Krell Industries Digital-to-Analog Processor REFERENCE 64 manual

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INTRODUCTION Thank you for your purchase of the Krell REFERENCE 64 Digital-to-Analog Processor and welcome to the Krell family of audio components. Krell is dedicated to the development of technologically advanced components for the reproduction of digitally recorded music. The REFERENCE 64 redefines excel- lence in the Krell tradition of uncomprom[...]

INTRODUCTION This Owner’s Reference is designed to ensure the clear, trouble free installation of your REFERENCE 64 processor. Basic In- stallation, Operation and Quea{ion and Answer sections are provided. Should you have any questions or comments, please feel free to contact your authorized dealer or the KRELL staff for assistance. In the unlike[...]

TABLE OF CONTENTS 5 UNPACKING INSTRUCTIONS 6 ASSEMBLY INSTRUCTIONS 8 PLACEMENT 9 AC POWER CONSIDERATIONS 10 INPUT AND OUTPUT CONNECTIONS 19 PROCESSOR OPERATION 21 23 OPERATING INSTRUCTIONS QUESTIONS AND ANSWERS 26 SPECIFICATIONS 27 WARRANTY AND SERVICE INFORMATION PAGE 4[...]

UNPACKING 1. Open the box and remove the top layer of foam. The following items will now be visible: 1 REFERENCE 64 D/A PrOcessor 1 REFERENCE 64 Power Supply 1 Power Coupler 1 AC power cord 1 AT&T cable (1 mtr) 1 Packet containing the Owner’s Reference and Warranty Card NOTE: If any of these items are not included, please contact your authori[...]

ASSEMBLY ASSEMBLY INSTRUCTIONS 1. The processor is designed to sit directly on top of its companion Power Supply. There is a mechanical interlock built into the front feet of the processor and the chassis cover of the Power Supply. The units are secured together in the rear by the power coupler. 2. Place the Power Supply on a clear work surface. No[...]

ASSEMBLY 5. Locate the Processor/ Power Supply coupler assembly. This assembly can only be installed in one direction. The wider portion of the assembly with the mal~ connectors goes into the female connectors inthe center of the Power Supply. The female connec- tors on the power coupler go into the Processor’s male connectors. Once the coupler h[...]

PLACEMENT PLACEMENT Before you install the REFERENCE 64 into your system, we recommend that you follow these guidelines in choosing the location. This will facilitate a clean, trouble-free installation. 1. Although well shielded, the Processor should not be placed in close proximity to hum-sensitive components (ioe. preamps, turntables, tuners, etc[...]

AC POWER AC POWER CONSIDERATIONS NOTE: While the REFERENCE 64 has superb regulation and does not require a dedicated AC Circuit, we strongly advise against connections through extension cords or multiple AC adaptors. High quality 15 amp grounded AC strips are acceptable. High quality AC line conditioners or filters can be utilized if they are groun[...]

CONNECTIONS INPUT AND OUTPUT CONNECTIONS CAUTION: When making connections to this component or any other, make sure the power amplifier is OFF and the preamplifier is in the MUTE or STANDBY mode. 1. Connect the AC Mains cord to the back of the REFERENCE 64 Power Supply and plug the power cord into th AC Mains. CAUTION: Only plug the Power Supply in[...]

CONNECTIONS 2. Connect the REFERENCE 64 analog output to the line level input of your preamplifier. The REFERENCE 64 is equipped with two analog output configu- rations" Single-ended via RCA connectors and Balanced via XLR connectors. If your preamplifier has high level balanced inputs, we recommend the balanced outputs of the Processor be use[...]

CONNECTIONS 3. The Left and Right channel RCA outputs are labeled on the back panel. The balanced outputs are not labeled. The balanced connector closest to the Left RCA output is the left channel output and the connector closest to the RCA right output is the right balanced output. Care should be taken to insure that the channel orientation betwee[...]

CONNECTIONS Typical System Connection Diagram. Digital components can connect to different inputs than are shown. LOUDSPEAKERS KSA AMPLIFIER PREAMPLIFIER ~R L OUTPUT REFERENCE 64 I DAT DECK I SATELLITE RECEIVER il CD TRANSPORT DAT DECK PAGE 13[...]

CONNECTIONS - TAPE MONITOR INPUTS AND OUTPUTS 1 Digital only tape output: Intended for CD-R or DAT 2 Digital monitor inputs using auto selection system 1 AT&T normally active, priority over coax input 1 coax selected by default system The digital signal at the tape output is the active digital input signal selected. The use of external clock or[...]

CONNECTIONS DIGITAL SOURCE TO D/A CONVERTER INTERLINK CONSID- ERATIONS Care should be taken in selectihg the type of cable used to link the digital source to your Processor, We suggest the AT&T wide-band width fiber optic cable be used. The AT&T format has a bandwidth of approximately 50 MegaBit. This allows accurate transmission of the dig[...]

CONNECTIONS ’"’ ’" ,’ TIMESYNC TimeSync is a proprietary interlink system that enables a Krell CD transport and REFERENCE 64 to link and run on the CD transport clock. The TimeSync system can only be had on specific Krell transports. The DT- 10 and MD- 10 CD Transports come standard with the TimeSync output. The MD-20 can have the[...]

CONNECTIONS The operation of the Processor utilizing the TimeSync feature requires that the data input be selected first and then the be selected. The TimeSync and the DATA TimeSync input input selected must be from the same source. If the DATA and TimeSync are from different sources the processor will, after a very short period, go into a MUTE mod[...]

CONNECTIONS HOW TO CONNECT AT&T CABLES: a. Remove the plastic cover from the outside of the AT&T transmitter (located on Transport) and receiver (located on Pro- cessor). b. Locate the slot on the top of the AT&T receptacle. c. Locate the key on the top of the AT&T cable. d. Remove the plastic cap from both ends of the AT&T cabl[...]

OPERATION INPUT SELECT SWITCHING The REFERENCE 64 has multiple digital inputs. Each input has its own input switch and direct path to the digital Processor. When an input is selected, the corresponding LED will illuminate. ST XLR TOSH/C1 COAX 2 AT&T fiber optic input Balanced AES/EBU digital input Toshiba fiber optic input (Priority) and Coaxia[...]

OPERATION SOURCE AND MONITOR SELECTION The SOURCE button directs the signal from the Processor input selection section to the DAC and analog output stage. The source button must be depressed to listen to the selected input through the main audio system. The MONITOR button routes the output of the component connected to the digital tape loop input t[...]

OPERATION OPERATING INSTRUCTIONS 1. Select an input with the Input switch. Notice the Signal LED will illuminate when the digital ~ource is turned on and has linked with the Processor. Once this link is complete, the Processor is ready to pass a signal. If you are utilizing the TimeSync interlink, press the TimeSync button at this time. The TimeSyn[...]

OPERATION NOTE: While your REFERENCE 64 will perform beautifully from the moment you turn it on, it requires a minimum warm-up period of 8 hours before it begins to show its strongest sonic qualities. It will continue to improve over time. Discrete compo- nents are utilized in the analog output stage and the warm-up period allows them to reach ther[...]

QUESTIONS AND ANSWERS Q. My CD player has both fiber optic and coaxial outputs. Which one should I use? A. Given a choice, we prefer the’AT&T optical link due to its ability to completely isolate the grounds between the digital source component and the Processor. This minimizes the possibility of ground loops in the digital components. The AT[...]

QUESTIONS AND ANSWERS Q. I am not getting any sound through the Processor. What could be wrong? A. Most likely there has been a simple mistake in installation. Check all connections IN and OUT of the Processor. Is the digital source component powered? Check all power connections. Have you selected the correct source on your preamp? Check the front [...]

QUESTIONS AND ANSWERS Q. While listening to my REFERENCE 64 1 experience occasional periods of silence through my speakers. Is my Processor malfunc- tioning? A. Drop outs are caused by two primary reasons. First, drop outs can be caused by data corruption. Corruption in the data may be due to a poor input connection, damaged or dirty source materia[...]

SPECIFICATIONS FREQUENCY RESPONSE -. l dB at 4Hz & 20 KHz SIGNAL TO NOISE 100 dB A weighted DIGITAL-TO-ANALOG CONVERTER KRELL DAC Modules in custom THERMAL STABALIZATION SHIELD PROCESSING KRELL written software calculated through 4 custom configured Serial Motorola 560001 processors running at 34MHz, two per channel in series configuration LINE[...]

WARRANTY AND SERVICE WARRANTY AND SERVICE INFORMATION There are no user-serviceable ~arts inside the REFERENCE 64. The REFERENCE 64 has a limited warranty of five years parts and labor. Return freight is included in the warranty. The warranty period begins on the date of purchase and is activated with the return of the enclosed Warranty Card and a [...]

Krell Industries, Inc. ¯ 45 Connair Road, Orange CT 06477-3650 TEL 203-799-9954 FAX 203-891-2028 E-MAlL krell@krellonline, com WEBSITE http: //www.krellonline. com © 2001 Krell Industries, Inc. (REF649303)[...]