APPENDIX B

M2D-SUB SPECIFICATIONS

ACOUSTICAL

Note: The low-frequency power response of the system will increase according to the length of the array.

Operating frequency range

28 Hz - 160 Hz

 

 

 

 

Note: Recommended maximum operating frequency range. Response depends upon

 

loading conditions and room acoustics.

 

 

 

Frequency response

30 Hz - 140 Hz ±4 dB

 

 

 

 

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

 

 

 

Phase response

40 Hz to 100 Hz ±45°

 

 

 

Maximum peak SPL

138 dB

 

 

 

 

Note: Measured with music at 1 meter.

 

 

 

Dynamic range

>110 dB

 

 

 

Horizontal coverage

360°

 

 

 

 

Vertical coverage

Varies, depending on array length and configuration.

 

 

 

TRANSDUCERS

 

 

 

 

 

Low frequency

Two 15" cone drivers with neodymium magnets

 

Nominal impedance: 4 Ω

 

Voice coil size: 4"

 

Power-handling capability: 1200 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.

 

 

 

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

None on input; DC blocked through signal processing

 

 

 

CMRR

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

 

 

 

RF filter

Common mode: 425 kHz; Differential mode: 142 kHz

 

 

 

TIM filter

<80 kHz, integral to signal processing

 

 

 

Nominal input sensitivity

0 dB V (1 V rms, 1.4 pk) continuous is typically the onset of limiting for pink noise and

 

music.

 

 

 

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