Martin Audio MA2.8 Spécifications Page 1

Martin Audio – MA2.8 Power AmplifierCONTENTS (ENGLISH) Page No1 UNPACKING 22 WARNINGS 23 USER RESP

Do not use XLR and TRS jacks on the same channel simultaneouslyfor mixing or other purposes.Figure 6. Balanced lineTo use an unbalanced source, connec

5.7 Connecting speakersSpeaker connections are made via the two Neutrik NL4FC Speakonconnectors (1). These connectors meet the EC safety requirements

[1] Component tolerance dependent.Table 2.[2] Continuous power, one channel driven or peak power both channels driven.(Thermal protection may occur at

Figure 10. MLS switches on rear panel6 OPERATION MODES6.1 Stereo operationFor stereo (dual channel) operation, leave the Link and Phase reverseswitche

6.3 Bridged monoTo bridge the amplifier, depress the Link switch (7) and Phase reverse switch(6). Both channels are then driven by a single signal at

Figure 12. Stereo reverse modeChannel A output is connected as in the normal stereo mode. By havingchannel A and B operating in opposite polarity, the

7.3 Input attenuatorsThe two input level attenuators on the front panel adjust the signal level fortheir respective amplifier channel in all modes. Th

8 PROTECTION FEATURES Each MARTIN AUDIO MA Series amplifier has many advanced protectionfeatures that will protect both the amplifier and the speakers

input signal. (This is indicated on the front panel (3) labelled “Protect”). After five seconds the outputs will un-mute and return to normal operatio

9 DESIGN FEATURES CoolingMARTIN AUDIO MA Series amplifiers run very cool due to a patented heatexchanger. The bi-polar output devices are mounted dire

1 UNPACKINGEach Martin Audio MA Series amplifier is built to the highest standard andthoroughly inspected before it leaves the factory. After unpackin

Figure 14. Current-voltage characteristic of different power supply topologies.1) Conventional power supply shows voltage drop due to internal resista

10 SPECIFICATIONS Safety approvalsMARTIN AUDIO MA Series amplifiers are designed to meet EN60065electrical safety standards. EMC approvalsEMC stands f

11 APPENDIX A Mains voltage selectionAll Martin Audio MA Series amplifiers are normally shipped for 230 Volt ACoperation only.For use on 115 Volts AC,

12 MAINTENANCE Under normal use the amplifier should give years of trouble free service.The only user maintenance required from the user is to vacuum

13 WARRANTY GeneralThe MA2.8 Powered Amplifier is warranted to be free from defects incomponents and factory workmanship under normal use and service,

14 TECHNICAL SPECIFICATIONS MA2.8INPUT IMPEDANCE 20kohms (balanced) 10kohms single endedGAIN SELECT SWITCH 38dB (I/P sens 0.775V), 32dB (I/P sens 1.55

MA2.8 Power AmplifierCentury Point, Halifax Road, Cressex Business Park, High Wycombe, Buckinghamshire HP12 3SL, England. Telephone: +44 (0)1494 535

MARTIN AUDIOLONDONThe Martin ExperienceENGLISHMA2.8 Power AmplifierUser’s Guide<>PRINTGUIDESCONTENTSAPPLICATIONS GUIDE

3 USER RESPONSIBILITY3.1 Speaker damageMany loudspeakers can be easily damaged or destroyed by overpowering,especially with the high power available f

4 INTRODUCTIONThank you for purchasing a MARTIN AUDIO power amplifier. This manualcontains important information on operating your amplifier correctly

5. Fan grille filterA foam filter is located behind the front panel grille to prevent dust enteringthe amplifier.6. Power switchThis is used to power

5 INSTALLATION5.1 MountingThe amplifier is two rack units high (2U) and will mount in a standard EIA19'' rack. Amplifiers may be stacked dir

BROWN - LIVEBLUE - NEUTRALGREEN/YELLOW - EARTHOnce connected to a suitable AC supply, the amplifier can be started withthe power switch. When you powe

Martin Audio – MA2.8 Power AmplifierENGLISH8MAX OUTPUT POWER MAINS INPUT POWERPower Full Power 1/3 Power 1/8 Power Idlesine wave note 1 note 2MA2.8 8

There are also TRS jacks for linking etc. They are wired as follows:TIP - HOT (+)RING - COLD (-)SLEEVE - SHIELD/SIG. GROUNDFigure 4. TRS phone plugThe