Martin Audio MA1.6s User manual

Martin Audio – MA1.6s Amplifier
ENGLISH
1
CONTENTS (ENGLISH) Page No
1CONTENTS MA1.6S 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
4INTRODUCTION 4
4.1 UNPACKING 4
4.2 FRONT PANEL 4
4.3 REAR PANEL 5
5REAR PANEL FEATURES 5
5.1 GAIN SWITCH 5
5.1.1 GAIN 6
5.1.2 SENSITIVITY 6
5.1.3 OPTIONS 6
5.2 LINK SWITCH 6
5.3 OPERATING MODES 6
5.3.1 STEREO MODE 6
5.3.2 NOTES FOR AMPLIFIER TESTING 7
5.3.3 TANDEM MODE 7
5.3.4 BRIDGE MONO MODE 7
5.3.5 BRIDGE MONO MODE FEATURES 7
5.4 IMPEDANCE MATCHING (MLS SWITCH) 8
5.4.1 MLS TECHNOLOGY 9
5.4.2 THE PROBLEM 9
5.4.3 THE SOLUTION 9
6INSTALLATION 9
6.1 MOUNTING 9
6.2 COOLING 10
6.3 OPERATING VOLTAGE 10
6.4 DENMARK 10
6.5 SWITZERLAND 10
6.6 GROUNDING 10
6.7 POWER CONSUMPTION 11
6.7.1 CALCULATION 11
7CONNECTIONS 12
7.1 INPUT CONNECTIONS 12
7.1.1 BALANCED INPUTS 12
7.1.2 UNBALANCED INPUTS 12
7.2 CONNECTING SPEAKERS 13
8OPERATION 14
8.1 OPERATING PRECAUTIONS 14
8.2 POWERING UP – SOFT START 14
8.3 INPUT ATTENUATORS 14
8.4 INDICATORS 14
9PROTECTION FEATURES 15
9.1 OUTPUT LIMITER 15
9.2 THERMAL PROTECTION 15
9.3 VHF PROTECTION 15
9.4 SHORT CIRCUIT PROTECTION 15
9.5 AC MAINS VOLTAGE PROTECTION 15
9.6 DC. PROTECTION 16
10 MAINTENANCE 16
10.1 TROUBLESHOOTING 16
11 WARRANTY 17
12 SPECIFICATIONS MA1.6S 18
All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
2
2APPROVALS
This equipment conforms to the requirements of the EMC directive 89/336/EEC, amended by
92/31/EEC and 93/68/EEC and the requirements of the Low Voltage Directive 73/23/EEC, amended
by 93/68/EEC.
Standard Applied EMC Emission EN55103-1, E3
EMC Immunity EN55103-2, E3, with S/N below 1% at normal operation level.
Electrical Safety EN60065, Class I
3WARNINGS
3.1 Explanation of graphical symbols
The lightning symbol within a triangle is
intended to alert the user to the presence of
lethal voltages within the amplifier that are of
sufficient magnitude to constitute a risk of electric
shock to humans.
The exclamation mark within a triangle is
intended to alert the user to the presence of
important operating and service instructions in the
literature accompanying the product.
3.2 WARNING
To reduce risk of fire or electric shock, do not expose
this apparatus to rain or moisture.
3.3 CAUTION
To reduce the risk of fire or electric shock, do not
remove screws. There are no user-serviceable parts
inside this amplifier. Refer servicing to qualified
personnel only.
3.4 Important Safety Instructions
Before using your amplifier, please read the operating instructions and the safety suggestions.
1. Keep this manual for future reference.
2. Do not operate the amplifier if liquid ingress is suspected.
3. Do not stand water or any other liquid on, or near the amplifier.
4. Do not use this amplifier near water. Do not operate the amplifier if wet or standing in liquid.
5. Clean only with dry cloth.
6. Do not block the air intake or exhaust ports. Always install the unit in accordance with the instructions.
7. Do not operate the amplifier on or near any source of heat, such as radiators, lighting dimmer racks, or
other apparatus that produce heat.
8. Always operate the amplifier with the chassis ground wire connected to the electrical safety earth. Do not
tamper with the purpose of the electrical safety earth, it is provided for your safety. A grounding type plug
is fitted; this has two pins and a third grounding prong. If the plug provided does not fit your mains outlet,
consult an electrician or a competent person to replace the fitted plug. See page 8 section 6.3 for wiring
colour code
9. Connect only to AC power outlets rated 230 - 240V (or 100 - 120 V), 50-60Hz.
10. Do not use this amplifier if the mains cable is damaged or frayed, particularly check where the mains
cable exits the amplifier and the mains plug. Protect the mains cable from being walked upon or rolled
over by heavy objects.
11. Only use accessories specified by the manufacturer.
!
!
All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
3
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All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
4
4INTRODUCTION
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,IWKHFOLSOLPLWHULVHQJDJHGLWKDVDVKRUWWLPH F R Q VWDQWDQGLWLOOXPLQD W H V  E U L H I O    6 H H  S D J H  
,IWKHFOLSOLPLWHULVQRWHQJDJHGLWKDVDQLQFUHDVHGWLPHFRQVWDQWDQGLWLOOXPLQDWHVIRUDORQJHUSHULRG
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7KLV/(' L O O X P L Q D W H V  D W  ±   G % E H O R Z  I X O O  R X W S X W  V L J Q D O
2QLQGLFDWRU
7KHWZRERWWRPJUHHQ/('¶ V  L Q G L F D W H  W K D W  W K H  R X W S X W  F L U F X L W V  D U H  U H F H L Y L Q J  W K H  F R U U H F W  U D L O  Y R O W D J H 
All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
5
!
)DQJULOOILOWHUV
7ZRJULOOHVZLWKIRDP  I L O W H U V  D U H  O R F D W H G  R Q  W K H  I U R Q W  S D Q H O  W R  S U H Y H Q W  G X V W  I U R P  H Q W H U L Q J  W K H  D P S O LILHU7KHJULOOHVDUH
UHPRYDEOHIRU  H D V  F O H D Q L Q J  R I  W K H  I L O W H U V  E   V L P S O  S X O O L Q JWKHPRII7KHIRDPILOWHUVVKRXOGDOZD VEH X V H G 
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7XUQVPDL Q V  S R Z H U  R Q  R U  R I I 
6HHSDJHDQG
4.3Rear Panel
OUTPUT CH.B
CH. B CH. A
Ser.No:
OUTPUT CH.A
Clip Limiter A
On
Off
INPUT
Clip Limiter B
On
Off
INPUTCH.A LINK
CH.B LINK
STEREO
1+CH.A+
1- CH.A-
2+CH.B+
2- CH.B-
BRIDGE
Pin 1+ Spk+
2- Spk-
GAIN
41dB
38dB
35dB
32dB
29dB
26dB
23dB
20dB
678
123
GAI N
CH.B GAI N CH.A
LINK/ BRIDGE A+B
ON
OFF
1+ CH.B+
1- CH.B-
Current consumption: 9.7A
230-240V 50-60Hz
MLS
-3 dB
-3dB
Mus t be grounded
XLR
Pin 1 Scrn Sleeve
2 Pos Tip
3 Neg Ring
1/ 4“
Made in the EEC byMARTIN AUDIO MA1. 6s
STEREO
0 dB
13 4567854 1
93
2
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5REAR PANEL FEATURES
5.1Gain switch

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7KLVFDQEHXVHIXOZKHQXVLQJORZRUKLJKQRPLQDOLQSXWVLJQDOV0RVWSURIHVVLRQDOPL[LQJFRQVROHVRSHUDW H  D W  D 
QRPLQDOOHYHORIWRG%XWKHG%JDLQSR V L W L R Q  H Q V X U H V  W K H U H  L V  S O H Q W  R I  I D G H U  P R Y H P H Q W  D Y D L O D E O H   ) R U  V H P L
All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
6
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RSWLRQLVWRUHPRYH W K H  ' , 3  V Z L W F K   7KLVVKRX O G  R Q O \  E H  G R Q H  E \  D X W K R U L ] H G  V H U L F H  S H U V R Q Q H O   7KLVFRUUHV S RQGV
WRDOOVZLWFKHVVHWWR³2))´LHG%JDLQDQGVWHUHRPRGH
5.2Link switch
7KH/LQNVZLWFKORFDWHGRQWKHUHDUSDQHOWKHFHQWUDO',3VZLWFKLVIRUFKDQJLQJWKHRSHUDWLQJPRGHRIWKHDPSOLILHU
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5.3Operating modes
6WHUHRPRGH
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IRUDOOFKDQQHORSHUDWLRQVHJELDPSDQGVWHUHR6WHUHRPRGHLVVHOHFWHGE
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IURQWSDQHOFRQWUROWKHUHVSHFWLYHFKDQQHOVOHYHOV
1H HUFRQQHFWHLWKHURXWSXWWHUPLQDOWRJURXQGRULQSDUDOOHO7KHUHFRPPHQGHG
PLQLPXPQRPLQDOLPSHGDQFHIRUVWHUHRRUWDQGHPRSHUDWLRQLVRKPVSHUFKDQQHO
All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
7
1RWHVIRUDPSOLILHUWHVWLQJ
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IURPDQ0$V0/6DWG%LV:6RWKHWRWDOEULGJHGSRZHULQWRWKHRKPVORDGZLOOEH[:
:
All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
8
5.4Impedance matching (MLS switch)
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LPSHGDQFHVDVVKRZQLQ7DEOH$VFDQEHVHHQIURP7DEOHWKH0$VFDQSURGXFHRXWSXWSRZHUVLQ H [ F HVVRI
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7DEOH
MA1.6s
MLS SWITCH
SETTING
LOAD CONFIGURATION -3 dB 0 dB
16 ohms Stereo (2 channel) 110 W 215 W
8 ohms Stereo (2 channel) 240 W 430 W
4 ohms Stereo (2 channel) 430 W 840 W
2 ohms Stereo (2 channel) 870 W 1540 W *
16 ohms Mono Bridged 480 W 840 W
8 ohms Mono Bridged 870 W 1680 W
4 ohms Mono Bridged 1740 W 3000 W *
* Not recommended
(thermal protection may occur at high continuous power)
Power in watts (EIA 1 kHz, 1% THD)
All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
9
0/67HFKQRORJ\
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CH. A INPUT
MLS
-3 dB
-3dB
0 dB
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6INSTALLATION
6.1Mounting
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All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
10
6.2Cooling
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6.3Operating voltage
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6.6Grounding
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All material © 2007. Martin Audio Ltd. Subject to change without notice.