Martin Audio MA900 User Manual
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CONTENTS
CONTENTS (ENGLISH)
1
2
3
3.1 EXPLANATION OF GRAPHICAL SYMBOLS
3.2 WARNING
3.3 CAUTION
3.4 IMPORTANT SAFETY INSTRUCTIONS
3.5 USER RESPONSIBILITY
4
4.1 UNPACKING
4.2 FRONT PANEL
4.3 REAR PANEL
5
5.1 GAIN SWITCH
5.2 LINK SWITCH
5.3 OPERATING MODES
6
6.1 MOUNTING
6.2 COOLING
6.3 OPERATING VOLTAGE
6.4 GROUNDING
6.5 POWER CONSUMPTION
7
7.1 INPUT CONNECTIONS
7.2 CONNECTING SPEAKERS
8
8.1 OPERATING PRECAUTIONS
8.2 POWERING UP – SOFT START
8.3 INPUT ATTENUATORS
8.4 INDICATORS
9
9.1 OUTPUT LIMITER
9.2 VHF PROTECTION
9.3 SHORT CIRCUIT PROTECTION
9.4 AC MAINS VOLTAGE PROTECTION
9.5 DC PROTECTION
10
10.1 TROUBLESHOOTING
11
12
All material © 2007. Martin Audio Ltd. Subject to change without notice.
PRINT
CONTENTS
MA900 USER GUIDE
APPROVALS
WARNINGS
3.5.1
LOUDSPEAKER DAMAGE
3.5.2
SPEAKER OUTPUT HAZARD
3.5.3
RADIO INTERFERENCE
INTRODUCTION
REAR PANEL FEATURES
5.1.1
THE DIP-SWITCH
5.1.2
SENSITIVITY
5.1.3
OPTIONS
5.3.1
STEREO MODE
5.3.2
NOTES FOR AMPLIFIER TESTING
5.3.3
TANDEM MODE
5.3.4
BRIDGE MONO MODE
5.3.5
BRIDGE MONO MODE FEATURES
INSTALLATION
6.5.1
CALCULATION
CONNECTIONS
7.1.1
BALANCED INPUTS
7.1.2
UNBALANCED INPUTS
OPERATION
PROTECTION FEATURES
MAINTENANCE
WARRANTY
SPECIFICATIONS MA900
Martin Audio – MA900 Amplifier
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Summary of Contents for Martin Audio MA900

  • Page 1 9.1 OUTPUT LIMITER 9.2 VHF PROTECTION 9.3 SHORT CIRCUIT PROTECTION 9.4 AC MAINS VOLTAGE PROTECTION 9.5 DC PROTECTION MAINTENANCE 10.1 TROUBLESHOOTING WARRANTY SPECIFICATIONS MA900 All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 2: Explanation Of Graphical Symbols

    12. The unit is intended to use in a 19î rack. Follow the mounting instructions. When racks with wheels are used, use caution to avoid injury from tipping when in motion. All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 3 • Consult your dealer or an experienced engineer/ technician for help. All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 4: Front Panel

    Unpacking Each Martin Audio MA series amplifier is built to the highest standard and thoroughly inspected before it leaves the factory. After unpacking the unit, examine it carefully for any signs of transit damage and inform your dealer if such damage is found.
  • Page 5: Rear Panel

    0 dB u o r -1 0 dB th e high e r ga in se tting s o f th e a mp lifie r ca n b e u se d. All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 6: The Dip-Switch

    Never connect either output terminal to ground or in parallel. The recommended minimum nominal impedance, for stereo or tandem operation, is 2 ohms per channel. All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 7: Notes For Amplifier Testing

    4 ohms part. The power into 4 ohms from an MA 900 is 700W. So, the total bridged power into the 8 ohms load will be 2 x 700 = 1400W All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 8: Mounting

    Your amplifier uses a forced air cooling system to maintain a low and even operating temperature. All fan cooled MARTIN AUDIO MA Series amplifiers have front to rear cooling. Never try to reverse the airflow, as the amplifier needs a pressure chamber between the fans and heat sink, and this only operates in one direction of the airflow.
  • Page 9: Grounding

    320 / 8 = 40 watts, and the total output power = 2 x 40 = 80 watts. The mains power consumption from the chart above is then 370 watts. All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 10: Connections

    It is con ne cte d in parallel with th e Ne utrik Co mb o jack o n e ach inpu t. All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 11: Unbalanced Inputs

    The loudspeaker cable reduces the power of the amplifiers in two ways: It increases the load impedance and introduces resistive power losses. All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 12: Operating Precautions

    . Under normal use these features are inaudible. All protection circuits operate independently. All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 13: Output Limiter

    S om e ma n ufacturers o f lo u dspe ake r pro ce ssors d o n ot reco mm en d the u se of clip limite rs in a m plifiers, a s the y ten d to up se t the trackin g of th e pro ce sso r's lim iters. If the amplifier is being used without any external limiting, Martin Audio recommend leaving the clip limiters switched "ON" (button depressed).
  • Page 14: Troubleshooting

    In the unlikely event of on a non-user rectifiable fault, return the amplifier to your supplier or an approved service centre. Martin Audio cannot be held responsible for damage or injury as a result of the top cover being removed. All material © 2007. Martin Audio Ltd. Subject to change without notice.
  • Page 15 During this warranty period MARTIN AUDIO LTD or it's nominated agents, will undertake to repair, or at it's discretion, replace this product at no charge to it's owner, when failing to perform as specified, providing the unit is returned undamaged, in it's original packaging, shipping prepaid, to the factory, distributor or authorised service facility.
  • Page 16: Specifications Ma

    15Kg (33Ibs) SHIPPING DIMENSIONS (W) 560mm x (H) 180mm x (D) 500mm (W) 22ins x (H) 7.1ins x (D) 19.7ins SHIPPING WEIGHT 16.6Kg (36.5lbs) All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 17 2 x Neutrik Speakons Clip Limiters Push Switch “ON”/ ”OFF” per Channel Speakon and Comb jack, are registered Trademarks of Neutrik AG Liechtenstein All material © 2007. Martin Audio Ltd. Subject to change without notice. Martin Audio – MA900 Amplifier...
  • Page 18 The Martin Experience Century Point, Halifax Road, Cressex Business Park, High Wycombe, Buckinghamshire HP12 3SL, England. Telephone: +44 (0)1494 535312 Facsimile: +44 (0)1494 438669 Web: www.martin-audio.com E-mail: info@martin-audio.com All material © 2007. Martin Audio Ltd. Subject to change without notice.
  • Page 19 < > CONTENTS PRINT GUIDES MA900 Amplifier User’s Guide ENGLISH The Martin Experience All material © 2007. Martin Audio Ltd. Subject to change without notice.

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