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All material © 2007. Martin Audio Ltd. Subject to change without notice.
1
Martin Audio – MA1.6s Amplifier
Page No
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CONTENTS (ENGLISH)
1
CONTENTS MA1.6S USER GUIDE
2
APPROVALS
3
WARNINGS
3.1 EXPLANATION OF GRAPHICAL SYMBOLS
3.2 WARNING
3.3 CAUTION
3.4 IMPORTANT SAFETY INSTRUCTIONS
3.5 USER RESPONSIBILITY
3.5.1 LOUDSPEAKER DAMAGE
3.5.2 LOUDSPEAKER OUTPUT HAZARD
3.5.3 RADIO INTERFERENCE
4
INTRODUCTION
4.1 UNPACKING
4.2 FRONT PANEL
4.3 REAR PANEL
5
REAR PANEL FEATURES
5.1 GAIN SWITCH
5.1.1 GAIN
5.1.2 SENSITIVITY
5.1.3 OPTIONS
5.2 LINK SWITCH
5.3 OPERATING MODES
5.3.1 STEREO MODE
5.3.2 NOTES FOR AMPLIFIER TESTING
5.3.3 TANDEM MODE
5.3.4 BRIDGE MONO MODE
5.3.5 BRIDGE MONO MODE FEATURES
5.4 IMPEDANCE MATCHING (MLS SWITCH)
5.4.1 MLS TECHNOLOGY
5.4.2 THE PROBLEM
5.4.3 THE SOLUTION
6
INSTALLATION
6.1 MOUNTING
6.2 COOLING
6.3 OPERATING VOLTAGE
6.4 DENMARK
6.5 SWITZERLAND
6.6 GROUNDING
6.7 POWER CONSUMPTION
6.7.1 CALCULATION
7
CONNECTIONS
7.1 INPUT CONNECTIONS
7.1.1 BALANCED INPUTS
7.1.2 UNBALANCED INPUTS
7.2 CONNECTING SPEAKERS
8
OPERATION
8.1 OPERATING PRECAUTIONS
8.2 POWERING UP – SOFT START
8.3 INPUT ATTENUATORS
8.4 INDICATORS
9
PROTECTION FEATURES
9.1 OUTPUT LIMITER
9.2 THERMAL PROTECTION
9.3 VHF PROTECTION
9.4 SHORT CIRCUIT PROTECTION
9.5 AC MAINS VOLTAGE PROTECTION
9.6 DC. PROTECTION
10
MAINTENANCE
10.1 TROUBLESHOOTING
11
WARRANTY
12
SPECIFICATIONS MA1.6S
CONTENTS
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APPROVALS
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
3
3.1
EMC Emission
EMC Immunity
Electrical Safety
EN55103-1, E3
EN55103-2, E3, with S/N below 1% at normal operation level.
EN60065, Class I
WARNINGS
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
3.3
WARNING
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.
To reduce risk of fire or electric shock, do not expose
this apparatus to rain or moisture.
3.4
CAUTION
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.
2
Martin Audio – MA1.6s Amplifier
ENGLISH
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CONTENTS
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3
Martin Audio – MA1.6s Amplifier
ENGLISH
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All material © 2007. Martin Audio Ltd. Subject to change without notice.
4
Martin Audio – MA1.6s Amplifier
ENGLISH
4 INTRODUCTION
CONTENTS
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4.3
Rear Panel
1
3
4
CH. B
On
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5
6
7
8
5
CH.A LINK
INPUT CH.B LINK
4
CH. A
2
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OUTPUT CH.A
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MARTIN AUDIO
MA1. 6sMade in t he EEC by
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Current consumption: 9.7 A
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5
Martin Audio – MA1.6s Amplifier
ENGLISH
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All material © 2007. Martin Audio Ltd. Subject to change without notice.
6
Martin Audio – MA1.6s Amplifier
ENGLISH
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All material © 2007. Martin Audio Ltd. Subject to change without notice.
7
Martin Audio – MA1.6s Amplifier
ENGLISH
1RWHVIRUDPSOLILHUWHVWLQJ
127(&KDQQHO%LVDOZD\VSRODULW\UHYHUVHGRQWKHLQSXWDQGSRODULW\UHYHUVHGEDFNRQWKHRXWSXW2QFKDQQHO%
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ZLWKQRUPDOSRODULW\%\KDYLQJFKDQQHO$DQG%RSHUDWLQJLQRSSRVLWHSRODULW\WKHHQHUJ\VWRUDJHLQWKHSRZHU
VXSSO\LVPRUHHIILFLHQW7KLVLVVLJQLILFDQWIRUVLJQDOVEHORZ+]VXEEDVVHWFDQGLPSURYHVWKHSRZHU
EDQGZLGWK%HVXUHWRXVHEDODQFHGLQSXWVRQDOOPHDVXULQJHTXLSPHQWLQFOXGLQJRVFLOORVFRSHSUREHVLI
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CONTENTS
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GUIDES
ENGLISH
5.4
Impedance matching (MLS switch)
7KH0/6VZLWFKHVDUHORFDWHGRQWKHUHDUSDQHORIWKHDPSOLILHU7KH0/60LQLPXP/RDG6HOHFWVZLWFKHVRIIHU
LPSHGDQFHSRZHUPDWFKLQJVRWKDW\RXFDQGULYHWKH0$VLQWRRKPVZLWKRXWLQFUHDVHGKHDWORVV7KH0$
VFDQGHOLYHUZDWWVLQWRERWKDQGRKPV8VHORZHU0/6VZLWFKSRVLWLRQVZKHQFRQQHFWLQJWRORZHU
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MA1.6s
LOAD
CONFIGURATION
MLS SWITCH
SETTING
-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)
7DEOH
All material © 2007. Martin Audio Ltd. Subject to change without notice.
8
Martin Audio – MA1.6s Amplifier
CONTENTS
<
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GUIDES
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INPUT
- 3dB MLS
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GHOLYHUZDWWVLQWRWKHRKPORDG
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0 dB
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6 INSTALLATION
6.1
Mounting
7KHDPSOLILHULVWZRUDFNXQLWVKLJK8DQGZHLJKV.JOEVDQGZLOOPRXQWLQDVWDQGDUG(,$´UDFN
$PSOLILHUVPD\EHVWDFNHGGLUHFWO\RQWRSRIHDFKRWKHU7KHUHLVQRQHHGIRUVSDFLQJEHWZHHQXQLWV,ILWLVWKH
LQWHQWLRQWRILOODUDFNZLWKDPSOLILHUVZHUHFRPPHQGUDFNLQJLVVWDUWHGIURPWKHERWWRPRIWKHUDFN,WLVDOVR
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SDUWRIDSRUWDEOHV\VWHP
All material © 2007. Martin Audio Ltd. Subject to change without notice.
9
Martin Audio – MA1.6s Amplifier
ENGLISH
PRINT
CONTENTS
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GUIDES
Cooling
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GLUHFWLRQRIWKHDLUIORZ
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VSDFHWRDOORZWKHH[KDXVWDLUWRHVFDSH,IWKHDPSOLILHULVUDFNPRXQWHGGRQRWXVHFRYHUVRUGRRUVRQWKHIURQWRU
UHDURIWKHUDFN,IWKHKHDWVLQNWHPSHUDWXUHULVHVWRRKLJKVHQVLQJFLUFXLWVZLOOPXWHWKHKRWFKDQQHO,IWKHSRZHU
VXSSO\RYHUKHDWVDQRWKHUVHQVLQJFLUFXLWZLOOPXWHERWKRXWSXWFKDQQHOVXQWLOWKH\FRROGRZQWRDVDIHRSHUDWLQJ
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6.3
Operating voltage
:$51,1*
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IXVHRI$WKH0$VPXVWEHHTXLSSHGZLWKDQLQGXVWULDOPDLQVFRQQHFWRUUDWHGIRU$RUDERYHRUDVDQ
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6.5
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6.6
Grounding
7KHUHLVQRJURXQGOLIWVZLWFKRUWHUPLQDORQWKLVDPSOLILHU7KHVLJQDOJURXQGLVDOZD\VIORDWLQJYLDDUHVLVWRUWRFKDVVLV
DQGWKHJURXQG LQJV\VWHPLVDXWRPDWLF,IDSRWHQWLDOGLIIHUHQFHDERY H9LVGHWHFWHGEHWZHHQVLJQDOJURXQGDQG
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HTXLSPHQWRUDPSOLILHUVZLWKLQDV\VWHPVKRXOGGHY HORSDQHOHFWULFDOIDXOWWRHDUWKWKHPDLQVIXVHRQWKDWHTXLSPHQW
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,IKRZHYHU\RXZLVKWRSHUPDQHQWO\FRQQHFWWKHVLJQDOJURXQGWRFKDVVLVHDUWKFRQQHFWWKH;/5FRQQHFWRU¶VVKHOOOXJ
WRSLQ,QWKHLQWHUHVWRIVDIHW\QHYHUGLVFRQQH FWWKHHDUWKSLQRQWKHPDLQVFDEOH
7RFRPSO\ZLWK&(DSSURYDOUDGLRLQWHUIHUHQF HWKHUHLVDQ$&PDLQVILOWHU7KLVILOWHUQHHGVWKHFKDVVLVJURXQGIRU
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All material © 2007. Martin Audio Ltd. Subject to change without notice.
10
Martin Audio – MA1.6s Amplifier
ENGLISH
6.2
>
CONTENTS
<
>
GUIDES
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 replayed without continuous amplifier clipping; this corresponds to headroom of only 9dBs, which is very low for
normal program material.
MAX OUTPUT POWER
8 ohms
4 ohms
2 ohms
2x
2x
2x
Power
[W]
430
840
1200
1/3 Power
note 1
730
1330
2200
1/8 Power
note 2
480
840
1400
Idle
115
115
115
Average power with music as program source. The amplifier driven to clip level.
Normal music power with 9dB headroom, IEC standard power rating.
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 heavyduty 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
All material © 2007. Martin Audio Ltd. Subject to change without notice.
11
Martin Audio – MA1.6s Amplifier
ENGLISH
6.7
PRINT
CONTENTS
<
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GUIDES
ENGLISH
7 CONNECTIONS
7.1
Input connections
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;/5,QSXWFRQQHFWRUVDUHDFWLYHEDODQFHGDQGZLUHGDFFRUGLQJWRWKH,(&WKDWLVSLQKRWDQGZLUHGLQWKH
IROORZLQJZD\
3,1
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7,3
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CH. B
INPUT CH.B LINK
B´756SOXJ
CH.A LINK
Pin
XLR
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13
2 beScrn
Neg
Pos
grounded
1/ Sleeve
4“
Tip
Ring
Current
230STEREO GAIN
CH.B
24
LINK
consumpt
0V
/ BRIDGE
GAIN
CH.A
50
A+B
ion:
-6ON
OFF
0Hz
9.7A
GAIN
2
3
40
3
6
9
2
5
8
1 dB
6 7238
1
CH. A
INPUT
-3 dB MLS
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0 dB
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All material © 2007. Martin Audio Ltd. Subject to change without notice.
7RGDLV\FKDLQDPSOLILHUVXVHWKH;/5PDOH
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12
Martin Audio – MA1.6s Amplifier
CONTENTS
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7.2
Connecting speakers
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All material © 2007. Martin Audio Ltd. Subject to change without notice.
13
Martin Audio – MA1.6s Amplifier
ENGLISH
8QEDODQFHGOLQHFRQQHFWLRQ
CONTENTS
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Martin Audio – MA1.6s Amplifier
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