DP-777 Premier Class Digital Processor Owner’s Manual Ver 1.0.
FCC Declaration of Conformity - United States only Canadian Notice (Avis Canadien) This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Class B Equipment FCC WARNING: This Class B digital apparatus meets all requirements of the Canadian Interference-Causing Equipment Regulations.
CAUTION - use of all controls, adjustment or performance of procedures other than specified herein may result in hazardous radiation exposure. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying this component. All warnings on the component and in its operating instructions should be adhered t o. Retain this Owner’s Manual for future reference.
Precautions This equipment has been tested and found to comply with the limits set out in the EMC Directive using a connection cable shorter than 3 metres. On power sources The mains power cable should be routed so that it is not likely to be walked on or pinched, especially near the plug or back panel receptacle. The component should not be disconnected from the AC power source as long as it is connected to the wall outlet, even if the component itself has been turned off.
Contents WARNINGS 3 Section 1 - Unpacking 1.1 Unpacking 7 Section 2 - Component Overview 2.1 DP-777 Front Panel 2.2 DP-777 Rear Panel 2.3 RC-707 Remote Control 9 10 12 Section 3 - DP-777 Operation 3.1 Power On/Off 3.2 Standby 3.3 Connection and Playback 3.4 Display Information 3.5 Zero Jitter 3.6 HD-Valve Digital input 3.7 Signal Polarity 3.
Section 4 - The HD Gemini Digital Engine 4.1 HD Gemini Digital Engine: 32/16-Bit DAC Selection 4.2 kHz Selection 4.3 HD 32-Bit Digital Algorithms 4.4 Classic 16-Bit DAC Digital Algorithms 4.5 Default Filter Selection 4.6 AMR Optimal Auto-Select 19 19 20 23 24 24 Section 5 - Computer Audio Resource 5.1 The Computer, Software and Digital Processor 25 Section 6 - Analogue Volume Control (AVC) 6 6.
Section 1 - Unpacking Thank you for purchasing this AMR Premier Class component. We hope you derive as much pleasure from using this component as we have enjoyed making it for you. 1.1 Unpacking This section refers to the unpacking of the DP-777 and its subsequent setup. Upon unpacking, please find: Please check that all contents are present i. DP-777 Premier Class Digital Processor. ii. RC-707 Remote Control. iii. DP-777 Owner’s Manual. iv. USB cable. v. BNC > RCA gold-plated adaptor. vi.
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Section 2 - Component Overview 2.1 DP-777 Front Panel F1. Standby: to place the DP-777 in active/standby mode. F2. Input: to select the previous/next input. F3. Analogue Volume Control: to increase/decrease volume in 1dB steps Note: at 0dB or “Byp” which is FULL volume, the Analogue Volume Control is automatically bypassed.
2.
Always power OFF before changing an input selection Optical NOT recommended for 176/192 kHz R1 & R2. Input 1/2: “HD-Valve Digital Input” Digital SPDIF BNC/XLR (switchable): able to accept standard XLR SPDIF signal of 5Vpp OR BNC standard SPDIF signal of 500mVpp. R3. Inputs 3 & 4 Digital SPDIF Coax & Optical: auto-detect standard coaxial RCA standard SPDIF signal of 500mVpp OR Optical standard SPDIF signal.
2.3 RC-707 Remote Control RD1. STANDBY: to place the DP-777 in active/standby mode. RD2.BRIGHTNESS: 4 different brightness levels including display off. RD3.kHz/SAMPLING: to cycle through the different output frequencies. RD4.ZERO JITTER: for the highest sound quality. When engaged, a small “J” will be displayed. When the GMT Clock System dynamically tracks a change in the clock frequency, the “J” will flash. RD5.INPUT selection: to select the previous/next input. RD6.MUTE: to mute the output. RD7.
Section 3 - DP-777 Operation This section will focus on optimising the DP-777 but please also refer to Section 5 for optimisation of the Computer Audio Source “CAS”. 3.1 Power On/Off Once powered OFF: Use the POWER rocker switch (R10) at the rear of the DP-777 to switch mains power ON/OFF. always wait 30 Always wait at least 30 seconds before switching on again. This is to enable the circuits in the DP-777 to shutseconds before switching on again down properly.
3.4 Display Information The front display of the DP-777 provides information about the playback status. The display contains a wealth of information The majority of the above display is self-explanatory. However, it is worth pointing out that the display will depict two sampling frequencies: the first is the input into the DP-777 which in the above example is from a CD transport hence 44.1kHz. The second frequency stated is the output sampling frequency by the DP-777 which in this case is 192kHz.
3.5 Zero Jitter The RC-707 remote control allows the user access the quite exceptional options of the DP-777. When the “Zero Jitter” option (set by default) is active, a “J” is displayed in the bottom left of the display. The “J” indicator will flash to confirm it has intelligently tracked the new frequency The DP-777’s Global Master Timing (GMT) and Intelligent Memory System (IMS) work to cancel out unwanted incoming jitter from the source.
GMT is the world’s first, selecting from 28 million different frequencies The Zero Jitter mode utilises the original innovative GMT/IMS to totally eliminate jitter coming from the source. AMR’s GMT clock system intelligently actualises over 28 million different real-time clock frequencies to exactly match the dynamic input clock down to 0.001Hz (i.e. ~0.04ppm accuracy) of the source.
...and HD-VDi, an In the DP-777, to overcome this set of essentially analogue problems we devised a completely analogue solution. analogue solution, is a AMR’s proprietary Valve Digital input technology (VDi) is a world’s first: it is the use of the 6N11 (high-speed world’s first valve operating into the 100MHz region) in a zero feedback circuit derived from military radar technology to re- establish the clean waveform of the original incoming signal from the two HD SPDIF Inputs.
3.7 Signal Polarity To invert signal polarity... In some instances, it may be more preferrable to listen to music with the signal phase inverted. The DP-777 ships with positive phase selected by default. No extra indicator will be lit. It is possible to press and hold the “AMR” button (RD7) in which case, a “-” indicator will be displayed to depict that the signal polarity has been inverted. 3.
Section 4 - The HD Gemini Digital Engine At the core of the DP-777 Digital Processor is the Gemini Digital Engine which has not one, but two high-end DACs. Each have been hand-selected by AMR as the most musical. This section provides an overview of the different DAC/Sampling/Algorithm Filter modes available so that the original signal can be kept in its native format for the maximum musical enjoyment. Or if listener so chooses, he/she may select playback using an alternative combination. 4.
4.3 HD 32-Bit Digital Algorithms The DP-777 under the HD 32-Bit DAC offers the following user-selectable Digital Algorithms: Organic / MP Listen / Apodising 808 / Traditional. Once the Sampling mode (RD3) has been selected, these can be cycled through by pressing the “Filter” button (RD9) on the RC-707. The following Digital Algorithm Filters may be selected: Organic algorithm by • Organic: AMR is the benchmark for HD record- • MP Listen: ings • Apodising 808: • Traditional: under 44.1kHz/48kHz/88.
Explanation and Sonic Characteristics of the Digital Algorithms Organic algorithm for HD recordings, is exclusive to AMR 21
Organic algorithm reigns supreme; it deals with ALL sources of “ringing” HD1. Organic – this algorithm is unique to AMR because it was developed as part of the HD Gemini Digital Engine. With a combination of the latest digital technologies: (i) Minimum Phase; (ii) Apodising and (iii) Soft Roll-Off in one “Organic” algorithm, the DP-777 is uniquely able to deal with “pre” and “post” ringing in BOTH the recording and the playback DAC.
4.4 Classic 16-Bit DAC Algorithms The DP-777 under the Classic 16-Bit DAC offers 2 user-selectable methods of filtering that can be cycled through during playback by pressing the “Filter” button (RD9) on the RC-707. The Filtering options are: CD1. Bit-Perfect I – this mode directly takes the data extracted from the inputs and re-clocked to generate the music signal.
4.5 Default Filter Selection The HD and Classic DACs each have their own set of filters. In addition to pressing the Filter button (RD9) to make a Filter selection, it is also possible for the user to set a new default filter. This is done by holding down the Filter button for 2-3 seconds. The display will flash “Set as Default” to acknowledge the new default filter. 4.
Section 5 - Computer Audio Resource 5.1 The Computer, Software and Digital Processor It is relatively quick and easy to connect a Mac/Windows personal computer to the DP-777 and commence playback. However, in order to achieve the very highest sound quality and to extract the maximum performance out of the DP-777, optimisation of the source is strongly recommended. The pace and change of computer audio software and operating systems is unabated.
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Section 6 - Analogue Volume Control (AVC) 6.1 Using the Mode Switch ALWAYS power OFF The DP-777 Digital Processor comes with a built-in Direct-Coupled, Buffered Analogue Volume Control system (R10) the DP-777 (AVC). before making a This means that the DP-777 via the rear panel Mode switch (R6) may be used as: Mode selection i. Volume+: DP-777 is both a digital and analogue pre-amplifier (Analogue Inputs 6 & 7 are enabled). or ii.
Appendix A - Troubleshooting Symptom Possible cause Solution No power when the power button is set to ON • poor or no power plug connection at power point • blown fuse at mains plug • insert the power plug firmly into the AC No sound • incorrect audio cable connections • incorrect operation of Amplifier • ensure the DP-777 is correctly connected • ensure input selector on the amplifier is set to DP-777 Remote control does not work • batteries in remote control handset have expired • object obscur
