CONTENTS
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GUIDES |
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4 INTRODUCTION | NGLISH |
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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.
4.1Unpacking
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. It is suggested that you retain the original packaging so that the unit can be repackaged at a future date if necessary.
Please note that Martin Audio and its distributors cannot accept responsibility for damage to any returned product through the use of non - approved packaging.
4.2Front Panel
3 | 4 | 2 |
PROTECT
CLIP
ON
MA1.3s | 1 | |
| 0 | |
| ||
PROTECT
CLIP
ON 
1 | 6 | 5 | 2 | 7 | 8 |
1. Carry/protection handle
Both handles can be used to carry the amplifier; they also act as protection for the front panel. In fixed installations or where rack front covers are too shallow, they may be removed by unscrewing the retaining bolts behind the front panel.
2. Input level attenuators
These controls are used to set the signal level entering the amplifier. They are calibrated in dB's to assist the setup of active loudspeaker systems. (See page 12).
3. Protect indicator LED
This indicator illuminates if the amplifier attempts to function above its maximum operating temperature (90°°C). The indicator first comes on as a warning to either turn down the input level or check the cooling arrangements, after which point the amplifier will mute the input signal. When the cooling fans have returned the output heat sinks back to the normal operating temperature the input signal is
This indicator also illuminates when signals above 12 kHz at full power are detected at the output terminals, or if the short circuit protection is activated. Should this occur the input signal is muted, and the process repeats until the VHF signal is no longer present. (See page 13).
4. Clip/limit indicator
This indicator signals when the amplifier output is clipping or limiting. It has two different indication states: If the clip limiter is engaged, it has a short time constant and it illuminates briefly. (See page 13).
If the clip limiter is not engaged, it has an increased time constant and it illuminates for a longer period.
5. Signal present indicator
This LED illuminates at
6. On indicator
The two bottom green LED’s indicate that the output circuits are receiving the correct rail voltage.
All material © 2007. Martin Audio Ltd. Subject to change without notice.
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Martin Audio – MA1.3s Amplifier