Cambridgeaudio azur 640 p owners manual
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The 640P uses more exotic amplification circuitry to provide even lower distortion and noise plus the higher gain stage for MC cartridges. In addition, the 640P employs multi-parallel capacitors to achieve exceptional RIAA accuracy of only 0.3dB up to 50kHz and features a defeatable subsonic filter. Now we invite you to sit back, relax and enjoy! Matthew Bramble Technical Director 2 Azur phono pre-amplifier Thank yyou ffor ppurchasing tthis CCambridge AAudio aazur sseries pphono ppre- amplifier. IIt iis tthe rresult oof oou r oongoing rresearch aand ddevelopment program ffor oover tthree ddecades oof pproducing hhigh qquality aaudio produ cts. WWe hhope tthat yyou wwill aappreciate tthe rresults aand eenjoy mmany years oof llistening ppleasure. About tthis pphono ppre-aamplifier The design of a high quality but cost-effective phono pre-amplifer presents a major challenge. Providing first-class performance on an unlimited budget is one matter; achieving the same performance within tight price limits is quite another, and requires all the expertise and experience that Cambridge Audio brings to its product design process. We believe we have succeeded in our aim of creating a first-class affordable product. The 540P features a moving magnet stage whilst the 640P offers moving magnet and moving coil stages. Both use discrete transistors for the all-important input stages instead of the more common integrated circuits. Both are designed to produce high gain and linearity, without requiring massive amounts of negative feedback to achieve low distortion. These new models also employ a single-ended Class A gain stage with audiophile passive RIAA equalisation. High quality components are used throughout such as 1% metal film resistors and close tolerance polypropylene capacitors. INTRODUCTION
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540P/640PPhono pre-amplifer Azur phono pre-amplifier 3 Introduction .................................................................................................2 Important safety Information......................................................................3 Rear panel connections..............................................................................4 Troubleshooting......................................................................................... 6 Specifications ............................................................................................6 Limited warranty....................................................................................... 7 CONTENTS Please take a moment to read these notes before installing your Azur phono pre-amplifier, they will enable you to get the best performance and prolong the life of the product. We advise you follow all instructions, heed all warnings and keep the instructions for future reference. This unit must not be exposed to dripping or splashing water or other liquids. No objects filled with liquid, such as vases, shall be placed on the unit. In the event, switch off immediately, disconnect from the mains supply and contact your dealer for advice. Do not route the power cable so that it can be walked upon or damaged by other items near it. Electronic audio components have a running in period of around a week (if used several hours per day). This will allow the new components to settle down, the sonic properties will improve over this time. If you do not intend to use this unit for a long period of time, unplug it from the mains socket. To clean the unit, wipe its case with a moist, lint-free cloth. Do not use any cleaning fluids containing alcohol, ammonia or abrasives. Do not spray an aerosol at or near the amplifier. These units are not user serviceable, never attempt to repair, disassemble or reconstruct the unit if there seems to be a problem. A serious electric shock could result if this precautionary measure is ignored. In the event of a problem or failure, please contact your dealer. IMPORTANT SAFETY INSTRUCTIONS