Krell Industries KPS 25sc User manual

KPS25sc
Krell Playback System
with Krell CASTTechnology
Instructions for Use
Owner’s Reference

KPS25sc
Krell PlaybackSystem
with Krell CAST
Technology
v 00.1
Krell Industries,Inc.
45 Connair Road
Orange, CT 06477-3650 USA
TEL [phone]
FAX[phone]
E-MAILkrell @krellonline.com
WEBSITEhttp://www.krellonline.com
This product complieswith the EMCdirective (89/336/EEC)andthe low-voltage directive (73/23/EEC).
WARNINGS
TheKPS25scmustbe placedona firm. level surface whereit is not exposedto dripping or splashing.
Donot removeor bypassthe groundpin on the end of the ACpowercord. This can causeradio frequency
interference (RFI) to beintroduced into your playbacksystem.Operatethe KPS25sconly with the power
cordsupplied.
Theventilation grids onthe top of the KPS25scmustbeunobstructedat all timesduring operation. Donot
place flammablematerial ontop of or beneaththe component.
Turn off all systems’ powerbefore connectingthe KPS25scto anycomponent.Makesure all cable termina-
tions areof thehighestquality, free fromfrayedends,short circuits, or coldsolderjoints.
Connectingnon-CASTcomponentsto CASTinputs or outputs can damageyour equipmentandvoid your war-
ranty.
Donot attemptto changeCASTcableterminations or CASTinputs or outputs to RCAor XLRconnectors.It is
electrically impossibleto convertCASTinput or output connectionsfor balancedor single-endedvoltageoper-
ation.
THEREARE NO USERSERVICEABLEPARTSINSIDE ANY KRELL PRODUCT.
PleasecontactyourauthorizedKrell dealer, distributor, or Krell if youhaveanyquestionsnot addressedin
this referencemanual.
(-~--~equipped
Thisproductis manufacturedin theUnitedStatesof America.Krell* is aregisteredtrademarkof Krell Industries.Inc.. andis restrictedfor usebyKrell
Industries.inc.. its subsidiaries,andauthorizedagents.Krell PlaybackSystem
TM
is atrademarkof Krell Industries.Inc. Krell CASTis apatentpendingof
Krell Industries,inc. KrellLink
TM
is atrademarkof KrellIndustries.Inc. [-~----~-I, HDCD
’~. HighDefinitionCompatibleDigital*andPacificMicrosonics TM
areeither registeredtrademarksor trademarksof Pacific Microson~cs.Inc. in the UnitedStatesand/orothercountries.HDCDsystemmanufactured
underlicensefromPacific Microsonics.Inc. Thisproductis coveredby oneor moreof the following: In the USA:5.479.168.5,638,074,5.640.161.
5,808,574.5,838,274,5.854,600,5.864,311,5,872,531,andin Australia: 669114,Otherpatentspending.TosLink
TM is a trademarkof Toshiba
Corporation.All othertrademarksandtradenamesareregisteredto their respectivecompanies.
©2000byKretlIndustries,Inc.All rightsreserved P/N 303963

Contents
INTRODUCTION
DEFINITION OF TERMS
REVOLUTIONARYKRELL CAST
TECHNOLOGY
UNPACKING
PLACEMENT
ACPowerGuidelines
QUICK START
FactoryDefault Settings
Input and OutputConnections
Power On
ToPlay a CompactDisc
ToPlay AnotherInput Source
INSTALLING THE ACRYLIC COVER
Attachingthe Acrylic Cover
Connectingthe Flex Foil Cable
Adjusting the CoverClosing Speed
FRONTPANEL DESCRIPTION
BACKPANEL DESCRIPTION
REMOTECONTROLDESCRIPTION
Battery Installation andRemoval
Tabletop RemoteControl
CONNECTINGTHE KPS 25sc
TO YOURSYSTEM
Input andOutput Connections
Power On
FactoryDefault Settings
KRELLLINK CONNECTIONSAND OPERATION
ConnectingComponentsThroughKrell Link
Krell Link Operation
TAPE INPUT AND OUTPUT
Page
1
1
3
4
4
4
5
5
5
6
6
6
9
9
10
10
12
15
18
18
18
22
22
23
23
24
24
24
25
Krell KPS25sc iii

Contents,continued
OPERATINGYOURKPS 25sc
To Play a CompactDisc
Howto Write a Program
Howto Create an A/B Loop
ToPlay AnotherInput Source
CUSTOMIZING CONFIGURATIONS
Changethe Cover Operation Mode
Changethe Shutter Operation Mode
Configuring for TheaterThroughput
Amplifier Control Options
Adjust MenuDisplay Brightness
Assign CustomNamesto Inputs
Changean Input’s VolumeTrim
Changethe VolumeControl Sensitivity
ReturnAll Settings to FactoryDefaults
WARRANTY
RETURNAUTHORIZATION
PROCEDURE
SPECIFICATIONS
Page
26
26
26
27
27
27
27
28
28
29
30
30
31
31
31
32
33
Back Cover
IllustrationsFIGURE1
FIGURE2
FIGURE3
FIGURE4
FIGURE5
Attaching the KPS25scAcrylic Cover
Connectingthe KPS25sc Flex Foil Cable
TheKPS25sc Front Panel
The KPS25sc Back Panel
The KPS25sc Tabletop
and HandheldRemoteControls
Page
7
8
11
14
17
iv Krell KPS25sc

Introduction Definition of Terms
Thankyou for your purchase of the KPS25sc
Krell PlaybackSystem.Theintegrated design
of the KPS25sc incorporates a compactdisc
transport, a digital-to-analog processor,anda
high resolution preamplifier in onestandalone
unit. Thecompactdisc transport design pro-
vides high position accuracy and eliminates
servo bounceandvibration. Anacrylic cover
protects the integrity of the compactdisc data.
Theanalogpreamplifier features exceptionally
wide bandwidthwith extremely low noise, and
the digital-to-analog converter makesthe
KPS25sccompatiblewith nearly every digital
audio source. Menufeatures allow customizing
of cover operation and color, menudisplay
brightness, input naming,andvolumecontrols
for optimumfunctioning andeaseof use.
TheKPS25sc provides a variety of mainout-
puts: Krell CASTvariable, balancedandsingle-
endedvariable, andbalancedandsingle-ended
fixed level for connectingto a secondsystem.
TheKPS.25sc canbe connectedto multi-room
switchers that operate whole-housemusicsys-
tems.TheTheaterThroughputfeature simplifies
integration of an audio/video surround sound
processor with the KPS25sc. Tworemotecon-
trol unitsmafull-function tabletop remotewith
direct accesscapability, anda simplified hand-
held remote~provide complete and convenient
remotecontrol operation.
This owner’sreference manualcontains impor-
tant informationonplacement,installation, and
operation of the KPS25sc. Please read this
information carefully. A thoroughunderstanding
of thesedetails will help ensuresatisfactory
operation andlong life for your KPS25scand
related systemcomponents.
Followingare the definitions of keytermsused
in your owner’sreference manual.
CONFIGURATIONS
Krell Link
A methodof synchronizingremotecontrol oper-
ation for Krell systemsthat includemultiplepre-
amplifiers, amplifiers, andassociated compo-
nents. WhenKrell Link in/out connectionsare
used,the remotecapabilities of the linked com-
ponents are controlled from one component,
called the control component.Thelinked com-
ponents respond to stand-by and operational
modecommandsfrom the control component
via MIDIcables.
Theater Throughput
Theater Throughputis a Krell configuration
option that allows the signal from a surround
preamp/processorto passthrough a Krell pre-
amplifier or integratedamplifier with nogain, for
integrated volumeand balance managementof
Krell hometheater systems.
INPUT ANDOUTPUT
CONNECTIONS
Balanced
Asymmetricalinput or output circuit that has
equalimpedancefromboth input terminals to a
commonground reference point. Theindustry
standardfor professional andsoundrecording
installations, balancedconnectionshave6 dB
moregain than single-ended connections and
allow the use of long interconnect cables.
Balancedconnections are completely immune
to inducednoise from the systemor the envi-
ronment.
Krell KPS25sc 1

Definitionof Terms,continued
Krell Current Audio Signal Transmission
(CAST)
Aproprietary Krell circuit technologyfor con-
necting analogcomponents,in whichthe audio
waveformis transmitted betweencomponents
in the current rather than voltage domain.The
speedand bandwidth provided by Krell CAST
yields accurate, realistic musicreproduction.
Krell componentsconnectedvia CASTperform
asif theyareall partof asinglecircuit.
Single-ended
A two-wire input or output circuit. Usecare
whenusing single-ended connections as the
ground connection is madelast and broken
first. Turn the systemoff prior to makingor
breaking single-ended connections. Single-
ended connections are not recommendedfor
connectionsrequiring long cable runs.
OPERATION
Off
Whenthe powerbutton on the front panel is
pressedandthe blue powerLEDturns off, the
componentis off.
Operational Mode
Whenthe powerbutton on the front panel is
pressed and the blue powerLEDilluminates,
the componentis in the operational modeand
readyto play music.
Stand-by Mode
A low powerconsumptionstatus that keepsthe
audioandregulatorcircuits at idle. Krell recom-
mendsleaving the componentin the stand-by
modewhenit is not playing music.
TECHNOLOGY
Krell Current Mode
Aproprietary Krell circuit topologyin whichthe
audio gain stages of a componentoperate in
the current rather than voltage domain.This
uniq uetechnologyprovides the componentwith
exceptional speedand a wide bandwidth.
Krell HEAT
The Krell term HEAT, or High End Audio
Theater, ~s a design application incorporated
into Krell componentsto enhancemulti-channel
homeentertainment systems.A Krell HEATsys-
temis an integrated hometheater systemcon-
sisting of a state-of-the-art Krell pre-amp
processorandmatchingamplifiers that repro-
duce two channel and multi-channel sources
with audiophilesoundquality, placingthe audi-
encein the middleof a lifelike environment.
2Krell KPS25sc

Revolutionary Krell CAST
Technology
Current Audio Signal Transmission, termed
CAST,is a revolutionary methodof connecting
analog audio componentsfor unparalleled
sonic performance. Innovative engineering
combinesthe newKrell CASTcircuitry with
existing Krell Current Modetechnologyto cre-
ate entire CASTsystemsthat reproducemusic
with incrediblerange,tonality, andprecision.
Voltage Signal Transmissionand the
Traditional AudioSystem
Traditionally, signal is transmittedin the voltage
domainbetweentwo components.In an audio
system,eachcomponentis a discrete entity with
uniquecharacteristics that act uponthe musical
signal independently. Each component is
unawareof the other cornponentsin the system.
Thecables that connect the componentseach
havetheir ownelectrical characteristics, which
affect thesonicpresentationof the entire system.
CAST: A NewApproach
CASTcircuitry recognizessignal transmitted in
the current domaininstead of the voltage
domainbetweeneach component.CASTtrans-
mission unifies the individual componentsand
their interconnectsinto an electrically linked
whole.Thesonic presentationof the entire sys-
temremainsintact.
CASTBasics
Here’s how a CASTaudio system works.
Internally, each CASTsource transfers, or
amplifies, current usingKrell CurrentModecir-
cuitry. Thiscurrent signal is then outputusing
CASTcircuitry. Whenthe signal is received by
a CASTinput, Krell Current Modecircuitry
again takes over until the signal reachesthe
loudspeaker.Bymaintainingthe musicalsignal
in the current domainfrombeginningto end, an
entire CASTsystembehavesas if it is onecom-
ponent.WithCAST,anomaliesof signal transmis-
sion betweencomponentsare eliminated. Cable
impedancesandtheir effects on the transmitted
signal arenon-existent.
HowCASTand Krell Current ModeInteract
WhileCASTis a newmethodof transferring the
musical signal betweencomponents,its orig n
stemsfrom Krell Current Mode,the technology
developedto transfer the musicalsignal within
a component. CASTcombined with Krell
Current Modetakes circuitry signal transmis-
sion to the next evolutionarylevel. In essence,
Krell CurrentModemaintainsthe integrity of the
signal within the componentand CASTpre-
serves the transmitted signal betweencompo-
nents. Together, CASTand Krell Current Mode
technologies unify separate Krell components
into asingleglobalcircuit.
CASTCable Construction
A CASTsystem uses cables manufactured by
Krell and other manufacturers specially
licensedby Krell. Thin andflexible CASTcables
are constructedwith the samebuild quality as
other Krell products and are aesthetically
matchedto the componentsthat Krell manufac-
tures. Anall-metal bodyandlocking connectors
with gold contacts are part of the standardno-
compromisespecification developedfor every
CASTcable made.
The Best Musical Performance
Whenyou operate a CASTsystem, you will
hearsignificant improvementsin every perfor-
mancearea: speed, precision, dynamicrange,
depth andwidth of the soundstage, transient
impact, tonal balance,harmonicdistortion, and
mor.e. Thegoal for CASTis the samecompany
goalusedfor all Krell products.Krell strives for
the delivery of the best performanceof a musi-
cal eventfor you, using the full expressionof
technologyto date.
Krell KPS25sc

Unpacking Placement
1. Openthe shipping box and removethe top
layer of foam.Youseetheseitems:
1 KPS 25sc
1 acrylic cover in velvet pouch
1 KPS25sc tabletop remote control
1 KPS25sc handheld remote control
2 packagesof AAA-size1.5 Volt batteries
(4 for tabletopremotecontrol, 2 for
handheldremotecontrol)
1 compact disc clamp
1 IEC connector (ACPower) cord
1 12 VDC(12 V trigger) cable
1T-10Torxwrench(for remotecontrol
battery installation andremoval)
1 cleaningkit for the acrylic cover
1 packetcontaining the owner’s
reference manualandthe warranty
registration card
2. Carefully removethe unit andaccessories
from the shipping box. Removethe foam
endcapsandprotective plastic wrapfrom
the KPS25sc.
Notes
If anyof these items are not included in the
shipping box, please contact your authorized
Krell dealer,distributor, or Krell for assistance.
Saveall packing materials. If you ship your
KPS25scin the future, repackthe unit in its
original packagingto prevent transit damage.
See Return Authorization Procedure, on
page33, for moreinformation.
Beforeyouinstall the KPS25scinto your sys-
tem, reviewthe following guidelines to properly
place your component.This will facilitate a
clean, trouble-free installation. TheKPS25sc
doesnot require a special rack or cabinet for
installation. Forthe dimensionsof the KPS25sc,
seeSpecifications, onthe backcover.
TheKPS25sc requires at least two inches (5
cm)of clearanceoneachsideto providefor ade-
quateventilation andat least 20inches(50cm)
of clearanceabovethe componentto allow for
the operationof the acrylic cover.Installations
inside cabinetrymayneedextra ventilation.
Note
The KPS25sc incorporates an advancedsus-
pensionsystemanddoesnot require addition-
al masscoupling or isolation. Youmayexperi-
mentwith feet or conesas longas they are not
permanentlyaffixed to the unit. Anyunautho-
rizedmodificationsto theunit or electronicswill
void the warranty.
IMPORTANT
Donot attach enhancementaccessories such
as rings, mats, or dampersto individual com-
pact discs. Theseaccessories mayinterfere
with the compactdisc transport, resulting in
erratic playbackand/orpoorsound.
AC POWERGUIDELINES
TheKPS25sc has superb regulation and does
not require a dedicatedACcircuit. Avoidconnec-
tions through extension cords or multiple AC
adapters. High quality 15 ampgrounded AC
strips are acceptable.Highquality ACline con-
ditioners or filters canbe usedif they are
groundedand meetor exceedthe unit’s power
supplyrating of 100VA.
4Krell KPS25sc

QuickStart
Toaccessthe full arrayof available featuresfor
the KPS25sc, please read the entire KPS25sc
owner’s reference manual. The abbreviated
proceduresin this QuickStart sectionwill allow
you to set up your KPS25sc system quickly
andenjoyits basic features beforeyoureadthe
entire manual.Thefollowing paragraphsoutline
quickstart procedures.For additional informa-
tion see Connectingthe KPS25sc to Your
System,on page22.
FACTORYDEFAULTSETTINGS
TheKPS25scis shippedwith thesedefault set-
tings:
Thecover operation modeis set for auto. The
cover mustbe downfor compactdisc playback
to begin.
Theshutter operation modeis shippedset for
auto. Thecover automatically becomesopaque
whenyou play a compact disc and becomes
clear whenplaybackstops.
All variable andfixed outputsareactive.
IMPORTANT
Youmustinstall the acrylic cover before you
useyour KPS25sc. SeeInstalling the Acrylic
Cover, on page9.
INPUT ANDOUTPUT
CONNECTIONS
SeeFigure 3 on page11 andFigure 4 on page
14. Numbersin parentheses refer to figure
labels.
IMPORTANT
Connecting non-CAST components to CAST
inputs or outputs can damageyour equipment
andvoid your warranty.
Donot attempt to changeCASTcable termina-
tions or CASTinputs or outputs to RCAor XLR
connectors.It is electrically impossibleto con-
vert CASTinput or output connectionsfor bal-
ancedor single-endedvoltage operation.
Please read the Warranty, on page 32, to
understand the warranty limitations of the
KPS25sc.
1. Makesure all power sources and compo-
nentsare off before connectinginputs and
outputs.
2. Neatly organizew~ringbetweenthe KPS25sc
and the preamplifier and amplifier, and
betweenall other components.SeparateAC
wires from audiocables to prevent humand
other unwantednoises from being intro-
ducedinto the system.
3. Connectthe Krell CASTcablesfromthe left
andright Krell CAST4-pin outputs (42)
the KPS25sc back panel to your CAST-
enabledpreamplifieror amplifier.
For balanced or s~ngle-ended operation,
connectthe interconnect cables fromeither
the left andright fixed balanced(38), vari-
able balanced(39), fixed single-ended(40),
or variable single-ended(41) outputsonthe
KPS25sc back panel to the balanced or
single-endedinputs onyour preamplifier or
amplifier. (The remaining outputs can be
connectedto anotherpreamplifier or ampli-
fier in adifferent system).
IMPORTANT
Usevariable output terminals whenthe KPS25sc
is connecteddirectly to aKrell stereopowerampli-
fier or to a pair of Krell monauralpoweramplifiers
that donot havegaincontrol. Usingfixed outputs
candamagepoweramplifiers andloudspeakers.
Krell KPS25sc 5

QuickStart, continued
INPUTANDOUTPUTCONNECTIONS,continued
4. Connectthe cables from your sourceequip-
mentto the appropriate balanced(31), tape
(32) or single-ended (34, 35, 36) analog
inputs on the KPS25scbackpanel.
5. Connectthe cablesfrom your digital audio
or video sourceto the optics input (46)
coaxial digital input (47) on the KPS25sc
backpanel.
6. Connectthe cables from the optics output
(43) or coaxial digital output (44) on
KPS25scback panel to sendsignals to a
digital recordingdevice,externaldigital/ana-
log processor,or videosource.
7. Connectthe KPS25sc to ACpower: plug
" the ACpowerinto the IECconnector(50)
the back panel, then plug and ACpower
cordinto the wall socket.
IMPORTANT
Whenswitching betweenactive sources, always
lowerthe volumeto off or mutethe output. This
ensures that the next source played does not
damageyoursystemwith a highoutput transient.
POWERON
Powerthe KPS25sc on using the back panel
powerswitch (48). ThewordKRELLmomentarily
appearsin the menudisplay (26). This showsthe
KPS25scis initialized andreadyfor operation.
TheKPS25scis nowin the stand-by mode.The
red stand-byLED(12) illuminates.
TO PLAYA COMPACTDISC
1: After the KPS25sc~sinitialized andin the
stand-bymode,usethe powerbutton (12)
key to switch the componentto the opera-
tional mode.Theblue powerLED(13) illumi-
nates.Thecompactdisc transport is active.
2. Gentlyraisetheacryliccoveruntil it is upright
(approx.90
° angle).
3Removethe Krell compactdisc clamp and
placeyourcompactdisc onthe transport.
4. Securethe compactdisc with the compact
disc clamp(youmustusethis clampsince it
is part of the disc sensingmechanism).
5. Gentlypull theacrylic coverforwarduntil you
feel the dampermechanismresist slightly.
The damper mechanism is now engaged
andwill automatically finish closing the
cover.Donot force the coverto close faster
than the dampingmechanismallows.
6. Pressthe play button(4) or keyto begincom-
pact disc playback(playbackwill not begin
unlesscoveris closed).Theacrylic coverwill
also turn opaqueto protect compactdisc data.
7. Usethe level knob(25) or keysto adjust the
volumeto the desiredlevel.
8. Pressthe stop button (3) or keyto endcom-
pactdisc playback.
TO PLAYANOTHERINPUT
SOURCE
1. After the KPS25scis initialized andin the
stand-bymode,usethe powerbutton (12)
keyto switchthe KPS25scto the operational
mode.Theblue powerLED(13) illuminates.
2. Selectthe digital or analoginput sourceusing
the front panelbutton(14-19)or key. Thered
LEDabovethe source illuminates and the
source nameappears in the menudisplay
(26).
3. Followthe inputsourceoperatingdirections.
6 Krel KPS25sc

FIGURE1 ATTACHINGTHE KPS25sc ACRYLICCOVER
A.1
Push-pullpins fully closed
Pinsare shippedfully closed and
mustbereturnedto this position for
the acrylic coverto operateproperly.
A Push-pullpins
B Acrylic coverp~ns
C Notches
D Flexfoil cable
EFlexfoil receptacle
A.2
Push-pullpins fully extended
(Pinpositionis exaggeratedforillustrationpurposes)
Pinsare fully extendedonly duringacrylic
coverinstallation. Donot try to closethe
acrylic cover with the push-pull pins
extended.
Krell KPS25sc 7

FIGURE 2 CONNE(;TING THE KPS 25sc FLEX FOIL CABLE
E
Front
Back
E.1
Openflex foil
receptacle
Theopenflex foil
receptaclesleeveis fully
extended,asshown.If
theflex foil receptacle
is notopen,useyour
fingersto graspthe
sleeveandgentlyslide
it towardthebackof
the KPS25sc,before
attemptingto insertthe
flexfoil cable.
D
~Theclosedflex foil
~,~j~ receptacle.
Theflex foil cable
shouldbecurved
E.2
Alignthetip of theflex
foil cableparallelto the
openflex foil receptacle
andgentlyfeedtheflex
foil cableintotheopen
flexfoil receptacleuntil
the cabletouchesthe
rearof thereceptacle.
slightly butnotcrimped.
Closetheflex foil recep-
taclebyslidingthe
sleevetowardthe front
of the KPS25sc.
Krell KPS25sc

Installing theAcrylicCover
SeeFigure1 onpage7 andFigure2 onpage8
TheKPS25scis equippedwith an acrylic cover
that protects the integrity of compactdisc data.
Theuser cancustomizethe cover’s operation
and closing speed. SeeCustomizing Configu-
rations, on page27.
IMPORTANTmUSER PRECAUTION
Please read the following USERPRECAU-
TIONbeforeattemptingto install the acrylic
cover.
The KPS25sc acrylic cover is mechanically
dampedto ensuresmoothoperation while clos-
ing. If youforce thecoverto close, youwill dam-
age the cover and the damping assembly.
Duringoperation, pleasedo not force the cover
to close faster than the dampingmechanism
allows.
ATTACHINGTHE ACRYLIC COVER
Toattach the acrylic cover, follow the steps
describedbelowandfurther illustrated in Figure
1 on page7.
IMPORTANT
Attach the acrylic cover before connectingthe
flex foil cable.
1. Carefully removethe acrylic coverfrom the
velvet pouchandplace the cover on a soft
surface.
2. Locatethe twopush-pull pins (A) just above
the KPS25sc back panel. Thesepins are
shippedin the fully closed position (see
detail A.1). Pull the pins out until theyare
fully extended,as shownin detail A.2.
3. Locatethe pins(B) at the baseof the acrylic
cover and the notches (C) on top of the
KPS25sc, abovethe push-pull pins (A).
4. Withthe acrylic coverperpendicularto the
KPS25sc, align the acrylic cover pins (B)
with the notches (C) in the top of the
KPS25sc.
5. Gently lower the acrylic cover into the
notches(C), positioning the acrylic cover
pins (B) in the notches(C) in the top of
KPS25sc.
IMPORTANT
Makesure that the flex foil cable(D) attached
to the coveris not pinchedor crimpedas you
position andsecurethe acrylic cover.
6. Pushthe push-pull pins (A) back in
securethe cover. Seedetail A.1 for correct
pinposition.
IMPORTANT
TheKPS25scis shippedfrom the factory with
the coverpush-pullpins fully closed. Push-pull
pinsarefully extendedonly duringcoverinstal-
lation andmustbe closed whenoperating the
acrylic cover.
Donot try to closetheacrylic coverat this time.
Connecttheflex foil cablefirst.
Youcancustomizethe acrylic coverto be clear
or opaque,andto close at varying speeds.See
Adjusting the CoverClosingSpeed,on page
10, and Customizing Configurations, on
page27.
Krell KPS25sc

Installing the AcrylicCover,continued
CONNECTINGTHE FLEX FOIL
CABLE
Toconnectthe flex foil cable, follow the easy
steps describedbelowandillustrated in Figure
2 on page8.
IMPOFITANT
Donot crimpthe flex foil cable, either manually
or with pliers or other tools. Crimpingwill dam-
agethe flex foil cableandmakeff inoperable.
Usecarewheninserting the flex foil cable. Its
edgescanbe sharp.
1. Locatethe flex foil cable(D) attachedto the
acrylic coverandthe flex foil receptacle(E)
on top of the KPS25sc. Makesure the flex
foil receptacleis open(seedetail E.1).
2. Usingyour fingers, carefully align the flex
foil cable(D)sothat its tip is parallel to the
openflex foil receptacle. Againusing your
fingers, gently feedthe flex foil cable (D)
into the flex foil receptacleuntil the cable
touches the rear of the receptacle (see
detail E.2).
3. Closethe flex foil receptacleby sliding the
sleeve toward the front of tl~e KPS25sc
(see detail E.3). Therewill be an audible
click whenthe flex foil cablelocks into the
closedposition (seedetail E.4).
4. Recheckthat the flex foil cable~scurvedbut
not crimped.
Theacrylic coveris nowreadyfor operation.
ADJUSTINGTHE COVER
CLOSING SPEED
Youcan adjust the cover closing speedusing
the lid damperadjust screw(37) on the back
panel. Adjustments can be madewhile the
coveris upor down.
Todecreasespeed,turn the screw
clockwisein 1/8 inch increments.
Toincrease speed,turn the screwcoun-
terclockwisein 1/8 inch increments.
IMPORTANT
Thelid damperadjust screwis very sensitive.
Alwayssupport the cover while adjusting the
screwto keepthe coverfromclosing too fast.
10 Krell KPS25sc

FIGURE 3 THE KPS .~5sc FR~ )NT PANEL
234 5613 14 15 21 22 26 27 28
7 8 9 10 11 12 16 17 18 19 20 24 23 25 29 30
CompactDisc
Transport Functions
1 CompactDisc Display
2 PauseButton
3 Stop Button
4 Play Button
5 HDCD
® LED
6 SYNCLED
7 SearchBackButton
8 SearchForward Button
9 TrackBackButton
10 Track ForwardButton
11Drive Off Button
12 PowerButton and
Stand-by LED
13 Power LED
Digital Inputs
and LEDs
14 CDButton
15 AESButton
16 Optics1 Button
17 Optics2 Button
18 Coax1Button
19 Coax2Button
AnalogInputs
and LEDs
20 B-1 Button
21 S-1 Button
22 S-2 Button
23 S-3 Button
24 TapeButton
VolumeAdjustment and
MenuFunctions
25 Level Knob
26 MenuDisplay
27 Fixed Output Mute
Button and LED
28 Variable Output Mute
Button and LED
29 MenuButton and LED
30 Phase LED

FrontPanelDescription
SeeFigure3 onpage11
The front panel of the KPS25sc accesses
poweronandoff, compactdisc functions, digi-
tal andanaloginput selections, volumeandbal-
ancecontrol, menuselection, and mute. The
displays showthe status of compact disc play-
back and volume, balance, and menu.
CompactDisc Transport Functions
1 CompactDisc Display
Thecompactdisc transport display showsthe
track numberof the compactdisc that is playing
as well as programming and other status
information.
2 Pause Button
Usethis button to temporarily suspendplay-
backof the compactdisc track. Toresumeplay-
ing the track at the point pausewasengaged,
pressthe play button(4).
3 Stop Button
Usethis button to stop compactdisc playback.
4 Play Button
Usethis button to activate playbackfrom the
beginning of the compactdisc, or to resume
playback after pause. For moreinformation,
see Operating Your KPS25sc, on page 26,
and Customizing Configurations, on page
27.
5 HDCD
® LED
The HDCD
® LED illuminates when a High
Definition CompatibleDigital ®disc is playing,
indicating that HDCD
®decodingis functioning.
6 SYNC LED
TheSYNCLEDilluminates whenthe KPS25sc
digital input selection haslockedonto a valid
signal fromthe internal transportor anexternal
source component.
7 Search BackButton
Pressandhold this button to scroll backward
throughthe current track,
8 Search ForwardButton
Pressand hold this button to scroll forward
throughthe current track.
9 Track BackButton
Usethis button to select andbeginplaying the
track that precedesthe current track,
10 Track ForwardButton
Usethis button to select andbeginplaying the
track that follows the currenttrack.
11 Drive Off Button
Usethis button to turn the compactdisc trans-
port onandoff.
12 PowerButton and Stand-by LED
Usethis button to switch the KPS25scbetween
the stand-by and the operational modes.The
red powerstand-by LEDilluminates whenthe
KPS25scis in the stand-by mode.
13 Power LED
The blue power LED illuminates when the
KPS25scis in the operational mode.Theblue
powerLEDalso flashes whenany remotecon-
trol keyis pressed.
12 Krell KPS25sc

FrontPanel,continued
SeeFigure3 onpage11
Digital Inputs andLEDs
TheKPS25sc is equippedwith the following
digital inputs. Thered LEDaboveeachbutton
illuminates whenthat input is selected.
14 CDButton
Usethis button to select the internal compact
disc transport.
15 AESButton
Usethis buttonto select the correspondingrear
panelinput that ~s connectedto anAESdigital
source,
16 Optics1 Button
17 Optics2 Button
Usethese buttons to select the corresponding
rear panel input that is connectedto an EIAJ
fiber opticdigital source.
18 Coax1Button
19 Coax2Button
Usethese buttons to select the corresponding
rear panelinput that is connectedto a S/PDIF
coaxial source.
AnalogInputs and LEDs
TheKPS25sc is equippedwith the following
analog inputs, Thered LEDaboveeachbutton
illuminates whenthat input is selected.
20 B-1 Button
Usethis button to select the correspondingrear
panelinput that is connectedto a balancedana-
log source.
21 S-1 Button
22 S-2 Button
23 S-3 Button
Usethese buttons to select the corresponding
rear panelinput that is connectedto a single-
endedanalog source.
24 Tape Button
Usethis button to select the correspondingrear
panelinput that is connectedto a tape source.
Forinstructions onusingthis function, seeTape
Input andOutput,on page25.
VolumeAdjustment
and MenuFunctions
25 Level Knob
Usethis knobto increase or decreasesystem
volume level. Volumelevel is shownin the
menudisplay (26). Thelevel control knob
also used, along with the menucontrol button
(29), to select menufunctions to customize
KPS25sc features. See Customizing Con-
figurations, on page27.
26 MenuDisplay
Themenudisplay showsvolumelevel, balance
level, andmenufunction selection andstatus.
See Customizing Configurations, on page
27.
27 Fixed Output Mute Button and LED
Usethis button to mutethe fixed output. The
LEDilluminates whenthe fixed output is muted.
28 Variable Output Mute Button and LED
Usethis button to mutethe variable output. The
LEDilluminates whenthe variable output is
muted.
29 MenuButton and LED
Usethe menucontrol button to access menu
functions for customizing the KPS25sc. The
LEDilluminates whenthe menufeature is acti-
vated. See CustomizingConfigurations, on
page27.
30 Phase LED
Theabsolute phaseLEDilluminates whenthe
absolute polarity of the variable or CASTout-
putsis reversed.
Krell KPS25sc 13

FIGURE 4 THE KPS 25sc BACK PANEL
31 32 33 37 38 39 42 43 44 45 48 49 50
34 35 36 40 41 46 47 51 52 53 54
AnalogInputs and Outputs
31 B-1 Left andRight Inputs
32 Tapen Left and Right
33 TapeOutLeft and Right
34 S-1 Left andRight Inputs
35 S-2 Left andRight Inputs
36 S-3 Left andRight Inputs
Acrylic Cover
37 Lid DamperAdjust
Fixed and Variable BalancedOutputs
38 Fixed Left andRight
39 Variable Left andRight
Fixed and Variable Single-EndedOutputs
40 Fixed Left andRight
41 Variable Left andRight
Krell CASTOutputs
42 Krell CASTOutputs Left and Right
Digital Inputs andOutputs
43 Optics1 and Optics2 Outputs
44 Coax1and Coax2Outputs
45 AESOutput and Input
46 Optics1 andOptics2 Inputs
47 Coax1and Coax2Inputs
Power
48 Back Panel PowerSwitch
49 Line Fuse
50 IEC Connector
BackPanel RemoteConnections
51 Krell Link Out
52 Krell Link In
53 RC-5
54 12 VDCOut

BackPanelDescription
SeeFigure4 onpage14
TheKPS25sc backpanel provides connections
for all inputs andoutputs, poweron/off, and
additional remoteconnections.
AnalogInputs and Outputs
31 B-1 Left andRight Inputs
TheKPS25scis equippedwith onepair of bal-
ancedanalog source inputs with XLRconnec-
tors.
32 TapeIn Left andRight
TheKP$25scis equippedwith onepair of sin-
gle-ended tape source inputs with RCAcon-
nectors.
33 TapeOutLeft and Right
TheKPS25scis equippedwith onepair of sin-
gle-ended tape source outputs with RCAcon-
nectors.
34 S-1 Left andRightInputs
35 S-2 Left andRight Inputs
36 S-3 Left andRight Inputs
TheKPS25scis equippedwith three pairs of
single-ended analog source inputs with RCA
connectors.
Acrylic Cover
37 Lid DamperAdjust
Usethis screwto adjust the speedat whichthe
acrylic cover closes. SeeAdjustingthe Cover
ClosingSpeed,on page10.
FixedandVariable Balanced
Outputs
38 Fixed Left andRight
TheKPS25scis equippedwith onepair of fixed
level balancedoutputs with XLRconnectors.
39 Variable Left andRight
TheKPS25scis equippedwith onepair of vari-
able level balancedoutputs with XLRconnec-
tors.
IMPORTANT
Whenthe KPS25scis connecteddirectly to a
Krell stereo powerampfifier or a pair of Krell
monauralpoweramplifiers that do not have
galh control, usethe variable output terminals
to ensure proper volumelevel control Using
fixed outputs could damagepoweramplifiers
andloudspeakers.
FixedandVariable
Single-EndedOutputs
40 Fixed Left andRight
TheKPS25scis equippedwith onepair of fixed
level single-ended outputs with RCAconnec-
tors.
41 Variable Left andRight
TheKPS25scis equippedwith oneset of vari-
able level single-ended outputs with RCAcon-
nectors.
Krell CASTOutputs
42 Krell CASTOutputsLeft and Right
TheKPS25scis equippedwith oneset of vari-
able level outputs, with 4-pin bayonetconnec-
tors, for use with Krell CAST-equippedFull
PowerBalanced200c, 300c, and 600c Stereo
Amplifiers; and 250Mc, 350Mc, and 650Mc
MonauralAmplifiers or with the Krell Master
ReferenceAmplifiers.
Krell KPS25sc 15

BackPanel,continued
SeeFigure4 onpage14
Digital Inputs andOutputs
43 Optics1 and Optics2 Outputs
TheKPS25sc is equippedwith two EIAJ fiber
optic digital outputswith TosLinkconnectors.
44 Coax1 and Coax2Outputs
The KPS25sc is equipped with two S/PDIF
coaxial digital outputswith RCAconnectors.
45 AESOutput and Input
TheKPS25scis equippedwith oneAESdigital
output andinput with XLRconnectors.
46 Optics1 and Optics2 Inputs
TheKPS25scis equippedwith two EIAJ fiber
optic digital inputs with TosLinkconnectors.
47 Coax1and Coax2Inputs
The KPS25sc is equipped with two S/PDIF
coaxial digital inputs with RCAconnectors.
Power
48 Back Panel Power Switch
Usethe backpanelpowerswitch for the initial
KPS25scpoweron. For moreinformation, see
Connecting the KPS25sc to Your System,
on page22.
49 Line Fuse
The50/60 Hzline fuse protects the KPS25sc
againstshort circuits fromthe externalACpower.
Note
Replacefuses only with the fuse value speci-
fied onthe backpanel
50 IEC Connector
Theconnectoris for usewith the providedIEC
standard 15 ampACpowercord.
BackPanel RemoteConnections
51 Krell Link Out
52 Krell Link In
TheKPS25sc is equipped with a Krell Link
communicationsoutput and input data port.
Krell Link allows synchronized remote power
on andoff of other componentswith Krell Link,
such as Full PowerBalanced amplifiers or
MasterReferenceAmplifiers.
53 RC-5
TheKPS25sc is equippedwith an RC-5input
that makescustominstallation easyandsecure
by accepting basebandRC-5 input commands
fromhardwiredremotecontrollers.
54 12 VDCOut
TheKPS25sc is equippedwith an output that
sends12 VDCpoweron/off (12 V trigger) sig-
nals to other Krel components and other
devices that incorporate a 12 Vtrigger. This
allows youto turn other componentson or off,
or to and from stand-by, from the KPS25sc.
Whenthe KPS25sc is switched between the
stand-by and operational modes,it sends a
signal from the 12 VDCOutthat will switch
other components,allowing wholeor parts of
systemsto be easily coordinated.
Notes
The12 VDCoutput poweris limited to 30 ma.
Consultthe owner’sreferenceof the components
usedin a custominstallation to takefull advan-
tageof the remotecapability of the KPS25sc.
16 Krell KPS25sc