Krell Industries DT-10 User manual

DIGITAL
DT-IO
OWNER’S REFERENCE

INTRODUCTION
Thank you for your purchase of the KRELLDT- 10 CDTransport and welcome
to the KRELLfamily of audio components. KRELLis dedicated to the devel-
opment of technologically advanced components for the reproduction of digi-
tally recorded music. The DT- 10 redefines excellence in the KRELLtradition
of uncompromising performance through leading-edge technology.
The DT- 10 is the most flexible KRELLtransport to date. All of the keypad
processing software that controls the operation of the transport and laser as-
sembly has been written by KRELL.Because of this the DT- 10 delivers un-
surpassed sonic performance and interface possibilities. KRELLis one of
very few companies in the world that writes transport software. The DT- 10
utilizes the Philips CDM-4Pro transport mounted on a KRELLlinear bear-
ing based platforIn. In order for a drawer loading transport to perform to
KRELL’sexpectations, this type of rigid assembly was necessary. Whenfully
closed, the transport is mechanically rigid and isolated, free from external
stimuli. The disc is secured by a custom magnetic clamp. The clamp is very
light weight and will not effect critical disc speed. The magnetic structure of
the clamp is designed so it will not disturb the swing arm and laser assem-
bly as do many popular clamp designs.
The DT- 10 has several features new to KRELLtransports. This Owner’s Ref-
erence describes them in detail. All of these features and functions can be
controlled from the DT-1 O’s multi-function remote control. Along with the
transport functions, basic KRELLpreamplifier and amplifier functions are
now provided on the remote control.
PAGE 2

INTRODUCTION
This Owner’s Reference is designed to ensure the clear, trouble free instal-
lation of your DT- 10. Basic Installation, Operation and Question and Ans@er
sections are provided. Should you have any questions or comments, please
feel free to contact your authorized dealer or the KRELLstaff for assistance.
In the unlikely event that your DT-10 should require service, you 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 service, please consult
the Warranty and Service section of this Reference, Warranty Registration
Card, or an authorized KRELLDealer/Distributor.
PAGE 3

TABLE OF CONTENTS
5
6
7
8
9
l0
12
13
14
17
18
20
22
23
UNPACKING INSTRUCTIONS
PLACEMENT AND AC POWER CONSIDERATIONS
OUTPUT CONNECTIONS
DIGITAL INTERLINK CONSIDERATIONS
TIME SYNC
CONNECTING AT&T ST CABLES
OPERATING INSTRUCTIONS
DT-10 REMOTE PREAMP AND AMPLIFIER FUNCTIONS
COMPLETE DT-10 FEATURES AND FUNCTIONS
HOW TO WRITE A PROGRAM
HOW TO WRITE A DMS PROGRAM
QUESTIONS AND ANSWERS
SPECIFICATIONS
WARRANTYAND SERVICE INFORMATION
PAGE4

UNPACKING
1. Once the box has been open and top layer of foam removed, the followi.’ng
items will be visible:
DT- 10 CD TRANSPORT
DT- 10 Remote Control
AC power cord
AT&Tcable (1 mtr)
Packet containing the Owner’s Reference and Warranty Registration
Card
NOTE:If any of these items are not included, please contact your authorized
dealer immediately for assistance.
2. Carefully remove the Transport and accessories from the box. Removethe
protective plastic wrap from the Transport.
NOTE:Save all packing materials. If you must ship your DT-10 in the future,
repack the unit in its original packaging to prevent transit damage.
PAGE5

PLACEMENT
PLACEMENT
Before you install the DT- 10 into your system, we recommendthat you fol-
low these guidelines in choosing the location. This will facilitate a clean,
trouble-free installation.
1. Place the unit on a firm level surface away from excessive heat or running
water. Make sure there is enough room for the drawer to open completely.
2. Although well shielded, the DT- 10 should not be placed in close proxim-
ity to hum-sensitive components such as preamps, turntables, and tuners.
CDtransports can create interference and induce hum.
3. The DT-10 does not require additional mass coupling or isolation. Youmay
experiment with feet or cones as long as they do not permanently aff~ to the
chassis. Any unauthorized modifications to the electronics or chassis will
void the warranty.
AC POWER CONSIDERATIONS
NOTE:While the DT-10 has superb regulation and does not require a dedi-
cated ACcircuit, we strongly advise against connections through extension
cords or muitiple ACadapters. High quality 15 amp grounded ACstrips are
acceptable. High quality ACline conditioners or filters can be utilized if they
are grounded and meet or exceed the unit’s Power Supply rating of 60VA.
CAUTION:Do not remove or bypass the ground pin on the end of the AC
cord. This may cause RFI (radio frequency interference) to be induced into
your playback system.
PAGE 6

CONNECTIONS
OUTPUT CONNECTIONS
CAUTION:When making connections to this component or any other, make
sure the power amplifier is OFFand the preamplifier is in the MUTEor
STANDBY mode.
1. Connect the ACMains cord to the back of the DT-10 and plug the power
cord into the ACMains.
2. Connect the digital output of your DT- 10 CDtransport to the inputs of the
D/A Processor. The DT-10 is equipped with the following outputs: one co-
axial, one AT&Twide-bandwidth fiber optic, one TOSHfiber optic, and one
AES/EBU balanced output.
The DT- 10 is also equipped with Time Sync, which is used to lock the c!jocks
of the transport and D/A processor. For a complete description of Time Sync,
see page nine. If the TimeSync option is not being utilized, its ST connector
output can be used for a second AT&Tformat fiber optic output. To convert
the Time Sync Output to a standard output, follow the instructions below.
a. Removethe center top-plate from the DT- 10 with a T- 15 torx head wrench.
b. Locate the red slider switch labeled one on the rear right side of the ex-
posed channel.
c. Movethe switch up towards the back to the one position.
d. Reinstall the center top plate.
e. The Time Sync output can now be used for connection to any device with
an AT&T/ST format input.
Set-up is complete.
3. Once you have completed the necessary output connections, select the
corresponding input of your D/A processor. Whenthe DT-10 is selected, if
its a KRELLor has this function, the 44.1 KHzindicator on the D/Aprocessor
will be engaged. On some D/A processors the sampling frequency needs to
be selected.
PAGE 7

:CONNECTIONS
NOTE; If the DT-10 is on and the 44.1 KHz frequency indicator does not
engage, check to make sure the digital interconnect cable is secure at both
ends or is not in need of repair.
Care should be taken in selecting the type of cable used to link the DT-10
to your processor. We suggest using the AT&Twide-band width fiber optic
cable. The AT&Tformat has a bandwidth of approximately 50 MegaBit. This
allows accurate transmission of the digital bit stream without data corrup-
tion and proves to be sonically superior. If the AT&Tformat is not available,
a high quality quartz fiber optic (Toshiba format) link can work well. Using
a fiber optic interconnect reduces ground loop problems often associated with
quality audio systems.
If coaxial cable is used, it should be non-capacitive and have a bandwidth
in excess of 10MHzto prevent drop-out errors. For best resuits with coaxial
cable we recommend the AES/EBU balanced format. The AES/EBU format
is a + 5 volt balanced digital transmission. Because of the high voltage
balanced format, this system allows for accurate data transmission and has
great sonic advantages over standard single-ended coaxial or Tosh fiber optic
terminations. The AES/EBU coaxial cable must have two Conductors and a
shield for balanced termination.
[)AGE

CONNECTIONS
TIME SYNC
Time Sync is a proprietary interlink system that enables the DT-10 to link
with a KRELLD/A processor and serve as the master clock. This intercon-
nection virtually eliminates the possibility of jitter between the two compo-
nents. The Time Sync system is solely available on specific KRELLD/A pro-
cessors.
The use of the TIME SYNCinterlink requires that the D/A processor used
be a KRELL and equipped with the Time Sync/Special AT&T/ST input re-
ceiver. It also requires that the Time Sync output of the DT- 10 Transport be
connected to the Time Sync input of the D/A processor using an AT&T/ST
optics cable. The Time Sync is in addition to the connections used to carry
CD disc data.
NOTE: The use of the Time Sync feature does eliminate the jitter normally
encountered in the decoding of the digital data stream; however, the propri-
etary KRELL DATA RECOVERY AND JITYER REJECTION MODULE reduces
jitter to an almost immeasurable level. Time Sync provides an additional level
of jitter reduction. Because the transport and D/A processor clocks are
physically locked, there is no deviation in the data stream, thus eliminating
jitter.
Refer to the KRELLD/A Processor’s Owner’s Reference for Time Sync oper-
ating instructions.
PAGE 9

CONNECTIONS
HOWTO CONNECT AT&T CABLES: ~
a. Removethe plastic cover from the outside of the AT&Ttransmitter (located
on Transport) and receiver (located on Processor).
b. Locate the slot on the top of the AT&Treceptacle.
c. Locate the key on the top of the AT&Tcable.
d. Removethe plastic cap from both ends of the AT&Tcable.
e. Slide the cable connector into the AT&Treceptacle, with the key guided
into the designated slot.
f. Gently push the connector into place, depress the internal spring, and twist
the outer collar clockwise to secure the outer ring to the posts on ~he chas-
sis connector.
g. Use the same procedure for the transport and D/A Processor
PAGE 10

CONNECTIONS
Typical System
Connection
Diagram.
Digital components can
connect to different
inputs than are shown.
LOUDSPEAKERS
KSA AIVIPLIFIER
~R L
OUTPUT
REFERENCE
o DT-IO o
PAGE 11

OPERATION
The operating instructions for the DT-10are split into three different catego-
ries: Basic operation, Remote control operation, and complete DT-10 feature
and function operation. These divisions insure a thorough understanding of
DT- 10 operation
1. Press the Power button on the front panel or on the remote control. The
display section will now illuminate.
2. Press the Open/Close button on the tYont panel and the drawer will come
out. Place the compact disc, label side up, onto the drive spindle. Press the
Open/Close button again and the drawer will close.
3. Press the Play button on the front panel or remote control. The disc will
start playing from track 1. To select a different track you can press the track
forward {> ~ } or reverse { I <} button until you reach the desired track number
or punch the number of the desired track into the keypad on the front panel
or remote control, and then press Play.
4. To stop th~ disc press the Stop button. This button will also clear the pro-
gram memory_.
NOTE:The functions of the DT-10 are described in detail on page 14. in the
Features and Functions section.
REMOTE CONTROL OPERATION
The DT-10 comes equipped with a universal remote control from which
basic preamp, amplifier and complete transport functions can be con-
trolled. A brief description of the buttons and their functions is provided.
For more detailed instructions on the DT-10 functions, refer to the fea-
tures and functions section beginning on page 14. These functions for
the DT-10 can be controlled only from the remote control: Display, A/B,
Access, Dim, Random, and Intro. All other DT-10 functions can be con-
trolled from the front panel. Basic preamp and amplifier fanctions are
listed on page 13,
AGE 12

REMOTE CONTROL
fi~st forwmd
Ias~ reverse
index reverse
loop irlsetlion
display change
brief in~rodnctior~
track samples
preamp volume decrease
preamp phase reverse
AMP
3
PLAY
~........~o~ss
~
r~ <:~ VOL[~/- i~ P UT----~
~
/ nmplifier rneier display
_ amplifier pewer
..~ play
-. track forward
.~ plogram
.~Disc Management System
..... index advance
.... display dim
__ randomtrack play
--- preampinput select
~preamp mute
Amplifier Fu uction s
METER:Turns the Bias
Level Meter on or off.
POWER:Turns the ampli-
fier Onor Off.
l-’rea mplifier Fu nctions
VOL< AND> : Adjusts
the volume of the pream-
plifier. The > button in-
creases the listening level
and the < button de- ~
creases the listening level.
INPUT: Selects preamp
inputs. Each time the
button is pressed a differ-
ent input is selected.
Press this button until the
desired input, displayed
on the preamp front
panel, is selected.
PHASE:When pressed, changes the absolute output phase. When the
LEDon the front is illuminated the preamp is in 180 degree phase .mode.
MUTE:When pressed, no input signal can be passed through the pre-
amp. The Mute LEDon the preamp will illuminate. When pressed again.
signal can be passed.
PAGE 13

OPERATION
Battery Installation and Removal
NOTE:Batteries should be replaced when the functions from the remote
control become intermittent. The DT-10 universal remote uses two N size
1.5 volt batteries.
1. Removethe four torx screws from the remote control back.
2. Remove the backplate to expose the battery storage compartment
3. Replace batteries (refer to polarity drawing while inserting the
batteries)
4. Replace the back plate and insert the four torx screws.
COMPLETE DT-10 FEATURES AND FUNCTIONS
The DT-10 is an extremely flexible transport. Newcapabilities have been
added to standard functions which enhance the use of the DT- 10 as a ref-
erence device. Listed below are the functions which can be accessed from
both the front panel and remote control.
STOP:Stops the disc while playing. Erases all short term program memory.
Does not erase DMSdata.
PLAY:Starts the disc playing from track 1 or from a keypad selected track.
Begins DMSor standard track programming. Pressing the Play button during
a track will start that track again from the beginning.
~ <: Track reverse. Selects and begins playing the track previous to the cur-
rent track. Also scrolls backward through DMSor standard track program-
ming.
> I: Track forward. Selects and begins playing the track after the current
track. Also scrolls forward through DMSor standard track programming.
~ < I <: INDEXreverse. Selects the index number previous to the current index
number within a specific track
> I > I : INDEXforward. Selects the next index number within the current
track.
PAGE 14

.... - OPERATION
NOTE: Some discs do not have index numbers programmed within tracks.
Whenthe Index buttons are pressed the display will default to the current
track number.
<<: Fast Reverse. Fast scroll backward through program.
>>: Fast Forward. Fast scroll forward through program.
PAUSE:Temporarily stops play of current track. Does not effect DMSor
standard track programming. Second press resumes play at the same spot.
REPEAT:(REP on Remote) When pressed repeats the entire disc, DMS
standard track program. Press Stop or Repeat to cancel function. If repeat
is pressed while playing the disc, play will start from the beginning whenall
tracks are finished. ~J
KEYPADUSE: The direct access keypad makes track selection quick and
easy. For numbers 1-9 select the number of your choice directly and press
the Play button to start play, or follow the program selection sequence if you
are writing a program. For numbers above 9, punch the two digit number into
the keypad and press the Play button to start play, or follow the program
selection sequence if programming.
REMOTE ONLY FEATURES
The following functions can be activated only from the DT- 10 remote control.
RANDOM:Will play tracks in a non-selected order. Press the random but-
ton and the disc will begin play in a sequence other than the original. Press
a second time or Stop to resume normal play.
INTRO:Plays a short sample of each track on the disc. Press the Intro button
and it will play the beginning of each track. Press the stop button to resume
normal play.
DISPLAY:Shows the time remaining in the track playing or, when depressed,
showb the amount of total disc time remaining.
PAGE 15

OPEI &TION
DIM: Shuts off the display and function LEDs. Second press activates the
display and function LEDs.
A/B: The DT-10 can make a loop between two set times within a track. This
is helpful when you need to repeat a specific segment of a track.
To create an A/B loop:
Start play of track. Press A/Bto insert the start position. Press A/B again
to insert finish position. A/Bwill automatically begin. Press Stop to delete
A/B program.
ACCESS:The Access function gives you the ability to numerically select a
position within a specific track program. This is valuable when exact start
positions are critical.
To go to a specific time on a disc:
1. Press access. Twozeros will show on the display.
2. Enter a two digit track number, then press Program.
3. Enter a two digit minute number, then press Program.
4. Enter a two digit second number, then press Program. The track will be-
gin play at the designated time.
EXAMPLE:Here is a program sequence for Access number 02.01.11
1. Press Access
2. Press 02 then Program
3. Press 01 then Program
4. Press 11 then Program
Track 2 will begin play at 1 minute and 11 seconds into the piece.
NOTE:Whenentering an access number, remember not to exceed the track’s
playing time while programming. Whenthis occurs the DT- 10 will default to
the total disc playing time and your access number will not be acknowledged.
PAGE 16

OPERATION
PROGRAM:(PROGon Remote) Standard track programming gives you _the
ability to select a group of tracks, or one track, and play only that group or
track selected. This method of programming is short term and will be cleared
when you press the Stop button. Once a program is written, basic functions
like Pause, Repeat, Track forward, and Track reverse work within the pro-
gram. The program will stop once the last programmedtrack is played or the
Stop button is depressed. The program will continually play if the repeat
button is depressed. To temporarily stop play of current track press the
Pause button. Remember, Stop will erase the program.
S~ECL¢LNOTE: If while in the middle of standard or DMSprogramming
you get confused with the sequence, press the Stop button. This will clear
all programming in temporary memory. Should you have a mistakein a cor-
rectly programmed DMSprogram and want to change it, follow the "How to
erase a DMSprogram" section on page 19. Pressing the Stop button will clear
all standard track programming.
Howto write a Program:
1. Press the Program button on the front panel or remote control. The pro-
gram LEDwill be illuminated next to the display. This puts the machine in
Program mode.
2. Select the track you want first in the program. Youcan use the track ad-
vance and reverse buttons to select the track numbers or punch the num-
ber directly into the keypad.
3. After you select the track, press the Program button again. The track you
selected is now in program memory.
4. Repeat this sequence for each track you want in your program.
PAGE 17

OPERATION ......
EXAMPLE:Here is a sample program sequence
1. Press Program
2. Press 2, then Program
3. Press 4, then Program
4. Press 6, then Program
5. Press 8, then Program
Press Play and the program sequence 2, 4, 6, 8, will begin.
NOTE:While playing the program, the Track Advance, Track Reverse, Repeat,
and Pause functions work within the program.
5. To clear the program memory press the STOPbutton.
DMS:The Disc Management System (DMS) program allows a track program
you have written to be saved indefinitely in the DT-10’s memory.
CAUTION:While learning to program_DMS, please proceed slowly and fol-
low the sequence carefully. If the sequence is changed the DMSfunction will
appear to be malfunctioning.
How to write a DMSprogram:
1. Press the Program button on the front panel or remote control. The pro-
gram LEDwill be illuminated next to the display. This puts the machine in
the program mode.
2. Follow the standard program instructions as described above.
3. Once the Program is written, press, the DMSbutton on the front panel or
remote control. Press the Program button and the DMSLEDon the front
panel will illuminate. The DMSprogram is now complete.
PAGE 18

OPERATION
How to play a DMSprogram:
1, Insert the disc into the DT-10
2. Close the drawer. The DMSLEDwill illuminate indicating there is a DMS
programmed disc in the machine.
3. Press the DMSbutton on the front panel or remote control.
4. Press Play, the Program LEDon the front panel will illuminate and the
DMSprogram will begin.
NOTE:If the Program LEDis not illuminated, the DT-10 will not recognize
the DMSprogram and will play the disc as it normally would.
EXAMPLE:Here is a sample DMSprogram sequence
1. Press
2. Press
3. Press
4. Press
5. Press
6. Press
7. Press
Program
1 then press Program
3 then press Program
5 then press Program
7 then press Program
DMS
Program
The DMSprogram is now entered into the DT-1 O’s permanent memory.. To
play the program, press DMS,then Play. The DMSprogram sequence 1, 3,
5, 7, will begin.
How to erase a DMSprogram:
Once the disc is enclosed in the DT-10, press the DMSbutton and immedi-
ately press the Stop Button. The DMSLEDwill extinguish, indicating the
DMSprogram is erased.
PAGE 19

~UESTIONS AND ANSWERS
Q. MyD/A processor has both fiber optic and coaxial outputs. Which one
should I use?
A. Given a choice, we prefer the AT&Toptical link due to its ability to com-
pletely isolate the grounds between the digital source component and the
Processor. This minimizes the possibility of ground loops in the digital com-
ponents. The AT&Tformat also has the added benefit of substantially higher
bandwidth than coax or the standard fiber optic interface. If a coax cable
must be used, we suggest the AES/EBUbalanced format. This interconnec-
tion utilizes a + 5v digital format and has the additional benefit of balanced
termination.
Q. Will I damage my DT-10 if I leave the power ONall the time?
A. No it’s intended to be on at all times. The circuits perform more consis-
tently once they reach thermal equilibrium. The DT-10 draws less than 50
watts out of the ACmains socket.
NOTE:For the rprotection of your transport, we recommenddisconnecting the
ACcord from the wall outlet before any electrical storms or if you plan on
being away from home for prolonged periods of time.
Q. I have some very fine audiophile interconnect cable which has Superior
sonic characteristics. Can I use this for mycoaxial digital input?
A. You may experiment with any high quality cable. Note that most audio
interconnect cable is not designed to carry the ultra-high frequency informa-
tion of the digital bit stream.
NOTE:For the DT- 10, we recommend non-capacitive coaxial cable which has
a bandwidth in excess of 10MHzand excellent shielding propertie
s.
PAGE 20 ~