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APPENDIX B
ACOUSTICAL
Note: Recommended maximum operating frequency range. Response depends on loading conditions and room
acoustics.
Operating frequency range 55 Hz – 18 kHz
Note: Recommended maximum operating frequency range. Response depends on loading
conditions and room acoustics.
Frequency response 60 Hz – 16 kHz ±4 dB
Note: Half-space loading measured with 1/3-octave frequency resolution at 4 meters.
Phase response 500 Hz – 16 kHz ±45°
Maximum peak SPL 139 dB
Note: Measured with music, half-space loading, referred to 1 meter.
Dynamic range >110 dB
Coverage 50° symmetrical
Acoustical crossover 1600 Hz
Note: At this frequency, the transducers produce equal sound pressure levels.
TRANSDUCERS
Low/low-mid frequency Two high-power 12" cone drivers with neodymium magnets
Nominal impedance: 2 Ω
Voice coil size: 4"
Power handling capability: 1200 W (AES)
Note: Power handling is measured under AES standard conditions: transducers driven
continuously for two hours with band limited noise signal having a 6 dB peak-average ratio.
High frequency 4" compression driver
Nominal impedance: 8 Ω
Voice coil size: 4"
Diaphragm size: 4"
Exit size: 1.5"
Power handling capability: 250 W (AES)
Note: Power handling is measured under AES standard conditions: transducers driven
continuously for two hours with band limited noise signal having a 6 dB peak-average ratio.
APPENDIX B: MJF-212A SPECIFICATIONS AND DIMENSIONAL DRAWINGS
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