Meyer Sound M3D - Manual (Page 27)

Meyer Sound Laboratories Inc M3D™ Line Array • 21
Audio input
Type Differential, electronic balanced
Maximum common mode
range
±15 V DC, 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: 425 kHz
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 Vpk) 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 is typically the onset of TPL limiting for noise and music.
Amplifiers
Amplifier type Complementary power MOSFET output stages (class AB/H) based on 95 Vpk into 4 ohms
Output power 4500 watts (1125 watts/channel, xfour 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 Vpk) into 4 ohms.
THD, IM TIM < .02%
Load capacity 4 ohms minimum impedance each channel
Cooling Forced air cooling, four fans total (two ultra high-speed reserve fans)
AC Power
AC power connector 250VAC NEMA L6-20 (twistlock) inlet or IEC 309 male inlet
Optional VEAM connector (integrates AC, audio and network)
Voltage selection Automatic, two ranges, each with high-low voltage tap (uninterrupted)
Safety agency rated
operating voltage
95 VAC–125 VAC, 208 VAC to 235 VAC, 50/60 Hz
Turn on/turn off points 85 VAC–134 VAC; 165 VAC - 264 VAC
Current Draw
Idle current 1.2A RMS (115 VAC)
0.6A RMS (230 VAC)
1.3A RMS (100 VAC)
Max. long-term continuous
current (>10 sec)
18 A RMS (115 V)
9 A RMS (230 V)
20 A RMS (280 V)
Table 2. M3D Line Array Specifications (continued)