Abbingdon Music Research Compact Disk Processor CD-77 - Manual (Page 33)

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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
Section 4 - Technical Features