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
5.8
Impedance matching (MLS switch)
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 – MA1.6 Power Amplifier
MARTIN AUDIO
L O N D O N
GUIDES
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Related Manuals for Martin Audio MA1.6
Summary of Contents for Martin Audio MA1.6
- 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 – MA1.6 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 – MA1.6 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). 8. Gain select switch Allows amplifier gain to be switched between 32dB (1.45Vrms input sensitivity) and 37.5dB gain (0.775mV input sensitivity). (See page 14). 9. AC power cable (See page 6). Martin Audio – MA1.6 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 17). -
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 – MA1.6 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 – MA1.6 Power Amplifier... - Page 9 INPUT CH.B CH.A Mono Bridge 1/4" Pin 1 Sleeve Ring 230V AC 40-440Hz Must be grounded Figure 5. Rear panel connectors Martin Audio – MA1.6 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 – MA1.6 Power Amplifier...
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Page 11: Connecting Speakers
2 ohms position. The MLS ( Minimum load select ) switch offers an impedance matching, so you can drive the MA1.6 in 2 ohms without increased heat losses. Table 2 shows the possible combinations: MA1.6 MLS switch... -
Page 12: Operation Modes
– PHASE INVERT – CH B – – Figure 10. Bridge mono connection Both level attenuators must be at the same position. We recommend that you to put them in the 0dB (full) position. Martin Audio – MA1.6 Power Amplifier... -
Page 13: Stereo Reverse
A and B operating in opposite polarity, the energy storage in the power supply is more efficient. This means that the amplifier can deliver up to 10% more power than in tandem mono mode. This is significant for signals below 100Hz (sub bass etc.). Martin Audio – MA1.6 Power Amplifier... -
Page 14: Operation
On the other hand, for a disco mixer that operates at a nominal level of 0dBu, use the upper position setting, which has a sensitivity of 0dBu (0.775Vrms) for full power in 4 ohms. Martin Audio – MA1.6 Power Amplifier... -
Page 15: Protection Features
These are described on page 16. PROTECTION FEATURES Each MARTIN AUDIO MA Series amplifier has many advanced protection features that will protect both the amplifier and the speakers connected to it, should a fault condition arise. Under normal use these features are inaudible. - Page 16 If a short circuit is maintained, the channel affected will eventually go into a thermal protect cycle until the short circuit is removed. The MA1.6 is equipped with ALS™ (Adaptive Limiting System) protection circuitry, which continuously monitors the supply rails and limits the current going to the output transistors.
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Page 17: Design Features
DESIGN FEATURES Cooling MARTIN AUDIO MA Series amplifiers run very cool due to a patented heat exchanger. The bi-polar output devices are mounted directly onto a copper heat sink thereby avoiding thermal losses normally found when using mica washers. - Page 18 Traditional PSU's can behave erratically at low frequencies, particularly under clip conditions with the rise in their output impedance producing uncontrollable speaker cone movement. MARTIN AUDIO SMPS produces its rated power output at all frequencies regardless of speaker demands and AC line conditions.
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Page 19: 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 20: 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 21: 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 22: Warranty
GUIDES WARRANTY General The MA1.6 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 23: 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 – MA1.6 Power Amplifier... -
Page 24: Power Amplifier
< > CONTENTS PRINT GUIDES MA1.6 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 25 < > CONTENTS PRINT GUIDES MA1.6 Power Amplifier User’s Guide ENGLISH MARTIN AUDIO L O N D O N The Martin Experience...