MSL-2A Specifications
Acoustical – MSL-2A/S-1 System
Frequency Response
1
40 Hz to 18 kHz +4 dB
Maximum SPL
2
Continuous 130 dB
Peak 139 dB
Maximum Peak (Music Signal) 144 dB
HF Coverage, -6dB points 70° horizontal x 60° vertical
Acoustical Crossover Frequency 900 Hz
MSL-2A Loudspeaker
Transducers
Low Frequency MS-15 15-inch cone driver, 8 ohms
High Frequency MS-2001A 2-inch throat compression driver, 8 ohms
High-Frequency Horn 70 degree modified radial
HF Network DC blocking capacitor
Enclosure 2.3 cu. ft. vented, multi-ply Finnish birch plywood
Finish Black textured
Protective Grill Hex perforated metal, powder coated, charcoal-
grey foam covering
Connector EP-4 male (EP-5 male, Europe only)
Rigging (optional) Aircraft pan fittings,
3
⁄8"-16 or M10 x 1.5 nut plates
Physical Dimensions 21
1
⁄4" W x 24
1
⁄4" H x 18
1
/
4
" D
Weight 82 lbs. (37 kg)
S-1 Control Electronics Unit
Input Type
3
Active balanced ISO™ input, 10k ohms, 5k ohms per leg
Output Type Active push-pull, will drive 600 ohms
Maximum Input/Output Level
Balanced + 26 dBu
Unbalanced +20 dBu
Hum and Noise
4
<-90 dBV
Dynamic Range 108 dB
Sense Inputs 100k ohms true differential
Low-Frequency Delay Type Active all-pass
Driver Protection Circuitry
Low Frequency RMS limiter and excursion limiter
High Frequency RMS limiter and excursion limiter
VHF Peak limiter
Indicators
Sense/Gain Detect, Hi and Lo Red /Green LEDs
Limit, Hi, Lo, and VHF Red LEDs
Safe Green LED
Power Supply Green LED
Controls
Front Panel Input attenuator, AC power switch
Preset Panel Lo Cut switch, Safe switch, VHF switch, VHF control
Connectors
Balanced Inputs/Outputs 3-pin XLR (A-3)
Sense Inputs Banana jacks
Power 90-125/180-250V AC, 50/60 Hz (rear-panel switchable)
Physical Dimensions 19" W x 1
3
⁄4" H x 7
3
⁄4" D standard rack mount
Weight 8 lbs. (3.6 kg)
Note 1:
Measured 1 meter on-axis to
high horn, half-space con–
ditions, pink noise input, in
third-octave bands.
Note 2:
Loudspeaker driven with “A”
weighted noise (peak-to-RMS
ratio

≈

12 dB), with amplifier
rated at 600 W/channel at
8␣ohms. The MSL-2A will ac-
commodate amplifiers capable
of output levels up to

±

140 vpk.
Note 3:
ISO™ input: Pins 1, 2 and 3 are
transformer isolated, shell is
connected to chassis/AC mains
ground.
Note 4:
“A”- weighted, unbalanced.