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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 performance from. your KST-100, careful attention sfiould be paid to placement, installation and operation. A thorough understanding of these details will help insure satisfactory operation and long life for the KST-100 and related system components. This Owner’s Reference is di
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TABLE OF CONTENTS 4 UNPACKING AND ASSEMBLY BASIC INSTALLATION AND OPERATION 5 6 INPUT AND OUTPUT CONNECTIONS AMPLIFIER OPERATION 8 PROTECTION CIRCUITRY 9 10 MONAURAL CONVERSION OPERATION 11 REAR PANEL DESCRIPTIONS 12 QUESTIONS AND ANSWERS 14 SPECIFICATIONS 15 WARRANTY AND SERVICE INFORMATION 3
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B. UNPACKING AND ASSEMBLY NOTE: Do to the weight of the KST-100 it is s.trongly advised that unpacking and placement is completed by at least two individuals. 1. Open the box on one end. 2. Fold back the flaps on all four sides of the box and carefully roll it over on to the exposed end. 3. Pull the box straight up and off exposing the foam packing material. 4. Lay the foam container down on the floor and pull off the top section. The following items will now be visible: 1 KST- 100 stereo amplif
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C. BASIC INSTALLATION AND OPERATION 1. Place the KST-100 on a firm level surface away from excessive dirt or moisture. Ideally the amplifier should be placed as close to. the speakers as possible. It is always preferable to run long_ interconnect cables to the amplifier and keep speaker calSle length to.a minimum= Speal~er cable does add an impedance at the output ot the ampli- fier, regardless of the cable’s g.uage. AIIKRELL amplifi- ers wilI drive the lowest impeclanc, es with ease. When imped
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D. INPUT AND OUTPUT CONNECTIONS CAUTION: When making connections to this component or any other, make sure the power amplifier is OFF and the preamplifier is in the MUTE or STANDBY mode. 1. Connect the speaker cables .to. the output terminals of the amplifier. Tile KS~T-100 utilizes two sets of parallel 5-w~y binding posts tor the left and right channels. This confi~guration makes cable connections and bi-wiring simple. NOTE: The binding, posts are of the highest quality but will break if over.t
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Thepin assignment for the XLR is: pin _1-= shield (ground) . p!n 2 = non-inverting ~nput (hot) p~n 3 - inverting input NOTE: The RCA center conductor for each channel is wiredjn, parallel with pin 2, the non-inv.erted input. Only one ot tlaese inputs should be connectecl to a preamplifier. 3. Insert the AC power cord into the receptacle located on the back of the KST-100. Insert the other end into the wall AC r_.eceptacle. (Refer to section C, Basic Installa- tion and Operation, for AC power req
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Eo AMPLIFIER OPERATION 1. Push the black breaker type switc.h on the front of the amplifier to turn it on. The LED in the switch will illumi- nate. When turning on the system, the a _m, plifier should always be last. Upon turn-on, the amplifier s outputs are not connectedto the speakers. After the protection circuits have determined that the unit has completely stabilized, the.speaker relays will be engaged. You wilI hear a click at th~s point. The amplifier is now ready to use. The amplifier wi
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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. Appropriate protective action exists for DC conditions, short circuit, oscillation, AC power anomalies, high ground resistance and out-of:phase ground. Collectively the protection circuitry is designed to avoid damage to the amplifier or speal~ers caused by othe.r defective com- ponents, faulty wiring, mish
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G. MONAURAL CONVERSION AND OPERATION The KST-100 can be easily cgnverted into a 400 watt monaural amplifier. To switcla the amplifier to mono follow these instructions. 1. Remove the topcover from the amplifier via 8 topcover screws. 2. Find the toggle switch located at the rear of the ampli- fier mounted on the circuitboard.. Mo.ve the toggle switch over to the Mono setting printecl on tlae circuitboard. 3. Reinstall the topcover and the 8 topcover screws. OPERATION 1. The input of the KST-100
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H. REAR PANEL DESCRIPTIONS INPUTS: Balanced via 3 pin XLR connector Single ended via RCA connector XLR PIN CONFIGURATION p!n 1 Shield (ground) p!n 2 Non-inverting or 0 degrees (hot) p~n 3 Inverting or 1-80 degrees OUTPUT: Two pairs of five-way binding posts in parallel, per channel OTHER: Standard AC receptacle 20 amp circuit breaker type power switch OPTIONS: Black Faceplate 11
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I. OUESTIONS AND ANSWERS Q. Should I leave the KST-100 ON at all times? A. Althou.gh you could leave the KST-100 ON at all times without fear of damage to the amplifier, we recom- mend 30 minutes of warm-up_ before critical listening and switching the amplifier off when not in use. . When I push the power switch on the front of the ~ ST-100, the amplifier doesn’t turn ON. What should I do? A. Unplug the amplifier from the AC receptacle and remove ttie input from the amplifier. Check the output c
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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-100 it will become quite warm when 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 my audio system and when | turnecl ttle unit on tlae KST-100 shut off. Is the amplifier defective? A. More than likely the amplifier is
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¯ 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 100 watts 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 100 watts ohms 200 watts ohms 400 watts ohm 800 watts DIMENSIONS 18.0" WIDE 14.8" DEEP with handles 6.5" HIGH with feet SHIPPING WEIGHT 60 pounds 14
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K. WARRANTY AND 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 purchase and is activated witla the return ot the enclosed Warranty Card and a copy of the Sales receipt. Please return the war-. ranty card immedia.tely.after successful installation anti operation are completecl. The warranty for Krell products is val
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