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

Martin Audio – MA1.6s Amplifier
ENGLISH
11
6.7 Power consumption
There are three ways to determine the power/current consumption of the amplifier:
First, the peak current draw at full output power. Under this condition the power amplifier will operate for less than
2 minutes before thermally limiting or blowing the mains fuse, and is an unrealistic ënormalí use condition. To
design a mains distribution system based on the current draw at full power would result in an over specified
system. No programme material requires the full steady state continuous power of an amplifier, this operating
condition is only used for amplifier bench testing.
Second, the maximum expected average current under worst-case program material, which is 1/3 of full power
according to the FTC-standard. At this level the music will be in a state of constant clip and is therefore the highest
power level that can be obtained without completely obliterating the program material.
Last, the "normal operating power", as defined by EN 60065, IEC 65/ANSI/UL 6500 as a measurement level for
approval and testing to these standards. The normal operating power is measured using pink noise, with an
average output power equal to 1/8 of full power. The one-eighth power is the maximum level music can be re-
played without continuous amplifier clipping; this corresponds to headroom of only 9dBs, which is very low for
normal program material.
6.7.1 Calculation
The current draw can be calculated by dividing the mains input power by the mains voltage.
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 5dB (1/3 of full power) is used, with a 4 ohms load on each output of the amplifier. The
power per channel is 840 / 3 = 280 watts, and the total output power = 2 x 280 = 560 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;
1330 - 560 = 770 watts total for the amplifier.
MA1.6s 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 443 373 380 320 1510 1270
4 Ohm 770 630 660 540 2630 2150
2 Ohm 1400 1100 1200 950 4780 3750
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
Power 1/3 Power 1/8 Power Idle
[W] note 1 note 2
8 ohms 2x 430 730 480 115
4 ohms 2x 840 1330 840 115
2 ohms 2x 1200 2200 1400 115
Average power with music as program source. The amplifier driven to clip level.
Normal music power with 9dB headroom, IEC standard power rating.
MAX OUTPUT POWER
All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
12
7CONNECTIONS
7.1Input connections
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;/5,QSXWFRQQ H F W R U V  D U H  D F W L Y H  E D O D Q F H G  DQGZLUHGDFFRUGLQJWRWKH,(&WKDWLVSLQKRWDQGZLUHGLQWKH
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3,1 *5281'6+,(/'
3,1 +27
3,1 &2/'
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7,3 +27
5,1* &2/'
6/((9( 6+,(/'*5281'

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CH. B CH. AINPUT INPUTCH.A LINKCH.B LINK
GAIN41dB38dB35dB32dB29dB26dB23dB20dB 678123GAINCH.B GA INCH.ALINK / BRIDGE A+B ONOFFCurrent consumption: 9.7A230-240V 50-60Hz MLS-3 dB-3dBMust be groundedXLRPin 1 Scrn Sleeve2 Pos Tip3 Neg Ring1/ 4“ STEREO 0 dB
7KHLQSXWLPSHGDQFHLVKLJKHQRXJKNRKPV
EDODQFHGWRDOORZ´GDLV FKDLQLQJ´RUPXOWLSOHSDUDOOHO
LQSXWFRQQHFWLRQV7KHKHDGURRPRIWKHLQSXWFLUFXLWV
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DQ ORZ O H Y H O  V L J Q D O  V R X U F H   % D ODQFHGVLJQDOVDUHOHVV
VHQVLWLYHWR$&KXPDQGUDGLRLQWHUIHUHQFH7KH
VRX UFHLPSHGDQFHVKRXOGEHOHVVWKDQNRKPVWR
DYRLGKLJKIUHTXHQF ORVVHVLIORQJFDEOHUXQVDUH
XVHG
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LVFRQQHFWHGLQSDU D O O H O  Z L W K  W K H  1 H X W U L N  & R P E R  M D F N  R Q
HDFKLQSXW
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7RFRQQHFWDQXQEDODQFHGVRXUFHWLHSLQULQJRQ
756MDFNGRZQWRWKHVKLHOGRIWKHFRQQHFWRU,I RX
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LVHTXLYDOHQWWRWKDWIRUDEDODQFHGOLQH7RPLQLPL]H
KXPLQWKHDXG L R   X V H EDODQFHGLQSXWVZKHQHYHU
SRVVLEOH
All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
13
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7.2Connecting speakers
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3D\DWWHQWLRQWRVSHDNHUSRODULW\ORXGVSHDNHUVFRQQHFWHGRXWRISRODULW\GHJUDGHVRXQGTXDOLW\
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All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
14
,WLQFUHDVHVWKHORDGLPSHGDQFHDQGLQWURGXFHVUHVLVWLYHSRZHUORVVHV
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8OPERATION
8.1Operating precautions
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8.2Powering up – Soft start

:KHQ RXSRZHUXSWKH  D P S O L I L H U  L W  W D N H V  D  F R X S O H  R I  V H F R Q G V  W R  F K H F N  L W V  F L U F X L W V   7 K L V  L V  N Q R Z Q  D V  WKH  V R IWVWDUWRU
VORZVWDUW VHTXHQFH 7KH IDQV WKHQ EORZDWKLJKVSHHGEHIRUH JRLQJLQWRLGOHDQG WKH WZR ERWWRP JUHH Q  / ( ' ¶ V
LOOXPLQDWHWRVKRZ  W K H  D P S O L I L H U  L V  R S H U D W L R Q D O 
8.3Input attenuators

7KHWZR LQSXWOHYHO DWWHQXDWRUV RQWKH IURQW SDQHO DGMXVW WKH VLJQDOOHYHO IRU WKHLU UHVSHFWLYHDPSOLILHU FKDQQHO LQ DOO
PRGHV7KH DUHFDOLEUDWHGLQG%WRKHOSWKHVHWWLQJXSRIDFWLYHORXGVSHDNHUV VWHPV
,QEULGJHGPRGHERWKFRQWUROVPXVWEHLQWKHVDPHSRVLWLRQVRWKDWWKHVSH D N H U  O R D G  Z L O O  E H  V K D U HGHTXD O O  E H WZHHQ
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8.4Indicators
-40dB
PROTECT
CLIPONPROTECTCLIP-40dBONMA1.6s
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%,IWKHFOLSOLPLWHULVHQJDJHGLWKDVDVKRUWWLPHFRQVWDQWDQGLWLOOXPLQDWHVEU L H I O 
%,IWKHFOLSOLPLWHULVQRWHQJDJHGLWKDVDQLQFUHDVHGWLPHFRQVWDQWDQGLOOXPLQDWHVIRUDORQJHUSHULRG 
7KHUHPDLQLQJ HOORZ/('VLQGLFDWHLIDQ SURWHFWLRQFLUFXLWVDUHDFWLYDWHG7KHVHDUHGHVFULEHGRQSDJH
All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
15
9PROTECTION FEATURES
(DFK0DUWLQ$XGLRDPSOLILHUKDVPDQ DGYDQ F H G  S U R W H F W L R Q  I H D W X U H V   S U R W H F W L Q J  E R W K  W K H  D P S O L I L H U  D Q G WKH
ORXGVSHDNHUVFRQQHFWHGWRLWVKRXOGDIDXOWFRQGLWLRQDULVH8QGHUQRUPDOXVHWKHVHIHDWXUHVDUHLQDXGLEOH$OO
SURWHFWLRQFLUFXLWVRSHUDWHLQGH S H Q G H Q W O 
9.1Output Limiter
$QRXWSXWOLPLWHULVLQFOXGHGWRDYRLGDPSOLILHUFOLSS L Q J   : K H Q  D Q  D P S O L I L H U  L V  V H Y H U H O  R Y H U G U L Y H Q   L WVRXWSXWZDYHIRUP
LVFOLSSHGLWVSHDNVDUHVTXDUHGRII±UHGXFLQJWKHFUHVWIDFWRU,QH[WUHPHFDVHVWKHZDYHIRUPFDQDS S U R D F K  W K D W  R I
DVTXDUHZDYH$QDPSOLILHULVQRUPDOO FDSDEOHRISURGXFLQJIDUPRUHSRZHUXQGHUWKHVHFRQGLWLRQVWKDQLWVQRUPDO
XQGLVWRUWHGUDWHGRXWSXWSRZHU
7KHOLPLWHUZRUNVE PRQLWRULQJWKH  R X W S X W  D Q G  F R P S D U L Q J  W K H  G L V W R U W L R Q  S U R G X F H G  E H W Z H H Q  W K H  L Q S X W  D Q G  R X W S X W  R I  W K H 
DPSOLILHU,IWKHGLVWRUWLRQH[FHHGV7+'IRUDQ UHDVRQYROWDJHRUFXUUHQWFOLSSLQJWKHOLPLWHUUHG X F H V  W K H  L Q S X W
VLJQDOSURSRUWLRQDOO 1RWHWKDWLIWKHVLJQDOLVGLVWRUWHGRUFOLSSHGEHIRUHLWUHDFKHVWKHDPSOLILHUWKHFOLSOLPLWHUZLOOQRW
EHDFWLYDWHG
8QGHUQRUPDORSHUDWLRQWKHFOLSOLPLWHULVLQDXGLEOH7KHOLPLWHUFDQEHWXUQHG³21´RU³2))´E SUHVVLQJWKH U H O H Y D Q W
FOLSOLPLWVZLWFK6HHSDJH
6RPHPDQXIDFWXUHUVRIORXGVSHDNHUSURFHVVRUVGRQRWUHFRPPHQGWKHXVHRIFOLSOLPLWHUVLQDPSOLILHUVDV  L W  FDQ
DIIHFWWKHWUDFNLQJRIWKHSURFHVVRUVOLPLWHUV
,IWKHDPSOLILHU  L V  E H L Q J  X V H G  Z L W K R X W  D Q   H [ W H U Q D O  O L P L W L Q J   0 D U W L Q  $ X G L R  U H F R P P H Q G  O H D Y L Q J  W K H  FOLSOLPLWHUVVZLWFKHG
21EX W WRQGHSUHVVHG
9.2Thermal protection
:KHQWKHDPSOLILHULVGULYHQYHU KDUGLQWRDORZLPSHGDQFHORDGWKHFRROLQJIDQVZLOOUXQDWKLJKVSHHG,IWKHVH
RSHUDWLQJFRQGLWLRQVFRQWLQXHWKH3URWHFWLQGLFDWRUVZLOOLOOXPLQDWHLQGLFDWLQJWKDWWKHDPSOLILHULVDERXW  W R  J R  L Q W R 
WKHUPDOVKX W G R Z Q 
$IWHUILYHVHFRQGVWKHDPSOLILHUZLOOJRLQWRWKH U P D O  S U R W H F W  E   P X W L Q J  W K H  L Q S X W  V L J Q D O   $ I W H U      VHFRQGVWKH
DPSOLILHUZLOOKDYHFRROHGGRZQ H Q R X J K  I R U  W K H  D P S O L I L H U  W R  F R P H  R X W  R I  V K X W G R Z Q  D Q G  R S H U D W H  D V  Q RUPDO,IWKHORDG
FRQGLWLRQVUHPDLQXQFKDQJHGWKHWKHUPDOSURWHFWLRQZLOOEHUHLQLWLDWHG7KHUPDOSURWHFWLRQRFFXUVZKHQ  W K H  K H DWVLQN
WHPSHUDWXUHUHDFKHV
&
9.3VHF protection
,IDVLJQDORIPRUHWKDQN+]DWIXOOSRZHULVGHWHFWHGIRUPRUHWKDQILYHVHFRQGVWKH9+)SURWHFWLRQPXWHVWKH
LQSXWVLJQDO7KLVLVLQGLFDWHGRQWKHIURQWSDQHO4E WKH/('ODEHOHG3URWHFW$IWHUILYHVHFRQGVWKHRXWSXWVZLOO
XQPXWHDQGUHWXUQWRQRUPDORSHUDWLRQXQOHVVWKHRXWSXWVLJQDOKDVUHPDLQHGXQFKDQJHGLQZKLFKFDVHWKH9+)
SURWHFWLRQZLOOUHLQLWLDWH
9.4Short circuit protection
$OO0DUWLQ$XGLR0$6HULHVDPSOLILHUVDUHFRPSOHWHO VKRUWFLUFXLWSURWHFWHG7KHSURWHFWLRQFLUFXLWSHUPLWVYHU KLJK
SHDNFXUUHQWVEXWVWLOOKROGVWKHRXWSXWGHYLFHVZLWKLQWKHVDIHRSHUDWLQJDUHD,IDVKRUWFLUFXLWLVPDLQWDLQHGWKH
FKDQQHODIIHFWHGZLOOHYHQWXDOO JRLQWRDWKHUPDOSURWHFWF FOHXQWLOWKHVKRUWFLUFXLWKDVEHHQUHPRYHG
9.5AC mains voltage protection
,IWKH$&PDLQVYROWDJHLVRXWVLGHWKHRSHUDWLRQDOZLQGRZRYHURUXQGHUYROWDJHWKHSRZHUVXSSO ZLOO
DXWRPDWLFDOO VKXWGRZQ:KHQWKHPDLQVYROWDJHLVDERYHWKHPLQLPXPVWDUWYROWDJHDQGEHORZLWVPD[LPXP
RSHUDWLQJYROWDJHWKHDPSOLILHUZLOOUHVWDUW
7KHWZRJUHHQµ21¶/('¶VLQGLFDWHZKHQWKHSRZHUVXSSO LVRSHUDWLQJFRUUHFWO 
,WWDNHVDFRXSOHRIVHFRQGVWRVHOIFKHFNWKLVLVNQRZQDVWKHVRIWVWDUWRUVORZVWDUWVHTXHQFHWKHJDLQZLOO
VORZO DQGJUDGXDOO EHLQFUHDVHGEDFNWRWKHSUHYLRXVO VHWOHYHODQGWKHIDQVZLOOEORZDWKLJKVSHHGEHIRUHJRLQJ
LQWRLGOH 
All material © 2007. Martin Audio Ltd. Subject to change without notice.

Martin Audio – MA1.6s Amplifier
ENGLISH
16
9.6DC. protection
7KHUHDU H  W Z R  W S H V  R I  ' &  S U R W H F W L R Q 
%)XVHVRQWKHVXSSO EUDQFKHVRIHDFKFKDQQHO
%'&FURZEDUSURWHFWLRQWKDWVKRUWVWKHRXWSXWLIPRUHWKDQYROWV'&DUHEHLQJGHWHFWHGRQWKHRXWSXWV
%RWKWKHVHFLUFXLWVFRPHLQWRHIIHFWRQFHD'&OHYHOKDVEHHQGHWHFWHGRQHLWKHUFKDQQHO
10MAINTENANCE
8QGHUQRUPDOXVHWKHDPSOLILHUVKRXOGSURYLGH HDUVRIWURXEOHIUHHVHUYLFH7KHRQO PDLQWHQDQFHUHTXLUHGE WKH
XVHULVWRFOHDQWKHIURQWJULOOSHULRGLFDOO 
,QVRPHH[WUHPHFDVHVLWPD EHQHFHVVDU IRUDXWKRUL]HGVHUYLFHSHUVRQQHOWRFOHDQWKHLQVLGHRIWKHDPSOLILHU
7KHVHFRQGLWLRQVXVXDOO RFFXUDIWHUSURORQJHGXVHHJLQHQYLURQPHQWVXVLQJFUDFNHGRLOVPRNHPDFKLQHV
,I RXDUHXVLQJ RXUDPSOLILHUIRUKHDY GXW XVHLHFRQFHUWWRXULQJRULQGXVWULDOPXVLFLWLVUHFRPPHQGHGWKDW RX
KDYH RXUDPSOLILHUVHUYLFHGHYHU  HDUVSXUHO DVDSUHYHQWDWLYHPHDVXUH
10.1Troubleshooting
7KHVHDUHW SLFDOWKLQJVWRFKHFNLI RXWKLQN RXUDPSOLILHULVIDXOW 
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11WARRANTY
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Martin Audio – MA1.6s Amplifier
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18
12SPECIFICATIONS MA1.6S
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Martin Audio – MA1.6s Amplifier
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MA1.6s Amplifier
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