Meyer Sound M SERIES manuale d’uso

OPERA TING INSTRUCTIONS M SERIES M2D Compact Curvilinear Array Loudspeaker M2D-Sub Compact Subwoofer Keep these important operating instructions. Check www .meyersound.com for updates.[...]

ii DECLARA TION OF CONFORMITY ACCORDING TO ISO/IEC GUIDE 22 AND EN 45014 Manufacturer's Name: Meyer Sound Laboratories Inc. Manufacturer's Addr ess: 2832 San Pablo Avenue Berkeley , CA 94702-2204, USA Declares that the pr oducts Product Name: M2D and M2D-Sub Loudspeakers Product Options: All Safety: IEC 60065:1998 EN 60065:1998 UL 6500/09[...]

ii i 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 1 How to Use this Manual 1 Introducing the M2D and M2D-Sub Loudspeakers 1 CHAPTER 1: Power Requirements 3 AC Power 3 AC Power Distribution 3 Power Connector Wiring 4 V oltage and Current Requirements 5 M2D V oltage Requirements 5 M2D Current Requir ements 5 M2D-Sub V oltage Requirements 6 M2D-Sub Current Requir ements 6 CHAP[...]

vi Adding a Line Driver 20 Engaging the Lo-Cut Filter 20 Using the LD-3 21 Digital Signal Processors 21 Using the 650-P with the M2D 21 CHAPTER 5: System Design and Integration tools 23 Meyer Sound MAPP Online® 23 SIM® Measurement System 24 Source Independent Measur ement T echnique 24 Applications 24 CHAPTER 6: QuickFly® Rigging 25 MG-2D Multip[...]

1 INTRODUCTION HOW TO USE THIS MANUAL As you read this manual, you’ll nd gur es and diagrams to help you understand and visualize what you’re r eading. Y ou’ll also nd numerous icons that serve as cues to ag important information or warn you against improper or potentially harmful activities. These icons include: A NOTE identie[...]

2 INTRODUCTION With an operating frequency range of 28 Hz to 160 Hz, the dual 15-inch M2D-Sub loudspeaker complements the M2D loudspeaker in reinfor cement applications requiring extended low-frequency headr oom. The M2D-Sub loudspeaker affor ds 138 dB SPL peak output capability . It employs two Meyer Sound ferrouid cooled, back-vented drivers e[...]

3 CHAPTER 1 The M2D and M2D-Sub loudspeakers repr esent advanced technology with equally advanced power capabilities. Understanding power distribution, voltage and current requir ements, as well as electrical safety issues, is critical to their safe operation and deployment. AC POWER The M2D and M2D-Sub loudspeakers use a PowerCon ® 3-pole AC main[...]

4 CHAPTER 1 5 CHAPTER 1 Figure 1.4 shows a sample thr ee-phase AC distribution system, with the load between loudspeakers distributed among the three phases and all of the loudspeakers connected to common neutral and earth ground points. Figure 1.4. A sample AC power distribution block diagram CAUTION: Continuous voltages higher than 265 volts can [...]

4 CHAPTER 1 5 CHAPTER 1 VOL T AGE AND CURRENT REQUIREMENTS M2D V oltage Requirements The M2D loudspeaker operates safely and without audio discontinuity if the AC voltage stays within the operating window of 90 to 265 volts AC, at 50 to 60 Hz. The M2D can withstand continuous voltages up to 265 V olts and allows any combination of voltage to GND (t[...]

6 CHAPTER 1 7 CHAPTER 1 M2D-Sub V oltage Requirements The M2D-Sub loudspeaker operates safely and without audio discontinuity if the AC voltage stays within either of two operating windows at 50 or 60 Hz:  85 to 134 volts  165 to 264 volts CAUTION: Continuous voltages higher than 264 volts can damage the unit. After applying AC power , the pr[...]

6 CHAPTER 1 7 CHAPTER 1 NOTE: For best performance, the AC cable voltage drop should not exceed 10 volts, or 10 percent at 115 volts and 5 per cent at 230 volts. Make sure that even with the AC voltage dr op the AC voltage always stays in the operating windows. The minimum electrical service amperage requir ed by the M2D-Sub system is the sum of ea[...]

8 CHAPTER 1[...]

9 CHAPTER 2 The M2D and M2D-Sub loudspeakers use sophisticated amplication and protection cir cuitry to produce consistent and predictable r esults in any system design. This chapter will help you understand and harness the power of the M2D and M2D-Sub amplier and audio systems. The rear panels of the M2D and M2D-Sub loudspeakers (Figures 2.1[...]

10 CHAPTER 2 11 CHAPTER 2 When driving multiple loudspeakers in an array , make certain that the source device can drive the total load impedance presented by the paralleled input cir cuit of the array . The audio source must be capable of pr oducing a minimum of 20 dB volts (10 volts rms into 600 ohms) in order to pr oduce the maximum peak SPL ove[...]

10 CHAPTER 2 11 CHAPTER 2 � �                             Figure 2.4. The M2D loudspeaker’ s limit LED indicators If the limit LEDs are on for no longer than two seconds, and off for at least one second, th[...]

12 CHAPTER 2 13 CHAPTER 2 M2D-SUB AMPLIFICA TION The M2D-Sub loudspeaker is powered by the Meyer Sound HP-2/M2D-Sub amplier , a high-power two- channel amplier . The amplier utilizes complementary MOSFET output stages (class AB/H) capable of delivering 2250 watts total. All the specic functions for the M2D- Sub loudspeaker such as cross[...]

12 CHAPTER 2 13 CHAPTER 2 M2D-SUB AMPLIFIER COOLING SYSTEM The M2D-Sub loudspeaker uses a forced-air cooling system with two fans to prevent the amplier module from overheating. The fans draw air in thr ough ducts on the front of the cabinet, over the heatsink, and out the rear of the cabinet (Figur e 2.6). Because dust does not accumulate in th[...]

14 CHAPTER 2[...]

15 CHAPTER 3 The M2D and M2D-Sub loudspeakers are tted standar d with an RMS communication module installed in the rear of the loudspeaker . The RMS real-time networked monitoring system connects Meyer Sound self-powered loudspeakers with a Windows-based PC at the sound mix position or other remote location. Optional RMS softwar e delivers exten[...]

16 CHAPTER 3 Service Button Pressing the Service button will display an icon on the corresponding loudspeaker display icon on the RMS screen. When used in combination with the Reset button, the communications module will be decommissioned from the network and the red Service LED will blink. Wink LED (green) When lit, the Wink LED indicates that an [...]

17 CHAPTER 4 A line array , in the most basic sense, is a group of closely spaced loudspeakers arrayed in a straight line, operating with equal amplitude and in phase. Although line arrays have been used since the 1950s, line array systems that provide full bandwidth dir ectivity are r elatively new to the sound reinfor cement industry . HOW LINE A[...]

18 CHAPTER 4 19 CHAPTER 4  Horizontal Coverage . Horizontal coverage for a single array can be considered constant r egardless of the number of array elements or the angles between them. TIP: The angle between two or more line arrays can also be changed to meet additional design requir ements (for example, wall reections). Given these factors[...]

18 CHAPTER 4 19 CHAPTER 4 Figures 4.1 shows a series of MAPP Online pr edictions based on an example M2D system design. In this case, small vertical splay angles on the upper part of the array are used to cover longer distances, while gr eater angles are used in the lower elements to increase vertical coverage for shorter distances. Figure 4.1: Usi[...]

20 CHAPTER 4 21 CHAPTER 4 In addition, the use of high-pass lters to drive an M2D system with the M2D-Sub attens overall frequency response and slightly incr eases M2D headroom in the lowest end of its usable spectrum. The ideal ratio of M2D to M2D-Sub loudspeakers depends on the conguration of the system, the application, and the frequenc[...]

20 CHAPTER 4 21 CHAPTER 4 Using the LD-3 In addition to the 160 Hz high-pass lter on the LD-3, the LD-3 compensating line driver provides additional ltering capabilities to help you further ne-tune an M2D/M2D-Sub system. T able 4.2: M2D and M2D-Sub frequency response results with differ ent lter congurations HPF LPF ø Reverse Switch[...]

22 CHAPTER 4 T able 4.4: M2D and 650-P (650-P set to pin 2 positive) frequency response r esults with LD-1A, LD-2 and LD-3 (160 Hz lter) Lo-Cut ø Reverse Switch Result Off Off Flat response (small rise on 70 Hz -160 Hz area), -6 dB sub gain r ecommended* Engaged Engaged V ery at response, -6 dB sub gain recommended* * The 650-P subwoofer is [...]

23 CHAPTER 5 Meyer Sound offers two compr ehensive tools to assist you with the acoustical and functional requir ements of system design and optimization. This chapter introduces you to the Meyer Sound MAPP Online acoustical prediction pr ogram, and the SIM audio analyzer , a robust instrumentation package for system measurement, analysis, and mor [...]

24 CHAPTER 5 SIM MEASUREMENT SYSTEM The SIM audio analyzer is a measurement and instrumentation system including a selection of hardwar e and software options, micr ophones and accessory cables. The SIM analyzer is optimized for making audio frequency measurements of an acoustical system with a r esolution of up to 1/24 of an octave; the high resol[...]

25 CHAPTER 5 The M2D and M2D-Sub loudspeakers feature Meyer Sound’ s QuickFly rigging system with rugged, reliable and deceptively simple components that remain captive, in transit. QuickFly rigging facilitates constructing rigid, ground-stacked or own M2D-Sub arrays, and eases integration of M2D-Sub and M2D loudspeakers in unitary , full-rang[...]

26 CHAPTER 5 The MG-2D grid provides additional functionality , including transitioning to an M2D or M2D-Sub array from the bottom of a/an:  M3D or M3D-Sub loudspeaker (MTK-2D transition kit requir ed); or  MILO loudspeaker (MTB-2D/M transition bar kit requir ed) MG-1D Multipurpose Grid The MG-1D multipurpose grid (Figure 6.4) was originally [...]

27 APPENDIX A TROUBLESHOOTING This section contains possible solutions to some common problems encounter ed by M2D and M2D-Sub loudspeaker users and is not intended to be a comprehensive tr ouble- shooting guide. The On/T emp. LED (Active LED on M2D-Sub) does not illuminate and there is no audio. 1. Make sure the AC power cable is the corr ect type[...]

28 APPENDIX A[...]

29 APPENDIX B APPENDIX B M2D SPECIFICA TIONS ACOUSTICAL Note: The low-frequency power r esponse of the system will increase accor ding to the length of the array . Operating frequency range 60 Hz - 16 kHz Note: Recommended maximum operating frequency range. Response depends upon loading conditions and room acoustics. Frequency r esponse 70 Hz - 14 [...]

30 APPENDIX B 31 APPENDIX B RF lter Common mode: 425 kHz; Differ ential mode: 142 kHz TIM lter <80 kHz, integral to signal processing Nominal input sensitivity 0 d BV ( 1 V rm s, 1. 4 V pk ) co nt in uo us i s ty pi ca ll y th e o ns et o f li mi ti ng f or p in k no is e an d m us ic . Input level Audio source must be capable of pr oducin[...]

30 APPENDIX B 31 APPENDIX B M2D-SUB SPECIFICA TIONS ACOUSTICAL Note: The low-frequency power r esponse of the system will increase accor ding to the length of the array . Operating frequency range 28 Hz - 160 Hz Note: Recommended maximum operating frequency range. Response depends upon loading conditions and room acoustics. Frequency r esponse 30 H[...]

32 APPENDIX B Input level Audio source must be capable of pr oducing a minimum of +20 dBV (10 V rms, 14 V pk) into 600 ohms in order to pr oduce maximum peak SPL over the operating bandwidth of the loudspeaker . AMPLIFIERS Amplier type T wo-channel complementary MOSFET output stages (class AB/H) Output power 2250 W total Note: W attage rating i [...]

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© 2004 Meyer Sound Laboratories, Inc. All Rights Reserved 05.112.012.01 Meyer Sound Laboratories, Inc. 2832 San Pablo A venue Berkeley , CA 94702 USA T : +1 510 486.1166 F: +1 510 486.8356 techsupport@meyersound.com www .meyersound.com[...]