Meyer Sound MJF-212ATM

APPENDIX B

AUDIO INPUT

Type Differential, electronically balanced

Max. common mode range ±15 V DC, clamped to earth for voltage transient protection

Connectors Female XLR input with male XLR loop output or VEAM all-in-one connector (integrates AC,

audio, and network)

Input impedance 10 kΩ differential between pins 2 and 3

Wiring Pin 1: Chassis/earth through 220 kΩ, 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

DC Blocking Differential DC blocking up to maximum common mode voltage

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

Nominal input sensitivity 0 dB V (1 V rms, 1.4 V pk) continuous is typically the onset of limiting for noise and music.

Input level Audio source must be capable of producing +20 dBV (10 V rms, 14 V pk) into 600 Ω in

order to produce maximum peak SPL over the operating bandwidth of the loudspeaker

AmPlIfIERS

Ampliﬁer type Three-channel complementary MOSFET output stages (class AB/H)

Output power 1275 W (three channels; 2 x 500 W, 1 x 275 W); 2550 W peak

Note: Ampliﬁer wattage rating based on the maximum unclipped burst sine-wave rms

voltage that the ampliﬁer will produce for at least 0.5 seconds into the nominal load

impedance.

THD, IM TIM < .02%

Load capacity 2 Ω low channels; 8 Ω high channel

Cooling Convection

AC POwER

AC power connector PowerCon with looping output or VEAM

Voltage selection Automatic, two ranges, each with high-low voltage tap (uninterrupted)

Safety agency rated

operating voltage

95 V AC – 125 V AC, 208 V AC – 235 V AC, 50/60 Hz

Turn on/turn off points 85 V AC – 134 V AC; 165 V AC – 264 V AC

Current Draw

Idle current .650 A rms (115 V AC); .310 A rms (230 V AC); .760 A rms (100 V AC)

Max. long-term continuous

current (>10 sec)

4.67 A rms (115 V AC); 2.37 A rms (230 V AC); 5.25 A rms (100 V AC)

Burst Current (<1 sec) 7.90 A rms (115 V AC); 4.10 A rms (230 V AC); 9.24 A rms (100 V AC)

Note: AC power cabling must be of sufﬁcient gauge so that under burst current RMS conditions, cable transmission

losses do not drop voltage below speciﬁed operating range at the speaker.

Ultimate Short-Term Peak

Current Draw 20.0 A pk (115 V AC); 10.0 A pk (230 V AC); 21.8 A pk (100 V AC)

Inrush Current 10 A pk (115 and 100 V AC); 18 A pk (230 V AC)

RmS NETwORK (Optional)

Equipped with two-conductor twisted-pair network, reporting all operating parameters of

ampliﬁers to system operator’s host computer.