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OPERATING INSTRUCTIONS INDUSTRIAL SERIES
MM-4 Miniature Wide-Range Loudspeaker
MM-4CEU Control Electronics Unit
Keep these important operating instructions.
Check www.meyersound.com for updates.
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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 Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC. manufacturer's Address: 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 Product Options: All Eur
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SymbOLS USED These symbols indicate important safety or operating features in this booklet 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, châssis Terre de protection résultant de tensions instructions dangereuses Zu die gefahren von Zu wichtige betriebs- Rahmen oder chassis Die schutzerde gefährliche spanning zeigen anweisung und unter- haltsanweisu
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SAfETy SUmmAR y - Ne pas laisser de l’eau ou tout Haushaltsgeräten (z.B. Heizgerät English objet pénétrer dans l’haut-parleur. oder Herd) aufstellen. - To reduce the risk of electric Ne pas placer de r´cipients - Im Inneren diesem Lautsprecher shock, disconnect the loudspeaker contenant un liquide sur cet herr-schen potentiell gefährliche from the AC mains before installing appareil, ni à proximité de celui-ci. Spannungen. Nicht versuchen, audio cable. Reconnect the power - Pour év
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CONTENTS INTRODUCTION The MM-4 Miniature Wide-Range Loudspeaker 1 The MM-4CEU Control Electronics Unit (Required) 1 ChAPTER 1 : Installing the mm-4 Loudspeaker 3 Using the MUB-MM4 U-Bracket 3 Using the MFMA-MM4 Adapter 3 Loudspeaker Connections 3 Standard Connector 4 Weather-Protected Connector 4 Effect of Cable Resistance on System Performance 4 ChAPTER 2 : The mm-4CEU Control Electronics Unit 5 Frequency and Phase Response Correction 5 Driver Protection 5 AC Power 6 Safety Issues 6 Line Lev
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INTRODUCTION INTRODUCTION As you read this manual, you’ll find figures and diagrams The MM-4 consists of a single 4-inch cone driver with a 16- to help you understand and visualize what you’re reading. ohm voice coil mounted in a sealed enclosure. Connecting You’ll also find numerous icons that serve as cues to flag directly to your amplifier, the MM-4 draws 150 watts peak important information or warn you against improper or from the line to produce 112.5 dB peak SPL. Typically, with potent
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INTRODUCTION The MM-4CEU is specifically designed and required 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. 2
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CHAPTER 1 ChAPTER 1: INSTALLING ThE mm-4 LOUDSPEAkER The following MM-4 mounting options accoommodate a USING ThE mfmA-mm4 ADAPTER variety of different installation requirements: The optional MFMA-MM4 flush mount adapter allows The MUB-MM4 U-bracket, which allows the MM-4 to the MM-4 to be used with virtually any ceiling or in-wall be mounted on virtually any flat surface and enables flush-mount bezel designed to house an 8-inch cone you to change the angle of the MM-4 with respect to
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CHAPTER 1 Standard Connector TIP: The chassis-mount EN3 connectors on A Phoenix-style keyed connector is fitted to the indoor the MM-4 rear panel are fitted with captive version of the MM-4 (Figure 1.3). The connector is wired plastic caps. If you are not using the second with the left terminal as negative (-) and the right terminal connector for looping, use the cap to seal it against as positive (+), when viewing the loudspeaker from the rear. moisture invasion. The Phoenix cable mount
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CHAPTER 2 ChAPTER 2: ThE mm-4CEU CONTROL ELECTRONICS UNIT The MM-4CEU is a required component for every MM-4 DRIVER PROTECTION installation. It performs a number of important signal- The MM-4CEU features Meyer Sound’s SpeakerSense processing functions to ensure that the MM-4 meets its driver protection circuitry. Through a connection back from published specifications and is protected against damaging the power amplifier output, the MM-4CEU’s SpeakerSense overload conditions. function moni
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CHAPTER 2 Do not use a ground-lifting adapter or cut the AC cable AC POWER ground pin. 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. 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 Keep all liquids away from the MM-4CEU to avoid cre
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CHAPTER 2 SPEAkERSENSE INPUTS NOTE: Most source equipment is safe for For each MM-4CEU channel, connect a cable from the driving loads no smaller than 10 times the amplifier output to the corresponding SpeakerSense source’s output impedance. input. If you are driving multiple amplifier channels from a single MM-4CEU output and using MultiSense, connect For source equipment with driving capability of 600 ohms, the two amplifier output channels with the highest gain 16 MM-4CEUs could be sa
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CHAPTER 2 NOTE: Amplifiers #1 and #2 are the amplifiers with the highest gain. Channel 2 SpeakerSense Channel 1 SpeakerSense Figure 2.2. Connecting the MM-4CEU control electronics unit 8
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CHAPTER 3 ChAPTER 3: ChOOSING A POWER AmPLIfIER The MM-4 is designed for high-quality distributed sound NOTE: Some manufacturers express the gain systems. To realize the MM-4’s full capabilities, a direct- of their amplifiers in voltage gain as a factor drive power amplifier capable of 49 volts rms (70 volts instead of gain in dB. To covert the voltage gain in peak) at the rated load impedance presented by the line dB, use the following equation: configuration is required. The MM-4 present
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CHAPTER 3 With the amplifier attenuators set to maximum (making sure POWER SUPPLy the gain does not exceed 30 dB), first use the MM-4CEU Some amplifiers are designed so that the internal power level controls to set zone levels. Where a single MM-4CEU supply rails sag as the load current increases. While the channel controls several zones (using MultiSense), use the amplifier’s rated continuous output at a given load may individual amplifier channel attenuators to adjust individual appear
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CHAPTER 4 ChAPTER 4: SySTEm DESIGN AND INTEGRATION TOOLS Meyer Sound offers two comprehensive tools to assist you NOTE: To use MAPP Online Pro, you will with the acoustical and functional requirements of system need to register by clicking the “Apply for design and optimization. This chapter introduces you to MAPP Online Pro” button on the Web page listed MAPP Online Pro, Meyer Sound’s powerful online acoustical previously, or the “MAPP Online Pro” button on prediction tool, and
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CHAPTER 4 The key to MAPP Online Pro’s value is the accuracy of its Source Independent measurement Technique predictions. Performance predictions for each Meyer Sound The SIM 3 audio analyzer implements the Meyer Sound loudspeaker found in MAPP Online Pro are based on a source independent measurement technique, a dual- model of that product built from 360 1/48th-octave–band channel method that accommodates statistically measurements taken with a SIM audio analyzer in our unpredictable exc
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APPENDIX A APPENDIx A mm-4 Weather Protected Cable Assembly Procedure Boot Coupling Ring Cord Connector Cable 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 Cable Solder 3/8" Max. indicator) 2+ 1- 1- 7/32" 2+ 9/32" Contact Pins Step 2: Strip cable as shown and solder conductors to pins. NOTE: Pin 1 is negative (-) and pin 2 is positive (+) Cord Connector
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APPENDIX B APPENDIx b mm-4 Specifications Acoustical (mm-4CEU required) Note: To realize the MM-4’s full capabilities, an MM-4CEU must be used. 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 Ω): 150 W; 2 MM-4/ch (8 Ω): 300 W; 4 MM-4/ch (4 Ω): 600 W; 8 MM-4/ch (2 Ω): 1200 W
