Instruction/ maintenance manual of the product KSA-100S Krell Industries
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~NALOG AND DIGITAL PRODUCTS S-SERIES I BIAS LEVEL I 04 0 40 O~ ~0 01 10 KSA-100S / 200S/300S OWNER’S REFERENCE.
INTRODUCTION Thank you for your purchase of the KRELL KSA-100S/200S/300S power amplifier. These amplifiers represent the latest evolution in amplifier technology, matching unprecedented performance with convenience not obtainable from most high performance audio designs.
TABLE OF CONTENTS 4 UNPACKING 5 LOCATION AND REMOTE TURN-ON 6 CABINETRY AND AC POWER CONSIDERATIONS 7 AMPLIFIER FEET AND REMOTE MASTER/SLAVE CONNECTIONS 9 INPUT AND OUTPUT CONNECTIONS 12 AMPLIFIER OPE.
UNPACKING NOTE: Due to the extreme weight of the KSA amplifiers, it is strongly advised that unpacking and placement is completed by at least two individuals. 1. Open the box. 2. Fold back the flaps on all four sides of the box and carefully roll it over on to the exposed end.
BASIC INSTALLATION LOCATION Place the KSA on a firm level surface away from excessive dirt or moisture. When using custom racks or cabinetry, keep in mind the weight and ventilation requirements for these amplifiers. Ideally the amplifier should be placed as close to the speakers as possible.
BASIC INSTALLATION CABINETRY CONSIDERATIONS High bias amplifiers dissipate much of the power they consume in heat. Because the KSA- 100S/200S/300S utilize Sustained Plateau Biasing, they remain cool when not in use. When the KSA is in use, it can become quite hot.
BASIC INSTALLATION AMPLIFIER FEET The feet on the KSA can be used in several different ways. They are made from machined Delrin and are supplied with separate threaded rubber bottoms. The rubber bottoms can be screwed into the feet for protection of fragile surfaces such as hardwood floors or furniture.
BASIC INSTALLATION 4. Connect additional amplifiers as described in step 3. 5. When the cables are all in place, point the remote control at the amplifier designated as Master and press the Power button. The amplifiers will all turn on at the same time.
CONNECTIONS 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 STAND-BY mode. The wiring to and from the amplifier, and all components in, general, should be arranged in a neat, organized manner.
CONNECTIONS The pin assignment for the XLR is: pin 1 = shield (ground) pin 2 = non-inverting input (hot) pin 3 = inverting input NOTE: The RCA center conductor for each channel is wired in parallel with pin 2, the non-inverted input. Only one of these inputs should be connected to a preamplifier.
CONNECTIONS LOUDSPEAKERS KSA AMPLIFIER R L PAGE 11.
OPERATION AMPLIFIER OPERATION Understanding the ’operation of the amplifier is very easy. Equally important is an understanding of the care that should be exercised when operating the system as a whole, in relation to the enormous power output of the KSA.
OPERATION DESCRIPTION OF TURN-ON SEQUENCE When turning on the system, the amplifier should always be last. The KSA On/Off switch is part of a multi-level turn-on circuit that goes through several steps of protection. Upon turn-on, the amplifier’s outputs are not connected to the speakers.
OPERATION SYSTEM NOISE CONSIDERATIONS AC grounding often becomes critical when connecting high performance audio gear. When mixing and matching audio components, each with their own ground potentials, a low frequency hum can become present in one or both speakers.
OPERATION BIAS LEVEL METER The KSA amplifiers utilize Sustained Plateau Biasing, a proprietary KRELL design. The Bias display meter on the front panel of the amplifier displays which level of bias the amplifier is utilizing.
OPERATION FRONT PANEL METER BUTTON A small button beneath the Power button on the front panel controls Bias Meter display illumination. When engaged, the meter display will no longer indicate bias levels; only the Blue pilot LED will be visible. The Bias Level meter can also be turned on or off via the remote control.
OPERATION REMOTE CONTROL FUNCTIONS The KSA-100S/200S/300S are the first high performance amplifiers to utilize remote control functions. The amplifiers can be switched on or offand the meter function can be changed from your listening position via the hand- held remote control.
OPERATION PROTECTION CIRCUITRY There are no fuses in the KSA. The amplifier is protected by a series of non- intrusive, opto-coupled 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.
OPERATION Should the amplifier turn off when either output cable is connected, the problem is cable or speaker related. Check to make sure there are good mechanical connections on the speaker cabling and there are no frayed ends or wires shorting the output terminals together.
QUESTIONS AND ANSWER Q. Should I leave the KSA on at all times? A. Because of Sustained Plateau Bias, the KSA can be left on at all times without fear of damage, excessive heat or excessive power consumption. The KSA amplifier however, is designed to be turned On/Off, and can do so without degradation.
QUESTIONS AND ANSWER Q. My speakers axe only rated for 150 watts, is the KSA-200 or KSA-300 going to be too much power for them? A. Seldom do you break a speaker by over powering it. Usually lower powered amplifiers will clip driving a loud speaker during heavy demand situations and consequentially damage the speaker.
SPECIFICATIONS AMPLIFIER THD (1KHz/20KHz) GAIN SIGNAL TO NOISE INPUT SENSITIVITY INPUT IMPEDANCE OUTPUT VOLTAGE (PEAK TO PEAK/RMS) OUTPUT POWER 8 gl (ohms) it] DIMENSIONS LENGTH WIDTH HEIGHT SHIPPING WEIGHT KSA- 100S 0.1%/0.5% 26.0dB 100dB 1.4VRMS 47K 8O.
WARRANTY AND SERVICE THERE ARE NO USER-SERVICEABLE PARTS INSIDE THE KSA-100S/200S/300S. The KSA-100S/200S/300S has a limited and transferable warranty of five years for parts and labor.
KRELL 45 Connair Road Orange, CT 06477 SALES (203) 799-9954 FAX (203) 799-9796 © 1994 KRELL INDUSTRIES (KSA9406).
An important point after buying a device Krell Industries KSA-100S (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Krell Industries KSA-100S yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Krell Industries KSA-100S - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Krell Industries KSA-100S you will learn all the available features of the product, as well as information on its operation. The information that you get Krell Industries KSA-100S will certainly help you make a decision on the purchase.
If you already are a holder of Krell Industries KSA-100S, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Krell Industries KSA-100S.
However, one of the most important roles played by the user manual is to help in solving problems with Krell Industries KSA-100S. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Krell Industries KSA-100S along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
