Meyer Sound M2D - Manuals

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 Voltage and Current Requirements 5 M2D Voltage Requirements 5 M2D Current Requirements 5 M2D-Sub Voltage Requi...

1 INTRODUCTION HOW TO USE THIS MANUAL 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. T...

3 CHAPTER 1 The M2D and M2D-Sub loudspeakers represent advanced technology with equally advanced power capabilities. Understanding power distribution, voltage and current requirements, as well as electrical safety issues, is critical to their safe operation and deployment. AC POWER The M2D and M2D-S...

4 CHAPTER 1 5 CHAPTER 1 Figure 1.4 shows a sample three-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 CAUTIO...

4 CHAPTER 1 5 CHAPTER 1 VOLTAGE AND CURRENT REQUIREMENTS M2D Voltage 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 Volts a...

6 CHAPTER 1 7 CHAPTER 1 M2D-Sub Voltage 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 dama...

9 CHAPTER 2 The M2D and M2D-Sub loudspeakers use sophisticated amplification and protection circuitry to produce consistent and predictable results in any system design. This chapter will help you understand and harness the power of the M2D and M2D-Sub amplifier and audio systems. The rear panels of...

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 circuit of the array. The audio source must be capable of producing a minimum of 20 dB volts (10 volts rms into 600 ohms)...

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, the M2D loudspeaker is performing within its acoustical specifica...

12 CHAPTER 2 13 CHAPTER 2 M2D-SUB AMPLIFICATION The M2D-Sub loudspeaker is powered by the Meyer Sound HP-2/M2D-Sub amplifier, a high-power two-channel amplifier. The amplifier utilizes complementary MOSFET output stages (class AB/H) capable of delivering 2250 watts total. All the specific functions ...

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 amplifier module from overheating. The fans draw air in through ducts on the front of the cabinet, over the heatsink, and out the rear of the cabinet (Figu...

15 CHAPTER 3 The M2D and M2D-Sub loudspeakers are fitted standard 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 ...

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...

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 directivity are relatively new to...

18 CHAPTER 4 19 CHAPTER 4  Horizontal Coverage . Horizontal coverage for a single array can be considered constant regardless 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 requirements (for ex...

18 CHAPTER 4 19 CHAPTER 4 Figures 4.1 shows a series of MAPP Online predictions 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 greater angles are used in the lower elements to increase vertical...

20 CHAPTER 4 21 CHAPTER 4 In addition, the use of high-pass filters to drive an M2D system with the M2D-Sub flattens overall frequency response and slightly increases M2D headroom in the lowest end of its usable spectrum. The ideal ratio of M2D to M2D-Sub loudspeakers depends on the configuration of...

20 CHAPTER 4 21 CHAPTER 4 Using the LD-3 In addition to the 160 Hz high-pass filter on the LD-3, the LD-3 compensating line driver provides additional filtering capabilities to help you further fine-tune an M2D/M2D-Sub system. Table 4.2: M2D and M2D-Sub frequency response results with different filt...

23 CHAPTER 5 Meyer Sound offers two comprehensive tools to assist you with the acoustical and functional requirements of system design and optimization. This chapter introduces you to the Meyer Sound MAPP Online acoustical prediction program, and the SIM audio analyzer, a robust instrumentation pack...

24 CHAPTER 5 SIM MEASUREMENT SYSTEM The SIM audio analyzer is a measurement and instrumentation system including a selection of hardware and software options, microphones and accessory cables. The SIM analyzer is optimized for making audio frequency measurements of an acoustical system with a resolu...

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 flown M2D-Sub arrays, and eases integration of M2D-S...

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 required); or  MILO loudspeaker (MTB-2D/M transition bar kit required) MG-1D Multipurpose Grid The MG-1D mul...

27 APPENDIX A TROUBLESHOOTING This section contains possible solutions to some common problems encountered by M2D and M2D-Sub loudspeaker users and is not intended to be a comprehensive trouble-shooting guide. The On/Temp. LED (Active LED on M2D-Sub) does not illuminate and there is no audio. 1. Mak...

29 APPENDIX B APPENDIX B M2D SPECIFICATIONS ACOUSTICAL Note: The low-frequency power response of the system will increase according 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 r...

30 APPENDIX B 31 APPENDIX B RF filter Common mode: 425 kHz; Differential mode: 142 kHz TIM filter <80 kHz, integral to signal processing Nominal input sensitivity 0 dBV (1 V rms, 1.4 V pk) continuous is typically the onset of limiting for pink noise and music. Input level Audio source must be cap...

30 APPENDIX B 31 APPENDIX B M2D-SUB SPECIFICATIONS ACOUSTICAL Note: The low-frequency power response of the system will increase according to the length of the array. Operating frequency range 28 Hz - 160 Hz Note: Recommended maximum operating frequency range. Response depends upon loading condition...

32 APPENDIX B Input level Audio source must be capable of producing a minimum of +20 dBV (10 V rms, 14 V pk) into 600 ohms in order to produce maximum peak SPL over the operating bandwidth of the loudspeaker. AMPLIFIERS Amplifier type Two-channel complementary MOSFET output stages (class AB/H) Outpu...