Table of Contents
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CONTENTS
CONTENTS (ENGLISH)
1
UNPACKING
2
WARNINGS
3
USER RESPONSIBILITY
3.1
Speaker damage
3.2
Shock hazard
3.3
Radio interference
4
INTRODUCTION
4.1
Front panel
4.2
Rear panel
5
INSTALLATION
5.1
Mounting
5.2
Cooling
5.3
Operating voltage
5.4
Grounding
5.5
Power consumption
5.6
Input connections
5.7
Connecting speakers
6
OPERATION MODES
6.1
Stereo operation
6.2
Tandem mono
6.3
Bridged mono
6.4
Stereo reverse
7
OPERATION
7.1
Operation precautions
7.2
Powering up - Soft start
7.3
Input attenuators
7.4
Gain switch
7.5
Indicators
8
PROTECTION FEATURES
9
DESIGN FEATURES
10
SPECIFICATIONS
11
APPENDIX A
12
MAINTENANCE
13
WARRANTY
14
TECHNICAL SPECIFICATIONS
>
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The Martin Experience
Martin Audio – MA1.3 Power Amplifier
MARTIN AUDIO
L O N D O N
GUIDES
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Related Manuals for Martin Audio MA1.3
Summary of Contents for Martin Audio MA1.3
- Page 1 Operation precautions Powering up - Soft start Input attenuators Gain switch Indicators PROTECTION FEATURES DESIGN FEATURES SPECIFICATIONS APPENDIX A MAINTENANCE WARRANTY TECHNICAL SPECIFICATIONS MARTIN AUDIO L O N D O N The Martin Experience Martin Audio – MA1.3 Power Amplifier...
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Page 2: Unpacking
Electrical Safety EN60065:1993 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 3: User Responsibility
Check if the affected equipment complies with the EMC limits for immunity, (CE-labelled). If not, address the problem with the manufacturer or supplier. All electrical products sold in the EC must be approved for immunity against electromagnetic fields, high voltage flashes and radio interference. Martin Audio – MA1.3 Power Amplifier... -
Page 4: Introduction
PRINT GUIDES INTRODUCTION Thank you for purchasing a MARTIN AUDIO power amplifier. This manual contains important information on operating your amplifier correctly and safely. Please take some time to read this manual and familiarize yourself with the advanced features of this amplifier. -
Page 5: Rear Panel
Allows a single input to drive both channels simultaneously. (See page 12). 7. Gain select switch Allows amplifier gain to be switched between 32dB (1.27Vrms input sensitivity) and 37dB gain (0.775mV input sensitivity). (See page 14). 8. AC power cable (See page 6). Martin Audio – MA1.3 Power Amplifier... -
Page 6: Installation
Cooling Your amplifier uses forced air cooling to maintain a low and even operating temperature. All MARTIN AUDIO MA Series amplifiers have front to rear cooling. Never try to reverse the air flow, as the amplifier needs a pressure chamber between the fans and heat sink and this only operates in one direction of the air flow (see Design features on page 16). -
Page 7: Grounding
It also corresponds to headroom of 9dB, which is very low for normal program material. If operating the amplifier into a sustained 2 ohm load, protection circuits within the amplifier will limit the long-term current draw, and thermal protection may occur. Martin Audio – MA1.3 Power Amplifier... -
Page 8: Input Connections
Both inputs are balanced on 3 pin XLR type connectors and wired pin 2 hot, pin 3 cold, pin 1 ground/shield: PIN 1 SIG. GROUND/SHIELD PIN 2 HOT (+) PIN 3 COLD (-) – SIG. GND. Figure 3. XLR input connector pin-out Martin Audio – MA1.3 Power Amplifier... - Page 9 INPUT CH.A CH.B Mono Bridge 1/4" Pin 1 Sleeve Ring 230V AC 40-440Hz Must be grounded Figure 5. Rear panel connectors Martin Audio – MA1.3 Power Amplifier...
- Page 10 To minimize hum in the audio, use balanced inputs whenever possible. Unbalanced Output Amplifier Input Signal Grounded Shield Amplifier Input Unbalanced Output – – Figure 8. Balanced line with unbalanced equipment Martin Audio – MA1.3 Power Amplifier...
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Page 11: Operation Modes
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. Martin Audio – MA1.3 Power Amplifier... -
Page 12: Tandem Mono
LINK – PHASE INVERT – CH B – – Figure 10. Bridge mono connection Both level attenuators must be at the same position. We recommend that you put them in the 0dB (full) position. Martin Audio – MA1.3 Power Amplifier... -
Page 13: Operation
15 about clip limiters. • It is always a good idea to turn down the gain controls during power up as this prevents speaker damage, especially if there is a high level signal at the input. Martin Audio – MA1.3 Power Amplifier... -
Page 14: Powering Up - Soft Start
* When the clip limiter is not engaged it has an increased time constant and illuminates for a longer period. The remaining yellow "Protect" LED's indicate if the temperature or VHF protection circuits are activated. These are described on page 15. Martin Audio – MA1.3 Power Amplifier... -
Page 15: Protection Features
Apart from this one exception, MARTIN AUDIO recommend leaving the clip limiters switched "on" (button depressed). -
Page 16: Design Features
Light weight The MA1.3 switch mode amplifier has a very good power to weight ratio. This is achieved not only by the design of the power supply and heatsink but also by the use of an alloy chassis making rear rack supports unnecessary in most applications. - Page 17 However, early examples of SMPS used in power amplification were not ground breaking and literally adopted the type of supply found in many computers today. The MARTIN AUDIO SMPS is different in that it is regulated. Whilst the SMPS may sound complex it is actually very straightforward with high reliability.
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Page 18: Specifications
PRINT GUIDES SPECIFICATIONS Safety approvals MARTIN AUDIO MA Series amplifiers are designed to meet EN60065 electrical safety standards. EMC approvals EMC stands for Electro Magnetic Compatibility. This implies that the equipment should have low emission of radio frequencies, directly as electromagnetic fields in the air and as conducted from the cables from and to the unit. -
Page 19: Appendix A
PRINT GUIDES APPENDIX A Mains voltage selection All Martin Audio MA Series amplifiers are normally shipped for 230 Volt AC operation only. For use on 115 Volts AC, internal modifications to the power supply board must be made. Warning: This modification should only be carried out by an experienced service technician. -
Page 20: Maintenance
In the unlikely event, that there is a non-user rectifiable fault, return the amplifier to your supplier or an approved service centre. Martin Audio Ltd cannot be held responsible for damage or injury, as a result of the top cover being removed. -
Page 21: Warranty
GUIDES WARRANTY General The MA1.3 Powered Amplifier is warranted to be free from defects in components and factory workmanship under normal use and service, for a period of one year from the date of original purchase. During the warranty period, MARTIN AUDIO LTD or its nominated agents, will undertake to... -
Page 22: Technical Specifications
(W) 483mm x (H) 88mm x (D) 310mm (W) 19ins x (H) 3.5ins x (D) 12.2ins WEIGHT 8Kg (18lbs) SHIPPING DIMENSIONS (W) 560mm x (H) 190mm x (D) 500mm (W) 22.4ins x (H) 7.6ins x (D) 20ins SHIPPING WEIGHT 10Kg (22lbs) Martin Audio – MA1.3 Power Amplifier... -
Page 23: Power Amplifier
< > CONTENTS PRINT GUIDES MA1.3 Power Amplifier Please Click here to return to main menu Please Click here to visit our website MARTIN AUDIO L O N D O N The Martin Experience Century Point, Halifax Road, Cressex Business Park, High Wycombe, Buckinghamshire HP12 3SL, England. - Page 24 < > CONTENTS PRINT GUIDES MA1.3 Power Amplifier User’s Guide ENGLISH MARTIN AUDIO L O N D O N The Martin Experience...
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