Abbingdon Music Research CD-77 owner manual Technical Features

Section 4 - Technical Features

The following section provides a brief explanation of the most salient technical features of the CD-77.

The original Philips TDA1541A digital-to-analogue converter in AMR’s testing and auditioning remains to-date, the most musically satisfying chipset for digital-to-analogue conversion.

OptiSignal® conditioning circuit has optimised every single operating parameter of the Philips TDA1541A including off as well as onboard circuits.

OptiSample® digital engine is AMR’s incorporation of the most advanced digital filter yet: the Digital Signal Processing (DSP) engine from Texas Instruments.

OptiClockLock® system ensures all the clocks in the CD-77 are purposely synchronised to one temperature- compensated, low-jitter master clock module with its dedicated power supply.

OptiDrive® transport mechanism ensures reading of the compact disk is virtually without errors or jitter.

OptiReg® digital power supply is the employment of 14 different, but specifically designed regulators that combine to virtually eliminate digital noise.

OptiValve® analogue output stage uses NOS valves in dedicated circuits for the amplification, rectification and output stages.

OptiMains® will ensure the correct voltage is always supplied to the relevant internal sub-sections.

OptiTrans® power supply transformers are advanced double C-Core types which sonically, are superior to R- Core and comprehensively outclass traditional EI and toroidal transformers.

For a more detailed explanation of these and other features, please go to: www.amr-audio.co.uk

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