Accuphase dc 801 brochure

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Accuphase Exclusive Digital Interface HS-Link is an ultra high-quality digital audio interface developed by Accuphase using latest digital signal trans- mission technology. It supports send/receive veriﬁ cation for copyright protection. The LVDS (Low Voltage Differ- ential Signaling) principle allows a single dedicated HS-Link cable to transmit all audio data with utmost ﬁ delity. Sampling frequencies 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz (16 to 24 bit, 2-channel PCM) 176.4 kHz, 192 kHz (24 bit, 2-channel PCM) 2.8224 MHz (1 bit 2-channel DSD) n Capability to carry the SA-CD signal as well as conven- tional digital audio formats such as CD, MD, CD-R, etc. n Transfer rate: 1923 Mbps (logical limit) n Transfer signal format: Low Voltage Differential Signaling (LVDS) TIA/EIA-644 n Send/receive clock fully synchronized n Full bidirectional capability with simultaneous send/receive n Full security capability with send/receive veriﬁ cation n Cable type: Shielded twisted pair 8-conductor OFC cable (equivalent to TIA/EIA-568A CAT.5) HS-Link cable (supplied with DP-800) n DP-800 and DC-801 connected with HS-Link cable HS-Link block diagram The D/A converter that forms part of the MDSD type moving-average ﬁ lter circuit is an MDS++ D/A converter with an amazing eight circuits operating in parallel, ensuring the utmost in accuracy and sound quality. MDS (Multiple Delta Sigma) is an innovative approach that employs several delta sigma type converters in a parallel conﬁ guration for greatly improved accuracy. Combining the output signal from individual converters causes mutual cancellation of conversion errors, resulting in a notable improvement in all relevant aspects of conversion performance: accuracy, S/N ratio, dynamic range, linearity, and THD. MDS++ D/A Converter with eight circuits operating in parallel Signal Conversion error Digital input (Signal) (Conversion error) MDS output Note the ratio between signal and conversion error. In the MDS output, the error is very small in relation to the signal. n MDS type D/A converter principle n Eight delta sigma converters n Block diagram of MDS++ principle 8 DACs driven in parallelCurrent summingVoltage summing (Normal phase output) (Reverse phase output) I (Current) - V (Voltage) converter SubtractionDAC output Ultra Jitter-Free + PLL circuit Direct Balanced Filter circuit Preamble detector Phase compa- ratorLoop ﬁ lter Divider Preamble signal pulse distortion removed DAI signal input Master clock output Optimized clock divi- sion ratio The operation of the D/A converter must be synchro- nized with the digital input signal. For this purpose, a phase-locked loop (PLL) circuit is used to extract the master clock which is used as system reference. In the DC-801, this important task is handled by a further im- proved circuit called Ultra Jitter-Free + PLL. The output of any D/A converter contains so-called aliasing noise in the very high frequen- cy range. An analog ﬁ lter designed to remove that noise is therefore always required. The ﬁ lter circuitry in the DC-801 uses 5-pole Butterworth analog ﬁ lters with extremely ﬂ at fre- quency response in the passband. In order to prevent unwanted interaction, the low-pass ﬁ lter conﬁ guration is completely separate for the balanced and unbalanced signal paths. n Front panel n Front panel n Rear panel n Rear panel SA-CD/CD indicator Track display Index display Time display Repeat indicator REPEAT / 1 / A-B Program indicator Power switch SA-CD/CD button MODE button ENTER buttonDisc tray Disc tray open/close button Play button Pause button Track search buttons BACK, NEXT Stop button Digital output connectors HS-LINK (SA-CD/CD signal) COAXIAL (CD signal only) AC power connector + Alphanumeric input display Function indicators LOCK, MDSD, EXT DSP Output level display Power switch Input selector buttons OPTICAL 1, 2, COAXIAL 1, 2, 3 BALANCED, HS-LINK Output level control buttons DOWN, UP EXT DSP button Digital input connectors HS-LINK, BALANCED COAXIAL 1, 2, 3, OPTICAL 1, 2 Analog output connectors UNBALANCED, BALANCED EXTERNAL DSP connectors INPUTS (HS-LINK, COAXIAL) OUTPUTS (HS-LINK, COAXIAL) DIGITAL output connectors COAXIAL, OPTICAL AC power connector + Remarks + This product is available in versions for 120/230 V AC. Make sure that the voltage shown on the rear panel matches the AC line voltage in your area.+ The shape of the AC inlet and plug of the supplied power cord depends on the voltage rating and destination country. m Compatible disc formats 2-channel SA-CD CD m Data read principle Non-contact optical pickup m Laser diode wavelength SA-CD: 650 nm CD: 780 nm m Digital outputs HS-Link Connector type: RJ-45 Suitable cable: Dedicated HS-Link cable COAXIAL Format: IEC 60958 m Power requirements AC120 V/230 V (Voltage as indicated on rear panel) 50/60 Hz m Power consumption 18 W m Maximum Dimensions Width 477 mm (18-5/16") Height 156 mm (5-7/8") Depth 394 mm (15-5/8") m Mass 26.6 kg (58.6 lbs) net 32.0 kg (70.5 lbs) in shipping carton Supplied with DP-800m AC power cordm HS-Link cable (HDL-15)m Remote Commander RC-100m Cleaning cloth Supplied with DC-801m AC power cordm Audio cable with plugs (1 meter)m Cleaning cloth m Digital inputs HS-Link Connector type: RJ-45 Suitable cable: Dedicated HS-Link cable COAXIAL Format: IEC 60958 OPTICAL Format: JEITA CP-1212 BALANCED Digital balanced cable: characteristic imped- ance 110 ohms Sampling frequencies 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz (16 to 24 bit, 2-channel PCM) HS-Link only 176.4 kHz, 192 kHz (16 to 24 bit, 2-channel PCM) 2.8224 MHz (1 bit 2-channel DSD) m Digital outputs COAXIAL Format: IEC 60958 OPTICAL Format: JEITA CP-1212 m D/A converter MDSD principle (DSD signal) MDS++ principle (PCM signal) m Frequency response 0.5–50,000 Hz +0, –3 dB m Total harmonic distortion 0.0006% (20 to 20,000 Hz) Optional cablesm HS-Link cable HDL-15 (1.5 m) > 3 m, 5 m, 7.5 m, 10 m also available m Signal-to-noise ratio 117 dB m Dynamic range 117 dB (24-bit input, low-pass ﬁ lter off) m Channel separation 113 dB (20 to 20,000 Hz) m Output voltage and impedance BALANCED 2.5 V 50 ohms, balanced XLR type UNBALANCED 2.5 V 50 ohms, RCA phono jack m Output level control 0 dB to –80 dB (digital) m Power requirements AC120 V/230 V (Voltage as indicated on rear panel) 50/60 Hz m Power consumption 22 W m Maximum Dimensions Width 477 mm (18-5/16") Height 156 mm (5-7/8") Depth 393 mm (15-1/2") m Mass 22.3 kg (49.2 lbs) net 28.0 kg (61.7 lbs) in shipping carton DP-800 Guaranteed Speciﬁ cations DC-801 Guaranteed Speciﬁ cations [Guaranteed speciﬁ cations are measured according to JEITA standard CP-2402A) m Speciﬁ cations and design subject to change without notice for improvements. http://www.accuphase.com L0605Y PRINTED IN JAPAN 851-0162-00 (AD1) HS-Link: High Speed Link DP-800DC-801 + +

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PRECISION SA-CD TRANSPORT Newly developed high-rigidity, high-precision SA-CD/CD drive Dedicated digital-output SA-CD/CD transport – Totally new ultra-massive SA-CD/CD drive. Highly rigid, high-precision construction with low center of gravity absorbs vi- brations. Finely machined and utterly smooth disc loading mechanism with exquisite tray. High-performance digital audio interface HS-Link. In order to extract the minute bits of information from the rapidly spinning disc and decode these accurately into a digital signal of high purity, vibrations emanating from the rotating medium as well as any external mechanical vibrations must be minimized. At the same time, the prevention of resonances is also highly important. In the DP-800, the SA-CD/CD drive is mounted ﬁ rmly to a strong aluminum frame, and the drive loading mechanism and mechanical base form a massive and highly rigid chassis constructed with utmost precision. Conversely, the traverse mechanism, an integrated structure consisting of the optical assembly including laser pickup and rotating parts, is designed for extremely light weight, and isolated from the mechanism base by a ﬂ oating suspension arrangement. Specially selected material is used for viscous damping, supporting the traverse mechanism at four points. A large, heavy bridge machined from a single block of aluminum is joined to the mechanism base for integrated reinforcement. The entire SA-CD/CD drive assembly is directly mounted to the bottom chassis. The resulting unit has a very low center of gravity and affords excellent protection against all kinds of adverse inﬂ uences from vibrations. Perfectly stable and quiet operation produces a signal of utmost accuracy. Sturdy, heavyweight chassis absorbs external vi- brations Highly rigid and precise construction Traverse Mechanism with ﬂ oating design and viscous damping Integrated construction with oversize heavyweight aluminum alloy bridge mounted to mechanism base Low center of gravity further reduces vibrations High-quality disc tray extruded from an aluminum block, plus super-quiet smooth disc loading mech- anism Advanced High Carbon cast iron insulators with excellent absorption characteristics control vibra- tions to ensure high sound quality High-rigidity, high-precision SA-CD/CD drive Aluminum alloy bridge Traverse mechanism Disc tray Mechanism base Viscous dampers Advanced High Carbon cast iron insulators for best sound quality For some time now, Accuphase engineers have been engaged in an ambitious in-house development project: to create the ultimate SA-CD drive. With the introduction of the DP-800, this project has now come to fruition, culminating in the SA-CD transport mechanism incorporated in this model. Compared to a CD drive, an SA-CD drive has a higher revolution rate, and pickup positioning accuracy as well as suppression of vibrations must be of a higher order, to allow full access to the enormous amount of information stored on the disc. This in turn places formidable requirements on the mechanical construction of the drive. The transport in the DP-800 meets these challenges in impressive fashion, being designed to extract the information on the SA-CD one-hundred percent. The product demonstrates ultimate mechanical precision matched with ingenuity and the famous Accuphase dedication to sonic excellence. The ultra-massive SA- CD drive combines superior rigidity with rock-stable accuracy. Truly a monumental event in the world of high- end audio. In the transport, a digital servo with a dedicated DSP assures accurate readout of the signal recorded on the SA-CD using the DSD (Direct Stream Digital) principle. This is sustained by a single-lens/twin laser diode pickup mounted to a high-speed access mechanism. The transport not only realizes optimal reproduction of SA-CDs, it also is capable of extracting a super- accurate signal from conventional CDs. The output for both SA-CD and CD is provided via the Accuphase exclusive high-performance digital interface HS-Link (RJ-45 connector), while the CD output is also available via a coaxial connector. The HS-Link cable supplied with the DP-800 can be used for connection to the DC-801 or to other components. DP-800 Features and Functions Newly developed high-rigidity, high-precision SA-CD/CD drive SA-CD transport supplies remarkably pure digital signal Excellent signal quality also from conven- tional CD media Single-lens/twin pickup high-speed access mechanism Support for text data display Accuphases proprietary digital audio interface HS-Link (carries both SA-CD and CD signal) Dedicated coaxial output for CD signal Power-on play feature allows automatic playback Remote commander RC-100 (supplied with DP-800) - Controls DP-800 functions such as direct play, program play, repeat, etc. - Controls DC-801 functions such as input switching and output level adjustment Both DP-800 and DC-801 feature massive cabinets made of persim- mons wood Digital signal processing assembly Power supply assembly HS-Link connector and coaxial output assembly Block diagram of DP-800