Meyer Sound M3D APPENDIX B - M3D-SUB DIRECTIONAL SUBWOOFER SPECIFICATIONS

Meyer Sound Laboratories Inc M3D

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APPENDIX B - M3D-SUB DIRECTIONAL SUBWOOFER SPECIFICATIONS

Operating frequency range ±4dB 30 Hz - 88 Hz

-6 dB at 29 Hz and 95 Hz

Phase response ±30˚ Hz - 95 Hz; + 90˚ at 30 Hz

Maximum peak SPL >140 dB at 1 meter

Horizontal coverage Cardioid response pattern

Low frequency Two each 18 inch diameter cone drivers

Nominal impedance: 4 ohms Voice coil size: 4 inches

Power-handling capability: 1200 W

Two 15" cone drivers

Nominal impedance: 8 ohms

Coil size: 3 inches

Power-handling capability: 600 W

Note: Power handling is measured under AES standard conditions: transducer driven continuously for two

hours with a band-limited noise signal (125 Hz to 8 kHz) having a 6 dB peak-to-average ratio.

Type Differential, Electronic balanced”

Maximum common mode

range

±15 VDC, clamped to earth for voltage transient protection

Connectors Female XLR input with male XLR loop output

Input impedance 10k ohms differential between pins 2 and 3

Wiring Pin 1: Chassis/earth through 220k ohm, 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

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

RF filter Common mode: 425k Hz

Differential mode: 142 kHz

TIM filter < 80 kHz (integral to signal processing)

Input level Audio source must be capable of producing a minimum of 20 dBV (10 Vrms, 14 V pk) into 600 ohms in

order to produce maximum peak SPL over the operating bandwidth of the speaker.

Nominal input sensitivity 0 dBV (1 Vrms, 1.4 pk) continuous average is typically the onset of TPL limiting for noise and music.

Amplifier type Complementary power MOSFET output stages (class AB/H) based on 95 Vpk into 4 ohms

Output power 4500 watts (1125 watts/channel, four channels)

Note: 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 Vrms (95 V pk) into 4 ohms.

THD, IM TIM < .02%

Load capacity 4 ohms minimum impedance each channel