Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
1
CONTENTS (ENGLISH) Page No
1 CONTENTS MA 4.2s USER GUIDE 1
2APPROVALS 2
3WARNINGS 2
3.1 EXPLANATION OF GRAPHICAL SYMBOLS 2
3.2 WARNING 2
3.3 CAUTION 2
3.4 IMPORTANT SAFETY INSTRUCTIONS 2
3.5 USER RESPONSIBILITY 3
3.5.1 LOUDSPEAKER DAMAGE 3
3.5.2 LOUDSPEAKER OUTPUT HAZARD 3
3.5.3 RADIO INTERFERENCE 3
4 INTRODUCTION 4
4.1 UNPACKING 4
4.2 FRONT PANEL 4
4.3 REAR PANEL 5
5 REAR PANEL FEATURES 6
5.1 GAIN SWITCH 6
5.1.1 GAIN 6
5.1.2 SENSITIVITY 6
5.1.3 OPTIONS 7
5.2 LINK SWITCH 7
5.3 OPERATING MODES 7
5.3.1 STEREO MODE 7
5.3.2 NOTES FOR AMPLIFIER TESTING 7
5.3.3 TANDEM MODE 7
5.3.4 BRIDGE MONO MODE 8
5.3.5 BRIDGE MONO MODE FEATURES 8
5.4 IMPEDANCE MATCHING (MLS SWITCH) 8
5.4.1 THE MLS TECHNOLOGY 9
5.4.2 THE PROBLEM 9
5.4.3 THE SOLUTION 9
6 INSTALLATION 10
6.1 MOUNTING 10
6.2 COOLING 10
6.3 OPERATING VOLTAGE 10
6.4 DENMARK 10
6.5 SWITZERLAND 10
6.6 GROUNDING 11
6.7 POWER CONSUMPTION 11
6.7.1 CALCULATION 11
7 CONNECTIONS 12
7.1 INPUT CONNECTIONS 12
7.1.1 BALANCED INPUTS 12
7.1.2 UNBALANCED INPUTS 13
7.2 CONNECTING SPEAKERS 13
8 OPERATION 14
8.1 OPERATION PRECAUTIONS 14
8.2 POWERING UP – SOFT START 14
8.3 INPUT ATTENUATORS 14
8.4 INDICATORS 15
9 PROTECTION FEATURES 15
9.1 OUTPUT LIMITER 15
9.2 THERMAL PROTECTION 15
9.3 VHF PROTECTION 15
9.4 SHORT CIRCUIT PROTECTION 16
9.5 AUTOMATIC FUSE SAVER, AFS - LIMITER 16
9.6 AC MAINS VOLTAGE PROTECTION 16
9.7 THE "AC" LED 16
9.8 D.C. PROTECTION 16
10 MAINTENANCE 17
10.1 TROUBLESHOOTING 17
11 WARRANTY 18
12 SPECIFICATIONS MA4.2s 19
To Next Page
Need help?
Power Output
Weight and Dimensions
