Krell Industries KSL-2 Guida rapida

A. INTRODUCTION,

Thankyou for your purchase of the .KRELLKSL-2.T.he

KSL-2utilizes someof the latest evolutions in preampli-

fier technology. In the KRELLtradition, the KSL-2’S

exceptionalsonic quality sets the standard, creating a

new-level of performancevalue.

Toobtain the best performance.fromyour KSL-2,careful

attention sh.ouldbe paidto its placement,installation and

operation. Athor_oughunderstandingof these detail.s will

helpinsuresatista.ctory operationandlonglife for tlae

KSL-2and related system components.

This Owner’sReferenceis divided into several sections,

eachdesignedto performa different function. Asyou

.read throughthe.Ow.ner’sReferenceyouwill beco.me

t)et.ter acquaintedwitt~the features andfunctionsttmt

makethe KSL-2a superb value. AQuestion and Answer

section is included whereanswersto commonquestions

are provided. Shouldyou have any questions or sugges-

tioffs pleasefeel free to contact yourauthorizeddealer or

the KRELLstaff for assistance.

In the unlikely event that your.KSL-2.shouldrequire

service, youwill bepleasedto _lgaowtlaat it is backedby_

c.ompreliensiveCustomer5atistaction policy and one of

the mostadvancedservic.e facilities in the industry._l~or

detailed informationontt~e termsandconditionsot ser-

vice, please consult yourwarrantyreg!stration card, or

your authorized KRELLDealer/Distnt)utor.

B. TABLE OF CONTENTS

UNPACKING AND ASSEMBLY

BASIC INSTALLATION ANDOPERATION

INPUT AND OUTPUT CONNECTIONS

BASIC PREAMPLIFIER OPERATION

QUESTIONS AND ANSWERS

SPECIFICATIONS

WARRANTYAND SERVICE INFORMATION

C. UNPACKING AND ASSEMBLY

1. Openthe boxand removethe top layer of foam.The

KSI2-2andfollowingitems will nowtie visible:

T-15torx key~or3/32 allen key

Warrantycard

ACpower cord

Owner’s Reference

NOTE:If any of these items are not included please

contact yourauthorized dealer immediatelyf6r assis-

tance.

2. Removethe plastic bagfromthe preamplifier.

NOTE:Saveall packingm. at.erials. If youmustship your

KS.L-2in the future, repacktoe unit in its original

packagingto prevent transit damage.

D. BASIC INSTALLATION AND

OPERATION

1. Place the unit ona firm level surface free fromexces-

sive dirt or moisture..TheKSL-2is not particularly hum

sensitive, therefore other componentscan be placed on or

aroundthe KSL-2.Care should be taken howeverif the

optional phonoboard is installed. Motors,power

supplies and somedigital devices can induce hum

through the phonoboard.

2. Plugthe ACcord into the receptacle on the backof the

unit. Plugthe remainingendinto the wall ACreceptacle.

Thepilot LEDwill illuminate.

NOTE:While the KSL-2has superb regulation and does

not require a dedicatedACcircuit, westrongly advise

against any connectionsthrough extension cords or mul-

tiple ACadaptors. Highquality 15 ampline conditioners

or grounded~Cstrips are acceptable.

NOTE:TheKSL-2is designedto be left ONat all times.

OPTIONAL PHONOOPERATION

TheKSL-2has an optional phonoboard available. The

phonoboard is swichable f6r Movingmagnetand Mov-

ing coil phonocartridges. Shouldthe phon,o. boardbe

orderedat a later dat,~, a full descriptionot installation

and operation is supplied with the phonoboard.

1. Withphonoboardinstall,ed, set the input impedance

loading of the phonocartridge to the load impedance

closest to the manufacturer’sspecification. Theunit ,

comesfactory set,to 100 ohmsin the Movingcoil switch

position. FolIowthe instructions in the KSL-2Phono

Manualfor exact set-up description should changesbe

necessary.

E. INPUT AND OUTPUT

CONNECTIONS

CAUTION:Whenmaking connections to this component

or any other, makesure tlie poweramplifier is OFF.

CAUTION:Makesure all cable terminations are of the

highest quality, free fromfrayedends, shorts or cold

soIderjoints.

1. Connect[he left andright outputs of yoursourcecom-

ponentsto the inputs on the KSL-2.TheKSL-2is

equippedwith twosingle-ended inputs, twobalanced

capableinputs, a single-endedtape input andtape output.

Thesingle-endedand balancedinputs are labeled S-1 and

S.-2, B-Iand_B-2respectively, to allowcustomizationin

the set-up ot yoursystem.Tlie Tapeinput is labeled

TAPEIN, the Tapeoutput is labeIed TAPEOUT.There is

no difference betweenthe twosingle-endedinputs, or

betweenthe twobalancedi.nputs.. If youhavethe optional

phonoboardinstalled, it will utilize the S-1inputincl.ud-

mgthe external phonogroundconnector. Theexternal

phonogroundconnector is labeled GND.Youc.anno.t use

the S-1 input connectorsas a line level input whenthe

phonoboardis installed.

2. Connectthe output of the KSL-2to the input of your

poweramplifier. TheKSL-2has both Balancedoutputs

v!a standard XLRconnectors and single-ended outputs

via standard RCAconnectors.

Thepinassignment for the XLRconnectors is:

pin 1-=shield (ground) .

p!n 2 = non-inverting~nput(hot)

pin 3 = inverting input

NOTE:TheRCAcenter conductor for each channel is

wiredin parallel withpin 2, the non-invertedo, utput.

Onlyoneof these outputs shouldbe connectectto a single

stereo amplifier.

NOTE:Whenconnecting inputs or outputs to the KSL-2,

rememberthe balanced connections will have 6dBof

gain morethan the single-ended connections. Whenlevel

matchingis critical in yourinstall, keepthis specification

in mind.

F. BASIC PREAMPLIFIER

OPERATION

1. Select the Muteposition on the KSL-2.

2. Turnthe volumecontrol fully counterclockwiseto the

Offposition.

3. Turnthe poweramplifier On.Besure the KSL-2is on

at this point. If the KSL-2is notpoweredat this time,

turn the amplifier Off andplug tile KSL-2into the wall

ACreceptacle. Resumeoperation sequence. "

4. Choosea listening source andselect that input withthe

select switch on the-KSL-2.

5. Start playof the source.

6. Slowlyturn the volumecontrol clockwiseuntil you

reach a comfortablelistening level.

7. Whenchangingsources, return to the. Muteposition

and/orlowerthe volume.Thisinsures tlaat tlae next

sourceyouplay will not be potentially damagingto your

systemwitti a highoutputtransient.

8. Enjoy

REAR PANEL DESCRIPTION

INPUTS

Twosingle-ended inputs via standard RCAconnectors

S 1- Dedicatedto Phonoinput if boardis installed

Twobalanced inputs via standard XLRconnectors

TAPE

Tapeinput via standard RCAconnectors

TAPE OUTPUT

Record via RCAconnectors

MAIN OUTPUTS

Single-ended RCAoutput connectors

Balanced XLRoutput connectors

XLRinput and output pin configuration

p!n 1 Ground(shield)

p.an 2 0 degrees(non-inverting)

pan3 180~legrees (inverting)

G. QUESTIONS AND ANSWERS

Q. WhenI turn up the volumeon the KSL-2a loud hum

is present fromtlie loudspeakers.Whatcouldit be?

A. Humcan be causedby several different disturbances.

Checkto makesure all of the cables in andout of the

KSL-2are sound and makingproper contact. Makesure

there are_no powersupplies or huminducing components

ontop o~ or directly belowthe KSL-2.

Youalso could be experiencinga groundloop in the

system. Agroundloop can be ca.used whe.nseveral.

componentswithdiffgrent groundpotentials are in.tlae

system.Groundloops can often be easily correctefl.

Consu.lt your dealer or KRELLfor systemgrounaing

considerations.

Q. Canthe KSL-2be used to control morethan one

system?

A. Yes, the KSL-2has both single-ended and balanced

outputs that can be usedsimultaneouslyto control two

seperate systems.

Q. WhenI select the B1 !nput. onthe KSL-2,on.e channel

seemsto haveless gain tlaan tlae other. Is something

wrongwith the preamp?

A. Morethan likely there is not a problemwith the

KSL-2.Thebalancedinput or ou.tpu, t internal cable termi-

nationscouldbeincorrect. Switclatlae suspectc.abl.e to

the other channelandvice versa to determinewlaetlaer a

cable is defective. If the problemswitchesto the other

channel,it is a defective cable. If the problemdoesnot

moveto the other channeland remainsthe sameafter

cables havebeen.switched,checkthe wiringat the input

of the KS.L-2witla the sameprocess.If it is not cableor

source related call your dealer or KRELL.

Checkto makesure the balancecontrol is in the fully

upright position.

Q. Whydo I have, to turn up the volumeso high to get

musicat a normmlistening level?

A. If your systemdoesnot seem.to haveenoughgain

overall, youare probab~lynot utilizing the balancedinput

or output capabihties ot the KSL-2.F-or every balanced

termination on the KSL-2you increase the gain by 6dB.

~. I camehomeone eveningand the pilot LEDin the

SL-2wasnot illuminated( Whatshould I do?

A. Unplugthe KSL-2fromthe wall ACreceptacle an.d

checkthe fuse in the rear panel.If there is a breakin tlae

wireinside the fuse, replaceit. If there is nobreakin the

fuse, donot try turning onthe preamplifi.eror replacing

the fuse. Call )our defiler or KRELL.If tlae newfuse lets

thee unit turn onwhenyouplugit in, thenfails shortly.

atterward, call KRELLIndustries. If the fuse solves tlae

problem,carry onlistening as usual.

H. SPECIFICATIONS

GAIN

7.SdB

SIGNAL-TO-NOISE

< -90 dBunweighted

THD

1K < 0.01%

20K < 0.01%

INPUT IMPEDANCE

47,000 ohms(47K)

OUTPUT IMPEDANCE

11 ohms

OUTPUT VOLTAGE

8 volts R.M.S.

DIMENSIONS

19" WIDE

14" DEEP

2.5" HIGHwith feet

WEIGHT

Unit only 19pound,s

packed 24 pounos

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