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AMR AM-77 Owner's Manual

Reference class dual-mono pre-main amplifier
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AM-77 Reference Class
Dual-Mono Pre-Main Amplifier
Owner's Manual
Ver 3.6.3

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Summary of Contents for AMR AM-77

  • Page 1 AM-77 Reference Class Dual-Mono Pre-Main Amplifier Owner’s Manual Ver 3.6.3...
  • Page 2 FCC Declaration of Conformity - United States only the receiver is connected. This device complies with Part 15 of the FCC rules. Operation is sub- - Consult the dealer or an experienced radio/TV technician for help. ject to the following two conditions: (1) This device may not cause Canadian Notice (Avis Canadien) harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

  • Page 3: Warnings

    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 per- This component weighs over 35 kilograms. Do not place this compo-...
  • Page 4 AMR estimates that the AM-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 AM-77 to settle only after it has been used for this approximate length of time.

  • Page 5: Table Of Contents

    Contents WARNINGS Section 1 - Setup 1.1 Unpacking 1.2 Setup Section 2 - Component Overview 2.1 AM-77 Front Panel 2.2 AM-77 Rear Panel 2.3 RC-77 Remote Control Section 3 - Operation 3.1 Power On/Off 3.2 Volume Adjustment 3.3 Rear Inputs 3.4 Speakon Outputs...
  • Page 6 4.5 OptiProtect® Speaker Overload Protection 4.6 OptiMains® Protection for Excessive Under/Over-Voltages Section 5 - System Configurations 5.1 OptiOperation® Different System Configurations 5.2 Connection of more than one AM-77 Mode I: Pre-Main Stereo Mode II: Pre-Main Monoblock Mode III: Pre-Main Bi-Amplifier...
  • Page 7 Mode V: Power Monoblock Mode VI: Power Bi-Amplifer 5.3 Switching and Connection Diagrams for Different Modes Mode I: Pre-Main Stereo Mode II: Pre-Main Monoblock Mode III: Pre-Main Bi-Amplifier Mode IV: Power Stereo amplifier Mode V: Power Monoblock Amplifier Mode VI: Power Bi-Amplifer Section 6 - Additional Connectivity 6.1 Input for iPod/other portable music players 6.2 HiFi/Pro Switches for Balanced XLR inputs...
  • Page 8 This page has been intentionally left blank...

  • Page 9: Unpacking

    Synchronisation (3.5mm jack) cable (for linking-up multiple AM-77s). AM-77 Owner’s Manual. vi. AMR Warranty Card. vii. AMR Test Disk. viii. Aluminium professional flightcase. Please ensure that all items are present. Should an item be missing, please contact your AMR distributor/dealer.

  • Page 10: Setup

    Pre-Main Stereo Amplifier Connection The following diagrams illustrate the standard connection of the AM-77 in pre-main stereo amplifier mode. This is the default factory setting and is suitable for the majority of audio systems. Figure 1.1 depicts the use of standard...
  • Page 11 Connect the respective spade/banana/Speakon connectors of the speaker cables to the AM-77. Connect the source/s via the respective left and right XLR or RCA connectors to Inputs 1-5. iii. Connect the IEC of the mains power cable to the AM-77 and the socket to a mains source.
  • Page 12 This page has been intentionally left blank...

  • Page 13: Section 2 - Component Overview

    F1. STANDBY: to place the AM-77 in active or standby mode. F2. SOURCE: to select between the 5 different inputs. F3. VOLUME: to adjust the volume level. F4. iPod 3.5mm input connector: for the connection of an iPod or similar portable music device.

  • Page 14: Rear Panel

    2.2 AM-77 Rear Panel Warning: ensure no speaker connector is in contact with the chassis R1. SPADE/BANANA outputs: for connection of standard termination speaker cables. R2. SPEAKON outputs: for connection of Speakon terminated speaker cables. * Please refer to Sec- R3.
  • Page 15 In the majority of audio systems, the AM-77 is most likely to be operated as a Pre-Main Amplifier: please inspect the rear panel of the AM-77 to verify that the default settings (in bold) to enable the AM-77 to operate in this mode are as follows: - HIFI/PRO switch (R3) is set to ‘HiFi’...

  • Page 16: Remote Control

    RC3. SOURCE: to select between the 5 different inputs. RC4. VOLUME: to adjust the volume level. RC5. MUTE: to Mute (temporarily turn off sound) the AM-77. RC6. BRIGHTNESS: to adjust brightness levels. RC7. OK: to be used in Advanced Features mode*.

  • Page 17: Section 3 - Operation

    Section 3 - Operation 3.1 Power On/Off Press and release the ‘POWER’ rocker switch (R12) at the rear of the AM-77 to switch on the mains power. Once powered OFF: always wait 30 To switch the mains power OFF, press again and release. Always WAIT at least 30 seconds before switching seconds before ON again.

  • Page 18: Speakon Outputs

    3.8 HiFi/Pro Switch At the rear of the AM-77, the ‘HiFi/Pro’ switch (R3) allows for a source with a transformer balanced output to be connected to the AM-77. Please refer to Section 6 - Additional Connectivity for a detailed explanation.

  • Page 19: Rs232 Option Connector

    3.9 RS232 Option Connector At the rear of the AM-77, the RS232 connector (R9) allows the AM-77 to be upgraded. Please refer to Section 6 - Additional Connectivity for a detailed explanation. 3.10 Menu (RC-77 only) The MENU button (RC1) will enter the Advanced Menu system of the AM-77. Please refer to Section 4 - Advanced Features for a detailed explanation.
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  • Page 21: Section 4 - Advanced Features

    4.1 Labelling of Inputs and Setting Level Offset With the AM-77, in one process, it is possible to label each of the 5 inputs for a corresponding source and to set the respective level offset. This function is recommended only after ALL desired sources have been connected to the AM-77.
  • Page 22 List of available inputs: 15. PC Audio 1. Input X (default) All types of sources 16. Phono Stage 2. Aux I accomodated 17. Plasma TV 3. Aux II 18. Pre-Amplifier 4. Aux III 19. SACD Player 5. CD Processor 20. Tape Deck 6.

  • Page 23: Labelling Input

    4.2 Labelling Input X • Press the Menu key on the RC-77 • Use the Volume+/Volume- to scroll through the labels (see previous page for the full list of available labels) • Press the OK key on the remote to store the new name You will then move automatically onto ‘Setting Level Offset’...

  • Page 24: Setting Fixed Input Level

    4.4 Setting Fixed Input Level When using the AM-77 as part of a home theatre system with an external processor controlling the overall system volume, it is possible to program one of the five input sources to have a fixed level of input such as for a home theatre system of either 0.775V (0dbu) or 1.55V (+6dBu).

  • Page 25: Optiprotect® Speaker Overload Protection

    Normally switching the AM-77 off, waiting 30 seconds and switching it back on will reset the protection circuit if the cause was for example, excessive signal levels. In the extremely rare event that an internal malfunction of the AM- 77 is the cause for the protection circuit to engage, the protection will re-engage on switch-on, indicating the need for the AM-77 to be serviced.

  • Page 26: Optimains® Protection For Excessive Under/Over-Voltages

    If the display reads: Power OFF your AMR component and wait at least 5 minutes. If and when the mains electricity has been deemed to have returned to normal (such as during a brown out and the lights have dimmed but have returned to normal...

  • Page 27: Section 5 - System Configurations

    Section 5 - System Configurations 5.1 OptiOperation® Different System Configurations In keeping with AMR’s philosophy that ‘no one sound fits all’ the AM-77 is adaptable to suit virtually any system It is assumed all configuration; able to operate at one end as a Pre-Main stereo amplifier and at the other, as a single-channel power prior sections have amplifier.

  • Page 28: Connection Of More Than One

    In short, the AM-77’s flexibility is limited only to that of the imagination. For example, one may employ: - 3xAM-77s synchronised along with a high-quality digital crossover to drive a fully-active 3-way speaker system to the highest possible level of sound reproduction or;...

  • Page 29: Mode I: Pre-Main Stereo

    The following pages provide an outline of the theoretical wiring system behind each of the six different configura- tions with a brief accompanying summary. Mode I. Pre-Main Stereo Power Left • Standard system with AM-77 as the only Speaker amplifier. Power 1st AM-77 Right...

  • Page 30: Mode Ii: Pre-Main Monoblock

    • Need 2 or more AM-77s. Power • Drive low impedance speakers that only have one set of terminal connections. 1st AM-77 Left • ~600W/2Ohm RMS and ~300W/1Ohm RMS Speaker without current clipping. This is best suited to driving very low impedance speakers.

  • Page 31: Mode Iii: Pre-Main Bi-Amplifier

    Power • Drive speakers that have more than one set of terminal connections with improved per- formance and dynamic range. 1st AM-77 Left Speaker • Virtually all the power supply power is avail- able to the low frequency channel with imp- proved channel separation.

  • Page 32: Mode Iv: Power Stereo

    Mode IV. Power Stereo • Same as Mode I, except the Pre-Amplifier sec tion has been bypassed. Power Left Speaker • A separate pre-amplifier is needed to control the volume. Power 1st AM-77 Right Speaker...

  • Page 33: Mode V: Power Monoblock

    Mode V. Power Monoblock Power • Same as Mode II, except the Pre-Amplifier section has been bypassed. Power • A separate pre-amplifier is needed to control the volume. 1st AM-77 Left Speaker Power Power 2nd AM-77 Right Speaker...

  • Page 34: Mode Vi: Power Bi-Amplifer

    Mode VI. Power Bi-Amplifier Power • Same as Mode III, except the Pre-Amplifier section has been bypassed. Power • A separate pre-amplifier is needed to control the volume. 1st AM-77 Left Speaker Power Power 2nd AM-77 Right Speaker...

  • Page 35: Switching And Connection Diagrams For Different Modes

    5.3 Switching and Connection Diagrams for Different Modes The following is a description of the switch settings and connections required to engage the various modes. Mode I: Pre-Main Stereo amplifier (default) The default factory setting This is the factory default setting: the connection for which has been described in detail in Section 1 - Setup. We have illustrated the default switch positions here for ease of reference to re-configure from an alternative system setup back to the Pre-Main Stereo amplifier mode.

  • Page 36: Mode Ii: Pre-Main Monoblock

    Mode II: Pre-Main Monoblock amplifiers...
  • Page 37 Note: This function requires at least 2 x AM-77 synchronised Pre-Main amplifiers. i. Power OFF via the ‘POWER’ (R12) mains switch at the rear of both AM-77s. ii. Connect the cable from the ‘Sync Out’ connector (R8) of the ‘master’ amplifier to the ‘Sync In’...

  • Page 38: Mode Iii: Pre-Main Bi-Amplifier

    Mode III: Pre-Main Bi-amplifier (horizontal bi-amping)
  • Page 39 Note: This function requires at least 2 x AM-77 synchronised Pre-Main amplifiers. i. Power OFF via the ‘POWER’ (R12) mains switch at the rear of both AM-77s. ii. Connect the cable from the ‘Sync Out’ connector (R8) of the ‘master’ amplifier to the ‘Sync In’...

  • Page 40: Mode Iv: Power Stereo Amplifier

    Mode IV: Power Stereo amplifier...
  • Page 41 Power OFF via the ‘POWER’ (R12) switch at the rear of the AM-77. ii. Connect the desired separate pre-amplifier to the AM-77 via the Balanced or RCA female connector of Input 1 (R6). iii. Using a small flat blade screwdriver, move the ‘MODE’ switch (R5) to the centre to select ‘L R’.

  • Page 42: Mode V: Power Monoblock Amplifier

    Mode V: Power Monoblock amplifier...
  • Page 43 Note: This function requires at least 2 x AM-77 synchronised Pre-Main amplifiers. i. Power OFF via the ‘POWER’ (R12) switch at the rear of both AM-77s. ii. Using a small flat blade screwdriver, move the ‘MODE’ switch (R5) to the left to select ‘M’.

  • Page 44: Mode Vi: Power Bi-Amplifer

    Mode VI: Power Bi-amplifier...
  • Page 45 Note: This function requires at least 2 x AM-77 synchronised Pre-Main amplifiers. i. Power OFF via the ‘POWER’ (R12) switch at the rear of both AM-77s. ii. Using a small flat blade screwdriver, move the ‘MODE’ switch (R5) to the right to select ‘MM’.
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  • Page 47: Section 6 - Additional Connectivity

    Section 6 - Additional Connectivity 6.1 Input for iPod/other portable music players When the 3.5mm jack is used, ensure the RCA of Input 4 is disconnected On the front right-side panel, there is a 3.5mm jack (F4). This is for the connection of an iPod or any other portable music device for music playback through this medium.

  • Page 48: Hifi/Pro Switches For Balanced Xlr Inputs

    6.2 HiFi/Pro Switches for Balanced XLR inputs ‘Pro’ switch is for the few pre-amplifiers that have floating trans- former balanced outputs For the majority of sources, the HiFi/Pro switch (R3) is best left in the ‘HiFi’ position. However, if the source has a pro-audio style transformer balanced output, the HiFi/Pro switch needs to be set to ‘Pro’.

  • Page 49: Rs232 Options Connector

    6.3 RS232 Options Connector For future up- grades The RS232 ‘Options’ connector port (R9) is for upgrading the functionality of the AM-77 in future. Contact your local AMR distributor/dealer for more details.

  • Page 50: Appendix A - Troubleshooting

    • incorrect audio cable connections • connect the sources to the AM-77 correctly • incorrect amplifier operation • make sure that the input selector on the AM-77 is set to the desired source Strange ‘blast’ sound • check speaker connectors are not •...

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