Martin Audio MA4.2s User manual

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
1
CONTENTS (ENGLISH) Page No
1CONTENTS 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
4INTRODUCTION 4
4.1 UNPACKING 4
4.2 FRONT PANEL 4
4.3 REAR PANEL 5
5REAR 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
6INSTALLATION 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
7CONNECTIONS 12
7.1 INPUT CONNECTIONS 12
7.1.1 BALANCED INPUTS 12
7.1.2 UNBALANCED INPUTS 13
7.2 CONNECTING SPEAKERS 13
8OPERATION 14
8.1 OPERATION PRECAUTIONS 14
8.2 POWERING UP – SOFT START 14
8.3 INPUT ATTENUATORS 14
8.4 INDICATORS 15
9PROTECTION 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
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com
all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
2
2APPROVALS
This equipment is tested and approved to the U.S. safety standard ANSI/ UL 6500 and Canadian safety standard
CSA E60065-00 by ITS ETL SEMKO they are a Nationally Recognized Testing Laboratory (NRTL).
The ETL Listed Mark is recognized by local inspectors and
Authorities Having Jurisdiction (AHJs) throughout North
America and also in some areas of South America. ITS ETL
SEMKO is a NRTL recognized by OSHA (Occupational Safety
and Health Administration), the ETL Listed Mark is an accepted
alternative to UL and, as such, inspectors and AHJs are
required by law to recognize, acknowledge, and accept the
mark as proof of product compliance.
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 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 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.
!
!
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
3
!













%
%
%
%
%
%




3.5User responsibility
/RXGVSHDNHUGDPDJH


            



/RXGVSHDNHURXWSXWKD]DUG

              

5DGLRLQWHUIHUHQFH
                 
            






%
%






!
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
4
%

%              


%
4INTRODUCTION



4.1Unpacking






4.2Front Panel
-40dB
PROTECT
CLIP
ON
PROTECT
CLIP
-40dB
ON
MA4.2s
AC
AFS
1
0
17 3427
9
65 2
8
10
&DUU\ S U R W H F W L R Q  K D Q G O H



,QSXWOH HODWWHQXDWRUV

4
3URWHFWLQGLFDWRU/('




                                                                                      
                                                                                     
6
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
5
&OLSOLPLWLQGLFDWRU
                                                                                                        
                            5

6LJQDO  S U H V H Q W LQGLFDWRU
                                              
2QLQG L F D WRU
     
)DQJU L O OHILOWHUV
                                                                               
                                                                                              
3RZHUVZLWFK
                   
0
$&LQG L F D WRU

$)6LQGLFDWRU

4.3Rear Panel
CH. B CH. A INPUT INPUTCH. A LINK CH.B LINK
GAIN
41dB
38dB
35dB
32dB
29dB
26dB
23dB
20dB
678
123
GAI N
CH.B GAI N
CH . A
LINK/ BRIDGEA+B
ON
OFF
Current consumption: 7.8A
230-240V 50-60Hz
1+ CH.B+
1- CH.B-
Ser. No :
OUTPUT CH.A
Clip L imit e r A
On
Off
STEREO
1+CH.A+
1-CH.A-
2+CH.B+
2-CH.B-
BRIDGE
Pin 1+ Spk +
2- Spk-
Pat ents SE 9 0 03426
EP 0483094
US 5200711
Clip Limiter B
On O
ff
0
-2
-4
-5
MLS switch
dB
MLS switch
dB
OUTPUT CH.B
STEREO
Mus t be grounded
XLR
Pin 1 Scrn Sleeve
2 Pos Tip
3 Neg Ring
1/ 4“
Made in the EEC by MA4.2s
-2
-5
-4
0
145678541
393
2 2
2XWSXW6SHDNHUFRQQHFWRU


0LQLPXPORDGVHOHFWRU0/6VZLWFK
8
&OLSOLPLWHUVZLWFK
   5
,QSXWVLJQDO;/51/42
/LQN,QSXW
*DLQVZLWFKFKDQQHO%

All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
6
!
/LQNDQG3RODULW\UH HUVHVZLWFK

*DLQVZLWFKFKDQQHO$

$&0DLQVFDEOH:$51,1*
$ODEHOMXVWEHORZWKHPDLQVFDEOHRQWKHUHDURIWKHDPSOLILHULQGLFDWHVWKHVHOHFWHG$&PDLQV
RSHUDWLQJ ROWDJH&RQQHFWWKHPDLQVFDEOHRQO\WRWKH$&VRXUFHUHIHUUHGWRRQWKHODEHO
5REAR PANEL FEATURES
5.1Gain switch

                                              
       
                                                                                           
  



      
                 
           
                                                       
                                      
                                                           
                                    
      
        
      


*DLQ




6HQVLWL LW\








        
        
        
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com
all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
7
2SWLRQV
   
                 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     
 
5.2Link switch


5.3Operating modes
6WHUHRPRGH


 

1H HUFRQQHFWHLWKHURXWSXWWHUPLQDOWRJURXQGRULQSDUDOOHO

1RWHVIRUDPSOLILHUWHVWLQJ
  



%HVXUHWRXVHEDODQFHGLQSXWVRQDOOPHDVXULQJHTXLSPHQWLQFOXGLQJRVFLOORVFRSHSUREHVLI
\RXDUHEHQFKWHVWLQJ
5HYHUVHRSHUDWLRQRI&KDQQHO%
7DQGHPPRGH

 

 1H HUFRQQHFWHLWKHURXWSXWWHUPLQDOWRJURXQGRULQ
SDUDOOHO

127($OZD\VWXUQRIIWKH/LQNVZLWFKZKHQXVLQJWKHDPSOLILHUIRU%LDPSLQJ
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
8
%ULGJHPRQRPRGH



 







%ULGJHPRQRPRGHIHDWXUHV






5.4Impedance matching (MLS switch)


                                                              
    

0/6
                                                                                                 
                  

                                                                                             

All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
9
MA4.2s MLS SWITCH SETTING
LOAD CONFIGURATION -5 dB -4 dB -2 dB 0 dB
16 ohms Stereo (2 channel) 220 w 260 W 410 W 650 W
8 ohms Stereo (2 channel) 430 W 520 W 820 W 1300 W
4 ohms Stereo (2 channel) 830 W 1000 W 1600 W 2300 W
2 ohms Stereo (2 channel) 1660 W 2000 W 2400 W 2900 W [1]
3050 W [2] 3200 W [2]
16 ohms Bridged mono 860 W 1040 W 1640 W 2600 W
8 ohms Bridged mono 1660 W 2000 W 3200 W 4600 W
4 ohms Bridged mono 3320 W 4000 W 4800 W 5800 W [1]
[1] Component tolerance dependent
[2] Continuous power, one channel driven or peak power both channels driven.
(Thermal protection may occur at high continuous power).
Power in watts (EIA 1 kHz, 1% THD)
7DEOH
7KH0/6WHFKQRORJ\
0/6VZLWFKHVRQUHDUSDQHO
7KHSUREOHP

















7KHVROXWLRQ




7\SHRIPRGH 3RZHU,PSHGDQFH
&K$ &K%
&RQYHQWLRQDOPRGH  
 
 
+LJKYROWDJHPRGH 9UPV 9UPV
 
 
/RDGPDWFKLQJ  
 
 
3RZHUVKDULQJ  
 
 
/LPLWHG RZHU  
 
 
%LDP PRGH  
 
 
 
7DEOH
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
10



6INSTALLATION
6.1Mounting





6.2Cooling










1

6.3Operating voltage
:$51,1*
$ODEHOMXVWEHORZWKHPDLQVFDEOHLQOHWRQWKHUHDURIWKHDPSOLILHULQGLFDWHVWKHVHOHFWHG$&PDLQV
RSHUDWLQJ ROWDJH&RQQHFWWKHPDLQVFDEOHRQO\WRWKH$&VRXUFHUHIHUUHGWRRQWKHODEHO7KHZDUUDQW\
ZLOOQRWFR HUGDPDJHFDXVHGE\FRQQHFWLQJWRWKHZURQJW\SHRI$&PDLQV
  

%/$&.RU  % 5 2 : 1 / , 9 (
:+,7(RU%/8( 1(875$/
*5((1RU  * 5 ( ( 1  < ( / / 2 : ( $ 5 7 + 
                                                                                            
                                                                                       


6.4Denmark:




6.5Switzerland:

           
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
11
6.6Grounding
                                                               


                                                                                            
                                                        


                                       

1H HUGLVFRQQHFWOLIWWKHPDLQVVDIHW\HDUWK
6.7Power consumption

)LUVW




6HFRQG


/DVW





$)6$XWRPDWLF)XVH6D HU
6
&DOFXODWLRQ
7KHFXUUHQWGUDZ


7KHKHDWSRZHU



3RZHU $)6DFWLYDWHG 3RZHU 3RZHU ,GOH
>:@ >:@ QRWH QRWH
0$V RKPV [     
RKPV [     
RKPV [     
ZLOOEHUHGXFHGE\$)6OLPLWHU
QRWH $YHUDJH RZHUZLWKPXVLFDV URJUDPVRXUFH7KHDP OLILHUGULYHQWRFOL OHYHO
QRWH 1RUPDOPXVLF RZHUZLWKG%KHDGURRP,(&VWDQGDUG RZHUUDWLQJ
0$,16,138732:(50$;28738732:(5
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com
all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
12
7KHKHDWSRZHUSURGXFHG

0$V+($732:(5
           
  
       
       
       


7CONNECTIONS
7.1Input connections
%DODQFHGLQSXWV
              ,(&

  
  
  

;/5LQSXWFRQQHFWRU ;/5EDODQFHG
1/4
  
  
  

B´756SOX

 

 
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
13
7RGDLV\FKDLQDPSOLILHUV/LQN

8QEDODQFHGLQSXWV
                                  
           
 
   
                                                                      
8QEDODQFHGOLQHFRQQHFWLRQ
%DODQFHGOLQHZLWKXQEDODQFHGHTXLSPHQW


7.2Connecting speakers

                                                              



 
 

 



&KDQQHO$DQG%LQWRWZRVHSDUDWH
6SHDNRQV
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
14
&KDQQHO$DQG%LQWRRQH6SHDNRQ
6WHUHRDQG%LDPS %ULG HGPRQR
1H HUFRQQHFWHLWKHURXWSXWWHUPLQDOWRJURXQGRUWRVRPHRWKHURXWSXWRULQSXWWHUPLQDOVHHZDUQLQJVLQ
FKDSWHU

3D\DWWHQWLRQWRVSHDNHUSRODULW\ORXGVSHDNHUVFRQQHFWHGRXWRISRODULW\GHJUDGHVRXQGTXDOLW\



:$51,1*7RSUH HQWHOHFWULFVKRFNGRQRWRSHUDWHWKHDPSOLILHUZLWKDQ\RIWKHORXGVSHDNHU
FDEOHFRQGXFWRUVH[SRVHG
8OPERATION
8.1Operation precautions
% 
0
%
0
%
58

%

8.2Powering up – Soft start

                                                                                     
                   
                              
8.3Input attenuators

              

                                   
    
8.4Indicators
 
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
15


-40dB
PROTECT
CLIP
ON
PROTECT
CLIP
-40dB
ON
MA4.2s
&OLSOLPLWLQGLFDWRU                                      
%
% 
5
9PROTECTION FEATURES
                                            

          
9.1Output Limiter
                                                 
              


                                                                                  
              


          



 
9.2Thermal protection

            
      
                                                   
                                                                  
        


9.3VHF protection


All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
16


9.4Short circuit protection



9.5Automatic Fuse Saver, AFS- limiter
                                                                      
                                                                                            
                                                                             
 











9.6AC mains voltage protection



 

                                                 
 
9.7The “AC” LED






9.8DC. protection
                             
%
%

All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com
all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
17
10MAINTENANCE






10.1Troubleshooting

)DXOW1RRXWSXW




)DXOW7KHDPSOLILHUJRHVLQWRWKHUPDOSURWHFWLRQZKHQGUL HQDWORZOH HO


)DXOW7KHDPSOLILHUJRHVLQWRSURWHFWLRQZLWKSRZHULQGLFDWRUVRII




)DXOW7KHDPSOLILHUGRHVQRWUHVSRQGH HQDIWHUFKHFNLQJDER HLWHPV


0DUWLQ$XGLRFDQQRWEHKHOGUHVSRQVLEOHIRUGDPDJHRULQMXU\DVDUHVXOWRIWKHWRSFR HUEHLQJUHPR HG
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
18
11WARRANTY
*HQHUDO

thre
 



  

 



  

 



,QWHUQDWLRQDO

7HFKQLFDODVVLVWDQFHDQGVHU LFHV
,QWHUQDWLRQDO






All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
19
12SPECIFICATIONS MA4.2S
0$;,08028738732:(5
0/6LQG%SRVLWLRQ
 
1  
1  
1  
1  
1  
0$;,08028738792/7$*(
1 
  
32:(55(48,5(0(176 9 HUVLRQ 9 HUVLRQ
  
  
  
0$,16&855(17'5$:#2KPV V HUVLRQ 9 HUVLRQ
  
  
  
  
',67257,21
 
 
 
+8012,6( 
&+$11(/6(3(5$7,21 
287387,03('$1&( 1
6/(:5$7( +
,13876

1
 1
1
 
',0(16,216 

        
        
        
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com

Martin Audio – MA4.2s (ETL) Amplifier
ENGLISH
20
:(,*+7 
6+,33,1*',0(16,216 

6+,33,1*:(,*+7 
)URQW3DQHO
 
 
 
 
 
 
5HDU3DQHO
 
 
   
 
¸º
¸¸
All material © 2007. Martin Audio Ltd. Subject to change without notice.
All manuals and user guides at all-guides.com