M3D Line Array Loudspeaker

(For compete specifications, please download the datasheet.)

Operating Frequency Range(1)	35 Hz - 18 kHz
Frequency Response(2)	42 Hz - 16 kHz ±4 dB
Maximum Peak SPL(3)	145 dB
Coverage: Horizontal	Low Frequency: Cardioid, with active pattern control High Frequency: 90°
Coverage: Vertical	Varies, depending on array length and configuration
Transducers: Low/Mid Frequency (front)	Two 15" cone drivers with neodymium magnets(4) Nominal impedance: 4 Ω Voice coil size: 4" Power-handling capability: 1200 W(5)
Transducers: Low/Mid Frequency (rear) (6)	Two 15" cone drivers Nominal impedance: 8 Ω Voice coil size: 3" Power-handling capability: 600 W(5)
Transducers: High Frequency	Two 4" diaphragm compression drivers Nominal impedance: 8 Ω Voice coil size: 4" Diaphragm size: 4" Exit size: 1.5" Power-handling capability: 250 W(5)
Amplifier Power	4500 W (1125 W/channel, four channels)(7)
Automatic Voltage Selection (Self-Powered)	85 - 134 V AC; 165 - 264 V AC; 50/60 Hz
Physical Dimensions	54.00" w x 20.00" h x 30.50" d (1372 mm x 508 mm x 775 mm)
Weight	415 lbs (188.25 kg); shipping: 500 lbs (226.80 kg)

NOTES:

Response depends on loading conditions and room acoustics.
Measured with 1/3 octave frequency resolution at 4 meters.
Measured with music at 1 meter
To eliminate interference at short wavelengths, the two front-facing 15-inch cone drivers work in combination at low frequencies (35 Hz to 140 Hz). At mid frequencies (140 Hz to 580 Hz) only one cone driver is fed from the crossover to maintain optimal polar and frequency response characteristics.
Power handling is measured under AES standard conditions: transducer driven continuously for two hours with a band-limited noise signal having a 6 dB peak-to-average ratio.
At low/mid frequencies the two rear-facing 15-inch cone drivers produce a wave front that interacts with, and is additive to, the wave front produced by the two front-facing cone drivers, while reducing sonic energy directed from the rear of the cabinet. The resultant directional low-frequency output extends to 35 Hz, with a 25 dB average reduction in SPL behind the cabinet.
Amplifier wattage rating is based on the maximum unclipped burst sine-wave rms voltage the amplifier will produce into the nominal load impedance; in this case, 67 V rms (95 V pk) into 4 ohms.