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Martin Audio – MA1.6 Power Amplifier

CONTENTS (ENGLISH) Page No

USER RESPONSIBILITY

Radio interference

Operating voltage

Power consumption

Input connections

Connecting speakers

Impedance matching (MLS switch)

OPERATION MODES

Stereo operation

Operation precautions

Powering up - Soft start

Input attenuators

PROTECTION FEATURES

DESIGN FEATURES

TECHNICAL SPECIFICATIONS

MARTIN AUDIO

L O N D O N

The Martin Experience

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CONTENTS

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GUIDES

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Содержание MA1.6

Страница 1: ...Input connections 8 5 7 Connecting speakers 11 5 8 Impedance matching MLS switch 11 6 OPERATION MODES 12 6 1 Stereo operation 12 6 2 Tandem mono 12 6 3 Bridged mono 12 6 4 Stereo reverse 13 7 OPERATIO...

Страница 2: ...any other voltage source such as battery mains source or power supply regardless of whether the amplifier is turned on or off Do not run the output of any amplifier back into another channel s input...

Страница 3: ...roduct uses radio frequency energy and if not used or installed in accordance with these operating instructions may cause interference to other equipment Compliance with the EMC directive does not aut...

Страница 4: ...r illuminates if the amplifier attempts to function above its maximum operating temperature 90 C The indicator first comes on as a warning to either turn down the input level or check the cooling arra...

Страница 5: ...luminates when the 2 ohms position is selected see page 11 3 Clip limiter switch Turns the clip limiter on and off See page 16 4 Input jack Alternative to using input XLR or for linking inputs with ot...

Страница 6: ...upply in front of the amplifier and that the rear of the amplifier has sufficient space to allow the exhaust to escape If the amplifier is rack mounted do not use covers or doors on the front or rear...

Страница 7: ...nd for reference otherwise a current loop is formed via the signal ground Use the balanced input to avoid hum and interference 5 5 Power consumption There are three ways to define the power current co...

Страница 8: ...ast the current at 1 8 power or 1 3 power for heavy duty demand like discos etc The heat power can be calculated as the following example If we consider a headroom of at least 9dB and a 4 ohm load on...

Страница 9: ...isy chain use the TRS jacks provided on each channel The input circuits also have high enough headroom to accept the maximum output level from virtually any low level signal source Figure 5 Rear panel...

Страница 10: ...onnected to the shield at the source The hum and noise rejection for the cable is equivalent to that for a balanced line To minimize hum in the audio use balanced inputs whenever possible Figure 8 Bal...

Страница 11: ...ember that the speaker cable robs the power of the amplifiers in two ways It increases the load impedance and introduces resistive power losses 5 8 Impedance matching MLS switch The MLS switch is loca...

Страница 12: ...in parallel 6 3 Bridged mono To bridge the amplifier depress the Link switch 7 and Phase reverse switch 6 Both channels are then driven by a single signal at either input You can use any remaining inp...

Страница 13: ...channel B to speaker positive terminal Figure 11 Stereo reverse mode Channel A output is connected as in the normal stereo mode By having channel A and B operating in opposite polarity the energy stor...

Страница 14: ...his is known as the soft start or slow start sequence The fans then blow at high speed before going into idle and the two bottom green LED s illuminate to show the amplifier is operational 7 3 Input a...

Страница 15: ...Each MARTIN AUDIO MA Series amplifier has many advanced protection features that will protect both the amplifier and the speakers connected to it should a fault condition arise Under normal use these...

Страница 16: ...protection will be re initiated Thermal protection starts when the heatsink reaches a temperature above 90 C VHF protection If a signal of more than 12kHz at full power is detected at the amplifier ou...

Страница 17: ...mounted directly onto a copper heat sink thereby avoiding thermal losses normally found when using mica washers The heat sink is mounted horizontally in front of a pressure chamber and the air flow is...

Страница 18: ...n their output impedance producing uncontrollable speaker cone movement MARTIN AUDIO SMPS produces its rated power output at all frequencies regardless of speaker demands and AC line conditions Minimu...

Страница 19: ...ts and bursts up to 1kV conducted through the cables to the unit Electromagnetic fields up to 3V m radiated on the unit and the cables in the frequency range of 27 500MHz We have extended the tests in...

Страница 20: ...t AC operation only For use on 115 Volts AC internal modifications to the power supply board must be made Warning This modification should only be carried out by an experienced service technician Plea...

Страница 21: ...If it is remove possible high frequency oscillations from the relevant input Fault The amplifier goes into thermal protection when driven at low level Check that your loudspeaker has not got a short c...

Страница 22: ...ng accidents act of God war civil insurrection misuse abuse operation with incorrect AC voltage operation with faulty associated equipment exposure to inclement weather conditions and normal wear and...

Страница 23: ...at 1kHz and 750W 4 ohms 0 01 DIM 30 at 400W 4 ohms 0 008 CCIF 13 and 14kHz at 200W 4 ohms 0 008 SMPTE 860Hz and 7kHz at 400W 4 ohms 0 01 POWER MATRIX MLS SWITCH SETTING LOAD CONFIGURATION 4 ohms 2 ohm...

Страница 24: ...kinghamshire HP12 3SL England Telephone 44 0 1494 535312 Facsimile 44 0 1494 438669 Web www martin audio com E mail info martin audio com The Martin Experience MARTIN AUDIO L O N D O N Please Click he...

Страница 25: ...MARTIN AUDIO L O N D O N The Martin Experience ENGLISH MA1 6 Power Amplifier User s Guide CONTENTS PRINT GUIDES...

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