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,

ACpower anomalies,

high ground resistance

and out-of-

phase ground. Collectively,

the

protection

circuitry

is

designed

to avoid

damage to

the amplifier or speakers

caused by other

defective

components,

faulty wiring,

mishandling

of

the

system

or

amplifier

failure.

When the

protection

circuit

is engaged,

the

amplifier

will

shut

off

and short

its output.

The amplifier can be turned on after resolving either the input or output problem.

SIMPLE TROUBLE-SHOOTING STEPS

Follow these steps when trying to resolve the cause of potential amplifier related failure. If the amplifier will not turn on, or stay on:

1.Disconnect all input and output connections. Once this is completed, try turning the amplifier on.

If the amplifier does not come on, check the circuit breaker on the back panel. If the circuit breaker has popped out or appears to be more extended than usual, reset the breaker switch by pressing it back in. If the amplifier still does not come back on, call KRELL.

If the amplifier does not come on and the circuit breaker on the back of the unit seems normal, check the house circuit breaker or fuse for the power outlet associated with the amplifier.

NOTE:When turning the amplifier on and off between cable checks, let the amplifier settle for at least 45 seconds before turning it back on.

2.If the amplifier turns on and appears to work properly again, turn the amplifier off and reconnect the output speaker cables for one channel only.

If the amplifier turns on normally, reconnect the other channel output speaker cables.

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Krell Industries KSA-200S, KSA-300S, KSA-100S manual Protection Circuitry, Simple TROUBLE-SHOOTING Steps

KSA-100S, KSA-300S, KSA-200S specifications

Krell Industries is renowned for its high-end audio equipment, particularly in the realm of amplification. The KSA series, which includes the KSA-300S, KSA-100S, and KSA-200S, showcases the brand's commitment to delivering superb sound quality, advanced technology, and exceptional build quality. Each model in this series brings its unique features and characteristics, appealing to audiophiles and music enthusiasts alike.

The KSA-300S stands out as a powerhouse amplifier, capable of delivering an impressive 300 watts per channel into 8 ohms. It utilizes Krell's proprietary Class A-AB design, which combines the efficiency of Class AB with the sonic purity of Class A. This model incorporates advanced thermal management systems, ensuring stability during extended listening sessions. The KSA-300S also features dual-mono construction, allowing for superior channel separation and minimizing crosstalk, resulting in an expansive soundstage with precise imaging.

Next, the KSA-200S offers a blend of power and finesse with its 200-watt output per channel, making it a versatile choice for various speaker types and room sizes. Like its larger counterpart, the KSA-200S employs a Class A-AB design, but its lighter footprint allows for easier placement in audio systems. The build quality is impeccable, featuring a robust chassis that minimizes vibration and enhances sound clarity. Additionally, it includes Krell’s advanced input stage, ensuring minimal signal degradation and optimal performance.

Lastly, the KSA-100S, with its 100-watt per channel output, is ideal for those who appreciate high-performance audio in a more compact package. Despite its smaller size, it retains many of the high-end features found in the larger models. The KSA-100S delivers exceptional dynamic range and musicality, making it perfect for smaller listening environments. It also employs Krell's unique cooling design, which allows the amplifier to maintain optimal performance without overheating.

In conclusion, Krell Industries' KSA series amplifiers represent the pinnacle of audio engineering. With their Class A-AB designs, advanced thermal management, and robust build quality, the KSA-300S, KSA-200S, and KSA-100S offer options for various listening environments and preferences. Whether you're seeking a powerful amplifier for large speakers or a compact solution for intimate audio spaces, the KSA series provides unparalleled performance and sonic excellence.