A, INTRODUCTION Thank you for your purchase of the KRELL KST-100 poweramplifier.This amplifier represents the latest evolution ~n amplifier technology and incorporates many innovative design features. To obtain the best performancefrom. your KST-100, careful attention sfiould be paid to placement,installation and operation. A thorough understandingof these details will help insure satisfactory operation and long life for the KST-100and related system components.
TABLE OF CONTENTS 4 UNPACKING AND ASSEMBLY 5 BASIC INSTALLATION AND OPERATION 6 INPUT AND OUTPUT CONNECTIONS 8 AMPLIFIER OPERATION 9 PROTECTION CIRCUITRY 10 MONAURAL CONVERSION 11 REAR PANEL DESCRIPTIONS 12 QUESTIONS AND ANSWERS 14 15 OPERATION SPECIFICATIONS WARRANTY AND SERVICE 3 INFORMATION
B. UNPACKING AND ASSEMBLY NOTE: Do to the weight of the KST-100it is s.trongly advised that unpackingand placement is completed by at least two individuals. 1. Openthe box on one end. 2. Fold back the flaps on all four sides of the box and carefully roll it over on to the exposedend. 3. Pull the box straight up and off exposingthe foam packing material. 4. Lay the foamcontainer downon the floor and pull off the top section.
C. BASIC INSTALLATION AND OPERATION 1. Place the KST-100on a firm level surface awayfrom excessivedirt or moisture. Ideally the amplifier should be placed as close to. the speakersas possible. It is always preferable to run long_ interconnectcables to the amplifier and keep speaker calSle length to.a minimum= Speal~er cable does add an impedanceat the output ot the amplifier, regardless of the cable’s g.uage. AIIKRELL amplifiers wilI drive the lowest impeclanc,es with ease.
D. INPUT AND OUTPUT CONNECTIONS CAUTION: Whenmaking connections to this component or any other, makesure the poweramplifier is OFFand the preamplifier is in the MUTE or STANDBY mode. 1. Connectthe speakercables .to. the output terminals of the amplifier. Tile KS~T-100 utilizes twosets of parallel 5-w~ybinding posts tor the left and right channels. This confi~guration makescable connections and bi-wiring simple. NOTE: The binding, posts are of the highest quality but will breakif over.tigla.tened.In.se.
Thepin assignment for the XLRis: pin _1-= shield (ground) . p!n 2 = non-inverting ~nput (hot) p~n 3 - inverting input NOTE:The RCAcenter conductor for each channel is wiredjn, parallel with pin 2, the non-inv.ertedinput. Only one ot tlaese inputs should be connecteclto a preamplifier. 3. Insert the ACpowercord into the receptacle located on the back of the KST-100.Insert the other end into the wall ACr_.eceptacle.
Eo AMPLIFIER OPERATION 1. Pushthe black breaker type switc.h on the front of the amplifier to turn it on. TheLEDin the switch will illuminate. Whenturning on the system, the a _m,plifier should always be last. Uponturn-on, the amplifier s outputs are not connectedtothe speakers. After the protection circuits have determinedthat the unit has completelystabilized, the.speaker relays will be engaged.YouwilI hear a click at th~s point. Theamplifier is nowready to use.
E PROTECTION CIRCUITRY There are no fuses in the KST-100.The amplifier is protected by a series of non-intrusive, opto-c_o,upled circuits that constantly evaluate the amplifier s operation. Appropriateprotective action exists for DCconditions, short circuit, oscillation, ACpoweranomalies, high groundresistance and out-of:phase ground. Collectively the protection circuitry is designedto avoid damageto the amplifier or speal~ers causedby othe.
G. MONAURAL CONVERSION AND OPERATION The KST-100can be easily cgnverted into a 400 watt monauralamplifier. To switcla the amplifier to mono follow these instructions. 1. Removethe topcover from the amplifier via 8 topcover screws. 2. Find the toggle switch located at the rear of the amplifier mountedon the circuitboard.. Mo.vethe toggle switch over to the Monosetting printecl on tlae circuitboard. 3. Reinstall the topcoverand the 8 topcover screws. OPERATION 1.
H.
I. OUESTIONS AND ANSWERS Q. Should I leave the KST-100ONat all times? A. Althou.gh you could leave the KST-100ONat all times without fear of damageto the amplifier, we recommend30 minutes of warm-up_before critical listening and switching the amplifier off whennot in use. . WhenI push the powerswitch on the front of the ~ST-100, the amplifier doesn’t turn ON.Whatshould I do? A. Unplugthe amplifier from the ACreceptacle and removettie input from the amplifier.
Q. After the amplifier is playing for about one hour it becomes very hot. Is this normal? A. Yes. Due to the design of the KST-100it will become quite warmwhen driven hard. If the amplifier should have a severe temperature inbalance between the left and fight channel, unplug the unit and call your authorized dealer or Krell. Q. I tried a ne.w. preamplifier in myaudio system and when| turnecl ttle unit on tlae KST-100shut off. Is the amplifier defective? A. Morethan likely the amplifier is not defective.
¯ I. SPECIFICATIONS KST-100 GAIN 26dB, SIGNAL-TO-NOISE 102dB unweighted THD 1K at 8 ohms less than. 1% 20K at 8 ohms less than .3% INPUT IMPEDANCE 47,000 ohms(47K) INPUT SENSITIVITY 1.5 volts for 100watts out OUTPUT IMPEDANCE ¯ 1 ohms OUTPUT VOLTAGE 80 volts peak to peak 8 ohms OUTPUT POWER All readings are continuous output power, per channel ohms ohms ohms ohm 100 watts 200 watts 400 watts 800 watts DIMENSIONS 18.0" 14.8" 6.
K. WARRANTYAND SERVICE INFORMATION There are no user-serviceable parts inside the KST-100. The KST-100 has a limited warranty of .five years parts and labor. Return freight is includedin the warranty.. The warranty, pe~od,begins on ~the date of purchaseand is activated witla the return ot the enclosed WarrantyCard and a copyof the Sales receipt. Please return the war-. ranty card immedia.tely.aftersuccessful installation anti operation are completecl. Thewarrantyfor Krell productsis valid ~nILq~in t.
45 CONNAIR RD ORANGE, CT 06477 SALES 203-799-9954 FAX 203-799-9796
