M3D : Line Array Loudspeaker

The Meyer Sound. M3D. line array speakers  can be an revolutionary collection array method for medium-to long-throw applications. The merchandise of extra than two many years of intensive review and development, the M3D attributes BroadbandQ. engineering — a unique, integrated arranged of engineered developments that optimize collection array performance.

The M3D high-frequency part comprises two Meyer seem 4-inch diaphragm compression motorists coupled to some constant-directivity horn by method of a patented REM. ribbon emulaton manifold. The manifold closely approximates the radiation feature of the ribbon driver, affording really tight vertical and broad 90-degree horizontal coverage, even although providing the energy ability of compression drivers.

Four 15-inch cone motorists within a vented enclosure comprise the M3D's low-frequency section. Two high-power 15-inch motorists (4-inch voice coil) with neodymium magnets confront forward. These motorists are capable of the whole half-inch of linear excursion. inside the rear in the cabinet, two 15-inch cone motorists driven with a superior point manipulation circuit provide broadband directional manage and reinforce the output in the front-facing drivers. This novel engineering affords controlled cardioid protection to 35 Hz.

A complicated mid-range point and magnitude alignment between the two front-facing 15-inch cone motorists prevents destructive combing throughout the M3D's horizontal coverage. TruPower. limiting engineering guarantees optimum driver protection, minimizes energy compression and permits large steady output below large steady and peak energy conditions.

The self-powered M3D produces a optimum output of 145 dB peak SPL at one meter within its working volume range of 35 Hz to 18 kHz. The amplifier, manage electronics and energy provide are integrated right into a single, field-replaceable module mounted in the rear in the cabinet.

The four-channel course AB/H energy amplifier with complementary MOSFET output stages produces 4500 watts maximum. The M3D’s Intelligent AC. energy provide affords automated voltage selection, EMI filtering, gentle latest turn-on and surge suppression. Phase-corrected productive digesting circuits help preserve terrific standard performance and reliability, along using the large common-mode rejection in the laser-trimmed differential input permits lengthy signal runs by method of a uncomplicated shielded twisted pair cable.

The M3D cupboard is coated using a textured dark finish. Integral metallic grilles safeguard the cone drivers, as well as a bad weather hood is fitted to safeguard the electronics from wetness intrusion. The optional QuickFly. MG-3D/M multipurpose grid allows possibly flying or soil stacking many different combinations of M3D and M3D-Sub. as a good offer as 16 M3Ds (or the equivalent unwanted weight of M3D and M3D-Sub) could possibly be flown using a 7:1 protection factor. as a good offer as 4 M3Ds, 4 M3D-Subs or three M3Ds and one M3D-Sub could possibly be safely soil stacked. Specially-designed caster rails facilitate switching stacks of as a good offer as 4 cabinets, and optional material addresses safeguard the cabinets in transit.

Meyer Sound's RMS. remote monitoring method is fitted as standard, providing thorough monitoring of method standard performance parameters over a microsof company Windows. network.

features & benefits
Controlled broadband directivity minimizes reverberation for best clarity
Cardioid low-frequency pattern maximizes obtain previous to feedback
Optimized collection array conduct provides steady response over lengthy throws
Multiple vertical collection arrays could possibly be splayed horizontally to broaden coverage

Prodigious low-frequency ability can eradicate qualification for subwoofers in some applications
Self-powered for simplified set up and enhanced reliability
Seamless integration with other M sequence models

applications

Stadiums, arenas and concert halls
Touring seem reinforcement
Large-scale local community occasions

The loudspeaker should certainly be considered a self-powered, full-range unit for deployment in collection array systems. The low-frequency transducers should certainly consist of 4 15-inch cone drivers: two front-facing products with 4-inch voice coil rated to manage 1200 AES* watts, and two rear-facing products with 3-inch voice coil rated to manage 600 AES watts. The rear-facing 15-inch transducers should certainly be separately driven with a cycle manipulation circuit so founded and tuned how the rear transducers’ output reinforces forward low-frequency energy even although canceling rearward mid-low energy by as very much as 25 dB as measured 8-feet distant away from your enclosure's rear face. High-frequency transducers should certainly be two 4-inch diaphragm (1.5-inch exit) compression motorists rated to manage 250 AES watts each and every and coupled by means of a custom made REM ribbon emulation manifold to some 90° horizontal constant directivity horn.

The loudspeaker should certainly incorporate inner digesting electronics as well as a four-channel amplifier. digesting features should certainly consist of volume response equalization, cycle correction, driver protection and signal division for the high- and low-frequency sections. The crossover place (equal seem stress ranges between high- and low-frequency transducers) should certainly be 580 Hz. An extra low-frequency crossover should certainly cause the two front-facing 15-inch transducers to purpose in mixture between 35 Hz and 140 Hz, and one transducer to purpose alone from 140 Hz to 580 Hz, so concerning sustain optimal polar and volume response characteristics.

Each amplifier funnel should certainly be course AB/H with complementary MOSFET output stages. Burst ability should certainly be 4500 watts complete with nominal 4-ohm resistive load. Distortion (THD, IM, TIM), unloaded, should certainly not exceed 0.02%. protection circuits should certainly consist of TruPower limiting. The audio tracks input should certainly be electronically well balanced using a 10 kOhm impedance and accept a nominal 0 dB
V (1 V rms) signal (20 dB V to create optimum peak SPL). Connectors should certainly be XLR (A-3) sort male and female. RF filtering should certainly be provided, and CMRR should certainly be higher than fifty dB (80 dB, fifty Hz to 500 Hz).

Performance specifications for just about any sole standard producing unit should certainly be as follows, measured at 1/3 octave resolution: working volume range should certainly be 35 Hz to 18 kHz. cycle response should certainly be ±30° from 300 Hz to 14 kHz. optimum SPL should certainly be 145 dB at one meter. Horizontal protection should certainly be cardioid in decrease frequency; 90° in considerable frequency. (Vertical protection in multi-cabinet arrays should certainly be dependent on method configuration.)

The inner energy provide should certainly hold out automated voltage selection, EMI filtering, gentle present turn-on and surge suppression. Powering specifications should certainly be nominal 100 V, 110 V or 230 V AC collection present at fifty or sixty Hz. UL and CE rated working voltage ranges should certainly be 95 to 125 V AC and 208 to 235 V AC. present draw through burst should certainly be 32 A at 115 V AC and 16 A at 230 V AC, and present inrush through gentle turn-on should certainly not exceed twelve A at 115 V AC. AC energy connectors should certainly be locking NEMA connector, IEC male or VEAM all-in-one.

The loudspeaker method should certainly incorporate the electronics module for Meyer Sound’s RMS remote monitoring system.

All loudspeaker components should certainly be mounted in an enclosure made of multi-ply hardwood using a challenging dark textured finish. The the front protective grille should certainly be powder-coated, hex stamped steel. Dimensions should certainly be 54.00" broad x 20.00" considerable x 30.50" deep (1372 mm x 508 mm x 775 mm). bodyweight should certainly be 415 lbs (188.25 kg).

The loudspeaker should certainly be the Meyer seem M3D.
*Driven constantly for twohours using a band-limited audio tracks
signal owning a 6 dB peak-to-average ratio.


About the Vertical Directivity Plots

The color pictures accompanying the upper diagram for the facing site are seem intensity plots made utilizing the Meyer seem MAPP Online. acoustical prediction program, a remarkable and extremely precise visualization unit for professional seem method designers.

Using an Internet-connected individual computer, the custom made specifies Meyer seem loudspeaker models, their locations, how they are aimed and, optionally, the spots and composition of
walls. This information and details travels much more compared to internet to some potent server pc at Meyer seem headquarters in Berkeley, Calif. operating a superior algorithm and utilizing extremely precise measured information that describe each and every loudspeaker's directional characteristics, the server predicts the seem area how the loudspeakers will produce, types a color representation belonging in the direction of the seem field, and sends the complete result back again for the designer's pc to display.

In these seem area plots, the color array is employed to represent ranges of seem intensity, with red-colored getting the loudest and blue the softest, as verified even although in the scale in the direction of the instant right. These illustrations illustrate protection qualities for an array whose splay angles are already tailored in the direction of the genuine venue whose area look at is superimposed for the MAPP on the internet plots.

M3D specifications

Notes:

1. The low-frequency energy response belonging in the direction of the method will enhance according in the direction of the time-span belonging in the direction of the array.

2. Response will depend on loading ailments and space acoustics.

3. no cost field, measured with 1/3 octave volume resolution at 4 meters.

4. Measured with audio tracks at one meter.

5. At low/mid frequencies the two rear-facing 15-inch cone motorists create a wave the front that interacts with, and is also additive to, the wavefront made in the two front-facing cone drivers, even although slicing comfortably sonic energy directed away from your rear belonging in the direction of the cabinet. The resultantdirectional low-frequency output extends to 35 Hz, using a 25 dB standard decline in SPL at the rear of the cabinet.

6. At this frequency, the high- and low-frequency transducers create identical seem stress levels.

7. to cut back interference at short wavelengths, the two front-facing 15-inch cone motorists purpose in mixture at decrease frequencies (35Hz to 140 Hz). At mid frequencies (140 Hz to 580 Hz) only one cone driver is fed away from your crossover to sustain optimal polar and frequencyresponse characteristics.

8. energy managing is measured below AES traditional conditions: transducer driven constantly for twohours using a band-limited audio tracks signal owning a 6 dB peak-to-average ratio.

9. The motorists are coupled to some constant-directivity horn by means of a patented acoustical manifold (REM).

10. Amplifier wattage rating is dependent for the optimum unclipped burst sine-wave RMS voltage theamplifier will create in to the nominal fill impedance; on this case, 67 V rms (95 V pk) into 4 ohms.

11. AC energy cabling should be of adequate determine to ensure that below burst present conditions, cabletransmission losses do not cause the voltage to lower under specified working range in the loudspeaker.