OPERATING INSTRUCTIONS INDUSTRIAL SERIES
Contents
1. Line Inputs From Mixer EQ Etc MM 4CEU SpeakerSense Line Outputs NOTE Amplifiers 1 and 2 are the alicia amplifiers with the highest gain a cht Channel 2 SpeakerSense Channel 1 SpeakerSense Channel 2 Input Amplifier 1 o eje Channel1 Q Input EE Channel 1 Output MM 4 loudspeakers Channel 2 Output d Channel 2 Input Amplifier 2 g statafatafate d Channel1 Q Input Channel 1 Output Channel 2 Output Channel 2 Input Amplifier 3 Channel 1 Input Channel 1 Output Channel 2 Output Channel 2 Input Amplifier 4 Channel1 Q Input Channel 1 Output MM 4 loudspeakers Channel 2 Output Figure 2 2 Connecting the MM 4CEU Control Electronics Unit 8 CHAPTER 3 CHAPTER 3 CHOOSING A POWER AMPLIFIER The MM 4 is designed for high quality distributed sound systems To realize the MM 4 s full capabilities a direct drive power amplifier capable of 49 volts rms 70 volts peak at the rated load impedance presented2. Use standard audio cables with XLR connectors for driving balanced signal inputs Telescopic grounding pin 1 disconnected on one end is not recommended Each MM 4CEU output can drive multiple power amplifier signal inputs in parallel to a minimum load impedance of 600 ohms Refer to your power amplifier specifications to determine input impedance and calculate the net impedance of multiple paralleled amplifier inputs For example one channel of a MM 4CEU could drive 20 amplifier channels with 12 kOhms input impedance 600 ohms total impedance SPEAKERSENSE INPUTS For each MM 4CEU channel connect a cable from the amplifier output to the corresponding SpeakerSense input If you are driving multiple amplifier channels from a single MM 4CEU output and using MultiSense connect the two amplifier output channels with the highest gain not to exceed 30 dB of amplification gain to a separate corresponding SpeakerSense input d CAUTION When using MultiSense make sure the two amplifier channels with the highest gains are the ones connected to each of the MM 4CEU s two SpeakerSense inputs d CAUTION When using MultiSense both amplifier outputs MUST be connected with the same polarity Observe the polarity labels on the MM 4CEU rear panel MM 4CEU MM 4 CONNECTION DIAGRAM Figure 2 2 on the following page illustrates a typical MM 4CEU connection using four 2 channel amplifiers and 32 MM 4 loudspeakers CHAPTER 2
3. Berkeley CA 94702 techsupport meyersound com All Rights Reserved USA www meyersound com 05 091 012 01 Rev D
4. Step 2 Strip cable as shown and solder conductors to pins NOTE Pin 1 is negative and pin 2 is positive Cord Connector Cord Connector Tab g Tab Coupling Ring Side notch Step 3 Align coupling ring tabs with cord connector s side notches and push the coupling ring onto cord connector Clamp Step 4 Clamp Lock Push the cable clamp housing foward until it locks into the connector body and snap the two clamps into their compartments Step 5 es Push the boot all the way foward to seat tightly onto the cable clamp housing 13 APPENDIX B APPENDIX B MM 4 Specifications Acoustical Note To realize the MM 4 s full capabilities an MM 4CEU is required The amplifier driving the loudspeakers should be capable of 49 volts RMS at the rated load impedance and provide a voltage gain between 10 and 30 dB 20 dB for optimal S N ratio and protection The power rating of the amplifier should be as follows 1 MM 4 ch 16 Q 150 W 2 MM 4 ch 8 9 300 W 4 MM 4 ch 4 Q 600 W 8 MM 4 ch 2 Q 1200 W Operating frequency range Frequency response Phase response Maximum peak SPL Maximum continouos SPL Horizontal coverage Vertical coverage 120 Hz 18 kHz Note Recommended maximum operating frequency range Response depends on loading conditions and room acoustics 160 Hz 16 kHz 4 dB Note Free field measured with one third octave frequency resolution at 4 m
5. THE MM 4 MINIATURE WIDE RANGE LOUDSPEAKER The MM 4 Miniature Wide Range loudspeaker Figure i 1 is a very compact loudspeaker for high quality distributed system applications In contrast to conventional low power 70 volt transformer based systems the MM 4 can produce wide range high sound pressure levels while dramatically reducing distortion and easing installation requirements Figure i 1 MM 4 Miniature Wide Range Loudspeaker Peak Limit Y M a YIS Powe o RMS Limit Sense MM 4 Controller The MM 4 consists of a single 4 inch cone driver with a 16 ohm voice coil mounted in a sealed enclosure Connecting directly to your amplifier the MM 4 draws 150 watts peak from the line to produce 112 5 dB peak SPL Typically with four MM 4 loudspeakers connected in parallel on the line the system requires a direct drive power amplifier capable of 600 watts continuous output 49 volts rms into 4 ohms The MM 4 s enclosure comes standard with a paintable black anodized finish The enclosure acts as a sink to dissipate heat from the driver voice coil and is fitted with a perforated steel grille NOTE The MM 4 can be ordered custom painted in any color to match your d cor A looping sealed EN3 connector is available for outdoor installations as well as a Phoenix style keyed connector for indoor systems THE MM 4CEU CONTROL ELECTRONICS UNIT A two channel single rack unit the MM 4CEU Control Electronics Unit F
6. heat damaged in any way such as the power supply cord or plug is damagea liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped 9 Do not defeat the safety purpose of the grounding type plug A grounding type plug has two blades and a third grounding prong The third prong is provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus The AC mains plug or appliance coupler shall remain readily accessible for operation SAFETY SUMMARY English To reduce the risk of electric shock disconnect the unit from the AC mains before installing audio cable Recomnect the power cord only after making all signal connections Connect the unit to a two pole three wire grounding mains receptacle The receptacle must be connected to a fuse or circuit breaker Connection to any other type of receptacle poses a shock hazard and may violate local electrical codes Do not allow water or any foreign object to get inside the unit Do not put objects containing liquid on or near the unit To reduce the risk of overheating the unit avoid exposing it to direct sunlight Do not install the unit
7. MFMA MM4 Flush Mount Adapter allows the MM 4 to be used with virtually any ceiling or in wall flush mount bezel designed to house an 8 inch cone loudspeaker The kit includes two L brackets that fit the bezel s stud pattern a grille mask and associated hardware Figure 1 2 Figure 1 2 Installing the MM 4 into the optional MFMA MM4 Flush Mount Adapter To install the MM 4 into the MFMA MM4 Flush Mount Adapter 1 Gently slide the loudspeaker into the adapter s housing seating its sides against the attached neoprene strips 2 Line up the threaded inserts on the loudspeaker with the long guide hole on the housing 3 Fasten adapter to loudspeaker using two 1 2 x 3 8 16 machine screws ensuring that the 1 rubber washers touch the adapter housing and the 1 metal washers support the machine screws 4 Tighten the machine screws to secure the loudspeaker to the adapter Do not over tighten LOUDSPEAKER CONNECTIONS To realize the full capabilities of the MM 4 each loudspeaker must be fed with voltage swings up to 49 volts rms 70 volts peak from the amplifier driving the line with all loudspeakers in the line connected in parallel In distributed systems a line with four to eight loudspeakers connected in parallel is typically driven with one amplifier channel CHAPTER 1 CAUTION The total load of the MM 4 loudspeakers connected in parallel should not be lower than the minimum allowable load of the ampli
8. Peak Limit LED glows yellow m RMS Limit During RMS limiting the RMS Limit LED glows yellow E Sense When sensing the MM 4CEU may display one of two LED colors When the signal is sensed back through the SpeakerSense connection the LED glows green When the gain of the amplifier is below 10 dB or above 30 dB the LED flashes red indicating that the protection will not work properly When a channel returns to normal limiting ceases The LED for that channel is inactive indicating MM 4CEU is not currently limiting CHAPTER 2 AC POWER The MM 4CEU accommodates international power standards in two ranges 90 to 130 V AC and 180 to 260 V AC 50 60 Hz A rear panel switch selects between the two N CAUTION Be sure to select the correct range for your local power standard before connecting and operating the MM 4CEU Use the AC cable wiring diagram illustrated in Figure 2 1 to create international or special purpose power connectors blue brown hot neutral yellow green earth ground chassis Figure 2 1 AC cable color codes If the colors referred to in the diagram don t correspond to the terminals in your plug use the following guidelines BE Connect the blue wire to the terminal marked with an N or colored black BE Connect the brown wire to the terminal marked with an L or colored red BE Connect the green and yellow wire to the terminal marked with an E or color
9. antes de instalar el cable de se al de audio Vuelva a conectar el conductor flexible de alimentaci n solamente una vez efectuadas todas las interconexiones de se alizaci n Conecte el aparato a un tomacorriente bipolar y trifilar con neutro de puesta a tierra El tomacorriente debe estar conectado a la protecci n de derivaci n apropiada ya sea un fusible o un disyuntor La conexi n a cualquier otro tipo de tomacorriente puede constituir peligro de descarga el ctrica y violar los c digos el ctricos locales No deje que en el aparato entre agua ni ning n objeto extra o No ponga objetos con l quidos encima de la unidad ni cerca de ella Para reducir el riesgo de sobrecalentamiento no exponga la unidad a los rayos directos del sol ni la instale cerca de artefactos que emiten calor como estufas o radiadores Este aparato contiene niveles de voltaje peligrosos en potencia No intente desarmar la unidad pues no contiene piezas que puedan ser reparadas por el usuario Las reparaciones deben efectuarse nicamente por parte del personal de mantenimiento capacitado en la f brica CONTENTS Introduction The MM 4 Miniature Wide Range Loudspeaker The MM 4CEU Control Electronics Unit Chapter 1 Installing the MM 4 Loudspeaker Using the MUB MM4 U Bracket Using the MFMA MM4 Adapter Loudspeaker Connections Standard Connector Weather Protected Connector Effect of Cable Resistance on System Performance C
10. be measured with an rms volt meter by feeding the amplifier with a tone generator at 1 kHz and measuring the input voltage going in V in and the voltage delivered at the output V out and applying the following expression Gain in dB 20 Log V out V in NOTE Some manufacturers express the gain of their amplifiers in voltage gain as a factor instead of gain in dB To covert the voltage gain in dB use the following equation Gain in dB 20 Log Voltage Gain For example a voltage gain of x20 equates to 26 dB of gain PROTECTION CIRCUITRY Avoid amplifiers with extra sensing connections for load protection the MM 4CEU incorporates all the protection circuitry necessary for reliable performance A basic reliable professional grade amplifier is all that is required The amplifier must be AC coupled to the load i e protected from producing DC at its output The MM 4 is directly coupled to the distribution line and any significant DC voltage on the line may damage the driver A relay or crowbar circuit to open or short the amplifier output in fault conditions are preferred ELECTRICAL CHARACTERISTICS Slew rate should be at least 10 volts microsecond 30 volts microsecond or better is preferred The amplifier must be stable under all load conditions shorted open inductive or capacitive Hum and noise should be such that when the amplifier input is shorted noise from the loudspeaker is indi
11. by the line configuration is required The MM 4 presents a nominal load of 16 ohms and each unit must be wired in parallel with the line As shown in Table 4 1 the number of MM 4 loudspeakers on a given signal branch can be used to determine the reguired power rating for the corresponding amplifier Table 3 1 Amplifier Power Number of MM 4 Loudspeakers Continuous Power Rating 1 16 Q load 150 W 2 8 load 300 W 3 6 3 O load 450 w 4 4 load 600 W 8 2 2 load 1200 W N CAUTION The total load of the MM 4 loudspeakers connected in parallel should not be lower than the minimum allowable load of the amplifier Otherwise damage to the amplifier and loudspeakers may result The following sections discuss important criteria for choosing and configuring power amplifiers for use with an MM 4 and MM 4CEU distributed system GAIN The gain setting of the power amplifier is crucial to system performance if the gain is set too low upstream equipment may clip before the amplifier reaches full power Conversely if the gain is set too high not only will system noise increase the amplifier is capable of overcoming the MM 4CEU s protection circuits and may damage the loudspeakers The MM 4CEU is designed to work with amplifiers having gain of between 10 dB and 30 dB NOTE The optimal amplifier gain setting for the MM 4CEU is 20 dB The gain of an amplifier can
12. near heat emitting appliances such as a room heater or stove This unit contains potentially hazardous voltages Do not attempt to disassemble the unit The unit contains no user serviceable parts Repairs should be performed only by factory trained service personnel Francais Pour r duire le risque d electrocution d brancher la prise principale de appareil avant d installer le c ble d interface allant a laudio Ne rebrancher le bloc d alimentation qu apr s avoir effectu toutes les connections Branchez appareil dans une prise de courant a 3 d rivations deux p les et la terre Cette prise doit tre munie d une protection ad quate fusible ou coupe circuit Le branchement dans tout autre genre de prise pourrait entrainer un risque d lectrocution et peut constituer une infraction la r glementation locale concernant les installations lectriques Ne pas laisser de l eau ou tout objet p n trer dans appareil Ne pas placer de r cipients contenant un liquide sur cet appareil ni a proximit de celui ci Pour viter une surchauffe de appareil conserver la a abri du soleil Ne pas installer a proximit d appareils d gageant de la chaleur tels que radiateurs ou appareils de chauffage Ce appareil contient des circuits haute tension pr sentant un danger Ne jamais essayer de le d monter Il n y a aucun composant qui puisse tre r par par l utilisateur Toutes les r parations doiv
13. 25 dB 20 20 kHz AC Power Connector Voltage selection UL CE rated voltage Current draw IEC 320 Switch selectable on rear panel 90 130 V AC 180 260 V AC 50 60 Hz 0 25 A max rear panel T 250 mA fuse protected Physical LED Indicators Controls SpeakerSense connectors Weight Finish MM 4CEU Front amp Rear Panels Sense Threshold Gain Detect 2 Red Green LEDs one per channel RMS Limiters 2 Yellow LEDs one per channel Peak Limiters 2 Yellow LEDs one per channel Power 1 Green LED Front panel 2 Rotary input attenuators one per channel 2 Recessed low cut filter switches one per channel 1 AC power latching push switch Rear Panel 1 AC voltage selector recessed 1 T250V fuse and holder MultiSense 4 dual banana two per channel Note When using multiple sense lines all lines must be in same electrical polarity 19 00 W x 1 75 H x 7 75 D standard rack mount 482 mm x 44 mm x 197 mm Black powder coated Meyer o ll Sound O Power O sv O O O MM 4 Controller A A B Lo Cut N Peak Limit 3 6 10 RMS Limit 2 O 1 Sense Pi 5 4 3 2 1 o B oO 00 ES 4 O 20 h o A O Attn dB 100 V Range T250mxa50v 100 125 200 250 200 250 V50 60 Hz V Output 15 16 17 Meyer Sound Laboratories Inc T 1 510 486 1166 O 2003 2832 San Pablo Avenue F 1 510 486 8356 Meyer Sound Laboratories Inc
14. OPERATING INSTRUCTIONS INDUSTRIAL SERIES MM 4 Miniature Wide Range Loudspeaker MM 4CEU Control Electronics Unit S Meyer i Sound DECLARATION OF CONFORMITY ACCORDING TO ISO IEC GUIDE 22 AND EN 45014 Manufacturer s Name Supplementary Information Meyer Sound Laboratories Inc The product herewith complies with the requirements of the Low Manufacturer s Address Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC 2832 San Pablo Avenue Berkeley California 94702 2204 USA Office of Quality Manager Berkeley California USA declares that the product March 27 2003 Product Name MM 4CEU European Contact Your local Meyer Sound dealer or Meyer Sound j Germany GmbH Carl Zeiss Strasse 13 56751 Polch Germany Safety EN 60065 1998 Telephone 49 2654 9600 58 Fax 49 2654 9600 59 EMC EN55103 1 1997 emission1 EN55103 2 1997 immunity2 conforms to the following Product Specifications Environmental specifications for Meyer Sound Electronics products This device complies with the requirements of the Operating Temperature 0Cto 45 C Low Voltage Directive 73 23 EEC and the Nonoperating Temperature lt 40 C or gt 75 C EMC Directive 89 336 EEC Humidity to 95 at 35 C This device also complies with EN 55103 1 amp 2 Operating Altitude 1074000 M 1130007 Operation is subject to the following two conditions Nonoperating Altitude to 6300 m 25 000 ft 1 this device may not cause ha
15. TE The EN3 displays a small dot just above Pin 1 the negative terminal See Appendix A for more information on wiring EFFECT OF CABLE RESISTANCE ON SYSTEM PERFORMANCE When specifying loudspeaker cable for an MM 4 installation it is important to take into account the total loop conductor resistance since this can affect both peak SPL capability and at the extreme system freguency response As a rule MM 4 systems will exhibit 1 2 dB peak SPL loss for every ohm of total loop wiring resistance Accordingly 12 ohms of cable resistance will result in a 6 dB peak SPL loss MM 4 systems can tolerate up to 20 ohms total cable resistance before the freguency response is affected You may want to keep the loop resistance of an MM 4 system below 1 ohm to avoid loss of peak SPL capability Tables 1 1 and 1 2 give resistance in ohms per 1000 feet and kilometers respectively per conductor for standard AWG and metric wire gauges For total resistance multiply the length of the cable by two two conductors Table 1 1 AWG Wire Resistance for Various Gauges Cable Gauge AWG Resistance 2 1000 ft 22 17 5 20 10 9 18 6 92 16 4 35 14 2 73 12 1 71 10 1 08 Table 1 2 Metric Wire Resistance for Various Gauges Cable Gauge mm Resistance Q km Y TIP For very long runs you can use a larger cable for most of the length of the run then terminate with the appropriate gauge list
16. atisfy your requirements out of the box including basic system delay and equalization settings Its accurate high resolution predictions eliminate unexpected onsite adjustments and coverage problems With MAPP Online every sound system installation has a maximum chance of success MAPP Online is compatible with Windows Linux Unix and Apple Macintosh computers running Mac OS X version 10 1 2 or higher The MAPP Online Web page lists additional system requirements and recommendations SIM MEASUREMENT SYSTEM SIM is a measurement and instrumentation system including a selection of hardware and software options microphones and accessory cables SIM is optimized for making audio frequency measurements of an acoustical system with a resolution of up to 1 24th of an octave the high resolution enables you to apply precise electronic corrections to adjust system response using frequency and phase time domain information 11 CHAPTER 4 Source Independent Measurement Technique SIM implements the Meyer Sound source independent measurement technique a dual channel method that accommodates statistically unpredictable excitation signals Any excitation signal that encompasses the frequency range of interest even intermittently may be used to obtain highly accurate measurements of acoustical or electronic systems For example concert halls and loudspeaker systems may be characterized during a musical performance using the pr
17. droom when the MM 4 is used with subwoofers for music reinforcement Consult your subwoofer s documentation for detailed information about crossover optimization TIP Systems with subwoofers will almost always require high resolution measurement and equalization to achieve the best results because low frequencies are most affected by boundary conditions and localized acoustic phenomena such as resonance CHAPTER 4 CHAPTER 4 SYSTEM DESIGN AND OPTIMIZATION TOOLS Meyer Sound offers two intuitive comprehensive tools to assist you with the acoustical and functional requirements and optimization of any system design This chapter introduces you to the Meyer Sound MAPP Online acoustical prediction tool and SIM a robust instrumentation package for system measurement analysis and more MEYER SOUND MAPP ONLINE MAPP Online is a powerful cross platform Java based application for accurately predicting the coverage pattern frequency response impulse response and maximum SPL output of single or arrayed Meyer Sound loudspeakers Residing on your computer MAPP Online facilitates configuring arrays of a wide variety of Meyer Sound products and optionally defines the environment in which they will operate including air temperature pressure and humidity as well as the location and composition of walls You can find MAPP Online at www meyersound com products software mapponline NOTE In order to use MAPP Onl
18. ed above for the connector CHAPTER 2 CHAPTER 2 THE MM 4CEU CONTROL ELECTRONICS UNIT The MM 4CEU is a required component for every MM 4 installation It performs a number of important signal processing functions to ensure that the MM 4 meets its published specifications and is protected against damaging overload conditions The MM 4CEU mounts in a standard 19 inch relay rack and occupies a single rack space 1 75 inches Each MM 4CEU provides two channels of signal processing both capable of driving several amplifier channels and monitoring two separate amplifier channels for protection four amplifier channels total per MM 4CEU Each channel of the MM 4CEU features an independent signal level attenuator and low cut switch NOTE See Chapter 3 Choosing a Power Amplifier for important details about choosing and configuring an amplifier for use with the MM 4CEU FREQUENCY AND PHASE RESPONSE CORRECTION The MM 4CEU incorporates multiple pole frequency response equalization circuitry that is tailored specifically to the MM 4 loudspeaker s acoustical characteristics This circuitry assures that the MM 4 s response remains within 4 dB from 160 Hz to 16 kHz free field Integral phase response correction circuits maintain a system phase response of 45 from 700 Hz to 17 kHz The MM 4CEU also provides an independent front panel low cut switch for each signal channel This switch introduces a high pass f
19. ed green or green and yellow SAFETY ISSUES Pay close attention to these important electrical and safety issues BE The MM 4CEU requires a grounded outlet Earth ground Chassis ground E Do not use a ground lifting adapter or cut the AC cable ground pin GA m Keep all liquids away from the MM 4CEU to avoid hazards from electrical shock E Do not operate the unit if the power cables are frayed or broken LINE LEVEL INPUTS Each MM 4CEU input presents a 10 kOhms balanced impedance to a three pin XLR female connector wired as follows E Pin1 11 kQ to chassis and earth ground ESD clamped B Pin 2 Signal m Pin 3 Signal m Case Earth AC ground and chassis NOTE Pins 2 and 3 are differentially balanced so the polarity applied to the input XLR connectors on the MM 4CEU will be replicated on the output XLR connectors Amplifier XLR polarity along with its output wiring will determine the polarity of the entire system Use standard audio cables with XLR connectors for balanced signal sources Telescopic grounding Pin 1 disconnected on one end is not recommended A single source can drive multiple MM 4CEUs with paralleled inputs To avoid distortion from the source make sure the source equipment provides an adequate drive circuit design for the total paralleled load impedance presented by the paralelled processors The input impedance for a single MM 4CEU is 10 kOhms if n r
20. ent tre effectu es par du personnel qualifi et agr par le constructeur Deutsch Um die Gefahr eines elektrischen Schlages auf ein Minimum zu reduzieren den Ger t vom Stromnetz trennen bevor ggf ein Audio Schnittstellensignalk abel angeschlossen wird Das Netzkabel erst nach Herstellung aller Signalverbindungen wieder einstecken Der Ger t an eine geerdete zweipolige Dreiphasen Netzsteckdose anschlie en Die Steckdose mu mit einem geeigneten Abzweigschutz Sicherung oder Leistungsschalter verbunden sein Der Anschlu der unterbrechungsfreien Stromversorgung an einen anderen Steckdosentyp kann zu Stromschl gen f hren und gegen die rtlichen Vorschriften versto en Darauf achten da weder Wasser noch Fremdk rper in das Innere den Ger t eindringen Keine Objekte die Fl ssigkeit enthalten auf oder neben die unterbrechungsfreie Stromversorgung stellen Um ein berhitzen dem Ger t zu verhindern das Ger t vor direkter Sonneneinstrahlung fernhalten und nicht in der N he von w rmeabstrahlenden Haushaltsger ten z B Heizger t oder Herd aufstellen Im Inneren diesem Ger t herr schen potentiell gef hrliche Spannungen Nicht versuchen das Ger t zu ffnen Es enth lt keine vom Benutzer reparierbaren Teile Reparaturen d rfen nur von ausgebildetem Kundenienstpersonal durchgef hrt werden Espa ol Para reducir el riesgo de descarga el ctrica desconecte de la red el aparato
21. epresents the number of MM 4CEUs paralleling the inputs of n MM 4CEUs loudspeakers will produce a balanced input load of 10 kOhms divided by n For example cascading an array of 10 MM 4CEUs produces an input impedance of 1000 ohms 10 kOhms divided by 10 indicating that the source equipment should have an output impedance of 100 ohms or less CHAPTER 2 NOTE Most source equipment is safe for driving loads no smaller than 10 times the source s output impedance For source equipment with driving capability of 600 ohms 16 MM 4CEUs could be safely driven in parallel 10 kOhms divided by 16 equals 625 N CAUTION Shorting any input connector pin to the chassis can create a ground loop and cause hum Y TIP If abnormal noise hum hiss popping is produced from the loudspeaker disconnect the audio source from the MM 4CEU If the noise stops the problem is not with the MM 4CEU check the audio input and AC power LINE LEVEL OUTPUTS The MM 4CEU features push pull outputs capable of driving 600 ohms and using three pin XLR male connectors wired as follows m Pin 1 Earth ground chassis B Pin 2 Signal B Pin 3 Signal NOTE The MM 4CEU is a balanced pass through device balanced signal in balanced signal out and therefore has no effect on the polarity of the signal it receives Amplifier XLR polarity along with its output wiring will determine the polarity of the entire system
22. eters 700 Hz 17 kHz 45 112 5 dB Note Measured with pink noise at 1 meter 100 dB Note Measured at 1 meter driven continuously for two hours with pink noise signal having a 12 5 dB peak average ratio 80 3 kHz 14 kHz 10 120 below 2 kHz 80 3 kHz 14 kHz 10 120 below 2 kHz Transducer One 4 cone driver Nominal impedance 16 Voice coil size 0 75 Power handling capability 100 W AES Note Power handling is measured under AES standard conditions transducer driven continuously for two hours with band limited noise signal having a 6 dB peak average ratio Aluminum enclosure dissipates heat generated by driver Physical Dimensions 4 00 H x 4 00 W x 4 20 D excluding connector 102 mm x 102 mm x 107 mm 2 89 4 78 4 00 4 15 102 mm San 122 mm Ges mm 51 mm 4 15 4 00 EL 102 mm 105 mm Weight 3 Ibs 14 oz 1 76 kg Enclosure Extruded aluminum Finish Black anodized custom color available Protective grille MM 4 Rear Panels Perforated metal screen O O ar oo INPUT LOOP OUT Meyer A ZZ Meyer H m ZZ Meyer A ZZ Meyer l 5ouna L fea Sound 4 a MM 4 Ultra Compact Wide Range Loudspeaker 98750001 MM 4 Uitra Compact Wide Range Loudspeaker 98750006 Do not loop more than 8 loudspeakers together See user manual for installation instructions See user manual for installation ins
23. fier Otherwise damage to the amplifier and loudspeakers may result G TIP The chassis mount EN3 connectors on the MM 4 rear panel are fitted with captive plastic caps If you are not using the second connector for looping use the cap to seal it against moisture invasion Standard Connector A Phoenix style keyed connector is fitted to the indoor version of the MM 4 Figure 1 3 The left hand terminal of the connector is the negative and the right hand terminal is the positive when viewing the loudspeaker from the back The connector accepts conductors up to 12 AWG American Wire Gauge or 2 5 mm OU Silo Figure 1 3 Rear panel of the indoor version of the MM 4 TIP It is possible to loop several MM 4 loud speakers together using two wires connected to each terminal of the connector Weather Protected Connector Sealed EN3 connectors are fitted to the weather protected outdoor version of the MM 4 A dedicated input connector and a loop out connector are provided to facilitate looping several MM 4 loudspeakers together The input connector on the loudspeaker is wired using the left hand terminal of the connector as the negative and the right hand terminal as the positive when viewing the loudspeaker from the back Figure 1 4 The EN3 accepts conductors up to 16 AWG 1 55 mm INPUT LOOP OUT Figure 1 4 Rear panel of the weather protected version of the MM 4 NO
24. g amplifier channel attenuators which will adjust the level of all the loudspeakers fed by that amplifier channel With the amplifier attenuators set to maximum making sure the gain does not exceed 30 dB first use the MM 4CEU 10 level controls to set zone levels Where a single MM 4CEU channel controls several zones using MultiSense use the individual amplifier channel attenuators to adjust individual zones M CAUTION When using multiple amplifiers and if adjustments are made on the amplifier channels make sure that the two amplifier channels with the highest gains are the ones connected to each of the MM 4CEU s two SpeakerSense inputs EQUALIZATION For best results the Meyer Sound CP 10 Parametric Equalizer is recommended for high resolution measurement strongly recommended the preferred tool is Meyer Sound s SIM Equalize zones individually where adjacent zones overlap significantly which is not normally preferred in distributed systems checking the overlap zone and adjusting as necessary to provide the smoothest transition between zones When the MM 4 is mounted against a wall surface or in a flush mounting bezel half space loading may cause low frequency extension and boost In voice only paging systems low frequency boost is to be avoided since it can harm intelligibility Use the MM 4CEU Lo Cut switch to compensate for half space loading effects The Lo Cut switch may also be used to increase hea
25. hapter 2 The MM 4CEU Control Electronics Unit Frequency and Phase Response Correction Driver Protection AC Power Safety Issues Line Level Inputs Line Level Outputs SpeakerSense Inputs MM 4CEU MM 4 Connection Diagram Chapter 3 Choosing a Power Amplifier Gain Protection Circuitry Electrical Characteristics Power Supply About Bridging Controlling Zone Levels Equalization Chapter 4 System Design and Optimization Tools Meyer Sound MAPP Online SIM Measurement System Source Independent Measurement Technique Applications Appendix A MM 4 Weather Protected Cable Assembly Procedure Appendix B MM 4 Specifications Appendix C MM 4CEU Specifications sch P P P oO G 0 O ONN oO o oo A ooo A h A OO OO OH 11 11 11 12 12 13 14 15 vi INTRODUCTION INTRODUCTION As you read this manual you ll find figures and diagrams to help you understand and visualize what you re reading You ll also find numerous icons that serve as cues to flag important information or warn you against improper or potentially harmful activities These icons include A NOTE identifies an important or useful piece of information relating to the topic under discussion gt A TIP offers a helpful tip relevant to the topic at hand Ax A CAUTION gives notice that an action can have serious consequences and could cause harm to equipment or personnel delays or other problems
26. igure i 2 provides frequency and phase response correction circuitry tailored to the MM 4 loudspeaker Through a SpeakerSense connection to the power amplifier output the MM 4CEU continuously monitors the power applied to the drivers activating integral peak and RMS limiters to protect against over excursion and overheating When several amplifiers are used in a system the MM 4CEU s SpeakerSense connection works by utilizing Meyer Sound s MultiSense technology allowing each channel to E Drive multiple amplifiers m Monitor two amplifier channels at once m Activate protection circuits based on the amplifier channel with the highest signal level MultiSense allows the levels of individual zones to be adjusted using the power amplifier s attenuators while still giving protection to all the loudspeakers on the same MM 4CEU channel Typically each channel of the MM 4CEU can drive 12 or more amplifier channels depending on the input impedance of the amplifier Figure i 2 The MM 4CEU Front Panel INTRODUCTION The MM 4CEU is specifically designed for use in an MM 4 loudspeaker system In conjunction with professional grade amplifiers the MM 4CEU protects your MM 4 loudspeakers against damaging overload conditions while ensuring that they meet their published specifications CHAPTER 1 CHAPTER 1 INSTALLING THE MM 4 LOUDSPEAKER The MM 4 accommodates a variety of different installation requirements to provide ma
27. ine you will need to register by clicking Apply for MAPP Online on the Web page listed above After registration and upon approval an e mail will be sent to you with a username and password along with the address for the Web page where you can download MAPP Online Instructions will guide you through the download and setup process As its name indicates MAPP Online is an Internet based application when a prediction is requested data is sent over the Internet to a high powered server at Meyer Sound that runs a sophisticated acoustical prediction algorithm using high resolution complex magnitude and phase polar data Predicted responses are returned over the Internet and displayed on your computer With MAPP Online you can E Plan an entire portable or fixed loudspeaker system and determine delay settings for fill loudspeakers m Clearly see interactions among loudspeakers and minimize destructive interference m Place microphones anywhere in the sound field and predict the frequency response impulse response and sound pressure level at the microphone position using MAPP Online s Virtual SIM feature E Refine your system design to provide the best coverage of the intended audience area E Use a Virtual VX 1 Program Equalizer to predetermine the correct control settings for best system response MAPP Online enables you to come to an installation prepared with a wealth of information that ensures the system will s
28. ogram as the test signal allowing you to E View measurement data as amplitude versus time impulse response or amplitude and phase versus frequency frequency response m Utilize a single channel spectrum mode E View frequency domain data with a logarithmic frequency axis m Determine and internally compensate for propagation delays using SIM Delay Finder function Applications The main application of SIM is loudspeaker system testing and alignment This includes m Measuring propagation delay between the subsystems to set correct polarities and set very precise delay times m Measuring variations in frequency response caused by the acoustical environment and the placement and interaction of the loudspeakers to set corrective equalization m Optimizing subwoofer integration E Optimizing loudspeaker arrays SIM can also be used in the following applications Microphone calibration and equalization Architectural acoustics Transducer evaluation and correction Echo detection and analysis Vibration analysis Underwater acoustics 12 APPENDIX A APPENDIX A MM 4 Weather Protected Cable Assembly Procedure Boot Coupling Ring Cable Cord Connector Cable Clamp Housing Contact Pins Step 1 Feed the end of the cable through the boot cable clamp housing and coupling ring in the order and position shown Cord Connector Dot pin 1 SS 3 8 Max indicator SE 24 7 32 Contact Pins
29. oklet and on the chassis Dangerous voltages risk of Important operating Frame or chassis Protective earth ground electric shock instructions Pour indiquer les risques Pour indequer important Masse ch ssis Terre de protection r sultant de tensions instructions dangereuses Zu die gefahren von Zu wichtige betriebs Rahmen oder chassis Die schutzerde gef hrliche spanning zeigen anweisung und unter haltsanweisung zeigen Para indicar voltajes Instrucciones importantes Armadura o chassis Tierra proteccionista peligrosos de funcionamiento y o manteniento IMPORTANT SAFETY INSTRUCTIONS 1 Read these instructions 11 Only use attachments accessories specified by Meyer 2 Keep these instructions un 12 Use only with the caster rails or rigging specified by a MES s arios Meyer Sound or sold with the apparatus Handles are 4 Follow all instructions for carrying only 5 Do not use this apparatus near water 6 Clean only with dry cloth AN CAUTION Rigging should only be carried out by experienced professionals 7 Do not block any ventilation openings Install in accordance with Meyer Sound s installation 13 Unplug this apparatus during lightning storms or when instructions unused for long periods of time 8 Do not install near any heat sources such as radiators 14 Refer all servicing to qualified service personnel heat registers stoves or other apparatus that produce Servicing is required when the loudspeaker has been
30. r s wattage rating doubles each time the load impedance is halved as shown in Table 3 1 An amplifier s supply is sufficiently stiff for the MM 4 if its no load peak output at clipping drops no more than 5 volts when the amplifier is connected to an 8 ohm load ABOUT BRIDGING When a power amplifier operates in bridged mode the polarity of one output is reversed with respect to the other output and both are fed the same input signal The load is connected between the channel 1 and channel 2 hot terminals If you wish to use bridged amplifiers in your MM 4 system check your amplifier s documentation to make sure which input is used for signal and which is the output terminal positive voltage out for positive input voltage applied d CAUTION In bridged mode an amplifier s minimum allowable load is twice that of each output in dual channel configuration For example if an amplifier is rated for a 4 ohm load then the minimum in bridged mode should be 8 ohms Trying to drive a 4 ohm load with such an amplifier in bridged mode will cause current clipping and could damage the loudspeakers CONTROLLING ZONE LEVELS In a typical MM 4 distributed installation there are two options for adjusting the level in a coverage zone 1 The corresponding MM 4CEU Attn dB control input attenuation which will adjust the level of all the amplifiers fed by that channel of the processor 2 The correspondin
31. rmful interference and Shock 30g 11 msec half sine on 2 this device must accept any interference received including inter each of 6 sides ference that may cause undesired operation Vibration 10 Hz to 55 Hz 0 010 m peak to peak excursion Made by Meyer Sound Laboratories Berkeley California USA European Office Meyer Sound Lab GmbH z N775 mmaceu esses CE Copyright 2003 Meyer Sound All rights reserved Meyer Sound MM 4 MM 4CEU Operating Instructions The contents of this manual are furnished for informational purposes only are subject to change without notice and should not be construed as a commitment by Meyer Sound Laboratories Inc Meyer Sound assumes no responsibility or liability for any errors or inaccuracies that may appear in this manual Except as permitted by applicable copyright law no part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical recording or otherwise without prior written permission from Meyer Sound SpeakerSense and MultiSense are trademarks of Meyer Sound Meyer Sound Meyer Sound MAPP Online and SIM are registered trademarks of Meyer Sound All third party trademarks mentioned herein are the property of their respective trademark holders Printed in the U S A Part Number 05 091 012 01 Rev D SYMBOLS USED These symbols indicate important safety or operating features in this bo
32. scernible Distortion THD or IM should be equal to or better than 0 01 percent Balanced inputs are required Input connectors should be XLR type preferred or TRS tip ring sleeve type 1 4 inch phone female connectors The MM 4CEU is a balanced pass through device balanced signal in balanced signal out and therefore has no effect on the polarity of the signal it receives Amplifier XLR polarity along with its output wiring will determine the polarity of the entire system For example an amplifier with input as Pin 2 and Pin 3 on the XLR connector with the output terminal of the amplifier connected to the terminal of the MM4 loudspeaker connector will produce a positive pressure pulse when a positive voltage pulse is applied to Pin 2 of the MM 4CEU input XLR CHAPTER 3 POWER SUPPLY Some amplifiers are designed so that the internal power supply rails sag as the load current increases While the amplifier s rated continuous output at a given load may appear high its peak output voltage varies with the load impedance Because a loudspeaker s impedance changes with frequency such an amplifier will clip prematurely at low points in the loudspeaker s impedance curve and may deliver too high a voltage at high impedance points Both possibilities are potentially damaging to the loudspeaker A stiff power supply therefore assures the best performance One indicator of a stiff supply is that the amplifie
33. tructions Use only with MM 4 CEU and approved amplifier Use only with MM 4 CEU and approved amplifier Weather protected version EN3 Connector 14 Indoor version Phoenix Style Connector APPENDIX C APPENDIX C MM 4CEU Specifications Audio Input Type Max common mode range Connector s Input Impedance Wiring DC blocking CMRR RF Filter Input Level Differential electronically balanced RF and transient protected 15 V DC clamped to earth for voltage transient protection Two female XLR one for each input channel 10 kQ differential between pins 2 and 3 Pin 1 Chassis earth through 11 ke 1000 pF 15 V clamp network to provide virtual ground lift at audio frequencies Pin 2 Signal Pin 3 Signal Case Earth ground and chassis None gt 60 dB typically 80 dB 60 Hz 1 kHz Common mode 850 kHz differential mode 370 kHz Maximum input voltage 25 V peak peak 21 dBu sine wave Audio Output Type Out voltage Connectors Output impedance Wiring Active push pull electronically balanced capable of driving 600 Load RF 8 transient protected Maximum 50 V peak peak 27 dBu sine wave Two male XLR one for each output channel 200 Q differential between pins 2 and 3 Pin 1 Chassis earth Pin 2 Signal Pin 3 Signal Audio Performance Hum and noise Dynamic range THD Response accuracy lt 90 dBV A weighted gt 115 dB lt 0 01 typically lt 002 lt 0
34. unction that can be used to compensate for low frequency boost due to half space loading in flush mounted configurations It can also augment the MM 4 loudspeaker s headroom when used with a subwoofer for music reproduction NOTE See the section Equalization in Chapter 3 Choosing a Power Amplifier for more information on using the low cut switch on the MM 4CEU DRIVER PROTECTION The MM 4CEU features Meyer Sound s SpeakerSense driver protection circuitry Through a connection back from the power amplifier output the MM 4CEU s SpeakerSense function monitors the continuous and peak power being applied to the MM 4 drivers Meyer Sound s MultiSense function then allows each MM 4CEU channel to monitor two amplifier outputs assuring that the protection circuits are activated by the signal branch with the highest gain This allows the MM 4CEU to protect the MM 4 in the following ways E When the continuous power exceeds the MM 4 s safe limits the MM 4CEU introduces an RMS limiter that clamps the audio signal to protect the MM 4 driver from damage due to overheating WR When the peak power exceeds the MM 4 s safe limits the MM 4CEU introduces a fast acting peak limiter to clamp the signal level and protect the MM 4 driver from excessive excursion The functions of the SpeakerSense circuitry are indicated on the MM 4CEU front panel by the following LEDs on each channel E Peak Limit During peak limiting the
35. ximum flexibility Mounting options include BE The MUB MM4 U Bracket which allows the MM 4 to be mounted on virtually any flat surface and enables you to change the angle of the MM 4 with respect to the mounting surface E The MFMA MM4 Flush Mount Adapter which fits standard 8 inch loudspeaker bezels for flush mounting ceiling or in wall applications USING THE MUB MM4 U BRACKET The optional MUB MM4 U Bracket mounts to the two threaded inserts in the MM 4 enclosure sides It uses two 1 2 long 3 8 16 stainless steel machine screws two 1 rubber washers two 1 metal washers and neoprene strips attached to the interior to the U Bracket as shown in Figure 1 1 Figure 1 1 Installing the MM 4 into the optional MUB MMA4 U Bracket To install the MM 4 into the MUB MM4 U Bracket 1 Gently slide the loudspeaker into the bracket seating its sides against the attached neoprene strips 2 Line up the threaded inserts on the loudspeaker near the top of the long guide hole on the bracket for maximum tilting flexibility 3 Fasten bracket to loudspeaker using two 1 2 x 3 8 16 machine screws ensuring that the 1 rubber washers touch the bracket and the 1 metal washers support the machine screws 4 Half tighten the machine screws to the bracket set the angle of the loudspeaker then tighten the machine screws further to secure the loudspeaker to the bracket Do not over tighten USING THE MFMA MM4 ADAPTER The optional
Download Pdf Manuals
Related Search