Krell Audio Components MRA

removable/interchangeable plug-in module, called a software key, can be individually programmed, allowing the Master Reference Amplifier to be customized to match the impedance curve of any given loudspeaker. In addition, this microprocessor- controlled, fully active regulation enables the Master Reference Amplifier to develop full power into the most demanding loads, with no drop in current or voltage. Only the Master Reference Amplifier has this feature, which continually monitors and adjusts the power source to compensate for even the smallest variation in current or voltage.

A new Krell technology contributes to the Master Reference Amplifier's superiority and further enhances Master Reference Amplifier performance when connected to appropriately equipped Krell source components. CAST, Current Audio Signal Transmission, has been developed to send audio signals from component to component without introducing the negative effects of interconnect cables into the signal, i.e., loss of gain, reduced slew rate, and tonal coloration. Moreover, it reduces the number of total gain stages in the system and unifies each component in the system. CAST technology serves as a current gain interface and preserves current gain circuitry throughout the entire system. This has never been possible before CAST technology because conventional audio components and interconnect cables interface via voltage gain. The preamplifier has high output impedance and delivers current, not voltage, to the amplifier. The amplifierÂ’s input senses and amplifies this current, which is not altered by interconnect cableÂ’s impedance characteristics because the cable imped- ance and reactive effects are reduced to at least a million times less than the total system impedance. CAST ensures that interconnects cable lengths and characteristics do not degrade the signal quality. As a result, listeners can employ long cable runs and still maintain signal integrity. This means listeners can place components where they wish to place them. CAST technology also renders obsolete the mysterious art of "matching" components and interconnect cables to achieve certain desired sonic results. CAST delivers accurate signal transmission without sonic coloration and takes the "guesswork" out of installing a reference system.

The Master Reference Amplifier's ability to resolve detail, recreate holographic imaging, convey impact, and preserve tonal balance is unparalleled. The basic function of the Master Reference Amplifier is to emulate a pure voltage and current source and to provide a superabundant amount of accurate power into any impedance load, ensuring maximum performance from every speaker system. The core technologies applied in the Master Reference Amplifier focus on this goal.

The Krell Current Mode gain stages within the Master Reference Amplifier ensure high quality sound performance. These stages operate in current mode, rather than voltage mode amplification. This is accomplished by parallel operation of many small signal transistors, which are selected specifically for their low self-noise, wide bandwidth, and high linearity. Krell Current Mode operation significantly boosts output drive capability. At the same time, the low impedance intrinsic to Krell Current Mode operation minimizes noise and preserves wide bandwidth operation.

Class A operation is by far the most desirable for performance, but pure Class A can cause reliability problems along with environmental and economic ones. The Master Reference Amplifier employs Class A operation managed by Sustained Plateau Bias II circuitry.

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Krell Industries Master Reference Amplifie manual Krell Audio Components MRA
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Master Reference Amplifie specifications

Krell Industries, a name synonymous with high-end audio, has consistently pushed the boundaries of what is possible in audio amplification. One of its flagship offerings, the Master Reference Amplifier, exemplifies the brand's commitment to excellence in sound reproduction. This powerful amplifier showcases innovative technologies, meticulous engineering, and a relentless pursuit of sonic perfection.

At the heart of the Master Reference Amplifier lies a robust power supply and state-of-the-art circuitry designed to deliver stunning audio performance. The amplifier employs Krell's proprietary Current Mode amplification technology. This design principle allows the amplifier to respond instantaneously to changes in the audio signal, resulting in superior transient response and remarkable clarity. With this technology, the Master Reference Amplifier can drive even the most demanding loudspeakers with absolute finesse.

One of the standout features of the Master Reference Amplifier is its impressive power output. With a staggering output of several hundred watts per channel, the amplifier easily handles large-scale orchestral music and dynamic film soundtracks without breaking a sweat. This high power output ensures that the music retains its integrity and details, no matter the volume level.

The amplifier is also equipped with advanced thermal management systems, including substantial heat sinks and fanless operation, allowing it to maintain optimal performance without the noise typically associated with high-output equipment. This attention to thermal performance ensures longevity and reliability, making it a worthy investment for audiophiles.

For connectivity, the Master Reference Amplifier includes balanced XLR and unbalanced RCA inputs, enabling seamless integration with various audio sources. It features a robust chassis design that minimizes vibrations and electromagnetic interference, helping preserve the purity of the audio signal.

The build quality of the Master Reference Amplifier is nothing short of exceptional. Constructed from premium materials, the amplifier exudes a sense of luxury and durability. The aesthetic design is equally appealing, with a sleek finish that complements any high-end audio setup.

In summary, Krell Industries' Master Reference Amplifier combines cutting-edge technology, immense power, and impeccable build quality. With its Current Mode amplification, exceptional thermal management, and versatile connectivity options, it stands as a pinnacle of performance in the world of high-end audio amplification. Whether for music lovers or cinema enthusiasts, the Master Reference Amplifier promises an unparalleled listening experience.
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