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User manual Cambridge Audio, model AZUR 540A

Manafacture: Cambridge Audio
File size: 12.15 mb
File name: Azur_540A-640A_owners_manual(ml).pdf
Language of manual:ruitenesfrdenlda
Free link for this manual available at the bottom of the page

manual abstract

I IIt is t tthe r rresult o oof o oour m mmost e eextensive e eever r rresearch a aand d ddevelopment program i iin o oover t tthree d ddecades o oof p pproducing h hhigh q qquality a aaudio p pproducts. We h hhope t tthat y yyou w wwill a aappreciate t tthe r rresults a aand e eenjoy m mmany y yyears o oof listening p ppleasure. About t tthis a aamplifier The design of any purist audio amplifier is mainly centred on two main areas, the Power Supply and the driver stage's ability to drive the output stage effectively. We at Cambridge Audio have researched the best possible ways to achieve the highest performance in these areas, at a sensible price. The Azur 540A/640A topology uses the same tried and tested output devices that Cambridge Audio have used in previous award winning amplifier models, but many hours of research have gone into the study and development of the preceding stages. This driver circuitry is essentially a matched differential input pair, loaded by a current mirror and driven from a transient compensated current source driving a high beta cascoded voltage gain stage. The thermally compensated output stage is setup to inherently give optimum Class AB conditions (for greatly reduced cross over distortion caused by dynamic heating of the output dies). In addition the topology includes a further improvement to the driver stage consisting of a pure class-A follower to isolate the voltage amplifier transistors from the difficult loading of the output transistors. This increased current drive to the output stage combined with a novel transient feed forward circuit doubles the slew rate to 40V/uS. Due to critically refined circuit board layouts, careful component placement and short signal paths the stability of these amplifiers is extremely high which allows the compensation components to be 2 reduced in size. This has the effect of reducing distortion, increasing dynamics and allowing the bandwidth to be opened up to a massive 80kHz, ideal for the new 'better than CD' high bandwidth sources such as DVD-Audio and Super Audio CD. The performance of any amplifier is limited by the dynamic abilities of its power supply, and for this reason Cambridge Azur amplifiers incorporate many features, including a low flux toroidal transformer, paralleling of the reservoir capacitors and careful use of bypass capacitors, to allow the instantaneous clean delivery of charge whenever it is needed. This ensures an open and natural sound being reproduced and ensures a positive response to any dynamics or sudden transients in the signal being reproduced. Particular attention has also been paid to the quality of the passive components which have been carefully chosen for their sonic benefits. The Azur 640A in addition uses high grade Polypropylene signal bypass capacitors to improve signal flow and dynamics. The Cambridge Audio Azur 540A and 640A amplifiers also incorporate tone controls, which may be switched out of circuit in 'direct' mode for the shortest and therefore purest signal path. Other features include 24k gold plated phono sockets, dual tape loops, pre amp output, a headphone socket and a secondary set of high level loudspeaker terminals. An important feature which has been included as standard on both the 540A and 640A is the new innovative Cambridge Audio designed CAP5 protection system. This consists of a microprocessor which constantly monitors the amplifier providing comprehensive protection against a variety of possible faults. This has been achieved without adding any active circuitry into the signal path to degrade the sound or the dynamic abilities of the amplifier. Cambridge Audio has built up an extensive knowledge base due to meticulous listening and tweaking. This attention to detail results in amplifiers that are totally convincing in the reproduction of both tonal colour and dynamic contrast, deliver a vibrant and fluid performance with music of all types and are extremely musically involving. To get the absolute best from this equipment we would encourage you to use only high quality source components. Of course we particularly recommend tuners and digital equipment from the Cambridge Audio range, all of which have been designed to the same exacting standards as our amplifiers. Many types of loudspeakers were used in the development of these amplifiers to ensure maximum compatibility with a wide variety of designs. Interconnects and speaker cables are also something that shouldn't be overlooked. Please do not compromise your system's performance by using poor quality cables to connect source components to your amplifier or the amplifiers output to your loudspeakers. A system is only as good as its weakest link. For this reason we do not include cheap "freebie" cables with any of our products. Your dealer can supply good quality Cambridge Audio interconnects and Mordaunt Short/Gale loudspeaker cables that will make a noticeable improvement to the sound quality of your system. Now w wwe i i...

Other models in this manual:
Home Theater Systems - AZUR 540A (12.15 mb)


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