Krell Ksa 150 Service Manual

04.02.2020

Reviewed May 06th, 2014 by Top amplifier,i use mine with audio research sp11 mk2, accuphase trans, wadia dac, lp12,ittock lv2, and sonus faber extremas. It gives everything i need, soundstage, nice bass,not too heavy,refined treble,not too fatiguing, obviously i would like a bit more power for the extremas,but it plays at more than adequate levels for my enjoyment!! I have owned a few of the older class a ksl krells in the past,and although they sound ok bass wise,the treble i found was characteristically glassy!

Krell ksa 150 amp

Which i found to be the case with the 3 i have owned.This one is the only one i have been able to listen to for more than one hour! I thought i would take a chance once again getting another krell and i chose this one,and i am glad i did!

. 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. GENERAL INFORMATION The latest generation of high-resolution source components and speakers places new demands on the power amplifier. The Krell KSA 150 and KSA-250 meet these challenges with fresh design sophistication and long-term value. Both products can drive any speaker with an effortless quality that makes their power seem endless. protective action exists for a wide range of problematic conditions. Collectively, the protection circuitry is designed to avoid damage caused by other defective components, faulty wiring, mishandling of the system or amplifier failure. Krell is committed to balanced operation in all products.

Balanced systems have long been standard in professional audio applications and the same advantages apply to home audio equipment. INSTALLATION 1. CAUTIONS: These are important points of which you should always be aware. Do not connect the power cord into the AC mains before completing the entire installation. The unit must always be turned off while making connections. Krell XLR and custom RCA connectors are made to very exacting standards.

The input that is not connected to the preamplifier may be used as an output to a second amplifier for power bi-amp applications. Before proceeding with such an installation, you should consult your dealer or Krell. The KSA-150 and KSA-250 are shipped with shorting pins in the XLR inputs. These pins must remain in the XLR inputs if the units are to operate in the single- ended mode. At this pint the amplifier’s outputs are not connected to the speakers.

After the protection circuits detect that the unit has completely stabilized, the speaker relays will engage. Another click will be heard at this point. The amplifier is now ready to use.

Krell Ksa 150 Review

The amplifier will be at temperature and sound its best after approximately 15 minutes. IMPORTANT NOTES REGARDING PROTECTION CIRCUITRY 1. When the Output Protection circuitry has been engaged, allow at least 20 seconds before turning on the amplifier again. Repeated fast cycling of the On/Off switch can damage the amplifier and void the warranty.