Evolution DC Protection Circuitry/Using Tube Preamplifiers

The high DC output of tube preamplifiers may exceed the active DC protection circuitry of the Evolution amplifiers. Excessive DC level in a signal can damage amplifiers, loudspeakers, or both. The single-ended inputs of the Evolution ampli- fiers are capacitor-coupled and DC does not pass through. Therefore, if connect- ing a tube preamplifier, use the single-ended inputs only. For more information about DC protection circuitry features, see Error Codes on page 25.

Connection Steps

Position the amplifier where you intend to use it in your system.

The following steps describe how to connect an Evolution amplifier to your sys- tem:

1.Turn off all power sources and components before connecting inputs and out- puts.

2.Neatly arrange and organize wiring to and from the Evolution amplifier and all components. Separate AC wires from audio cables to prevent hum or other unwanted noise from being introduced into the system.

3.Connect the outputs of your preamplifier to the appropriate CAST (4), balanced (6), or single-ended inputs (5) on the Evolution amplifier.

Note

Connect the u-shaped jumpers between pins 1 and 3 of the XLR connectors when using single-ended inputs.

4.Connect the loudspeaker cables to the loudspeaker binding posts (7) on the Evolution amplifier. The binding posts accept spade lugs only. Take care to observe the correct polarity when making connections: The positive (+) output connects to the positive input of the loudspeaker. The negative (-) output con- nects to the negative input of the loudspeaker.

5.Connect the supplied AC power cord to the AC power cord receptacle (9).

6.Plug the AC power cord into AC power.

Note

Use only the power cord provided with the Evolution amplifier to make the connection to AC power. Operation with a power cord other than the one supplied by Krell could induce noise, limit current, or otherwise impair the ability of the amplifier to perform optimally.

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Krell Industries manual Evolution DC Protection Circuitry/Using Tube Preamplifiers, Connection Steps
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Evolution specifications

Krell Industries has established itself as a pioneer in high-performance audio equipment, renowned for delivering unparalleled sound quality and innovative technologies. Founded in 1980, the company quickly became synonymous with premium amplification, earning accolades from audiophiles worldwide. Over the years, Krell has evolved its product lineup to include not only amplifiers but also preamplifiers, digital audio players, and complete home theater systems.

One of the hallmark features of Krell products is their robust build quality. The company employs a strong engineering ethos that prioritizes durability and reliability in all its offerings. The iconic, heavy chassis of Krell components serves not only as a protective shell but also minimizes vibrations, which can adversely affect sound quality. This engineering strategy is evident in their signature line of amplifiers, which utilize high-grade materials and precision craftsmanship to ensure longevity and optimum performance.

Krell has also been at the forefront of technological advancements. The introduction of class A amplification circuitry is one such innovation that has been integral to the company's sound signature, allowing for minimal distortion and a rich, dynamic range. This technology ensures that even the most subtle nuances in music are reproduced with fidelity and clarity.

Moreover, Krell has embraced digital audio, creating DACs (digital-to-analog converters) and streaming devices that support high-resolution audio formats. This commitment to digital excellence reflects the company's understanding of evolving consumer preferences. Many of their devices feature wireless connectivity options, allowing users to stream music seamlessly from various sources without sacrificing audio quality.

In addition, Krell emphasizes user-friendly interfaces and versatility in its designs. Customers can often find features such as programmable presets, remote control functionality, and intuitive navigation systems, making it easier to tailor their listening experience.

Krell Industries’ evolution over the years showcases a dedication to audio fidelity, technological advancement, and stylish design. As the company continues to innovate within the high-end audio landscape, it maintains its reputation as a brand that audiophiles can trust, delivering exceptional sound experiences that stand the test of time.
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