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Acoustical – MSL-3A/M-3A System
Frequency response
1
75-18k Hz ±4 dB
Maximum SPL
2
Continuous 130 dB
Peak 135 dB
HF Coverage
Horizontal 70 degrees
Vertical 60 degrees
Acoustical Crossover Frequency 800 Hz
MSL-3A Loudspeaker
Transducers
Low Frequency (2) MS-12 12-inch cone drivers, 8 ohms per driver
High Frequency MS-2001A 2-inch throat (4" diaphragm) driver, 12 ohms
High-Frequency Horn 70-degree modified radial
HF DC Protection 20 µF Polypropylene capacitor
Enclosure Vented, horn loaded, multi-ply Finnish birch
Finish Black textured, charcoal-grey carpet (optional)
or black weather protected (optional)
Physical Dimensions 21
1
⁄4" W x 56
3
⁄4" H x 30" D
Weight 241 lbs. (109.3 kg)
Protective Grill Hex perforated metal screen, damped,
charcoal-grey foam covering
Connector EP-4 male, EP-5 male (Europe only),
Pyle National (optional)
Rigging (optional) Aircraft pan fittings, 600 lbs. safe working load each
M-3A Control Electronic Unit
Input Type
3
Balanced ISO-Input,
™
10k ohms
Output Type Active, push-pull, 200 ohms output impedance
Maximum Input Level
Balanced +23 dBu
Unbalanced +23 dBu
Maximum Output Level
4
Balanced +26 dBu
Unbalanced +20 dBu
Hum and Noise
5
-90 dBV
Dynamic Range
6
>110 dB
Sense Inputs 10K ohms true differential, opto-isolated
Electrical Crossover Frequency 800 Hz
High Frequency Delay Type Active all-pass
Driver Protection Circuitry
Low Frequency RMS limiter
High Frequency RMS limiter
VHF Peak limiter
Indicators
Sense; Hi and Lo Green/ Red LEDs
Limit; Hi, Lo, and VHF Red LEDs
Safe Green LED
Power Green/Red LEDs
Controls
Front Panel Input attenuator, AC power switch
Preset Panel Lo Cut switch, Safe switch, HF EQ Switch
VHF Var/Cal switch, VHF control
MSL-3A Specifications
Note 1:
Measured 1 meter on-axis,
half-space conditions,
pink noise input, in third-
octave bands.
Note 2:
Loudspeaker driven with “A”
weighted noise (peak-to-RMS
ratio
≈
12␣dB), with power
amplifier rated at 400W per
channel at 4 ohms.
Note 3:
ISO™ Input: Pins 1, 2 and 3
are transformer-isolated, and
shell is connected to chassis/
AC earth ground. Pin 3 positive
for positive pressure output.
Note 4:
800 Hz (worst case frequency
both channels), <0.1% THD.
Note 5:
“A”-weighted, unbalanced.
Note 6:
“A”-weighted noise floor to
maximum output at 800 Hz.