Krell Industries KSA 150 / 250 owner manual B.Power Considerations, C.Unpacking

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. There is a 6dB increase in gain without an increase in noise and there is a decrease in overall system noise caused by stray AC and RF fields. Sonic performance is drastically improved, particularly in dynamic and soundstage presentation.

B.POWER CONSIDERATIONS

The KSA-150 is rated as delivering 150 watts per channel into 8 ohms. The amount of Class A power is adjusted for the finest sonic performance with a minimum of generated heat and energy consumption. The amplifier’s maximum power into 8 ohms is 220 watts per channel. The KSA-250 is rated as delivering 250 watts per channel into 8 ohms. The amplifier’s maximum power into 8 ohms is 320 watts per channel.

That every Krell product uses Class A circuitry in all gain and supply stages is a foundation of our design philosophy. A second design commitment 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 into 2 ohms and 2,000 watts per channel into 1 ohm. The KSA-250 is capable of driving impedances below 1 ohm.

Given the above, the AC power supplied to the amplifier is crucial to getting maximum performance. The KSA-150 will operate at its peak with a dedicated

20- amp line, although this is not a requirement. Additionally, the KSA-150 should only be operated with the power cord supplied with the unit. Use of other power cords may damage the amplifier and void its warranty. The KSA-250 requires a dedicated 20-amp line. It too, should only be operated with the power cord supplied with the unit.

Please consult Krell or your dealer before using any devices designed to alter or stabilize the AC power for the KSA-150 or KSA-250.

C.UNPACKING

Remove the unit, power cord and accessories from the shipping container. Store all packing materials in a cool, dry place for future use. Inspect the unit for shipping damage. If any damage is evident, contact your dealer immediately. If the unit is in proper condition, proceed with the installation.

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