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

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Krell Industries KSA 150 / 250 owner manual Introduction, Table of Contents

KSA 150 / 250 specifications

Krell Industries has long been a leader in high-end audio equipment, and their KSA 150 and KSA 250 amplifiers exemplify this commitment to excellence. Both models are celebrated for their exceptional performance, build quality, and innovative technologies, aimed at delivering pure, accurate sound reproduction.

The KSA 150 and KSA 250 feature a unique class A design, which is fundamental to their sonic performance. Class A amplification is known for its low distortion and high linearity, allowing these amplifiers to deliver a clear and dynamic audio experience. The KSA 150 provides an output power of 150 watts per channel into 8 ohms, while the KSA 250 ups the ante with 250 watts per channel into 8 ohms, making them suitable for even the most demanding speakers.

One of the standout characteristics of these amplifiers is the robust power supply and large transformer design. The dedicated power supply ensures ample current delivery, which is crucial for maintaining control over the speaker drivers and providing the energetic dynamic range that listeners appreciate. Krell's proprietary circuitry design further enhances performance by minimizing feedback and ensuring that the amplifier maintains its integrity even at high output levels.

Both models incorporate advanced thermal management technology. With their large heat sinks and efficient cooling systems, the KSA 150 and KSA 250 can dissipate heat effectively, allowing for continuous operation without risk of overheating. This engineering not only prolongs the life of the components but also ensures consistent performance during extended listening sessions.

Another feature of the KSA series is the balanced and unbalanced input options, providing flexibility for various audio setups and ensuring compatibility with a wide range of source components. This adaptability is crucial for audiophiles who often shuffle equipment to achieve the best sound.

In terms of aesthetics, the Krell KSA amplifiers are designed with a modern yet classic appearance that complements high-end audio systems. The sturdy chassis and premium finishes reflect the attention to detail and craftsmanship synonymous with the Krell brand.

Overall, the Krell KSA 150 and KSA 250 amplifiers represent the pinnacle of audio engineering, making them a perfect choice for enthusiasts seeking top-tier sound quality and performance. Whether for home theater or high-fidelity listening, these amplifiers deliver an unparalleled audio experience that continues to impress both critics and consumers alike.