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 room acoustics.

 

 

Frequency response

70 Hz - 14 kHz ±4 dB

 

 

 

Note: Free field, measured with 1/3 octave frequency resolution at 4 meters.

 

 

Phase response

650 Hz - 12 kHz ±45°

 

 

Maximum peak SPL

136 dB

 

 

 

Note: Measured with music at 1 meter.

 

 

Dynamic range

>110 dB

 

 

Horizontal coverage

90°

 

 

Vertical coverage

Varies, depending on array length and configuration.

 

 

Acoustical crossover

575 Hz

 

 

 

Note: At this frequency, the mid- and high-frequency transducers produce equal sound

 

pressure levels.

 

 

TRANSDUCERS

 

 

 

Low frequency

Two 10" cone drivers with neodymium magnets

 

Nominal impedance: 4 Ω

 

Voice coil size: 2"

 

Power-handling capability: 400 W (AES)

 

 

 

Note: Power handling is measured under AES standard conditions: transducer driven

 

continuously for two hours with band limited noise signal having a 6 dB peak-average ratio.

 

 

Note: To eliminate interference at short wavelengths, the two 10" drivers work in combination at low frequencies (60 Hz

–350 Hz). At mid frequencies (350 Hz – 575 Hz) only one cone driver is fed from the crossover to maintain optimal polar and frequency response characteristics.

High frequency

One 4" diaphragm compression driver

 

Nominal impedance: 8 Ω

 

Voice coil size: 4"

 

Exit size: 1.5"

 

Power-handling capability: 250 W (AES)

 

Note: Power handling is measured under AES standard conditions: transducer driven

 

continuously for two hours with band limited noise signal having a 6 dB peak-average ratio.

 

 

Note: The driver is coupled to a constant-directivity horn through a proprietary acoustical manifold (REM).

AUDIO INPUT

Type

Differential, electronically balanced

 

 

Max. common mode range

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

 

 

Connectors

Female XLR input with male XLR loop output or VEAM all-in-one connector (integrates AC,

 

audio and network)

 

 

Input impedance

10 kΩ differential between pins 2 and 3

 

 

Wiring

Pin 1: Chassis/earth through a 220 kΩ, 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

 

 

DC Blocking

Differential DC blocking up to max common mode voltage

 

 

CMRR

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

 

 

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