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Description
The Mono X is Cyrus' most advanced power amp, and features our latest advanced zero feedback design. It is conservatively rated at 150 Watts, however the dynamic power of the amp is capable of burst output (such as occurs in all music) of over 1,500 watts.
This gives the Mono X enormous dynamic range, meaning it is able to play very quiet and then very loud passages with apparent ease. Quiet passages take on an uncanny black background of silence, against which is it possible to hear minute details such as a conductor breathing, yet it can also instantly react to fast, loud bursts of music such as brass fanfare or a searing electric guitar, delivering exhilarating drama and awesome emotional power.
At is best when partnered with a Cyrus Pre XP, or a Cyrus DAC XP. It is of course MC-BUS compatible, making it suitable for us in AV or multi-room systems.
The power and subtlety of the Mono X make it one of the world’s most able hi-fi amplifiers.
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More Details
The X-series has been the most demanding product range developed to date by Cyrus. Over many months the team applied their established skills in taking a technically excellent amplifier design, and through incremental listening tests worked to achieve a natural and extended soundstage with outstanding bandwidth.
The Mono X power amplifier is packed with a long list of features including the famous Cyrus ‘zero-feedback’ circuit topology (delivering outstanding power with exceptional load tolerance), a massive power supply with many stages of voltage regulation and a sophisticated computer control system offering intelligent circuit protection, convection control to maintain the temperature of the amplifier within safe limits and local bus communications with other Cyrus components.
The harmonic distortion character of the Mono X is closely aligned to the response of the human ear. As output level reduces to lower levels where the ear becomes most sensitive to these effects, the distortion produced by the Mono X falls below measurable limits the result is exceptional musical resolution.
Power amplifiers have two primary tasks - i.e. voltage and current amplification of the input signal, to provide a large and powerful signal for the loudspeaker. Traditionally, in most power amplifiers, these functions are combined into one overall circuit topology. The Mono X splits these functions into dedicated circuits - the input voltage gain amplifier and the output current amplifier. The voltage gain amplifier uses a zero feedback complementary bootstrap cascoded 'class A' buffer which drives a precision resistor. The current developed in driving the resistor is mirrored in to another precision resistor which is 52 times greater in resistance. The voltage developed across the second resistor is 52 times greater, hence voltage gain. This voltage gain operation is buffered by a second zero feedback complementary bootstrap cascoded 'class A' buffer. The current amplifier is an error corrected bipolar emitter follower designed to drive equally well into all impedances. In the Mono X neither of these stages have any global feedback. The current amplifier completely isolates the precision voltage amplifier from the loading effects of the speaker. This arrangement enables the Mono X to preserve fine detail, even under the most arduous of dynamic conditions.
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