MA1.3s HEAT POWER

CONTENTS

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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.

GUIDES

ENGLISH

MA1.3s HEAT POWER

 

1/3 POWER

1/8 POWER

1/3 POWER

1/8 POWER

1/3 POWER

1/8 POWER

 

WATTS

Kcal/hour

BTU/hour

8 Ohm

397

313

340

270

1350

1070

4 Ohm

687

538

590

460

2340

1840

2 Ohm

1242

910

1070

780

4240

3110

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

7.1Input connections

7.1.1Balanced inputs

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

 

GROUND/SHIELD

PIN 2

 

HOT (+)

PIN 3

 

COLD (-)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7 CONNECTIONS7.1.1Balanced inputsManual backgroundManual backgroundManual background ground

XLR input connector

XLR balanced

Within the Neutrik Combojack there is a _î(6.3mm) phone jack, which is wired in parallel with the XLR.

TIP

HOT

RING

COLD

SLEEVE

SHIELD/GROUND

All material © 2007. Martin Audio Ltd. Subject to change without notice.

1/4 TRS plug

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Martin Audio MA1.3s Amplifier

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Martin Audio Connections, MA1.3s HEAT POWER, 7.1.1Balanced inputs, Martin Audio - MA1.3s Amplifier, English, Contents