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.
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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.
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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.
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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
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