M2D-Sub specifications

Acoustical1

 

 

Operating Frequency Range2

 

 

 

 

 

 

Frequency Response3

30 Hz - 140 Hz ±4 dB

 

 

Phase Response

40 Hz - 100 Hz ±45°

 

 

Maximum Peak SPL4

138 dB

 

 

Signal to Noise Ratio

>110 dB

 

Coverage

 

 

 

 

Horizontal Coverage

360° Horizontal

 

 

Vertical Coverage

Varies, depending on array length and configuration

Transducers

 

 

 

 

Low Frequency

Two 15" cone drivers with neodymium magnets

 

 

 

Nominal impedance: 4

 

 

 

Voice coil size: 4"

 

 

 

Power-handling capability: 1200 W (AES)5

Audio Input

 

 

Notes

1. The low-frequency power response of

the system will increase according to the

length of the array

2. Recommended maximum operating

frequency range. Response depends on

loading conditions and room acoustics

3. Free field, measured with 1/3 octave

frequency resolution at 4 meters

4. Measured with music at 1 meter

5. Power handling is measured under AES

standard conditions: transducer driven

continuously for twohours with a band-

limited noise signal having a 6 dB peak-

to-average ratio.

Type

Maximum Common Mode Range

Connectors

Input Impedance

Wiring

DC Blocking

CMRR

RF Filter

TIM Filter

Nominal Input Sensitivity

Input Level

Differential, electronically balanced

±15 V DC, clamped to earth for voltage transient protection

Female XLR input with male XLR loop outputor VEAM all-in-one

connector (integrates AC, audio and network)

10 k differential between pins 2 and 3

Pin 1: Chassis/earth through 220 k , 1000 pF, 15 V clamp network to

provide virtual ground lift at audiofrequencies

Pin 2: Signal +

Pin 3: Signal -

Case: Earth ground and chassis

None on input; DC blocked through signal processing

>50 dB, typically 80 dB (50 Hz - 500 Hz)

Common mode: 425 kHz; Differential mode: 142 kHz

Integral to signal processing (<80 kHz)

0 dBV (1 V rms, 1.4 V pk) continuous is typically the onset of limiting for

pink noise and music

Audio source must be capable of producing a minimum of 20 dBV

(10 V rms, 14 V pk) into 600 inorder to produce maximum peak SPL

6. Amplifier wattage rating is based on

the maximum unclipped burst sine-wave

rms voltage that theamplifier will produce

into the nominal load impedance. Both

channels: 67 V rms (95 V pk) into 4 ohms

 

over the operating bandwidth of the loudspeaker

Amplifiers

 

 

 

Type

Two channel complementary MOSFET output stages (class AB/H)

Output Power6

2250 W

 

 

THD, IM, TIM

<.02 %

 

 

Load Capacity

4 each channel

 

Cooling

Forced air cooling, two fans (one ultrahigh-speed reserve fan)

AC Power

 

 

 

Connector

PowerCon or VEAM

 

Automatic Voltage Selection

Automatic, two ranges, each with high-low voltage tap (uninterrupted)

Safety Agency Rated Operating Range

95 - 125 V AC; 208 - 235 V AC; 50/60 Hz

Turn-on and Turn-off Points

85 - 134 V AC; 165 - 264 V AC; 50/60 Hz

Current Draw:

 

 

 

Idle Current

0.64 A rms (115 V AC); 0.32 A rms (230 V AC); 0.85 A rms (100 V AC)

Max Long-Term Continuous Current (>10 sec)

8.8 A

(115 V AC); 4.4 A

(230 V AC); 10 A rms (100 V AC)

Burst Current (<1 sec)

19 A rms (115 V AC); 9.5 A rms (230 V AC); 22 A rms (100 V AC)

Ultimate Short-Term Peak Current Draw

39 A pk (115 V AC); 20 A pk (230 V AC); 45 A pk (100 V AC)

Inrush Current

7 A pk (115 V AC and 230 V AC); 10 A pk (100 V AC)

RMS Network

Equipped for two conductor twisted-pair network, reporting all operating parameters ofamplifiers to system operator’s host computer.

M2D-SUB - 04.114.030.01

Copyright © 2004

Meyer Sound Laboratories Inc. All rights reserved

meyer sound laboratories inc

2832 San Pablo Avenue Berkeley, CA 94702

T:+1 510 486.1166

F:+1 510 486.8356

techsupport@meyersound.com

www.meyersound.com

architect specification

The loudspeaker shall be a self-powered, sub-bass system which may be deployed as either a flown or a ground-stacked unit. The transducers shall consist of two 15-inch cone drivers (4-inch voice coil) each rated to handle 1200 AES* watts.

The loudspeaker shall incorporate internal processing electronics and a two-channel amplifier. Each amplifier channel shall be class AB/H with complementary MOSFET output stages. Burst capability shall be 2250 watts total with nominal 4-ohm resistive load. Distortion (THD, IM, TIM) shall not exceed 0.02%. Protection circuits shall include TruPower limiting. The audio input shall be electronically balanced with a 10 kOhm impedance and accept a nominal 0 dBV (1 V rms) signal (20 dBV to produce maximum SPL). Connectors shall be XLR (A-3) type male and female or VEAM all-in-one. RF filtering

shall be provided, and CMRR shall be greater than 50 dB (50 - 500 Hz).

Performance specifications for a typical production unit shall be as follows, measured at 1/3 octave resolution: Operating frequency range shall be 28 Hz to 160 Hz. Phase response shall be ±45° from 40 Hz to 100 Hz. Maximum SPL shall be 138 dB at 1 meter.

The internal power supply shall perform automatic voltage selection, EMI filtering, soft current turn-on and surge suppression. Powering requirements shall be nominal 100 V, 110 V or 230 V AC line current at 50 Hz or 60 Hz. UL and CE operating voltage ranges shall be 95 to 125 V AC and 208 to 235 V AC. Current draw during burst shall be 19 A at 115 V AC and 9.5 A at 230 V AC. Current inrush during soft turn-on shall not exceed

7 A at 115 V AC. AC power connectors shall be

PowerCon or VEAM.

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

All loudspeaker components shall be mounted in a multi-ply hardwood enclosure with a black textured finish. Dimensions shall be 39.00" wide x 24.00" high x 17.50" deep (991 mm x 612 mm x 445 mm). Weight shall be 173 lbs (78.47 kg).

The loudspeaker shall be the Meyer Sound M2D-Sub.

*Driven continuously for two hours with band-limited noise

signal having a 6 dB peak-average ratio