Meyer Sound M3D manuale d’uso

OPERATING INSTRUCTIONS M SERIES M3D™ Line Array Loudspeaker M3D-Sub Directional Subwoofer[...]

D ECLARATION OF C ONFORMITY A CCORDING TO ISO/IEC G UIDE AND EN 45014 The Manufacturer: Meyer Sound Laboratories, Inc. 2832 San Pablo Avenue Berkeley, California 94702-2204, USA Declares that the product: M3D™, M3D-Sub Conforms to the following Product Specifications Safety: EN60065: 1998 IEC60065: 1998 EMC: EN55103-1: 1997 emission(1) EN55103-2:[...]

S YMBOLS U SED These symbols indicate important safety or operating features in this booklet and on the chassis. I MPORTANT S AFETY I NSTRUCTIONS 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 venti[...]

S AFETY S UMMARY English – To reduce the risk of electric shock, disconnect the loudspeaker from the AC mains before installing audio cable. Reconnect the power cord only after making all signal connections. – Connect the loudspeaker to a two-pole, three-wire grounding mains receptacle. The receptacle must be connected to a fuse or circuit brea[...]

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 TPL Limiters 7 M3D Peak Limiter 8 M3D-Sub TPL Li[...]

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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 upon classic linear array principles and is a h[...]

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 fax: 510.486.8356 email: techsupport@meyerso[...]

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 circuits are depleted. The time that the M3D or M[...]

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 the information in this document to create pow[...]

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 and earth ground (ESD clamped) ■ Pin 2[...]

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 distortion from the source, make sure the source[...]

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 are connected to the amplifier in the M3D-Sub[...]

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 panel; the same on/off cycle discussed for th[...]

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 are barely audible near the cabinet, even wit[...]

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-4 electronics module from the M3D cabinet. (R[...]

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 frequencies, the M3D takes advantage of th[...]

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, be zoned for implementing different equ[...]

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 CHANNEL B HI CUT LO CUT 600 - 6K 2K - 20K OUTPUT [...]

14 • M3D ™ Line Array Meyer Sound Laboratories Inc C ABLING One method of cabling the system is using the Meyer Sound/VEAM cable system. This system incorporates power, signal, and RMS monitoring system all in one heavy-duty cable and connector per M3D cabinet. The electrical, signal, and RMS cables for each cabinet can be consolidated to creat[...]

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 adding an often preferred frequency response bump [...]

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 LD-1A line driver MID - HI OUTPU T (LOW CUT O[...]

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 for making audio-frequency measurements of a[...]

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 of arrayed Meyer Sound loudspeakers. Residin[...]

Meyer Sound Laboratories Inc M3D ™ Line Array • 19 Figure 29. Sample RMS display panel[...]

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 to 16 kHz Free field ±4 dB 42 Hz - 16 kHz; [...]

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 Wiring Pin 1: Chassis/earth through 220k ohm[...]

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 the speaker. Ultimate short-term peak current d[...]

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 >140 dB at 1 meter Horizontal coverage Ca[...]

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 Automatic, two ranges, each with high-low voltage tap[...]

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 (continued)[...]

C ONTACT I NFORMATION Meyer Sound Laboratories, Inc. 2832 San Pablo Avenue Berkeley, CA 94702 tel: 510.486.1166 fax: 510.486.8356 e-mail: techsupport@meyersound.com http: www.meyersound.com Part Number: 05.105.022.01 Rev. A (08/02)[...]