Accuphase DP 77 Brochure
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SACD/CD Transport Section Features and Functions Connection examples for effective use of SACD/CD transport ~Accuphase Original Digital Interface~ HS-Link: High Speed Link DP-77 Block DiagramHS-Link Block Diagram Connection to DC-300 for SACD/CD playback and digital connection to DG-28 for sound field compensation Digital connection to DC-330, DF-35 for multi-amped system Coaxial digital cableHS-Link cable Coaxial digital cable HS-Link cable HS-Link cable Assembly with transport outputs and digital inputs (optical, coaxial) HS-Link Output Board DO2-HS1 installed in DP-77 Rediscover what the Compact Disc is all about Integrated SACD/CD player with MDS Plus type D/A converter. Transport section features single lens/twin pickup high-speed access mechanism. Processor handles latest formats such as 2.8224 MHz/1-bit and 192 kHz/24-bit. Separate construction of transport and processor sections and respective connectors allow independent use. HS-Link input/output board available as option. The integrated SACD/CD player DP-77 is based on the superior know-how gained through the development of the separate type player combo DP-100 and DC-101, using the latest advances in digital technology. This player lets you fully enjoy the wide frequency range and amazing dynamics of the SACD format. But the DP-77 also brings out hidden musical qualities inherent in conventional CDs, letting you hear even familiar recordings like you've never heard them before. The transport section of the DP-77 features a dedicated DSP for the digital servo circuitry, assuring highly precise processing of the digitalSACD signal recorded according to the DSD principle. The highly critical laser pickup section features a single lens/twin pickup high-speed access mechanism to achieve totally accurate signal readout. The processor section uses the latest in sophisticated digital technology to provide support also for 2.8224 MHz/1-bit and 192 kHz/24-bit sources. The D/A converter section which has a crucial effect on sound quality employs the MDS Plus principle, with multiple strictly selected Delta Sigma converters in a parallel configuration, assuring unprecedented conversion precision. The SACD/CD transport section and theprocessor section of the DP-77 are kept entirely independent of each other, to achieve optimum performance in each regard. This manifests itself in utterly authoritative sound. Thanks to transport outputs and digital processor inputs, the two sections can be used separately as well. An optional HS-Link Board is available for combination with the DC-330/DP-100 or for high-quality sound field compensation with the DG-28/DG-38, including wide-range sources. Even multi-amping with the DF-35 is possible, opening up a whole world of high-class audio possibilities. Digital servo with dedicated DSP assures highly accurate signal pickup for SACD and CD Plays also regular CDs with impressive quality Single lens/twin pickup mechanism mini- mizes access time Strong, precision-machined chassis with resonance and vibration resistant construction "High Carbon" cast iron insulator feet with superior damping characteristics further enhance sound quality Multi-function remote commander RC-28 supplied as standard equipment Optional HS-Link output board for SACD/CD transport section Dedicated coaxial and optical connector for CD signal output The DP-77 provides output facilities of the SACD/CD transport section to allow flexible combinations. By installing an HS-Link option board, the unit can be used with a DC-330 for SACD/CD playback. From the DC-330, the digital signal can be further routed to the Voicing Equalizer DG-28/ DG-38, the Channel Divider DF-35, etc. This offers a host of possibilities for creating a multi-amplified system entirely in the digital domain. HS-Link is an ultra high-quality digital audio interface developed by Accuphase using latest digital signal transmission technology. It supports send/receive verification for copyright protection. The LVDS (Low Voltage Differential Signaling) principle allows a single dedicated HS-Link cable to transmit signals using advanced digital audio formats such as 2.8224 MHz/1-bit or 192 kHz/24-bit. Because digital audio data are transmitted with utmost fidelity, the sound quality achieved by HS-Link is simply outstanding. Power amplifierPower amplifier Power amplifier Because DG-38 incorporates HS-Link, direct connection with a HS-Link cable is possible. DI2-HS1 installedDIO2-DG1 installed in EXT DSP slot (uses 2 slots)Analog output DI2-HS1 installedDO2-HS1 installed in OUTPUTS slotDI2-HS1 installedAnalog output (2-way configuration) Using HS-Link, it is possible to keep the connection of entirely in the digital domain until directly before the power amplifier. The various components are connected with HS-Link cable. For 5-way con- figuration and higher: add- itional DF-35
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Digital Processor Section Features and Functions Ultra Jitter-Free PLL Circuit [MDS Plus Type] D/A Converter Supplied remote commander RC-28 Functions include input switching, output level adjustment, direct play, repeat, program, shuffle, etc.Assembly with master clock generator, DAI encoder/decoder, ultra jitter-free PLL circuit, and other digital signal processing circuits Digital processor supports new generation formats with high sampling rates such as 2.8224 MHz/1-bit and 192 kHz/24-bit MDS Plus type D/A converter achieves stunning performance and sound quality Ultra jitter-free PLL circuit topology totally eliminates pulse distortion Fully separate processor section with coaxial and optical digital inputs Ultra high-speed digital coupler ensures effective separation between digital and analog sections Digital level control with adjustment range 0 dB to –60 dB Balanced and unbalanced analog outputs MDS (Multiple Delta Sigma) is a revolutionary design which employs several delta sigma type converters in a parallel configuration. In the combined output of these multiple converters, conversion errors cancel each other out, resulting in a drastic improvement in all relevant aspects of converter performance: accuracy, S/N ratio, dynamic range, linearity, THD, etc. In the MDS Plus type converter employed in the DP-77, this principle has been further refined by enhancing the current-to-voltage converter in the signal adder section for even better stability and top-notch performance. The DP-77 uses four delta sigma converters inparallel, which results in an overall performance improvement by a factor of 2 (= 4) Assembly with MDS Plus D/A converter, analog outputs, etc. This original Accuphase development employs a phase-locked loop (PLL) circuit to extract a highly precise master clock from the input signal to be used as reference for D/A conversion. As shown in the diagram, the circuit consists of a preamble detector and a voltage-controlled oscillator (VCO) using a quartz crystal element. The master clock produced by this PLL circuit is totally free from the effects of pulse distortion and jitter. MDS Plus type D/A converter principle Note the ratio of signal level vs. conversion error level: in the MSD output, the conversion error is much smaller in relation to the signal level. Digital inputConversion error (Signal) MDS output Signal (Conversion error)DAI input signalPreamble detector Preamble signal (pulse distortion removed) Phase comparatorLoop filter Master clock output Frequency divider Principle of ultra jitter-free PLL circuit