Krell Industries SBP-32X User's Manual
Contents
1. KRE SBP 32X DIGITAL POWER O O ANALOG POWER O SOFTWARE BASED PROCESSOR mwn OWNER S REFERENCE A INTRODUCTION Welcome to the Krell family of audio components You have joined a select group of discriminating listeners who enjoy the finest in music reproduction Krell Digital is dedicated to the development of technologically advanced components for the reproduction of digitall recorded music These designs continue the Krell tradi tion of uncompromising performance through leading edge technology In the unlikely event that your SBP 32X should require service Mise will be pleased to know that it is backed by a comprehensive Customer Satisfaction policy and one of the most advanced service facilities in the industry For detailed information on the terms and conditions of ser vice please consult your warranty registration card or your authorized KRELL Distributor This Owner s Reference is divided into several sections each designed to perform a different function A Question and Answer section and a Technical Assistance Glossary are included where answers to common questions are provided Should you have any questions or suggestions EE feel free to contact your authorized dealer or the RELL staff for assistance B TABLE OF CONTENTS 2 FCC COMPLIANCE STATEMENT 3 UNPACKING AND ASSEMBLY 3 BASIC INSTALLATION AND CONNECTIONS 5 OPERATION 7 QUESTIONS AND ANSWERS 9 TECHNICAL ASSISTANCE2. all necessary switching Q Sometimes while nm to my DAT the 44 1kHz LED is illuminated I thought DAT used 48kHz Is my processor Mee one mE A Some Digital Audio Tape recorders can record and playback in either 44 1kHz or 48kHz depending on the source the tape was recorded from The SBP 32X s LED s are informing you of the frequency it is receiving and as a consequence the sampling frequency at which the tape was recorded in The Bn has been designed to be left on at all times ns S4IASNV CNV SNOLLSIN m Q am not Seting any sound through the processor A Most likely there has been a simple mistake in instal lation Check all connections IN and OUT from the rocessor Check all power connections Have you se ected the correct source on your preamp Check the front panel LED s for power supply stability If you still no sound turn off the power and contact your ealer Q I have some very fine audiophile interconnect cable which has superior sonic characteristics Can I use this for my coaxial digital input A You may experiment with any high quality cable Do note however that most audio interconnect cable 1s not designed to carry the ultra high frequency information of the digital bit stream NOTE For the SBP 32X we recommend non capacitive coaxial cable which has a bandwidth in excess of 10MHz and excellent shielding properties Q While listening to my SBP 32X I experience occa sional periods
3. GLOSSARY 11 SPECIFICATIONS 13 WARRANTY AND SERVICE INFORMATION es NOLLO IJIOVMLNI iwa ws C FCC COMPLIANCE STATEMENT WARNING Changes or modifications to this unit not expressly approved by the party responsible for compli ance could void the user s authority to operate the equip ment Note This equipment has been tested and found to com ply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interfer ence in a residential installation This equipment gener ates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television recep tion which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult your dealer or an experienced radio TV technician for help The user may find the following booklet am by the Federal Communications Com
4. a term referring to periods of silence during digital audio playback B DYNAMIC HEADROOM The ability of a component to correctly duplicate high speed high level transient signals 1n excess of those normally encountered in audio playback If a component does not have sufficient Dynamic Headroom it will either fall short of the actual intensity and accuracy of the transient or possibly distort it i FIBRE OPTIC An interconnecting link through which digital data is transmitted via a beam of light INSTRUCTION CYCLE A period of time in which a processor completes a single or series of operations OVERSAMPLING w E A method by which additional samples are plotted in between the original recorded samples in order to in og the time domain resolution of the playback wave orm UANTIZATION n e process by which analog music is converted into digital data RFI Radio frequency interference This equipment generates uses and can radiate radio frequency energy which can cause interference to radio communications SAMPLES A digital sample is a quantized coordinate representing a specific amplitude at a specific time Thousands of samples per second are quantized during recording to digitally represent the original music SAMPLING RATE 3 The frequency at which pond data is sampled in the recording process ex a Sampling Rate of 44 1 KHz which 1s used in recording CD s represents 44 100 quan tize
5. d samples per second I SPECIFICATIONS Outputs Analog Single ended via RCA Balanced via male XLR Inputs Digital 1 via female RCA connector industry standard fibre optic input auto between inputs defaults to fibre optic Processors 2 Motorola DSP 56001 one per channel DACSs 18 bit one for each channel individually trimmed Software WAVEFORM DUPLICATOR updatable in socketed EPROMs Dimensions 19 wide 14 25 deep 2 5 high with feet Weight 26 pounds in shipping carton 22 pounds without packing m SNOLLVOIdILOdHdS iwaw 11 J WARRANTY AND SERVICE INFORMATION There are no user serviceable parts inside the SBP 32X The SBP 32X has a limited warranty of five years parts and labor on electronic parts Return freight is included in the warranty The warranty period begins on the date of purchase and is activated with the return of the en closed Warranty Card and a copy of the Sales receipt Please return the warranty car after suc cessful installation and operation are completed The warranty for Krell products is valid only in the coun try to which they were originally shipped and at the factory If you think there are problems with your unit please contact your dealer distributor or the factory immediately Please do not return any unit to KRELL for repair with out first calling to discuss the problem and to obtain a Return Authorization number Freight to the factory or distributo
6. dwidth in excess of 10MHz to prevent drop out errors mend that it be a high quality quartz fibre cable An additional benefit of fibre optic cable is a reduction of ground loop problems that often occur in audio systems 5 Connect the ap ropriate OUTPUT of the SBP 32X to the line level IN of your preamplifier The red banded connector indicates the right channel and the white indicates the left Note If a fibre x cable is selected we strongly recom The SBP 32X is i decr with two output configura tions 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 used There are considerable sonic benefits associated with balanced operation NOTE both outputs can be used to simultaneously feed two different systems F OPERATION l Plug the processor s AC cord into the wall socket 2 Turn ON your digital signal source Whether it is CD DAT or Satellite 1s not important The following should occur in this particular sequence A The two LED s designating Digital and Analog power will illuminate simultaneously This 1s your assurance that the individual power supplies are operating and stable B B After a period of 5 to 20 seconds the digital input circuits will stabilize and the LED indicating the input source frequency will be illuminated NOTE The input source component must be turned ON
7. ersists 8 H TECHNICAL ASSISTANCE GLOSSARY The following glossary provides definitions or explana tions of key words and phrases encountered in the course of this manual w 32 0 KHz The samplirig frequency of Satellite broadcast 44 1 KHz The sampling frequency of Compact Discs 48 0 KHz The sampling frequency of Digital Audio Tape BIT The fundamental building block of digital information The term expressing the smallest part of a digital word is derived from the words BInary DigiT BOOT e Booting is a term loosely referring to initializing the startup sequence in a computer BYTE EL A EM of 8 bits The primary component in a digital word CLOCK SPEED The speed at which the processor operates usually ex pressed in MHz COAXIAL A type of cable design where a center conductor is sur rounded by an insulator which is then wrapped with a full metallic shield D A Digital to Analog conversion DAC Digital to Analog converter The device which converts the digital information into an analog signal for playback in your audio system DISCRETE In this text Discrete circuit design utilizes individual components 1 e FETS Transistors as to integrated circuits or op amps It is generally accepted that On executed discrete circuits are superior soni cally in performance to the less expensive ICS 9 Ad VSSO IO IVOINHOH L m DROP OUT KEEN In this usage drop out is
8. in order for the processor to indicate the input source frequency CAUTION Should you have any major deviation from this sequence do not attempt to play the unit Disconnect It prior to powering up any other components and contact your Krell dealer immediately 3 Be sure that your preamplifier s volume control is completely turned to the OFF lowest volume position 4 Turn ON your components remembering that the last component to be energized should be your amplifier The amplifier should only be turned ON after all other com ponents 1n the system have been on for at least two 2 minutes 5 Switch the Input selector of your preamp to the posi tion e to your chosen input connection for the X dd 6 You may now start playing your DAT CD or satellite 7 Slowly turn the volume control up to the lowest level you can hear Check to see that both channels are work ang correctly before advancing the volume mm NOILV 44dO mmm Note While your SBP 32X will perform beautifully from the moment you turn it on it requires a minimum warm up period of 8 hours before it will reach its full sonic potential Discrete components are utilized in the analog output stage and the warm up period allows them to reach thermal equilibrium n Your installation is now complete Should you have any further questions which are not covered in the remainder of this manual contact your authorized Krell dealer We wish you
9. ity to hum sensitive components a PREAMPS TURNTABLES TUNERS etc 2 As with any high quality component ensure that the vent openings in the chassis are free from obstruction allowing the processor to dissipate heat created by its highly regulated power supply and high bias class A output stage EP 3 Run the male end of the AC cord from the processor location to a nearby wall socket This will be easier to accomplish now as the component itself is not in the way Do not plug the AC cord into the wall socket at this time NOTE While the SBP 32X has superb regulation and does not require a dedicated AC circuit we strongly advise against any connections through extension cords or multiple AC adaptors High quality 15 amp grounded AC strips are acceptable i zu m NO IIVTIVISNI www n CAUTION Do not remove or bypass the ground pin on the end of the AC cord This may cause RFI radio fre quency interference to be induced into your playback system 4 Connect the Digital Output from a Krell CD Turntable or any digital source to the Digital Input on the back panel of your processor Your SBP 32X will accommo date digital input from either the coaxial or fibre optic outputs of any CD DAT or Satellite broadcast source Note Care should be taken in selecting the type of cable used to link the digital source to processor If co axial cable is to be used 1t should be non capacitive and have a ban
10. many hours of listening fulfillment Q My CD player has both fiber optic and coaxial out puts Which one should I use A Given a choice we prefer the optical link due to its ability to completely 1solate the grounds between the digital source component and the processor This mini mizes the possibility of ground loops in the digital com ponents Q I own both a CD and DAT player Do I have to change my cables every time I listen to a different digital source A No Your SBP 32X will accommodate both the fiber optic link and coaxial input Simply connect both sources using the separate inputs NOTE When the SBP 32X senses two live inputs simul taneously it will default to the fibre optic link Therefore when you wish to listen to the source linked with coaxial you must turn the other optically linked source off C Will I damage my SBP 32X if I leave the power ON all the time A No The Class A discrete analog circuits perform more consistently once they reach thermal equilibrium The SBP 32X draws less than 25 watts out of the AC mains socket NOTE For the protection of your processor we recom mend disconnecting the AC cord from the wall outlet before any electrical storms or if you plan on being away from your home for prolonged periods of time Q Do I have to switch the Sampling Frequency when I o between my CD and DAT No Your SBP 32X automatically senses the input frequency and does
11. mission helpful Television Interference Handbook This booklet is available from the U S Government Printing Office Washineton DC 20402 Stock No 004 000 004 50 7 WARNING The use of non shielded analog output cables and non shielded digital input cables if coax is used for the digital input fibre optic interconnect need not be shielded will invalidate the FCC Certification of this device and may cause interference levels which n the limits established by the FCC for this type of evice D UNPACKING AND ASSEMBLY 1 Open the box and remove the top layer of protective foam The following items will now be visible SBP 32X processor 1 AC power cord l dane et containing the Owners Reference and warranty car i Note If any of these items are not included please con tact your authorized dealer immediately for assistance Save all packing materials If you must ship your SBP 32X in the future repack the unit in its original packaging to prevent transit damage E BASIC INSTALLATION AND CONNECTIONS Before you install the SBP 32X into your system we recommend following these guidelines in choosing the location This will facilitate a clean trouble free installa tion BN ZEE 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 Although well shielded the processor should not be laced in close proxim
12. of silence through my speakers Is my processor malfunctioning A Drop outs can be caused by two primary reasons both of which have to do with the corruption of data received by the processor This corruption in the data may be due to a poor input connection damaged or dirty source material or interconnects which do not have a wide enough bandwidth The second item that causes the processor to reset 1s the presence of a transient spike on the incoming AC power line The processor is resetting all of its digital processing circuits so that it can be as sured that all its circuits are properly synchronized Try ee pr source material and check your connec tions If these are not the cause speak with your dealer about obtaining different cabling If you are using fibre optics and source material and connections are not the problem speak with your authorized dealer Q Since I installed the processor in my system I have a low level hum that increases as I turn up the volume There was no hum in my system until I added the proces sor Is the processor malfunctioning A The fact that there was no hum in your system until you added the processor indicates that you have a ground loop problem Often changing the interconnect to a fibre optic cable will eliminate this problem The way the digital processor and digital source are connected to the AC mains often can be the cause of grounding prob lems Consult your dealer or Krell if this hum p
13. r is your responsibility Return freight to you will be paid by the factory or distributor 13 es HOLAS ANV ALNVYUVA mw d iz KRELL DIGITAL INC P o MW KRELL DIGITAL INC 35 HIGGINS DRIVE MILFORD CT 06460 SALES 203 874 3139 FAX 203 878 8373 COPYRIGHT 199 KRELL DIGITAL INC SBP32X9105
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