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Technical notes

7.1

Block diagram

The illustrations below show the output stage block diagram and the power supply block diagram.

Содержание MA12K

Страница 1: ...The Martin Experience MA12K MA12K DSP User Guide All material 2010 Martin Audio Ltd Subject to change without notice...

Страница 2: ...2 3 1 Output attenuation 14 2 3 2 Gain Sensitivity 15 2 3 3 Input select 15 2 3 4 Max output voltage 15 2 3 6 Clip limiter CH1 CH2 15 2 3 7 Gate CH1 CH2 16 2 3 8 KETH 16 2 3 10 Bar meters 16 2 3 11 O...

Страница 3: ...5 Channel delay 27 3 10 3 6 Gain 28 3 10 3 7 Peak Limiter 28 3 10 3 9 Advanced 29 3 10 3 9 1 Damping Control 29 3 10 3 9 2 Filters Definition 30 3 10 4 Channel Settings Copy 30 3 11 How to Setup a cro...

Страница 4: ...t Body Directive 89 336 EEC EMC pursuant to the product family standard for audio professional use EN 55103 1 and EN 55103 2 standard EN61000 3 2 EN 61000 3 3 In a domestic environment this product ma...

Страница 5: ...rsonnel The constructor cannot be considered responsible for eventual damages caused to persons things or data for the missing of accurate earth link Before powering this device verify that the amplif...

Страница 6: ...more headroom cleaner sound rather than for increased volume Speaker output shock hazard A Martin Audio amplifier is capable of producing hazardous output voltages To avoid electrical shock do not to...

Страница 7: ...dwidth and dumping factor Totally Digital with High Reliability The MA12K 12K DSP series is based on PWM technology that has been used for 30 years or more in power supplies and inverters PWM provides...

Страница 8: ...e provided Rear support mounting holes are also provided These should always we used to support the weight of the amplifier at the rear in a 19 rack Your MA12K 12K DSP amplifiers uses a forced air coo...

Страница 9: ...overed by the warranty Make sure the power switch is off before making any input or output connections It is always a good idea to have the gain controls muted during power up to prevent speaker damag...

Страница 10: ...e of the amplifier The figure below shows the connection of analog input for balanced and unbalanced line You can use either configuration but you must consider that unbalanced long lines can introduc...

Страница 11: ...f Speakon connector are paralleled internally and have to be considered as the positive output of the channel likewise the 1 and 2 pins of Speakon connector are also paralleled internally and should b...

Страница 12: ...plifier via the RS485 interface the illustration shows the wiring configuration for the connection of the data cable to the RJ45 socket located on the rear panel of the amplifier The same picture show...

Страница 13: ...2K 12K DSP Amplifiers The front panel controls in conjunction with the graphic LCD display above the buttons give the user the total control and detailed information about the status of the amplifier...

Страница 14: ...llow LED will light at 2 dBu If the level of the audio signal reaches the channel maximum output capability the red LED will be triggered The LED bars also have diagnostic function a flashing yellow L...

Страница 15: ...the Output attenuation screen You can choose to set CH1 CH2 or both by pushing the C1 2 button The and buttons change the value of the output attenuation in the range from 0 to 30dB Note for the best...

Страница 16: ...and down buttons change the selection the sel button locks the selected option 2 3 4 Max output voltage The illustration below shows the Max output voltage screen You can choose to set CH1 CH2 or both...

Страница 17: ...g table You can enable disable the gate by pushing the on off button Gating the output is delayed by 5 seconds after input signal removal and follows in reversed way the bottom green LED on the CH1 CH...

Страница 18: ...ing shown in bridge mode 2 3 12 Temperature In the Temperature screen you can view the historic temperature diagram of the last four hours of the final current use in the range from 10 to 90 C in the...

Страница 19: ...upply are correct IGBTCONV if OK is displayed the DC DC converter monitor function properly 192KHZ if OK is displayed the frequency system clock is correct 2 3 16 The Smartcard function The Smartcard...

Страница 20: ...ast of the LCD display by pushing the buttons 2 3 18 Set unlock code In this screen you can insert the numeric key to unlock the settings The same screen appears when the unlock button in the main scr...

Страница 21: ...lection can be used to switch from analog input to digital AES3 input with or without DSP processing The idle mode function is a power saving feature When activated the output stage switches off if th...

Страница 22: ...ns will be shown empty You can enter the preset name by pressing ok The selected character is arrowed and is modified by pressing or keys The next character is selected by pressing sel key Finish the...

Страница 23: ...amplifier and used as starting point for a new preset saving operation The menu will ask if you want to keep edit that name or if you would like to edit the name of the preset that is going to be over...

Страница 24: ...er local memory or smartcard Local presets can be made Read Only by enabling the Lock presets function in order to preserve the original settings stored on the amplifier The lock code when set differe...

Страница 25: ...ach with 8 different filter shapes peaking hi lo shelving hi lo pass EQ band pass band stop all pass alignment delay with high temporal resolution crossover with IIR Butterworth Bessel and Linkwitz Ri...

Страница 26: ...eaker systems The delay ranges from 0 to 2000 ms in 1 ms increments 3 10 2 3 AES3 This menu controls the AES3 input options 3 10 2 3 1 Gain trim This menu sets the gain to be applied at the signal com...

Страница 27: ...CH1 CH2 CH1 2 Settings The channel or the channels that are being edited are shown on the top right corner in these sub menus CH1 CH2 or 1 2 when you are editing both channels at once 3 10 3 1 EQ Thi...

Страница 28: ...octave 1st order filter to 48dB octave 8th order filter The FIR filters can be selected as normal FIR or enhanced FIR The enhanced version gives a higher out of band rejection at the expense of a litt...

Страница 29: ...decay time When editing the threshold the display shows in real time the gain reduction due to the limiting function GR dB together with the limiting voltage referred to the input The limiter has a lo...

Страница 30: ...xx x dB and the power really delivered to the load Pavg xxxxW Power Limiter DRIVER POWER THRESHOLD ATTACK TIME DECAY TIME 1 VC tweeter 10 20 W 100 ms 300 ms 1 5 VC tweeter 20 30 W 150 ms 300 ms 2 VC h...

Страница 31: ...to avoid an over damped response This setting will be linkable to the actual average level automatised in the next firmware release Average power rated power Power compression Equivalent series resis...

Страница 32: ...artin Audio Ltd Subject to change without notice 31 Set Frequency 2000 Hz Set Shape Linkwitz Riley You could also experiment with shape FIR Set Slope 24dB oct Edit CH2 Go to HP Filter set Active ON Se...

Страница 33: ...s at once Remember that in bridged mode the 2 DSP channels should be identical to get the right results 3 2 MA Control Manager Overview Both the standard and DSP versions of the MA12K may be remote co...

Страница 34: ...a glance overview of the entire system Amplifier Settings Window Each amplifier can be opened and all parameters adjusted on line in real time making a complex system very straightforward to set up c...

Страница 35: ...ion with unparalleled ease A scheduler is available to switch amplifiers on or off at a specified time either daily or weekly A record of amplifier performance including temperature can be accessed an...

Страница 36: ...MA12K 12K DSP amplifiers use a continuously variable speed fan to assist cooling the fan speed changes in response to the amplifier s cooling needs If the heat sink temperature reaches approximately...

Страница 37: ...12K DSP amplifier Refer servicing to qualified technical personnel If your MA12K 12K DSP amplifier needs repair contact your Martin Audio dealer or distributor 5 3 Dust removal Particularly in dusty...

Страница 38: ...ided that the product is returned in its original packaging shipping prepaid to an authorised Martin Audio service agent or distributor Martin Audio Ltd cannot be held responsible for defects caused b...

Страница 39: ...ll material 2010 Martin Audio Ltd Subject to change without notice 38 7 Technical notes 7 1 Block diagram The illustrations below show the output stage block diagram and the power supply block diagram...

Страница 40: ...000 4 stereo 2 x 4000 6 1 12 2 1000 1250 410 1244 314 8 bridged 1 x 8000 2 stereo 2 x 6000 8 8 17 6 1500 1875 535 1668 421 4 bridged 1 x 12000 Pink Noise 1 4 rated power 8 Stereo 2 x 2000 5 9 11 9 100...

Страница 41: ...cally 0 05 Intermodulation SMPTE Max 0 5 from 1W to full power typically 0 05 Intermodulation DIM 30 Max 0 5 from 1W to full power typically 0 05 Inputs Balanced to ground XLR female combo jack Impeda...

Страница 42: ...All material 2010 Martin Audio Ltd Subject to change without notice 41 7 4 Technical Drawing...

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