Meyer Sound M1D - Manual (Page 27)

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APPENDIX B
APPENDIX B
M1D 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 - 18 kHz
Note: Recommended maximum operating frequency range. Response depends upon
loading conditions and room acoustics.
Frequency response 75 Hz - 15 kHz ±4 dB
Note: Free field, measured with 1/3 octave frequency resolution at 4 meters.
Phase response 800 Hz - 12 kHz ±45°
Maximum peak SPL 125 dB at 1 m
Note: Measured with music at 1 meter.
Dynamic range >110 dB
Horizontal coverage 100°
Vertical coverage Varies, depending on array length and configuration; for a single loudspeaker, 10° minimum.
Acoustical crossover 1900 Hz
Note: At these frequencies, the transducers produce equal sound pressure levels.
TRANSDUCERS
Low frequency
Two 5" cone drivers
Nominal impedance: 8 Ω
Voice coil size: 1"
Power-handling capability: 200 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 5" drivers work in combination at low frequencies (60 Hz
– 1000 Hz). At mid frequencies (1000 Hz – 1900 Hz) only one cone driver is fed from the crossover to maintain optimal
polar and frequency response characteristics.
High frequency
Three 0.75" metal dome tweeters with neodymium magnets
Nominal impedance: 8 Ω
Voice coil size: 20 mm
Power-handling capability: 15 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 three drivers are coupled to a constant-directivity horn.
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
Input impedance 10 kΩ differential between pins 2 and 3
Wiring Pin 1: Chassis/earth through 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)
RF filter Common mode: 425 kHz; Differential mode: 142 kHz
TIM filter <80 kHz, integral to signal processing