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Martin Audio – MA900 Amplifier

E

NGLISH

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11

 

WARRANTY

General

The MA900 Power amplifier is warranted to be free from defects in components and factory workmanship under
normal use and service, for a period of 

thre

e years from the date of original purchase. During this warranty period

MARTIN AUDIO LTD or it's nominated agents, will undertake to repair, or at it's discretion, replace this product at
no charge to it's owner, when failing to perform as specified, providing the unit is returned undamaged, in it's
original packaging, shipping prepaid, to the factory, distributor or authorised service facility.

This warranty shall be null and void, if the product is subjected to:
1)

Repair work or alteration by persons other than those authorised by MARTIN AUDIO LTD
or it's agents.

2)

Shipping 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 tear. Units on which the serial number has been removed or defaced will not be eligible for warranty
service.

3)

MARTIN AUDIO LTD shall not be responsible for any incidental or consequential damages, with respect to
the products warranted.

MARTIN AUDIO LTD reserve the right to make changes or improvements in design or manufacturing, without
assuming any obligation to change or improve products previously manufactured.

This warranty is exclusive and no other warranty is expressed or implied.
This warranty does not effect your statutory rights.

International

Please contact your supplier for this information, as rights and disclaimers may vary from country to country.

Technical assistance and services

If your Martin Audio product needs repair, contact your Martin Audio dealer or distributor, or contact Martin Audio
to obtain the location of the nearest dealer or distributor.
Telephone: +44 (0) 1494 535312
Fax: + 44 (0) 1494 438669
E mail: [email protected]

www

.martin-audio.com

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

Summary of Contents for MA900 - SCHEMATICS

Page 1: ...R AMPLIFIER TESTING 7 5 3 3 TANDEM MODE 7 5 3 4 BRIDGE MONO MODE 7 5 3 5 BRIDGE MONO MODE FEATURES 7 6 INSTALLATION 8 6 1 MOUNTING 8 6 2 COOLING 8 6 3 OPERATING VOLTAGE 8 6 4 GROUNDING 9 6 5 POWER CON...

Page 2: ...e 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 l...

Page 3: ...reach full output power if the input signal level is high enough 3 5 2 Speaker output hazard Power amplifiers are capable of producing hazardous output voltages To avoid the risk of electric shock do...

Page 4: ...2 Protect indicator This indicator 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 inp...

Page 5: ...page 13 4 Input signal XLR The Neutrik Combo jack is used which also features a _ TRS phone jacks Pin 2 is hot see page 10 5 Link Input A Phoenix screw terminal connector connected in parallel to the...

Page 6: ...o obtain full output power As the output power varies with the load impedance 4 ohms is usually taken as the reference The table below gives input volts rms Versus gain for full output power 1 t h d 1...

Page 7: ...e Link switches when using the amplifier for Bi amping 5 3 4 Bridge mono mode Bridge mono mode is used to deliver increased power to the loudspeakers Using the MA900 in bridge mode reduces the number...

Page 8: ...low the exhaust to escape If the amplifier is rack mounted do not use covers or doors on the front or rear of the rack Should a heat sink get too hot its sensing circuit will mute the hot channel If t...

Page 9: ...will operate for less than 2 minutes before thermally limiting or blowing the mains fuse Second the maximum expected average current under worst case program material which is 1 3 of full power accor...

Page 10: ...incorporate an XLR and _ 6 3mm jack They are active balanced and wired PIN 1 GROUND SHIELD PIN 2 HOT PIN 3 COLD XLR input connector XLR balanced TIP HOT RING COLD SLEEVE SHIELD GROUND _ TRS plug The...

Page 11: ...worldwide safety requirements The Speakons are wired Channel A output Pin 1 Pin 1 Output A Pin 2 Pin 2 Output B Channel B output Pin 1 Pin 1 Output B The right Speakon Channel A has both channel A an...

Page 12: ...input level attenuators on the front panel adjust the signal level for their respective amplifier channel in all modes They are calibrated in dB s to help setting up active loudspeaker systems In brid...

Page 13: ...hes 90 C 9 2 VHF protection If a signal of more than 12kHz at full power is detected which lasts for more than five seconds the VHF protection mutes the input signal This is indicated on the front pan...

Page 14: ...loudspeaker this can occur when the speaker coil gets warm Fault The amplifier goes into protection with power indicators off Check that the AC mains voltage is within the amplifier s operating range...

Page 15: ...quipment exposure to inclement weather conditions and normal wear and tear Units on which the serial number has been removed or defaced will not be eligible for warranty service 3 MARTIN AUDIO LTD sha...

Page 16: ...both channels driven 3 5Arms 7Arms 1 3rd Full power both channels driven 5 5Arms 11Arms Full power 1Khz 1 thd 9 5Arms 19 Arms DISTORTION THD 20Hz 20KHz 1W to full power 0 03 THD 1KHz 1dB below clip 0...

Page 17: ...x Red LED s Indicators Signal Present 2 x Green LED s REAR PANEL Input Connectors 2 x Neutrik Combo 3 pin Phoenix Output Connectors 2 x Neutrik Speakons Clip Limiters Push Switch ON OFF per Channel S...

Page 18: ...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 Please Click here to return to main menu Please Click...

Page 19: ...The Martin Experience ENGLISH MA900 Amplifier User s Guide All material 2007 Martin Audio Ltd Subject to change without notice...

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