[Digital Processor Section]
MMB Type D/A Converter
The D/A converter in the processor section features the high-precision
MMB principle developed by Accuphase. Four D/A converters selected according
to strict sound quality criteria are connected in parallel, resulting in
dramatically improved linearity, THD, dynamic range, and signal-to-noise
ratio. Digital inputs allow use of this ultimate D/A conversion system
also with external components.
20-Bit, 8-Times Oversampling Digital Filter
The purpose of a digital filter is to multiply the sampling frequency by an integer, thereby moving any spurious noise components far outside the audible range.
The filter in the DP-65V is manufactured by NPC and offers state-of-the-art
characteristics in all vital aspects, such as absence of group delay, passband
ripple, and attenuation. The filter approaches the theoretical limits of
performance. The deemphasis stage features an IIR (Infinite Impulse Response)
design to assure precise gain and phase characteristics.
Totally Separate Processor Section With Coaxial and Optical Input for Digital
A digital input allows the user to enjoy the top-level performance of the processor section also with other components that can supply a digital signal, such as another CD transport unit, DAT recorder, MiniDisc recorder etc. For utmost flexibility, the input can handle both optical and coaxial connections. Internal processing of audio data is designed to manage all data from these inputs in 24-bit format.
Digital Level Control Prevents Sound Quality Deterioration
The 20-bit MMB D/A converter in the DP-65V has a 4-bit margin, which allows
precise level attenuation down to -40 dB without any loss in signal quality.
Provisions for Direct Connection of Digital Voicing Equalizer DG-28
Because the CD transport section and digital processor section in the DP-65V are entirely separate, the DIGITAL Voicing Equalizer DG-28 can be inserted into the signal path, to allow sound field control of the signal entirely in the digital domain.
Fully Balanced Analog Output Circuitry
The audio output section features completely balanced circuitry which is isolated from the ground line. Any noise that may be induced in the signal path will be canceled out, so that the playback sound remains utterly pure and undiluted.