Input Connections - Martin Audio MA1.3 User Manual

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CONTENTS
MA1.3
note 1 Average power with music as program
source. The amplifier driven to clip level.
Table 1.
The current draw can be calculated by dividing the mains input power by
the mains voltage. We recommend that you design the power distribution
for at least the current at 1/8 power or 1/3 power for heavy duty demand
like discos etc.
The heat power can be calculated as the following example:
If we consider a headroom of at least 9dB and a 4 ohm load on an amplifier
producing 650 watts per channel. The 1/8 power per channel is then;
650 ÷ 8 = 81 watts, total output; 2 x 81 = 162 watts.
The power consumption according to the chart above is then 800 watts.
The heat power produced is the difference between the power
consumption and power output; 800 - 162 = 638 watts per amplifier.
5.6
Both inputs are balanced on 3 pin XLR type connectors and wired pin 2
hot, pin 3 cold, pin 1 ground/shield:
PIN 1
PIN 2
PIN 3
SIG. GND.
Figure 3. XLR input connector pin-out
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PRINT
MAX OUTPUT POWER
Power
8 ohms 2X
4 ohms 2X
2 ohms 2X

Input connections

- SIG. GROUND/SHIELD
- HOT (+)
- COLD (-)
2 1
+
3
–
Martin Audio – MA1.3 Power Amplifier
MAINS INPUT POWER
Full Power 1/3 Power
sine wave note 1
350 1300 700
650 2300 1300
900 3600 1900
note 2 Normal music power with 9dB headroom,
IEC standard power rating.
8
GUIDES
1/8 Power Idle
note 2
400 140
800 140
1100 140