It is now safe to place the rest of the system in stand-by.
Powering Off
Krell recommends leaving Evolution amplifiers in the stand-by mode between lis- tening sessions. Turn the amplifier off using the power breaker switch (10), and disconnect the amplifier from AC power when the system is not being used for an extended period of time.
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Increase the volume control to the desired listening level.
With the preamplifier muted or its volume completely lowered, select a source.
3.
4.
5. To return the amplifier to stand-by, press the power button on the front panel. The power status indicator turns red, and the amplifier is in the stand-by mode.
Evolution Amplifier Operation
The Evolution amplifiers are easy to operate.
IMPORTANT
When powering up any system, turn the amplifier on last. When powering down, turn it off first. This will prevent any turn-on and turn-off thumps in your loudspeakers. Always mute or fully attenuate the preamplifier level when switching sources. Do not change input connections to the amplifier when the amplifier is on.
Krell amplifiers have large reserves of clean power that can safely drive loudspeakers to higher sound pressure levels than other amplifiers. Use care when setting high play- back levels, and lower the volume level at the first sign of loudspeaker distress.
On/Off and Stand-by Operation
1. Move the back panel power breaker switch (10) to the up position to place the amplifier in stand-by mode. The power status indicator (2) illuminates in red.
2. Press the silver power button (1) on the amplifier front panel. The power status indicator (2) illuminates in blue.
The initial power-up phase lasts approximately 30 seconds from the moment the back panel power breaker switch is placed in the up position. If the power button is pressed during this period, the power status indicator flashes blue for the remainder of the initial power-up phase. When the initial power-up phase is complete, the power indicator illuminates in blue and is no longer flashing. The amplifier is in the operational mode.

SECTION FIVE

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Krell Industries Evolution 600, 900, 400 manual Section Five

400, 900, Evolution 600 specifications

Krell Industries is a renowned namesake in the high-end audio and home theater equipment market, revered for its cutting-edge engineering and exceptional performance. Among its standout offerings are the Krell 900, Evolution 600, and Evolution 400, each designed for audiophiles seeking to elevate their listening experience.

The Krell 900 is a powerhouse amplifier that marries high-output power with a sophisticated design. Featuring Class A/B amplification, it operates with minimal distortion, ensuring that sound quality remains pure even at high volume levels. The unit boasts a massive power supply that allows it to handle a wide variety of speaker impedances effortlessly. With its robust build and a sleek, minimalist aesthetic, the Krell 900 is not only a technical marvel but also a visual centerpiece in any audio setup.

On the other hand, the Evolution 600 represents Krell’s commitment to harnessing the latest technology to achieve superior sound. This amplifier utilizes Krell’s proprietary current mode topology, which optimizes power delivery and offers instantaneous response to dynamic audio signals. The Evolution 600 is equipped with advanced thermal management systems that keep the unit cool during extended use, ensuring reliability and longevity. Furthermore, the elegant design complements any home decor, making it a stylish and functional addition to high-end audio environments.

The Evolution 400, while slightly smaller, exemplifies Krell’s hallmark of uncompromising sound quality. It integrates many of the same high-end technologies found in its larger counterparts but in a more compact form. With a focus on delivering dynamic range and clarity, the Evolution 400 is ideal for both music and home theater applications. Advanced digital signal processing, combined with analog audio circuitry, ensures that every note and detail is captured with impeccable accuracy.

All three models prioritize connectivity and user experience, featuring a range of inputs, including balanced XLR and unbalanced RCA options, allowing seamless integration into various audio systems. Each amplifier emphasizes robust build quality, featuring heavy-duty chassis and meticulously designed circuit layouts to minimize interference and signal degradation.

In conclusion, Krell Industries’ 900, Evolution 600, and Evolution 400 amplifiers exemplify the pinnacle of audio craftsmanship. They combine innovative technologies, premium components, and stunning aesthetics, making them the perfect choice for discerning audio enthusiasts who demand nothing but the best in sound reproduction.