Martin Audio MA200Q User's Manual
Contents
1. LINK SWITCH 7 Martin Audio MA200Q Amplifier 5 4 3 Tandem mode In tandem mode two or four of the amplifiers inputs are linked together To use only one input signal to drive inputs A or B press the A B link bridge switch and connect a signal to inputs A or B In this configuration loudspeaker 1 would then be connected across 1 and 1 and loudspeaker 2 across 2 and 2 of the OUTPUT A B Speakon connector To use only one input signal to drive inputs C and D press the C D link bridge switch and connect a signal to inputs C or D loudspeaker 3 would be connected across 1 and 1 and loudspeaker 4 across 2 and 2 of the OUTPUT C D Speakon connector To use only one input signal to drive all four channels press IN the A B link bridge switch the C D link bridge switch and the link B C switch All attenuators are active allowing you to set different levels for each channel Note that only the inputs are connected in parallel This is NOT a parallel output mode Never connect either output terminal to ground or in parallel You can use the remaining input connectors to parallel off Daisy chain signal to other amplifiers NOTE Always turn off the Link switches when using the amplifier for dual Bi amping 5 4 4 Bridge mono mode Bridge mode is used to deliver increased power to the loudspeakers Using the MA200Q in bridge mode reduces t2. ie 0 r SLEEVE SHIELD GROUND GND The input impedance is high enough 20K ohms balanced to allow daisy chaining or multiple parallel input connections The headroom of the input circuits is also high enough to accept the maximum output level Fred goin 82 aB from virtually any low level signal source Balanced 7 J IMAI signals are less sensitive to AC hum and radio l i ae interference The source impedance should be less ree than1Kohms to avoid high frequency losses in long signal cables 7 41 2 Unbalanced inputs To connect an unbalanced source connect pin 3 ring on TRS jack to the shield of the connector If you leave one pin disconnected you will lose 6 dB s in level A better method of connecting unbalanced sources is shown in below This is similar to the connection for balanced lines but pin 3 is connected to the shield at the source The hum and noise rejection for the cable is equivalent to that of a balanced line To minimize hum in the audio use balanced inputs whenever possible Unbalanced line connection Balanced line with unbalanced equipment M A AMPLIFIER M A AMPLIFIER 7 2 Connecting loudspeakers Loudspeaker connections are made via the two Neutrik NL4FC Speakon connectors The Speakon connector is designed for high power loudspeaker use and meets all worldwide safety requirements Connections The Speakon
3. Standard Applied EMC Emission EN55103 1 E3 EMC Immunity EN55103 2 E3 with S N below 1 at normal operation level Electrical Safety EN60065 Class 3 WARNINGS 3 1 Explanation of graphical symbols 4 The lightning symbol within a triangle is The exclamation mark within a triangle is intended to alert the user to the intended to alert the user to presence of presence of lethal voltages within the amplifier important operating and service instructions in that are of sufficient magnitude to constitute a the literature accompanying the product risk of electric shock to humans 3 2 WARNING 3 3 CAUTION To reduce risk of fire or electric shock do not To reduce the risk of fire or electric shock do expose this apparatus to rain or moisture 4 not remove screws There are no user lt 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 the safety suggestions 1 Keep this manual for future reference 2 Do not operate this 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 unit 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 instr
4. Mains cable WARNING A label just below the mains cable on the rear of the amplifier indicates the selected AC I mains operating voltage Connect the mains cable only to the AC source referred to on the label 5 REAR PANEL FEATURES 5 1 Gain The gain of the MA200Q is fixed at 32 dB 5 2 Sensitivity Sensitivity is volts rms or dBu referred to 0 775Vrms that are required to obtain full output power As the output power varies with the load impedance the table below lists sensitivity versus load configuration MA200Q Sensitivity CONFIGURATION Voltrms dBu 16 ohmsQuad 4 chanrel sQuad 4 chanrel sQuad 4 chanrel sQuad 4 chanrel 16 ohmsStereo 2 channds bridged SS tereo 2 channds bridged sStereo 2 channds bridged 6 Martin Audio MA200Q Amplifier 5 3 Link switch The Link switches located on the rear panel between the four XLR input connectors are for changing the operating modes of the amplifier By using a combination of these switches and input output wiring it is possible to have several operating configurations See below section 5 2 HSITINED 5 4 Operating modes 5 4 1 Stereo mode For 2 x stereo 2 x bi amp or 4 channel quad oD ic nurs CHB OHA use all channels operate independently of each other and all the link switches are OUT For a 2 x stereo configuration the input designation is CH A left input 1 CH B right input 1 CH C left input 2 and C
5. driven with positive voltage at one pole and an equivalent negative voltage at the other pole So if an 8 ohms load is connected in bridged mode one channel shares one 4 ohms part of the load and the other channel shares the other 4 ohms part The power into 4 ohms from an MA200Q is 200W So the total bridged power into the 8 ohms load will be 2 x 200 400W 6 INSTALLATION 6 1 Mounting The amplifier is two rack unit s high 2U and weighs 13 2Kg 29lbs and will mount in a standard EIA 19 rack Amplifiers may be stacked directly on top of each other There is no need for spacing between units If it is the intention to fill a rack with amplifiers we recommend racking is started from the bottom of the rack It is also recommended that rear supports are used for amplifiers mounted in the middle of the rack especially if used as part of a portable system 6 2 Cooling Your amplifier uses a forced air cooling system to maintain a low and even operating temperature All fan cooled MARTIN AUDIO MA Series amplifiers have front to rear cooling Never try to reverse the airflow as the amplifier needs a pressure chamber between the fans and heat sink and this only operates in one direction of the airflow Make sure that there is an adequate air supply 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
6. loudspeaker cable conductors exposed 8 OPERATION 8 1 Operation precautions e Make sure that the power switch is set to OFF before connecting any input or output or operating the switches on rear panel See pages 9 about installation e Make sure that the AC mains voltage is correct and is the same as the one printed on the rear panel of the amplifier See pages 9 and 10 about operating voltage and power consumption e Make sure that the switches on the rear panel for the different operating modes and the clip limiter switches are in the correct position See page 7 about operating modes and page 14 about clip limiters e tis always a good idea to turn down the gain controls during power up to prevent speaker damage in case a high signal is present at the input 13 Martin Audio MA200Q Amplifier HSITINED 8 2 Powering up Soft start When you power up the amplifier it takes a couple of seconds to self check This is known as the soft start or slow start sequence The fans then blow at high speed before going into idle and the four bottom green LED s illuminate to show the amplifier is operational 8 3 Input attenuators The four input level attenuators on the front panel adjust the signal level for their respective amplifier channel s in all modes of operation They are calibrated in dB s to help the setting up of active loudspeaker systems In bridged mode both level attenuators must be in the same pos
7. sold in the EC must be approved for immunity against electromagnetic fields high voltage flashes and radio interference e Consult your dealer or an experienced radio TV technician for help 4 INTRODUCTION Thank you for purchasing a Martin Audio power amplifier This manual contains important information on operating your amplifier correctly and safely Please take some time to read this manual and familiarize yourself with the advanced features of this amplifier 4 1 Unpacking Each Martin Audio MA series amplifier is built to the highest standard and thoroughly inspected before it leaves the factory After unpacking the unit examine it carefully for any signs of transit damage and inform your dealer if such damage is found It is suggested that you retain the original packaging so that the unit can be repackaged at a future date if necessary Please note that Martin Audio and its distributors cannot accept responsibility for damage to any returned product through the use of non approved packaging 4 2 Front Panel oN EN NFA F oN B 3 2 7 5 4 5 Z 6 3 a maceram MA 208 0 recut v 1 Input level attenuators These controls are used to set the signal level entering the amplifier They are calibrated in dB s to assist the setup of active loudspeaker systems See page 14 4 Martin Audio MA200Q Amplifier HSITINED 2 Protect indicator LED This indicator illumina
8. 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 locatio
9. CONTENTS ENGLISH 1 2 3 10 11 12 CONTENTS MA200Q USER GUIDE APPROVALS 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 INTRODUCTION 4 1 UNPACKING 4 2 FRONT PANEL 4 3 REAR PANEL REAR PANEL FEATURES 5 1 GAIN 5 2 SENSITIVITY 5 3 LINK SWITCH 5 4 OPERATING MODES 5 4 1 STEREO MODE 5 4 2 NOTES FOR AMPLIFIER TESTING 5 4 3 TANDEM MODE 5 4 4 BRIDGE MONO MODE 5 4 5 BRIDGE MONO MODE FEATURES INSTALLATION 6 1 MOUNTING 6 2 COOLING 6 3 OPERATING VOLTAGE 6 4 GROUNDING 6 5 POWER CONSUMPTION 6 5 1 CALCULATION CONNECTIONS 7 1 INPUT CONNECTIONS 7 1 1 BALANCED INPUTS 7 1 2 UNBALANCED INPUTS 7 2 CONNECTING LOUDSPEAKERS OPERATION 8 1 OPERATION PRECAUTIONS 8 2 POWERING UP SOFT START 8 3 INPUT ATTENUATORS 8 4 INDICATORS 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 MAINTENANCE 10 1 TROUBLESHOOTING WARRANTY SPECIFICATIONS MA200Q 3 Martin Audio MA200Q Amplifier Page No OOOO WA AONNNNDOOAARA AA OOODMDDMDTMKENDEDNENN N HSITINED 2 APPROVALS This equipment conforms to the requirements of the EMC directive 89 336 EEC amended by C E 92 31 EEC and 93 68 EEC and the requirements of the Low Voltage Directive 73 23 EEC amended by 93 68 EEC
10. H D is right input 2 For 2 x biamp CHA bkBdgeA B o Trl input would be LF1 CH B input HF1 CH C input LF2 and CH D input HF2 ze0 24o Sook Cannot The attenuators on the front panel will control the respective channels levels Never connect either output terminal to ground or in parallel The recommended minimum impedance for quad or tandem stereo operation is 2 ohms per channel 5 4 2 Notes for amplifier testing NOTE Channels B and D are always polarity reversed on the input and polarity reversed back onthe output On channels B and D outputs the positive output voltage with respect to OV appears on pin 2 of the Speakon connector Channel A and C outputs are connected with normal polarity By having channel A and B and C and D operating in opposite polarity the energy storage in the power supply is more efficient This is significant for signals below 100 Hz sub bass etc and improves the power bandwidth Be sure to use balanced inputs on all measurement equipment including oscilloscope probes if you are bench testing A B_ INPUT S H LINK SWITCH 10 1 e0 o ka s sF 2 1 en is 1 CH B H Y 2 1 8 T l C B C INPUT o 41 o 14 oar LINK SWITCH SWITCH e e 4 l 1 S pa i l cH c 20 CLL JF7 s za w C D INPUT e 7 Q X
11. PING WEIGHT Front Panel Gain controls Indicators Protect Indicators Clip Indicators Signal Present Rear Panel Input Connectors Output Connectors Clip Limiters Input Link switches Speakond and Comb jack are registered Trademarks of Neutrik AG Liechtenstein 13 2Kg 29lbs W 560mm x H 180mm x D 500mm W 22ins x H 7 1ins x D 19 7ins 14 8Kg 32 5lbs 4 x 31 Position detent 4 x Yellow LED s 4 x Red LED s 4 x Green LED s 4 x Neutrik Combo 3 pin Phoenix 2 x Neutrik Speakons Push Switch ON OFF per Channel A B C D B C 19 Martin Audio MA200Q Amplifier HSITINED convents lt gt Pret MA200Q Amplifier Please Click here to return to main menu Please Click here to visit our website M MARTIN AUDIO LONDON The Martin Experience Century Point Halifax Road Cressex Business Park High Wycombe Buckinghamshire HP12 3SL England Telephone 44 0 1494 535312 Facsimile 44 0 1494 438669 Web www martin audio com E mail info martin audio com MA200Q Amplifier
12. e operating conditions continue the Protect indicator s will illuminate indicating that the amplifier is about to go into thermal shutdown After five seconds the amplifier will go into thermal protect by muting the input signal After 15 20 seconds the amplifier will have cooled down enough for the amplifier to come out of shutdown and operate as normal If the load conditions remain unchanged the thermal protection will be re initiated Thermal protection occurs when the heatsink temperature reaches 90 C 9 3 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 panel 4 by the LED labelled Protect After five seconds the outputs will un mute and return to normal operation unless the output signal has remained unchanged in which case the VHF protection will re initiate 9 4 Short circuit protection All Martin Audio MA Series amplifiers are completely short circuit protected The protection circuit permits very high peak currents but still holds the output devices within the safe operating area If a short circuit is maintained the channel affected will eventually go into a thermal protect cycle until the short circuit has been removed 9 5 AC mains voltage protection If the AC mains voltage is outside the operational window over or under voltage the power supply will automatically shut down When
13. ection is not activated 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 there is no short circuit present at the amplifier s output e g any component in the loudspeaker this can occur when the loudspeaker coil gets hot Fault The amplifier goes into protection with power indicators off Check that the AC mains voltage is within the amplifier s operating range 130 265V 230V and 65 135V 115V Over under voltage protection may have occurred If the amplifier is connected by mistake to a 3 phase supply an internal non resetable fuse or resistor may have blown The amplifier then has to be returned to your supplier for service Fault The amplifier does not respond even after checking above items In the unlikely event of on a non user rectifiable fault return the amplifier to your supplier or an approved service centre Martin Audio cannot be held responsible for damage or injury as a result of the top cover being removed 16 Martin Audio MA200Q Amplifier HSITINED 11 WARRANTY General The MA200Q Power amplifier is warranted to be free from defects in components and factory workmanship under normal use and service for a period of three 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
14. gn the power distribution for at least the required current at 1 8 power or 1 3 power for heavy duty demands such as concert touring and Industrial music etc The heat power can be calculated as following If a headroom figure of at least 5dB 1 3 full power is used with a 4 ohms load on all four channels of the amplifier The 1 3 power per channel is then 200 3 67 watts and total output power is 4 x 67 267 watts The mains power consumption from the chart above is 720 watts The heat power produced is the difference between the power consumption and output power 720 267 453 watts total for the amplifier MA200Q 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 307 235 260 200 1050 800 4 Ohm 453 370 390 320 1550 1260 2 Ohm 705 605 610 520 2410 2060 1 3 Power level Average power with music as programme material continuous clipping 1 8 Power level Normal operating power with music as programme material occasional clipping 7 CONNECTIONS 7 1 Input connections 7 41 4 Balanced inputs The Input connectors are Neutrik combo jacks and incorporate an XLR and _ 6 3mm jack They are active balanced and wired as below PIN 1 GROUND SHIELD PIN 2 HOT PIN3 COLD Gnd 11 Martin Audio MA200Q Amplifier HSITINED The Neutrik Combo jack is wired in parallel with the XLR TIP HOT
15. he number of output channels from four to two The nominal impedance of the load must be more than 3 ohms To bridge channels A and B set the A B link bridge switch to IN and use either input connector A or B Both the A and B 1 level attenuators must be in the same position we recommend they are g O used in the OdB fully clockwise position The loudspeaker load will now be V2 QQ iL Vv Q connected to 1 and 2 on the OUTPUT A B connector 1 should be connected to the positive terminal of the loudspeaker and 2 to the 27 negative terminal of the loudspeaker Channels C and D are bridged in the same way using the C D link bride switch the output appearing on the OUTPUT C D connector pins 1 and 2 5 4 5 Bridge mono mode features Lo 1 5 e r gt EAN at eA can TS X 2 H i B C_ INPUT aala LINK SWITCH Y 49 s LS gt fa S fa aly ch e 20 CH 3 F eer A C D INPUT e LINK SWITCH 8 Martin Audio MA200Q Amplifier HSITINED Bridged mono mode combines the power of two channels into one loudspeaker This results in twice the voltage swing four times the peak power and just less than three times the full power of a single channel This is because the coil is
16. ition so that the loudspeaker load will be shared equally between the channels 8 4 Indicators N41 l protect protect a ea 7 mammae CLIP ar LONDON ie 40dB 400B O a ON CHA CHB CH C CHD 1210 7 12310 7 12410 7 12310 7 1 5 1 5 1 5 4 5 2 3 3 3 3 4 Ao 1 4 1o 1 si Bo a B 0 i dB 0 kz dB 0 The yellow LED s on the front panel indicate if any protection circuits are activated These are described on page 14 The Clip limit LED s indicates when the amplifier output is clipping or limiting It has two different indication states e When the clip limiter is engaged it has a short time constant and illuminates briefly e When the clip limiter is not engaged it has an increased time constant and illuminates for a longer period The 40dB LED s illuminate when the output signal is greater than 40dB with OdB referenced to full output power These LED s also act as signal present indicators The four bottom green ON LED s indicate when the power supply is operating normaly and the output circuits are receiving the correct rail voltage 9 PROTECTION FEATURES Each Martin Audio MA series amplifier has many advanced protection features that will protect both the amplifier and the loudspeakers connected to it should a fault condition arise Under normal use these features are inaudible All protection circuits
17. m entering the amplifier The grille is removable for easy cleaning of the filter by simply pulling them off The foam filter should always be used 8 Carry protection handle Both handles can be used to carry the amplifier they also act as protection for the front panel In fixed installations or where rack front covers are too shallow they may be removed by unscrewing the retaining bolts behind the front panel 4 3 Rear Panel 1 3 a ay 4 ay sy 1 Limiter m E detse i aa da g 77 FANN CO WE SY goe Miet Pee C EG wa Ga gt ARTIN AUDIO MA200Q fist ccouy Gouin Ser bss a 3y TS IKE OT 3 lt 7 Koy ho amp 1 Output Speaker connector The Neutrik Speakon connector is used on the outputs of the amplifier a full description can be found in the operation section See page12 5 Martin Audio MA200Q Amplifier i E a j 3 Clip limiter switch Turns the clip limiter ON switch IN position or OFF switch OUT position See page13 HSITINE 4 Input signal XLR The Neutrik Combo jack is used which also features a _ TRS phone jacks Pin 2 is hot see page10 5 Link switch Allows a single input to drive channels B and C simultaneously 7 Link bridge switch Allows a single input to drive channels A and B and or channels C and D simultaneously Also used for bridged operation of channel pairs See page 6 9 AC
18. n of the nearest dealer or distributor Telephone 44 0 1494 535312 Fax 44 0 1494 438669 E mail info martin audio com www martin audio com 17 Martin Audio MA200Q Amplifier HSITINED 12 SPECIFICATIONS MA200Q T T MAXIMUM OUTPUT POWER EIA 1kHz 1 thd FTC 20 20kHz 0 1 thd 8Q per Channel 130W 120W 4Q per Channel 200W 180W 2Q per Channel 270W 245W 89 Bridged 400W 360W 4Q Bridged 540W 490W MAXIMUM OUTPUT VOLTAGE 8Q load 32Vrms Peak voltage no load 51Vrms POWER REQUIREMENTS 230V version 115V version Operating voltage 130 265 Vac 65 135Vac Minimum start up voltage 180Vac 90Vac Peak inrush current 10A 20A MAINS CURRENT DRAW 4 Ohms 230V version 115V version Quiescent current no load 0 6Arms 1 2Arms 1 8 Full power both channels driven 2 9Arms 6Arms 1 3 4 Full power both channels driven 4 5Arms 9Arms Full power 1Khz 1 thd 7 9Arms 16Arms DISTORTION THD 20Hz 20KHz 1W to full power 0 05 THD 1KHz 1B below clip 0 01 DIM 30 3cB below clip 0 008 HUM NOISE lt 105dB CHANNEL SEPERATION 70dB OUTPUT IMPEDANCE 30mQ SLEW RATE 30VuS INPUTS Fixed gain dB 32 Input Vrms Ref 4Q for full power 4 x Single Channel 0 71 Impedance 20KQ Differential 10KQ Single ended c m r r 50dB DIMENSIONS W 483mm x H 88mm x D 325mm W 19ins x H 3 5ins x D 12 8ins 18 Martin Audio MA200Q Amplifier WEIGHT SHIPPING DIMENSIONS SHIP
19. operate independently 9 1 Output Limiter An output limiter is included to avoid amplifier clipping When an amplifier is severely overdriven its output waveform is clipped its peaks are squared off reducing the crest factor In extreme cases the waveform can approach that of a square wave An amplifier is normally capable of producing far more power under these conditions than its normal undistorted rated output power The limiter works by monitoring the output and comparing the distortion produced between the input and output of the amplifier If the distortion exceeds 1 THD for any reason voltage or current clipping the 14 Martin Audio MA200Q Amplifier HSITINED limiter reduces the input signal proportionally Note that if the signal is distorted or clipped before it reaches the amplifier the clip limiter will not be activated Under normal operation the clip limiter is inaudible The limiter can be turned On or Off by pressing the relevant clip limit switch 3 see page 5 Some manufacturers of loudspeaker processors do not recommend the use of clip limiters in amplifiers as it can effect the tracking of the processor s limiters If the amplifier is being used without any external limiting Martin Audio recommend leaving the clip limiters switched ON button depressed 9 2 Thermal protection When the amplifier is driven very hard into a low impedance load the cooling fans will run at high speed If thes
20. operational HSITINED 6 4 Grounding There is no ground lift switch or terminal on this amplifier The signal ground is always floating lifted with respect to chassis ground via a ground lift resistor If a potential difference above 0 6V is detected between signal ground and chassis earth a short circuit is automatically introduced between the two ensuring electrical protection If other equipment or amplifiers within a system should develop an electrical fault to earth the mains fuse on that equipment should rupture due to this automatic system allowing an earth current to flow for protection purposes lf however you wish to permanently connect the signal ground to chassis earth connect the XLR connector s shell lug to pin 1 In the interest of safety never disconnect the earth pin on the mains cable To comply with CE approval radio interference there is an AC mains filter This filter needs the chassis ground for reference otherwise a current loop is formed via the signal ground Never disconnect lift the mains safety earth 6 5 Power consumption There are three ways to determine the power current consumption of the amplifier First the peak current draw at full power output Under this condition the amplifier will operate for less than 2 minutes before thermally limiting or blowing the mains fuse and is an unrealistic normal use condition To design a mains distribution system based on the current draw at full power wo
21. output voltages To avoid the risk of electric 4 shock do not touch any exposed loudspeaker wiring when the amplifier is operating See page 12 Connecting loudspeakers 3 Martin Audio MA200Q Amplifier HSITINED 3 5 3 Radio interference A sample of this product has been tested and complies with the limits for the European Electro Magnetic Compatibility EMC directive These limits are designed to provide reasonable protection against harmful interference from electrical equipment This product uses radio frequency energy and if not used or installed in accordance with these operating instructions may cause interference to other equipment such as radio receivers Compliance with the EMC directive does not automatically guarantee non disturbance of susceptible equipment in close proximity to this amplifier If this amplifier is suspected of causing interference this can be easily checked by powering the amplifier on and off and observing the disturbance The user can correct the interference by one or more of the following measures e Re orientate or relocate the receiver s antenna e Increase the distance between the amplifier and the effected equipment e Connect the mains cable to a socket on a different circuit from that to which the affected unit is connected e Check if the affected equipment complies with the EMC limits for immunity CE labelled If not address the problem with the manufacturer or supplier All electrical products
22. power supply regardless of whether the amplifier is turned on or off 15 Do not run the output of any amplifier back into another amplifier s input 16 Refer all servicing to qualified personnel only Servicing is required when the apparatus has been damaged in any way such as e Mains cable or plug is damaged Liquid has entered the amplifier An object has fallen into the amplifier The amplifier has been exposed to rain or moisture The amplifier does not operate normally e The amplifier has been dropped or the enclosure is damaged 17 Do not remove top or bottom covers Removal of the cover will expose hazardous voltages There are no user serviceable parts inside and removal may void the warranty 18 An experienced person should always supervise inexperienced adults or minors when using professional audio equipment 3 5 User responsibility 3 5 1 Loudspeaker damage Your amplifier is very powerful and can be potentially dangerous to both loudspeakers and humans I alike Many loudspeakers can be easily damaged or destroyed by overpowering especially with the high power available from a bridged amplifier Always check the loudspeaker s continuous and peak power capabilities Even when using the amplifier s front panel attenuator to reduce the gain it is still possible to reach full output power if the input signal level is high enough 3 5 2 Loudspeaker output hazard Power amplifiers are capable of producing hazardous
23. rear of the rack If the heatsink temperature rises too high it s sensing circuit will mute the hot channel If the power supply overheats another sensing circuit will mute all four output channels until they cool down to a safe operating temperature For installations with a central cooling system usually found in a dedicated rack room it may be necessary to calculate the maximum heat emission Refer to Power consumption on page 10 Remember Never rack different makes of amplifier together that have opposing air flow characteristics 6 3 Operating voltage WARNING A label just below the mains cable on the rear of the amplifier indicates the selected AC mains operating voltage Connect the mains cable only to the AC source referred to on the label The warranty will not cover damage caused by connecting to the wrong type of AC mains If the power plug is not appropriate for your country it can be cut off and re wired to a suitable connector in the following way BLACK or BROWN LIVE WHITE or BLUE NEUTRAL GREEN or GREEN YELLOW EARTH 9 Martin Audio MA200Q Amplifier HSITINED Once connected to a suitable AC supply the amplifier can be started with the power switch When you power up the amplifier it takes a couple of seconds to self check this is known as the soft start or slow start sequence the fans then blow at high speed before going into idle The four bottom green LED s then illuminate to show the amplifier is
24. s are wired Channels A B output connector Pin 1 Pin 1 Output A Pin 2 Pin 2 Output B Channels C D output connector Pin 1 Pin 1 Output C Pin 2 Pin 2 Output D 12 Martin Audio MA200Q Amplifier HSITINED When outputs A and B or C and D are bridged the loudspeaker is connected to 1 and 2 of the connector see diagram below Looking at the rear of the amplifier the right hand Speakon has both channel A and B outputs the left hand Speakon channels C and D This configuration is useful for bridging and bi amp operation see bridged mono operation on page i Bridged mono G9 Channel A and B or C and D into one Speakon Quad or Bi amp Never connect either output terminal to ground or to some other output or input terminal see warnings in chapter 1 For normal four channel operation connect each loudspeaker load across the output s positive and negative terminals Pay attention to loudspeaker polarity loudspeakers connected out of polarity degrade sound quality Keep the loudspeaker cables as short as possible and use good quality stranded cable Do not use shielded wire such as microphone or guitar cable Remember that the speaker cable reduces the power of the amplifier in two ways It increases the load impedance and introduces resistive power losses 4 WARNING To prevent electric shock do not operate the amplifier with any of the
25. tes 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 arrangements after which point the amplifier will mute the input signal When the cooling fans have returned the output heat sinks back to the normal operating temperature the input signal is un muted This indicator also illuminates when signals above 12 kHz at full power are detected at the output terminals or if the short circuit protection is activated Should this occur the input signal is muted and the process repeats until the VHF signal is no longer present or the short circuit is removed See page 15 HSITINED 3 Clip limit indicator This indicator signals when the amplifier output is clipping or limiting It has two different indication states When the clip limiter is engaged it has a short time constant and it illuminates briefly See page 15 When the clip limiter is not engaged it has an increased time constant and it illuminates for a longer period 4 Signal present indicator This LED Illuminates at 40dB below full output signal 5 On indicator The four bottom green ON LED s indicate that the output circuits are receiving the correct rail voltage 6 Power switch Turns the mains power ON or OFF See page 9 and12 7 Fan grille filters A grille with foam filters is located on the front panel to prevent dust fro
26. the mains voltage is above the minimum start voltage and below its maximum operating voltage the amplifier will restart The four green ON LED s indicate when the power supply is operating correctly 9 6 DC protection There are two types of DC protection e Fuses on the supply branches of each channel e DC crowbar protection that shorts the output if more than 10 volts DC is being detected on the outputs Both these circuits come into effect once a DC level is detected on either channel 15 Martin Audio MA200Q Amplifier HSITINED 10 MAINTENANCE Under normal use the amplifier should provide years of trouble free service The only maintenance required by the user is to clean the front grille periodically In some extreme cases it may be necessary for authorized service personnel to clean the inside of the amplifier These conditions usually occur after prolonged use e g in environments using cracked oil smoke machines If you are using your amplifier for heavy duty use i e concert touring or industrial music it is recommended that you have your amplifier serviced every 3 years purely as a preventative measure 10 1 Troubleshooting These are typical things to check if you think your amplifier is faulty Fault No output If the Signal Present 40dB is illuminating a signal is entering the amplifier and the likely cause is an unsecured Speakon loudspeaker connector or loose termination Check also that the VHF prot
27. uctions 7 Do not operate the amplifier on or near any source of heat such as radiators lighting dimmer racks or other apparatus that produces 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 9 6 3 for wiring colour code 2 Martin Audio MA200Q Amplifier HSITINED 9 Connect only to AC power outlets rated 230 240V or 100 120V 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 12 The amplifier is intended to use in a 19 rack Follow the mounting instructions When racks with wheels are used use caution to avoid injury from tipping when in motion 13 Unplug this apparatus during lightning storms or when unused for long periods of time 14 Do not connect an amplifier output in parallel or series with any other amplifier s output Do not connect the amplifier output to any other voltage source such as a battery mains outlet or
28. uld result in an over specified system No music program material requires the full steady state continuous power of an amplifier this operating condition is only valid during 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 normal program music will be in a state of constant clip and is therefore the highest power level that can be achieved without completely obliterating the program material Lastly the normal operating power as defined by EN 60065 as a measurement level for approval and testing to this standard 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 program music can be re played without continuous amplifier clipping this corresponds to a headroom of only 9dB s which is very low for normal program material MAX OUTPUT POWER MAINS INPUT POWER Power 1 3 Power 1 8 Power Idle WW note 1 note 2 MA200Q _8 ohms 4x 130 4ohms ax 200 Zohms 4x 270 1065 note 1 Average power with music as program source The amplifer driven to clip level note 2 Normal music power with 9dB headroom IEC standard power rating 10 Martin Audio MA200Q Amplifier 6 5 1 Calculation The current draw can be calculated by dividing the mains input power by the mains voltage We recommend that you desi
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