Mach M20.02 Controller user manual
Contents
1. un NG iaa tents 100 120 220 240 VAC 50 60 Hz POWER CONSUMPTIONS ioed did cdd dydd ias 9 WATT FUSE Sd a O ad i hc O Ml cals do vy 100 mA MAINS CONNECTION cunoticias STANDARD IEC RECEPTACLE PHYSICAL DIMENSIONS HxWxD re 1 75 x 19 x 5 in 44 x 482 x 128 mm NET WEIGH IS id NT ddd eee A ates ET Gr Y eden toes 22kg SHIPPING WEIGHT Dn T ee bee LA A un 3 0 kg Specifications 12 M20 03 and MS 3 Specifications INPUT A RAN Differential IMPEDANCE I GG A EA Ad 47k Ohm OPERATING LEVEL aiii 0dB MAX MN PO a a dass 21 dBV 10 5 V SENSE INPUT TYPE dit Amp voltage MAX INPUT es und y corr CYW tilda dM 110V OUTPUT IMPEDANCO E si 50 Ohm MAXOUTPUdD tbi o ln DR WR ud du 20dBV PAND WV DTE GG ha 35 110 Hz 110 1200 Hz 1 2 120KHz HD a cutouts a uk ado Sn Gu GU NOS ERES AO 0 0015 SANG han Gy A e 112 dB CONTROLS OLEU iN an NO y Y dn NO 00 6dB DIP SWITCHES At il A eel ns a on tt Mesto hel seth A echoes Limit sense LOW Limit sense MID LLEEDBEUE od MAIN POWER POWER SUPPLY MAINS VOLTAGE cu 100 120 220 240 VAC 50 60 Hz POWER CONSUMPTION S eean du ie ed ido dd de add 9 WATT FUS Einne e A A TR DDW OR dg cea dy GT eens 100 mA MAINS CONNECTION ia E E n aae A E A Standard IEC receptacle PHYSICAL DIMENSIONS HxWxD era 1 75 x 19x 5 in 44 x 482 x 128 mm NET WEIGHT ista y a YN dd ge A i dyd gd ge bd Gu ne De 2 2 kg SHIPPING WEIGHT 2 GG Gu A2. Right Rear Panel MAIN VOLTAGE U Right channel U Left Channel E EO OOO OO LOW HI IN LOW HI IN 1 2 5 6 if 8 9 10 1 Mains voltage selector 2 Mains voltage connector Right Left 3 Right channel sense input brown HIGH green 4 Right low output green O O O brown 5 Right high output 6 Right input Right Left 7 Left channel sense input white blue LOW We pon 8 Left low output __white brown_ G wnite blue 9 Left high output 10 Left input M20 03 and MS 3 Controls Front Panel O ae LOW T HS MD T HIGH o eas 20 4 ves O 00 prr Cento 00 ee Cat Main iM hat M20 03 CONTROLLER PONER 2 3 4 5 6 7 1 1 Main power switch 2 Low output Left 3 Low output Right 4 Mid output Left 5 Mid output Right 6 High output Left 7 High output Right Rear Panel MAIN VOLTAGE U Fight channel U Left Channel LOW MD HI IN LOW MD HI IN 1 2 6 7 ti 10 11 12 1 Mains voltage selector 2 Mains voltage connector Right Left 3 Right channel sense input brown HIGH green 4 Right low output green O O S brown 5 Right mid output _ 6 Right high output Right Eat L white green MID white orange 7 Right input w dO white orange white green 8 Left channel sense input g y F q 9 Left low o
3. 1000 100110 M181T 000010 a M182i M182T 000010 2 2 z DIP switch settings M20 03 Audio Controller Operation MS 3 Limiter Selection 123 456 MS 3 DIP Switch Locations 0 OFF DIPs 1 and 4 DIPs 2 and 5 DIPs 3 and 6 1 ON 123456 123456 123456 MS 1262 000010 000100 MS 118 000010 DIP switch settings MS 3 Audio Controller M20 02 M20 03 and MS 3 section 6 SPECIFICATIONS M20 02 Specifications INPUT IP wd O WY CH UY yd Electronically balanced IMPEDANCE citane tinal than ek GG AE 47k Ohm OPERATING LEV ED outside dese beet 0 dB MAX INPUT ei AAG NU ID TG GON GG SI YI I 21 dB V 10 5V SENSE INPUT A SS Amp output sense MAX INPUT ette i Lin YN o byd de du bl Su do 110V OUTPUT IMPEDANCE te ua dn nA i Bl Od il ta sods An Mice edn NL ott coe 50 Ohm MAX OUTPUT Ei AA o 3 21dBV 10 5V BAND WUD THE ice ON y o 35 Hz 110 Hz 110 Hz 160 kHz E Up ID HY a HR Y Y RD Gn NE 0 0015 STAN Ft GY ti bon tat hs dotted dba had ed tel te la dd isos tbls hoc AOA 112 dB CONTROLS OUTPUT i ING GG GY FYN GY FYD ad E Sea 00 6dB DIP SWITCHES Limiter settings low Limiter settings high INDICATORS 4 LED GREEN SIGNAL SEND TO OUTPUT 4LED RED na LIMITERS IN FUNCTION T EEDIBEUER nuu aM E E A ON UD YR DYD MAIN POWER POWER SUPPLY MAINS VOLTAGE
4. MS 3 M20 02 M20 03 Audio Controller user manual M ach section 1 INTRODUCTION Safety Precautions Read this manual before operating the controller To avoid the risk of electrical shock do not remove any cover from the controller while it is connected to AC power Do not expose the controller to rain or moisture General precautions Do not operate the controller near heat sources such as radiators etcetera Connect only to a power supply as marked on the controller Do not drop the controller Do not spill liguids onto or into the controller Refer all service to a gualified technician Technical Background When working with loudspeakers there are 5 decisive factors for maximizing sound guality speaker lifetime excursion control input power control freguency segmentation controller generated distortion controller generated noise To avoid mechanical damage to the speaker units the excursion of the speaker cones must be controlled The M20 02 M20 03 and MS 3 accomplish this with a subsonic filter and limitation To avoid electrical damage to the speaker units the power sent to the voice coils must be controlled The M20 02 M20 03 and MS 3 use limiters for this purpose To get the best sound the speaker units must be driven within the proper freguency range This is accomplished by the cross over in the M20 02 M20 03 and MS 3 In addition the controller must not add distort
5. YW Y GN Y AGAU 3 0 kg M20 02 M20 03 and MS 3
6. ally filtered with a 24dB Butterworth high pass filter Thereafter the signal is fil tered to its crossover point with a 24dB Linkwitz Riley low pass filter The signal then passes through the limitation section to the electronically servo balanced output stage High pass section The signal is first filtered to its crossover point with a 24dB Linkwitz Riley high pass filter The signal then passes through the limitation section to the electronically servo balanced output stage The sense input on the controller measures the amplifier output directly If the signal is too high compared to the settings of the internal DIP switches the signal to the amplifier will be reduced M20 02 M20 03 and MS 3 Design Concept M20 03 and MS 3 Block Diagram SENSE LOW pane a vo De lle OUTPUT DIFF INPUT SENSE MED ge gt i VO DIFF OUTPUT e hal q U E SENSE HIGH SENSE HIGH y amp De er OUTPUT Input stage The input signal first passes through an electronically balanced input stage and is then simultaneously directed to the low pass LP mid pass MP and high pass HP section Low pass section The signal is first subsonically filtered with a 24dB Butterworth high pass filter Thereafter the signal is fil tered to its crossover point with a 24dB Linkwitz Riley low pass filter The signal then passes through the limit
7. ation section to the electronically servo balanced output stage Mid pass section The signal is subsonically filtered with a 24dB Linkwitz Riley high pass filter at the right crossover point between the low and mid section Thereafter the signal is filtered to its crossover point between the mid and high section with a 24dB Linkwitz Riley low pass filter The signal then passes through the limitation section to the electronically servo bal anced output stage High pass section The signal is first filtered to its crossover point with a 24dB Linkwitz Riley high pass filter The signal then passes through the limitation section to the electronically servo balanced output stage The sense input on the controller measures the amplifier output directly If the signal is too high compared to the settings of the internal DIP switches the signal to the amplifier will be reduced M20 02 M20 03 and MS 3 section 3 INSTALLATION Mounting The M20 02 M20 03 and MS 3 fit in a standard 19 by 1 75 inch rack unit Connectors The input and output are fully balanced but can be operated in unbalanced mode without problems The plugs are standard 3 pin XLR connectors wired pin 1 shield pin 2 and pin 3 Voltage Switch The voltage switch is found on the back of the controller Be sure to select the voltage that matches your AC supply before connecting and operating the controller Mains Connection By using a standard IEC receptacle a
8. ion to the system To get the best signal to noise ratio the noise floor of the controller must be below the general noise This is achieved by sur face mounted device SMD technology on double sided printed circuit boards M20 02 M20 03 and MS 3 section 2 M20 02 M20 03 AND MS 3 DESIGN CONCEPT The subsonic filter is a 24dB Butterworth for maximum sound guality and security The crossover filter configuration is a 24dB Linkwitz Riley to get the best electronic summation of the crossover points and to optimize amplifier power The feedback sense is electronically isolated from the controller signal to get the lowest noise and highest security for the amplifier The inputs and outputs are built as electronically servo balanced transformers The components used in the controller are selected for audio guality reliability minimum distortion and noise In addition the 20 03 includes an adjustable high pass egualizer to pre egualize the loudspeaker horns for correct freguency response M20 02 Block Diagram SENSE LOW pees y vo gt 169 OUTPUT DIFF INPUT rete SENSE HIGH y vo T gt ET OUTPUT Input stage The input signal first passes through an electronically balanced input stage and is then simultaneously directed to the low pass LP and high pass HP section Low pass section The signal is first subsonic
9. nd mains cable all of the international safety reguirements are met Speaker sense cable connection Two types of wire sets are used Type 1 wire sets single color wires only The colors are blue green black white brown yel low red and orange Type 2 wire sets have 4 single color wires brown green blue and orange and 4 two color wires white brown white blue white orange and white green Connect the left and right channel speaker sense input cables as described for your type of wire set Note The signal polarity each cable pair does not matter Type 1 wire sets The RED and ORANGE wires are not used Connect the BLUE and GREEN wires from the right channel sense input cable to the positive and negative terminals of the amplifier s right channel LOW FREOUENCY speaker output Connect the BLACK and WHITE wires from the right channel sense input cable to the positive and negative terminals of the amplifier s right channel MID FREOUENCY speaker output M20 03 and MS 3 only Connect the BROWN and YELLOW wires from the right channel sense input cable to the positive and negative terminals of the amplifier s right channel HIGH FREOUENCY speaker output Similarly connect the wires from the left channel speaker sense input cable to the amplifier s left channel outputs Type 2 wire sets The BLUE and ORANGE wires are not used Connect the WHITE BROWN and WHITE BLUE wires from the right channel sense inpu
10. t cable to the positive and negative terminals of the amplifier s right channel LOW FREOUENCY speaker output Connect the WHITE ORANGE and WHITE GREEN wires from the right channel sense input cable to the positive and negative terminals of the amplifier s right channel MID FREQUENCY speaker output M20 03 and MS 3 only Connect the BROWN and GREEN wires from the right channel sense input cable to the positive and negative terminals of the amplifier s right channel HIGH FREOUENCY speaker output Similarly connect the wires from the left channel speaker sense input cable to the amplifier s left channel outputs Fuse Replacement If the fuse blows something is wrong Be sure to fix the problem before replacing the fuse Also be sure that the replacement fuse is of the correct rating and type Limiter Settings The limiter is set from DIP switches inside the cabinet Before opening the cabinet be sure that the main power cable is dis connected The settings for Mach speakers are shown in section 5 Installation section 4 CONTROLS M20 02 Controls Front Panel M20 02 M20 03 and MS 3 O oe LOW aig P HIGH o 9 0 O O Os nto 00 err at M20 02 PONER 2 3 4 5 1 1 Main power switch 2 Low output Left 3 Low output Right 4 High output Left 5 High output
11. utput Right Left 10 Left mid output ___white blue LOW white brown 11 Left high output ___white brown t C white blue 12 Leftinput o Controls section 5 OPERATION M20 02 Limiter Selection To access the DIP switches remove the top plate The DIP switches are positioned as shown Uu UU E DIP Switch Locations O OFF DIPs 1 and 3 DIPs 2 and 4 1 ON 123456 123456 M12T 010010 M15T 001000 M30T 001000 M72i 111000 M82i 100000 M125i 011000 M127i 010100 M129i 010000 M154i 001000 M156i 001000 M151i 011000 M152i 011000 M181T 000010 M182i M182T 000010 DIP switch settings M20 02 Audio Controller M20 02 M20 03 and MS 3 M20 03 Limiter amp Egualization Selection DIP switches 1 6 set the limiter levels for each output channel DIP switches 7 and 8 set the egualization level 123 456 M20 03 DIP Switch Locations 0 OFF DIPs 1 and 4 DIPs 2 and 5 DIPs 3 and 6 DIPs 7 and 8 1 ON 123456 123456 123456 123456 M12T 010000 111000 z M15T 001000 111000 M30T 001000 111000 M127i 011000 111111 100010 M129i 011000 111000 110010 M151i 011000 a z M152i 011000 M154i 001010 111100 111100 M156i 001010 11
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