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A
B - M3D-S
PPENDIX
Table 3. M3D-Sub Directional Subwoofer
Acoustical
Operating frequency range ±4dB 30 Hz - 88 Hz
Phase response
Maximum peak SPL
Horizontal coverage
Transducers
Low frequency
Audio Input
Type
Maximum common mode
range
Connectors
Input impedance
Wiring
CMRR
RF filter
TIM filter
Input level
Nominal input sensitivity
Amplifiers
Amplifier type
Output power
THD, IM TIM
Load capacity
Meyer Sound Laboratories Inc
D
UB
IRECTIONAL
-6 dB at 29 Hz and 95 Hz
±30˚ Hz - 95 Hz; + 90˚ at 30 Hz
>140 dB at 1 meter
Cardioid response pattern
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.
Differential, Electronic balanced"
±15 VDC, clamped to earth for voltage transient protection
Female XLR input with male XLR loop output
10k ohms differential between pins 2 and 3
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
> 50 dB, typically 80 dB (50 Hz–500 Hz)
Common mode: 425k Hz
Differential mode: 142 kHz
< 80 kHz (integral to signal processing)
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.
0 dBV (1 Vrms, 1.4 pk) continuous average is typically the onset of TPL limiting for noise and music.
Complementary power MOSFET output stages (class AB/H) based on 95 Vpk into 4 ohms
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.
< .02%
4 ohms minimum impedance each channel
S
S
UBWOOFER
PECIFICATIONS
M3D™ Line Array • 23
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