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APPENDIX B
31
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 eld, 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 conguration.
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 lter Common mode: 425 kHz; Differential mode: 142 kHz
TIM lter <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.