Meyer Sound MM-4CEU manuale d’uso

OPERA TING INSTRUCTIONS INDUSTRIAL SERIES MM-4 Miniatur e Wide-Range Loudspeaker MM-4CEU Contr ol Electr onics Unit Keep these important operating instructions. Check www .meyersound.com for updates.[...]

ii ® Copyright 2010 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 [...]

iii SYMBOLS USED These symbols indicate important safety or operating features in this booklet and on the chassis: 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this loudspeaker near water . 6. Clean only with dry cloth. 7. Do not block any ventilation openings. Install in ac[...]

iv English - T o reduce the risk of electric shock, disconnect the loudspeaker from the AC mains befor e installing audio cable. Reconnect the power cord only after making all signal connections. - Connect the loudspeaker to a two-pole, three-wir e grounding mains receptacle. The r eceptacle must be connected to a fuse or circuit br eaker . Connect[...]

v CONTENTS INTRODUCTION The MM-4 Miniature Wide-Range Loudspeaker 1 The MM-4CEU Control Electr onics Unit (Requir ed) 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 W eather -Pr otected Connector 4 Effect of Cable Resistance on System Performan[...]

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1 INTRODUCTION As you read this manual, you’ll find figur es and diagrams to help you understand and visualize what you’re r eading. Y ou’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 usefu[...]

2 INTRODUCTION The MM-4CEU is specifically designed and requir ed for use in an MM-4 loudspeaker system. In conjunction with professional grade amplifiers, the MM-4CEU pr otects your MM-4 loudspeakers against damaging overload conditions, while ensuring that they meet their published specifications.[...]

3 CHAPTER 1 The following MM-4 mounting options accoommodate a variety of differ ent installation r equirements:   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.   The MFMA-MM4 flush mount adapter , which fi[...]

4 CHAPTER 1 Standard Connector A Phoenix-style keyed connector is fitted to the indoor version of the MM-4 (Figure 1.3). The connector is wir ed with the left terminal as negative (-) and the right terminal as positive (+), when viewing the loudspeaker from the r ear . The Phoenix cable mount connector accepts conductors up to 12 AWG ( Ameri can W[...]

5 CHAPTER 2 The MM-4CEU is a requir ed component for every MM-4 installation. It performs a number of important signal- processing functions to ensur e that the MM-4 meets its published specifications and is protected against damaging overload conditions. The MM-4CEU mounts in a standard 19-inch r elay rack and occupies a single rack space (1.75 i[...]

6 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. ! CAUTION: Be sure to select the corr ect range for your local power standard befor e connecting and operating the MM-4CEU. Use the AC cable wiring diagram, illustrate[...]

7 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). ! CAUTION: Shorting any input connector pin to the chassis can create a gr ound loo[...]

8 CHAPTER 2 Channel 2 SpeakerSense Channel 1 SpeakerSense Figure 2.2. Connecting the MM-4CEU control electronics unit NOTE: Amplifiers #1 and #2 are the amplifiers with the highest gain.[...]

9 CHAPTER 3 The MM-4 is designed for high-quality distributed sound systems. T o 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 presented by the line configuration is requir ed. The MM-4 pr esents a nominal load of 16 ohms, and each unit must be wired in[...]

10 CHAPTER 3 POWER SUPPL Y Some amplifiers are designed so that the internal power supply rails sag as the load current incr eases. 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 amplifi[...]

11 CHAPTER 4 Meyer Sound of fers two compr eh ensive tool s to assist you with t he ac ousti cal an d fun ction al r equ ir ement s of s ystem design and optimization. This chapter introduces you to MAPP O nline Pr o, M eyer Sound’ s power ful o nline acous tical prediction tool, and SIM 3, a r obust instrumentation package for system measurement[...]

12 CHAPTER 4 The ke y to MAPP Online Pr o’ s value i s the accu racy o f its pr edict ions. Perfo rmanc e pr edi ctions for each Meyer Sound loudsp eaker foun d in M APP O nline Pr o ar e based on a model of th at pr od uct b uilt f r om 360 1/48 th-oc tave–b and measurements taken with a SIM audio analyzer in our anecho ic ch amber . Th e ext [...]

13 APPENDIX A APPENDIX A MM-4 W eather Pr otected Cable Assembly Pr ocedure Cable Boot Cord Connector Cable Clamp Housing Contact Pins Coupling Ring Step 1: Feed the end of the cable through the boot, cable clamp housing, and coupling ring in the order and position shown. Cable 3/8" Max. 7/32" Step 2: Strip cable as shown and solder condu[...]

14 APPENDIX B APPENDIX B MM-4 Specifications Acoustical (MM-4CEU requir ed) Note: T o real ize th e MM-4 ’ s full ca pabili ties, an MM- 4CEU mu st be used. The amp lifier drivin g the l oudspe akers should be cap able o f 49 v olts RMS at the ra ted lo ad impe dance, and p rov ide a voltage gain betwee n 10 a nd 30 d B (20 dB for optima l S/N r[...]

15 APPENDIX C APPENDIX C MM-4CEU Specifications MM-4 Controller Power -15V Peak Limit RMS Limit Sense A B B A Lo Cut In Out Attn dB B A 1 5 6 h 20 10 8 3 2 4 0 1 5 6 h 20 10 8 3 2 4 0 A Amp 1 B Input A Sense - Amp 2 - + + Amp 1 B Sense - - + + Amp 2 Output A B 125 100- 100-125 V50-60 Hz 200- 200-250 V V Range 250 T160mA 250V MM-4CEU Front & Rea[...]

16 APPENDIX D APPENDIX D MM-4 EN3 Fire Alarm Signaling Specifications -6 -6 -3 -3 140° 160° 90° 20° 40° 0° 180° Rated Horizontal Axis 3m SPEAKER -6 -6 -3 -3 140° 160° 90° 30° 50° 0° 180° Rated V ertical Axis 3m SPEAKER DIRECTIONAL CHARACTERISTIC Per S541 -07 Sec. 7.5 Acoustical (Fire Alarm Amplifier Requir ed) Frequency r esponse Fir[...]

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© 2010 Meyer Sound Laboratories Inc. 05.091.012.01 Rev . F Meyer Sound Laboratories Inc. 2832 San Pablo Avenue Berkeley , CA 94702 www .meyersound.com T : +1 510 486.1166 F: +1 510 486.8356[...]