Page 5 - ONTENTS
C ONTENTS Introduction 1 AC Power 2 AC Power Distribution 2 Voltage Requirements 2 Current Requirements 3 Power Connector Wiring Conventions 3 Safety Issues 5 Audio Input 5 Amplification and Protection Circuitry 6 M3D Interconnections 6 M3D-Sub Interconnections 7 The TruPower™ Limiting System 7 M3D ...
Page 7 - Operating Instructions; NTRODUCTION; M3D Line Array with BroadBandQTM; M3DTM Line Array
Operating Instructions Meyer Sound Laboratories Inc M3D™ Line Array • 1 I NTRODUCTION The M3D Line Array is a part of the Meyer Sound M Series, which is a fully integrated line of loudspeakers that brings singular advantages to real-world applications. The M3D Line Array, shown in Figure 1, draws up...
Page 8 - AC P; OWER; AC Power Distribution; Active; Neutral
2 • M3D™ Line Array Meyer Sound Laboratories Inc Information and specifications are applicable as of the date of printing. Updates and supplementary information are posted on the Meyer Sound web site at: http://www.meyersound.com or you may contact Meyer Sound Technical Support at: Tel: 510.486.1166...
Page 9 - Power Connector Wiring Conventions; M3D and M3D-Sub Current Ratings; Do
Meyer Sound Laboratories Inc M3D™ Line Array • 3 If the voltage decreases below the lower boundary of either operating range (brownout), the supply uses stored energy to continue functioning briefly. The unit turns off only if the voltage does not increase above the threshold before the storage circ...
Page 10 - VEAM Cable Wiring Reference,
4 • M3D™ Line Array Meyer Sound Laboratories Inc For M3D or M3D-Sub loudspeakers fitted with the VEAM multipin connector please refer to the Meyer Sound document, VEAM Cable Wiring Reference, part number 06.033.113, for the wiring conventions and pinouts for the AC, audio, and RMS connections. Use t...
Page 11 - Do not use AC adapters
Meyer Sound Laboratories Inc M3D™ Line Array • 5 S AFETY I SSUES Pay close attention to these important electrical and safety issues. A UDIO I NPUT The M3D or M3D-Sub presents a 10k ohm balanced input impedance to a three-pin XLR connector with the following connectors: ■ Pin 1 — 220k ohm to chassis...
Page 12 - M3D Interconnections; M3D rear panel audio input connectors; (Positions are in reference to front of enclosure)
6 • M3D™ Line Array Meyer Sound Laboratories Inc The input impedance for a single M3D or M3D-Sub is 10k ohms; if n represents the number of M3D or M3D-Sub loudspeakers in an array, paralleling the inputs of n M3Ds or M3D-Subs will produce a balanced input load of 10k ohms divided by n . To avoid dis...
Page 13 - M3D-Sub Interconnections; M3D TPL Limiters; M3D-Sub internal wiring harness diagram; M3D Limit LEDs
Meyer Sound Laboratories Inc M3D™ Line Array • 7 M3D-Sub Interconnections Each front 4 ohm, 18-inch, low-frequency driver is powered by one channel of the HP-4/M3D-Sub amplifier; also, each rear 8 ohm, 15-inch low-frequency driver is powered by one amplifier channel. Figure 13 shows how the drivers ...
Page 14 - ANS; Airflow of M3D
8 • M3D™ Line Array Meyer Sound Laboratories Inc M3D Peak Limiter When engaged, the Peak Limiter prevents signal peaks from causing distortion in the high channel, preserving headroom and maintaining smooth frequency response at high levels. Peak limiting is indicated by the Hi Peak LED on the user ...
Page 15 - Opening the Rain Hood; Rain hood stiffener pockets
Meyer Sound Laboratories Inc M3D™ Line Array • 9 Two variable-speed primary fans run continuously with an inaudible operating noise of 22 dBA at 1 m at their slowest speed. The primary fans begin increasing speed when either of the two heatsinks reaches 42˚C. The fans reach full speed at 62˚C and ar...
Page 16 - How Do Line Arrays Work?; Location of eight screws securing rain
10 • M3D™ Line Array Meyer Sound Laboratories Inc Removing the M3D/M3D-Sub Amplifier If you need to remove the M3D amplifier, you must first remove the rain hood, as follows: 1. Using a #2 Phillips screwdriver, remove all eight screws from the rain hood. This will free both the rain hood and the HP-...
Page 17 - Adjusting a Line Array’s Coverage; Eight versus sixteen M3D line arrays
Meyer Sound Laboratories Inc M3D™ Line Array • 11 H YBRID L INE A RRAYS The M3D is a high-powered BroadbandQ™ loudspeaker system. In order to effectively array, drive, and optimize a system to produce optimal results, it’s important to understand how a hybrid line array loudspeaker works. For high f...
Page 18 - Using vertical splay to adjust a line array’s coverage
12 • M3D™ Line Array Meyer Sound Laboratories Inc With these two technologies (low-frequency line array and high-frequency wave guide) combined in a single product, it's important to understand how to best electronically drive a hybrid line array. The high- frequency section can, and usually should,...
Page 19 - Wiring diagram of a typical M3D installation
Meyer Sound Laboratories Inc M3D™ Line Array • 13 Figure 22. Wiring diagram of a typical M3D installation DIGITAL DELAY (1) 2-IN x 4-OUT 60 - 600 HI CUT LO CUT OUTPUT INPUT CLIP POWER 20 - 200 CUT / BOOST BANDWIDTH FREQUENCY 600 - 6K CHANNEL A 200 - 2K 2K - 20K OUT IN 20 - 200 60 - 600 200 - 2K CHAN...
Page 21 - M3D Line Array; and M3D-Sub with looped connections; M3D Line Array; and M3D-Sub with M3D-Sub attenuated by 6 dB
Meyer Sound Laboratories Inc M3D™ Line Array • 15 When the two are driven with the same signal but the M3D-Sub is attenuated by 6 dB, the response is identical to the M3D Line Array alone but extends to 30 Hz, as shown in Figure 25. The third option provides optimal headroom to the M3Ds, while addin...
Page 22 - M3D and M3D-Sub headroom optimization using an LD-1A line driver; M3D and M3D-Sub headroom optimization using an LD-2 line driver
16 • M3D™ Line Array Meyer Sound Laboratories Inc Figure 27 shows an LD-2 line driver configured to produce the same results as the LD-1A line driver shown in Figure 26. The comparison plot when using these configurations is shown Figure 28. Figure 26. M3D and M3D-Sub headroom optimization using an ...
Page 23 - SIM; YSTEM; II; Applications
Meyer Sound Laboratories Inc M3D™ Line Array • 17 SIM ® S YSTEM II SIM System II is a powerful, compact instrumentation product line comprising the SIM-2201 Sound Analyzer, SIM-2403 Interface Network, and a selection of software options, microphones and accessory cables. The instrument is optimized ...
Page 24 - MAPP O; Monitor Displays
18 • M3D™ Line Array Meyer Sound Laboratories Inc M EYER S OUND MAPP O NLINE ™ MAPP (Multipurpose Acoustical Prediction Program) Online is a powerful, cross-platform, Java-based application for accurately predicting the coverage pattern, frequency response, impulse response, and maximum SPL output o...
Page 25 - Sample RMS display panel
Meyer Sound Laboratories Inc M3D™ Line Array • 19 Figure 29. Sample RMS display panel
Page 26 - PPENDIX; M3D Line Array Specifications; Acoustical; Note
20 • M3D™ Line Array Meyer Sound Laboratories Inc A PPENDIX A - M3D L INE A RRAY S PECIFICATIONS Table 2. M3D Line Array Specifications Acoustical Note: The low-frequency power response of the system will increase according to the length and configuration of the array Operating frequency range 35 Hz...
Page 27 - Audio input; M3D Line Array Specifications (continued)
Meyer Sound Laboratories Inc M3D™ Line Array • 21 Audio input Type Differential, electronic balanced Maximum common mode range ±15 V DC, clamped to earth for voltage transient protection Connectors Female XLR input with male XLR loop output Input impedance 10k ohms differential between pins 2 and 3 ...
Page 28 - RMSTM Network
22 • M3D™ Line Array Meyer Sound Laboratories Inc Burst current (<1 sec) 32 A RMS (115 V) 16 A RMS (230 V) 36A RMS (100 V) Note: AC power cabling must be of sufficient gauge so that under burst current conditions, cable transmission losses do not drop voltage below specified operating range at th...
Page 29 - M3D-Sub Directional Subwoofer
Meyer Sound Laboratories Inc M3D™ Line Array • 23 A PPENDIX B - M3D-S UB D IRECTIONAL S UBWOOFER S PECIFICATIONS Table 3. M3D-Sub Directional Subwoofer Acoustical Operating frequency range ±4dB 30 Hz - 88 Hz -6 dB at 29 Hz and 95 Hz Phase response ±30˚ Hz - 95 Hz; + 90˚ at 30 Hz Maximum peak SPL >...
Page 30 - AC Power
24 • M3D™ Line Array Meyer Sound Laboratories Inc Cooling Forced air cooling, four fans total, two ultra high-speed reserve fans AC Power AC power connector 250VAC NEMA L6-20 (twistlock) inlet or IEC 309 male inlet Optional VEAM connector (integrates AC, audio and network) Voltage selection Automati...
Page 31 - M3D-Sub Directional Subwoofer physical dimensions
Meyer Sound Laboratories Inc M3D™ Line Array • 25 Figure 31. M3D-Sub Directional Subwoofer physical dimensions Weight Shipping weight Net: 395 lbs (179 kg) Net: 480 lbs (219 Kgs) Safety Agency Recognitions CE Compliant UL Listed IEC 60065 (1998) Compliant Table 3. M3D-Sub Directional Subwoofer (cont...
