Connections; Input Connections; Balanced Inputs - Martin Audio MA1.3s User Manual

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CONTENTS
We recommend you to design the power distribution for at least the current at 1/8 power, and 1/3 power for heavy-
duty demands such as concert touring and industrial music etc.
The heat power can be calculated as follows:
If a headroom figure of at least 5dB (1/3 of full power) is used with a 4 ohms load on each output of the amplifier.
The 1/3 power per channel is then; 650 / 3 = 217watts, and the total output power = 2 x 217 = 433 watts.
The power consumption according to the chart above is then 1330watts.
The heat power produced is the difference between the power consumption and output power;
1120 - 433 = 687 watts total for the amplifier.
8 Ohm
4 Ohm
2 Ohm
1/3 Power level = Average power with music as programme source. The amplifier driven to clip level
1/8 Power level = Normal operating power with music as programme source, 9dB headroom
7

CONNECTIONS

7.1

Input connections

7.1.1
XLR Input connectors are active balanced and wired according to the IEC 268, that is pin 2 hot, and wired in the
following way:
PIN 1
PIN 2
PIN 3
XLR input connector
Within the Neutrik Combojack there is a _î(6.3mm) phone jack, which is wired in parallel with the XLR.
TIP
RING
SLEEVE
All material © 2007. Martin Audio Ltd. Subject to change without notice.
PRINT
1/3 POWER 1/8 POWER
WATTS
397 313
687 538
1242 910

Balanced inputs

GROUND/SHIELD
HOT (+)
COLD (-)
HOT
COLD
SHIELD/GROUND
Martin Audio – MA1.3s Amplifier
MA1.3s HEAT POWER
1/3 POWER 1/8 POWER
Kcal/hour
340 270
590 460
1070 780
XLR balanced
1 / TRS plug
4
10
1/3 POWER 1/8 POWER
BTU/hour
1350 1070
2340 1840
4240 3110
ground
GUIDES