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KRELL,  

 

THE LEADER IN AUDIO ENGINNERING 

 
 

 

KSA – 150 / 250 OWNER’S MANUAL 

 

 
INTRODUCTION 

 
Thank you for your purchase of the new Krell KSA-150 or KSA-250 Power 
amplifier. The KSA-150 and 250 represent the absolute latest evolution in 
amplifier technology. They have many innovative design features in addition to 
Krell refined Class A power and direct-coupled circuitry from input to output. 
 
There are several aspects of the KSA-150 and KSA-250’s operation that require 
your special attention before installation. Because of the high level of 
performance capabilities of the KSA-150 and 250, careful placement and 
installation are crucial. Your thorough understanding of the operation and 
interrelation of your new amplifier with your audio system will ensure its 
maximum performance and long life. 
 

ABOUT THE OWNER’S MANUAL 
 

The Owner’s Manual is divided into various groups of information. The purpose 
of the manual is to familiarize you with the product and guide you through its set-
up, installation and operation in a logical progression.  
 

TABLE OF CONTENTS 

 

A. 

General Information: A description of the basic design and 
performance features of the KSA-150 and KSA-250 

B. 

Power Considerations:  Your new power amplifier and its electrical     
requirements 

C.       Unpacking 
D.       Installation: Cautions, unit location guidelines, and connection of inputs              
           and speakers 
E. 

Operation 

F. 

Protection Circuitry 

G. 

Warranty and Service Information 

 
 
 
 

Summary of Contents for Power Amplifier KSA 150 / 250

Page 1: ...d installation are crucial Your thorough understanding of the operation and interrelation of your new amplifier with your audio system will ensure its maximum performance and long life ABOUT THE OWNER S MANUAL The Owner s Manual is divided into various groups of information The purpose of the manual is to familiarize you with the product and guide you through its set up installation and operation ...

Page 2: ...ated at 150 and 250 watts per channel into 8 ohms respectively The 150 will actually generate 220 watts into 8 ohms and the 250 will generate 320 watts into 8 ohms The 8 ohm power ratings do not account for the amplifiers superb sonic performance nor describe their maximum power The Krell definition of power and the ability to drive low impedances is that the output must double into successively l...

Page 3: ...ment that relates to amplifiers is that every unit be capable of doubling its output into successively lower impedances The KSA 150 will deliver 300 watts per channel into 4 ohms 600 watts per channel into 2 ohms and 1 200 watts per channel into 1 ohm The KSA 150 is fully capable of driving impedances below 1 ohm The KSA 250 will deliver 500 watts per channel into 4 ohms 1 000 watts per channel in...

Page 4: ...ed on shelving or in a cabinet extra ventilation is necessary This can be accomplished with the use of whisper type fans in a variety of ways Consult your dealer for assistance Generally with the front and rear of the installation shelving or cabinetry open 8 inches of clearance on the sides and top of the amplifies should provide adequate ventilation The dimensions of the KSA 150 are 19 wide X 16...

Page 5: ...g the cable thereby reducing the maximum power that can be delivered to the speakers The feet on the KSA 150 or KSA 250 can be used three different ways They are made from machined Delrin and are supplied with separate rubber bottoms and mounting screws The rubber bottom can be screwed into the Delrin for the protection of fragile surfaces such as hardwood floors or furniture For use on rugs or ca...

Page 6: ...he speakers to their limit Always turn the volume level down at the first sign of distortion When turning off the system the amplifier should always be first This avoids the possibility of a turn off transient occurrence from some other component to the speakers F PROTECTION CIRCUITRY The KSA 150 and KSA 250 have a sophisticated series of circuits that protect them from dangerous input signals or ...

Page 7: ...fiers have a limited warranty of five years from the date of purchase for parts and labor Return freight is included in the warranty Please return the warranty car immediately after successful installation and operation are completed The warranty for Krell products is valid only in the country to which they were shipped and at the Krell factory in Orange Connecticut USA If there are problems with ...

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