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Abbingdon Music Research CD-77 Owner's Manual

Reference class compact disk processor
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Abbingdon Music Research
CD-77 Reference Class
Compact Disk Processor
Owner's Manual

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Summary of Contents for Abbingdon Music Research CD-77

  • Page 1 Abbingdon Music Research CD-77 Reference Class Compact Disk Processor Owner’s Manual...
  • Page 2 ‘All the Music Recreated’...

  • Page 3: Warnings

    WARNINGS 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. This component weighs 39 kilograms. Do not place this component on an unstable cart, stand, tripod, bracket or table as the component may fall causing serious injury to a child or adult and serious damage to the unit.
  • Page 4 Care should be taken so that objects do not fall, and liquids are not spilled into the enclosure through any openings. This component should be serviced only by qualified AMR service personnel when: A. The power cable or the power input socket has been damaged; B.
  • Page 5 To disconnect the AC power cable, grasp the plug itself; never pull the cable. On placement Just like a thermionic electron valve amplifier, with a compliment of 6 valves, the CD-77 will become warm during operation. This is normal. Given this, it is imperative that the installation of the CD-77 DOES NOT interfere with its proper ventilation.
  • Page 6 AMR estimates that the CD-77 may take between 300-500 operating hours for all of the internal components to be fully-broken in. Please anticipate the sonic performance of the CD-77 to settle only after it has been used for this approximate length of time.

  • Page 7: Table Of Contents

    Contents WARNINGS Section 1 - Unpacking and Setup 1a. Unpacking 1b. Setup Section 2 - Component Overview 2a. Start-Up Section 3 - Advanced Features 3a. OptiSample® 3b. DAC Input 3c. IR Link 3d. Crowbar ‘Muting’ Circuit 3e. OptiMains® Protection for Excessive Under/Over-Voltages...
  • Page 8 Section 4 - Technical Features Appendix - Troubleshooting & Maintanence Maintenance Specifications...

  • Page 9: Section 1 - Unpacking And Setup

    Section 1 - Unpacking and Setup Figure 1.1 - Front Panel of the CD-77 Figure 1.2 - Rear Panel of the CD-77...

  • Page 10: 1A. Unpacking

    We hope you derive as much pleasure from using this component as we have enjoyed making it for you. 1a. Unpacking This section refers to the unpacking of the CD-77 and its subsequent setup. Upon unpacking, please find: CD-77 Reference Class Compact Disk Processor ii.

  • Page 11: 1B. Setup

    1b. Setup The following diagram graphically illustrates the standard connection of the CD-77 in a two-channel system. Figure 1.3 - CD-77 System Setup (CD-77 + AM-77 + LS-77) Speaker R Speaker L System connec- tion using XLR connectors Sensitivity: 87dB...
  • Page 12 Ensure the CD-77 is located on a level and solid surface capable of supporting at least 50 kgs. iv. Using the spirit level located inside the CD well, check the CD-77 is on a level platform (when the air bubble is at least inside the red circle).

  • Page 13: Section 2 - Component Overview

    Section 2 - Component Overview Figure 2.1 - CD-77 Front Fascia F1. STANDBY button: to place the CD-77 in active or standby mode. F2. PLAY/PAUSE button: to initiate playback/pause once a compact disk has been correctly loaded. F3. STOP button: to halt/stop play.
  • Page 14 R4. INFRA-RED Link*: for the connection of a wireline remote control. R5. POWER Switch: to switch on mains electricity to the CD-77. R11. IEC power rceptacle: for the connection of PC-77 mains power cable to the CD-77. Please refer to Section 3 - Advanced Features for a detailed explanation.
  • Page 15 Figure 2.3 - RC-77 Remote Control RC15 RC14 RC13 RC12 RC11 RC10 RC-77: battery installation To install the 2 x AAA batteries, using a Philips screwdriver, remove the four screws at the four corners of the rear battery compartment. Install the 2 x AAA batteries in the correct direction according to the baseplate inside the battery compartment. Replace the battery compartment and the four cover screws.
  • Page 16 RC3. A-B button: to select an excerpt from a track for repeat. RC4. DAC button: with a USB connection made, to bypass the transport and enter DAC mode. RC5. STANDBY button: to place the CD-77 in active or standby mode. RC6. REV/REVERSE button: to fast reverse or select the previous track.

  • Page 17: 2A. Start-Up

    2a. Start-Up 1. Power On/Off Press the ‘POWER’ rocker switch (R5) at the rear of the CD-77 to switch mains power ON to the CD-77. Once powered To switch the mains power OFF, press again and release. Always WAIT at least 20 seconds before switching OFF: always wait on again.
  • Page 18 Replace the CD puck in the center and close the lid. Make sure the CD puck is correctly centered and positively engaged. Close the CD door so that the CD-77 is able to scan the compact disc’s TOC (Table of Contents) and display the total number of tracks and playing time.
  • Page 19 PLAY/PAUSE button (RC9) on the RC-77 remote control. Always use the NOTE: The CD-77 has been designed to play all types of compact discs including the CD layer of hybrid CD puck SACD’s. However, as such discs are thicker, please ensure the CD puck is positively engaged with the spindle.
  • Page 20 6. Stop (Resume) At any time, pressing the STOP button (F3) once on either the front fascia or the RC-77 (RC7) will halt During playback, playback. By pressing PLAY/PAUSE (F2) or (RC9), playback will resume from the last point at which play was if STOP is pressed once and halted.
  • Page 21 If the REPEAT button (RC2) is pressed AGAIN: Repeat All will be displayed: once the last track of the compact disc has been played, instead of stopping, the CD-77 will revert to Track 1. 11. Remote Commander-77: A-B Figure 2.3: RC3...
  • Page 22 To cancel this program, press the A-B button (RC3) again. 12. Remote Commander-77: DAC This is for the replay of music on the CD-77 from music stored on a computer hard-drive via a USB-to-USB Figure 2.3: RC4 cable connection.
  • Page 23 Go to ‘Control Panel’ > ‘System’ > ‘Hardware’ > ‘Device Manager’. In ‘Device Manager’ wait until the personal computer in ‘Hardware’ has recognised the CD-77 as a ‘USB Audio Device’. This is found under the ‘Sound, video and game controllers’ category.
  • Page 24 19. Remote Commander-77: Brightness Figure 2.3: RC11 The BRIGHTNESS button (RC11) allows for the adjustment of the display on the front fascia of the CD-77. There are 4 different brightness settings including display off. With a separate power supply, the display has no...
  • Page 25 20. Remote Commander-77: Time Figure 2.3: RC12 Normally the display will show the time elapsed since the beginning of the current track but pressing the TIME button (RC12) on the RC-77, the display will show and cycle through: Current Remaining > Total Remaining > Total Time 21.
  • Page 26 22. Remote Commander-77: Program Figure 2.3: RC14 Press the PROGRAM button (RC14) and: Program No: 01 will be displayed. Thereafter select the track via the numeric keypad (RC1). Program No: 02 will then be displayed and the same routine is repeated. To commence playback, press PLAY/PAUSE (RC9). 23.

  • Page 27: Section 3 - Advanced Features

    3a. OptiSample® The CD-77 Compact Disk Processor offers 6 user-selectable methods of Sampling that can be ‘cycled through’ during playback by pressing the OptiSample® button (RC10) on the RC-77. The sampling options are: 1. Digital Master I – this mode directly takes the data extracted from the CD and re-clocked to generate the music signal.
  • Page 28 4. Oversampling 4x – this mode engages the Digital Filter with an oversampling factor of 4, performing quite a large degree of digital manipulation. The original data from the CD is in effect discarded and re-placed with a re-calculated version. This new version of the music is mainly linearly scaled up using a whole number as scaling factor and resolution/edge enhanced.

  • Page 29: 3B. Dac Input

    3b. DAC Input It is possible to allow playback of a large library of music to an exceptionally high standard through the CD-77’s An S/PDIF link DAC option (See Section 2 item 12 for connection details). Under the DAC mode, the DAC section of the...

  • Page 30: 3E. Optimains® Protection For Excessive Under/Over-Voltages

    3e. OptiMains® Protection for Excessive Under/Over-Voltages One of the core circuits of the CD-77 is the OptiMains® system which will condition and adjust the incoming mains supply for the best operation under all normal mains conditions (including situations that will cause audible problems without OptiMains®).

  • Page 31: Section 4 - Technical Features

    Section 4 - Technical Features 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.

  • Page 32: Appendix - Troubleshooting & Maintanence

    • • object obscuring remote sensor remove any objects directly in front of the CD-77 on the CD-77, no “line of sight” • A ‘humming’ sound loose cable connections can be heard •...

  • Page 33: Maintenance

    Maintenance i. About the Optical Pickup The CD-77 uses a solid-state semi-conductor diode laser, mounted on a tracking servo-mechanism to play the disc. The laser illuminates the track of microscopic pits representing the digital data bits, while photo-diodes detect the reflected illumination from the disc and convert it into an electronic signal which is then decoded to recover the musical waveform in each stereo channel.
  • Page 34 CD-R & CD-RW Audio Discs The CD-77 can play CD-R & CD-RW audio discs that have been recorded on a computer or CD-recorder. The quality of CD-R & CD-RW audio discs varies widely which may affect playability. iv. Handling Compact Disks Always handle Compact Discs with care.

  • Page 35: Specifications

    Specifications Figure S.1 - Specifications Table Operation modes: • Direct Master I; no digital or analogue filter • Direct Master II; no digital filter, anti-sin(x)/(x) analogue filter • Oversampling 2x • Oversampling 4x • Upsampling 96kHz • Upsampling 192kHz Compact Disk Drive: Toploading proprietary mechanism Digital Audio Inputs: 1 x USB interface...
  • Page 36 ...continued Output voltage (Digital Full Scale) : >2V Output Impedance: < 200 Ohm Frequency Response: 20Hz to 20 kHz +0.0, -0.5dB Signal-to-noise ratio ‘A’ Weighted: > 100 dB Total Harmonic Dist. + Noise (THD+N): < 0.3% Dynamic range: >90 dB Channel separation: >90 dB Power consumption:...
  • Page 37 Unless specified otherwise, the Specifications apply to the 4xOverSampling mode and a Digital full scale signal. Information and specifications subject to change without notice. Abbingdon Music Research is a subsidiary of the Abbingdon Global Group 22 Notting Hill Gate; London; W11 3JE; United Kingdom;...

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