAST Preamplifier. The KCT features Krell Current Tunnel topology and Krell CAST technology, which work together to reproduce music with unparalleled sound quality. The KCT has dual zone capability for listening to music from different input devices at the same time, or listening to one input device while recording another.

  • Page 6: Input And Output Connections

    INPUT AND OUTPUT CONNECTIONS 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.

  • Page 7: Revolutionary Krell Cast Technology

    Revolutionary Krell CAST Technology Current Audio Signal Transmission, termed CAST, is a revolutionary method of connecting analog audio components for unparalleled sonic performance. Innovative engineering combines the new Krell CAST circuitry with existing Krell Current Mode technology to create entire CAST systems that reproduce music with incredible range, tonality, and precision.
  • Page 8 The Best Musical Performance When you operate a CAST system, you will hear significant improvements in every performance area: speed, precision, dynamic range, depth and width of the sound stage, transient impact, tonal balance, harmonic distortion, and more. The goal for CAST is the same company goal used for all Krell products.

  • Page 9: Unpacking

    Specifications, on page 37, for the dimensions of the KCT. The KCT requires at least two inches (5 cm) of clearance on each side and at least two inches (5 cm) of clearance above the component to provide adequate ventilation.

  • Page 10: Quick Start

    After initializing is complete, the KCT is in the stand-by mode. The red stand-by LED (2) illuminates. Operating the KCT Preamplifier After the KCT is connected to your system and to AC power, you can begin operation. Steps for basic operation follow: IMPORTANT Always mute or fully attenuate the preamplifier level when switching between active sources (such as a CD player, tape monitor, or VCR).
  • Page 11 Turn your system off if it will not be used for a long period of time. 1. Place the amplifiers in the stand-by mode. 2. Press the power button (1) or power key (32) to switch the KCT to the stand-by mode.

  • Page 13: Front Panel Description

    Use this button to switch the KCT between the stand-by and the operational modes. 2 Stand-by LED The red stand-by LED illuminates when the KCT is plugged into a standard AC wall receptacle, indicating that the KCT is ready to be switched to the operational mode.

  • Page 14: Menu Functions

    KCT. See Customizing the KCT Preamplifier, on page 26. Menu Functions 15 Menu Button Use the menu button to access menu options for customizing the KCT. The front panel display shows and submenu name. See Customizing the KCT MAIN MENU Preamplifier, on page 26.

  • Page 16: Back Panel Description

    The KCT is equipped with one pair of single-ended tape source inputs with RCA connectors. 20 C-1 and C-2 Left and Right CAST Inputs The KCT is equipped with two pairs of CAST inputs with 4-pin bayonet connectors, for use with Krell CAST-equipped input devices. Tape Output 21 Tape Left and Right Outputs The KCT is equipped with one pair of tape outputs with RCA connectors.
  • Page 17 KCT developer’s reference, “RS-232 Port: Sending Commands and Interpreting Data,” for more information. Phono Stage Connector 30 Phono Power The KCT is equipped with a phono power port, for connecting the KCT with a Krell KPE phono stage. Power 31 IEC Power Connector The IEC power connector is for use with the provided IEC standard 15 amp AC power cord.

  • Page 18: Figure 3 The Kct Remote Control

    Figure 3 The KCT Remote Control Power 32 Power Key Amplifier Functions 33 Amp Pwr Key 34 Amp Sel(ect) Key Preamplifier Functions Level Control 35 Mute Key 43 Bal(ance) Key 36 Phase Key 44 Level Keys 37 Main Zone Key...

  • Page 19: Remote Control Description

    Power 32 Power Key Use this key to switch the KCT between the stand-by and the operational modes. Amplifier Functions 33 Amp Pwr Key Use this key to activate Krell amplifiers connected to your system. The amp pwr key also activates the control component for amplifiers connected by Krell Link.
  • Page 20 See Tape Output Menu, on page 30. Menu Functions 41 Menu Key Use this key to access the menu options for customizing the KCT. The front panel display (13) shows and submenu name. See Customizing the KCT MAIN MENU Preamplifier, on page 26.
  • Page 21 Compact Disc Functions The compact disc keys on the KCT remote control are functional with all Krell compact disc players. 45 Pause Key Use this key to temporarily suspend playing the current compact disc track. To resume playing the track at the point pause was engaged, press pause again or press the play key (47).

  • Page 22: Connecting The Kct Preamplifier To Your System

    2. Connect the outputs of your source equipment to the appropriate CAST (20), balanced (17), single-ended (18) or tape (19) inputs on the KCT back panel. 3. Connect the appropriate main (22 or 23) and zone 2 (24 or 25) outputs on the KCT back panel to your amplifier(s).

  • Page 23: Krell Link Connections And Operation

    Krell Link Connections and Operation Krell Link in/out connectors on the KCT back panel allow you to synchronize remote control operation for systems that include multiple amplifiers and associated components. When the Krell Link in/out connectors are used, the remote capabilities of the linked components are controlled from one amplifier or preamplifier, called the control component.

  • Page 24: Tape Input And Output

    (40) to switch between the tape recorder output and the input source. 2. Use the tape output to create a processor loop, when the KCT is connected to a graphic equalizer or other ancillary equipment. To activate this function, connect the equipment to the KCT tape outputs (21) as described in the equipment manu- facturer’s manual.

  • Page 25: Operating The Kct Preamplifier

    Note The KCT automatically plays through the main zone until you select zone 2 operation. 3. To return the KCT to the stand-by mode, press the power button (1) or power key (32). Krell recommends leaving the KCT in the stand-by mode when it is not playing music.

  • Page 26: Main Zone And Zone 2 Operation

    1. Press the power button (1) or power key (32) to switch the KCT from the stand-by to the operational mode. The front panel display (13) shows the main zone is active, the currently selected input, and main zone volume level.
  • Page 27 Zone 2 Only 1. With the KCT in the stand-by mode, press the zone button (10) or Z2 key (38). The front panel display (13) shows zone 2 is active. 2. Press the input select key (39) to select the device you wish to play in zone 2. The KCT will switch to the operational mode and the device will play in zone 2 only.
  • Page 28 To stop recording: 1. Press the zone button (10) or Z2 key (38) to select zone 2. 2. Press the tape button (7) or key (40). Krell Current Tunnel...

  • Page 29: Troubleshooting System Noise

    When you mix and match high-performance audio components, each with its own ground potential, a low frequency hum may occur in one or both loudspeakers. If this happens when you place the KCT preamplifier into your system, follow these simple troubleshooting steps.

  • Page 30: Customizing The Kct Preamplifier

    Customizing the KCT Preamplifier The KCT preamplifier’s easy-to-use menu options allow you to select and set preferred operating options for balance, inputs, trims, Theater Throughput mode, display brightness, mute, trigger setup and delay, tape output, AC mains, remote programming, setup memory, and Krell Link. The instructions below follow the menu order on your KCT.

  • Page 31: Input Level Trim

    4. Use the level control knob (14) or level keys (44) to select the desired input from the list (S-1, B-1, C-1, tape, etc.). 5. Press the enter button (16) or key (42) to access the submenu. 6. Use the level control knob (14) or level keys (44) to scroll through the list of naming options (phono, aux, etc.).

  • Page 32: Theater (Throughput) Mode

    When you configure a KCT input for Theater Throughput, the KCT volume and balance controls are transferred to the audio/video surround sound processor, for integrated volume and balance management and ease of operation. As long as the KCT input is configured for Theater Throughput and connected to the audio/video surround sound processor’s main outputs, all system volume and balance adjustments are made...

  • Page 33: Brightness

    8. Repeat steps 4 through 6. 9. Press the menu button (15) or key (41) to exit the menu mode. BRIGHTNESS This option allows you to adjust the front panel display brightness. 1. Press the menu button (15) or key (41) to access the main menu. 2.

  • Page 34: Tape Output Menu

    (15) or key (41) to exit the menu mode. AC MAINS MENU This option allows the KCT to go directly from off to the operational mode and bypass the stand-by mode. 1. Press the menu button (15) or key (41) to access the main menu.

  • Page 35: Program Remote Menu

    PROGRAM REMOTE MENU This option allows the KCT to send its remote control commands to a learning or programmable remote control. Note You must place the programmable remote in front of the KCT infrared sensor to send remote control commands.

  • Page 36: Setup Memory

    WAIT display shows KRELL KCT 6. Press the power button (1) or key (32) to return the KCT to the operational mode. The settings you selected are stored. KRELL LINK This option allows you to customize the operation of the KCT and Krell amplifiers connected with Krell Link.

  • Page 37: Trigger Delay Setup

    TRIGGER DELAY SETUP This option allows you to customize the number of seconds (from 0 to 5) before a trigger activates. 1. Press the menu button (15) or key (41) to access the main menu. 2. Use the level control knob (14) or level keys (44) to select 3.

  • Page 38: Questions And Answers

    2. Q. When I select the B-1 input on the KCT, one channel seems to have less gain than the other does. Is something wrong? A.

  • Page 39: Warranty

    Warranty To register your product for warranty benefits, please complete and return the Warranty Registration Card enclosed in the shipping box within 15 days of purchase. Thank you. Krell Current Tunnel This Krell product has a limited warranty of five years for parts and labor on circuitry. Should this product fail to perform at any time during the warranty, Krell will repair it at no cost to the owner, except as set forth in this warranty.

  • Page 40: Return Authorization Procedure

    To purchase additional packaging, please contact your authorized HOW TO PURCHASE Krell dealer, distributor, or the Krell Service Department for assis- ADDITIONAL PACKING tance. SERIAL NUMBER Your KCT product serial number is: http://www.krellonline.com 203-799-9954 Monday-Friday, 9:00 am to 5:00 pm EST 203-799-9796 E-MAIL service@krellonline.com...

  • Page 41: Specifications

    Specifications Inputs 2 pr. CAST (Lemo) 2 pr. Balanced (XLR) 3 pr. Single-ended (RCA) Main Outputs 2 pr. CAST (Lemo) 1 pr. Balanced (XLR) 1 pr. Single-ended (RCA) Zone 2 Outputs 1 pr. Balanced (XLR) 1 pr. Single-ended (RCA) Tape Loop 1 pr.
  • Page 42 Frequency Response 0.4 Hz-220 kHz 0.1 dB (Main Zone) 0.1 Hz-1.5 MHz 3 dB (Main Zone) 0.9 Hz-100 kHz 0.1 dB (Zone 2) 0.4 Hz-400 kHz 3 dB (Zone 2) THD+Noise <0.005% 20 Hz-20 kHz Balanced or Single-ended <0.004% 20 Hz-20 kHz CAST Residual Noise <-95 dB, wideband, unweighted <-109 dB, “A”-weighted...
  • Page 44 Krell Industries, Inc. 45 Connair Road Krell Current Tunnel Orange, CT 06477-3650 USA CAST Preamplifier TEL 203-799-9954, FAX 203-891-2028 E-MAIL krell@krellonline.com v 01.0 WEBSITE http://www.krellonline.com...

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