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UM-1C Specifications
Acoustical – UM-1C/M-1A System
Frequency Response
1
2
Maximum SPL
with amplifier rated at:
Continuous
Peak
HF Coverage, -6dB points
UM-1C Loudspeaker
Transducers
Low Frequency
High Frequency
High-Frequency Horn
HF Network
Function
Enclosure
Finish
Protective Grill
Connector
Rigging (optional)
Physical Dimensions
Weight
M-1A Control Electronics Unit
Input Type
Output Type
Maximum Input/Output Level
Balanced
Unbalanced
3
Hum and Noise
Dynamic Range
Sense Inputs
Electronic Crossover Frequency
Low-Frequency Delay Type
Driver Protection Circuitry
Low Frequency
High Frequency
Indicators
Sense, Hi and Lo
Limit, Hi, Lo, and VHF
Safe
Power Supply, Positive and Negative
Controls
Front Panel
Preset Panel
Connectors
Balanced Inputs/Outputs
Subwoofer Circuit Input
Sense Inputs
Power
Physical Dimensions
Weight
70-18,000 Hz +4 dB
250 W/8 ohms/ch.
60 W/8 ohms/ch.
125 dB
120 dB
135 dB
126 dB
45 degrees symmetrical
MS-12 12-inch cone driver, 8 ohms
MS-1401B 1.4-inch throat driver, 16 ohms
45 degree constant-directivity
Y-1PD
DC blocking and passive filters with alternate connection
terminal to adjust VHF response (16k peak or flat)
0.8 cu. ft. vented, multi-ply Finnish birch
Black textured
Perforated steel screen, charcoal-grey foam covering
Cannon EP-4 male, EP-5 male (Europe only)
Aircraft pan fittings or
3
⁄
"-16 nut plates
8
14" W x 14" H x 22
1
⁄
" D
2
67 lbs. (30.4 kg)
Balanced (active), 47K ohms
Active push-pull, will drive 600 ohms
+26 dBu
+20 dBu
<-90 dBV
120 dB
10k ohms true differential, opto-isolated
1600 Hz
Active all-pass
RMS limiter
RMS limiter
VHF Peak limiter
Green LEDs
Red LEDs
Green LEDs
Green LEDs
Input level control, AC on/off switch
VHF control, Lo Cut switch, Safe switch, VHF switch
1
3-pin XLR (A-3), RTS
⁄
" phone jacks
4
1
Unbalanced,
⁄
" phone jack
4
(inserts Lo Cut, disables Level control)
Banana jacks
120/240V AC, 50/60 Hz (internally switchable)
19" W x 1
3
⁄
" H x 7
3
⁄
" D Standard rack mount
4
4
8 lbs. (3.6 kg)
Note 1:
Measured 1 meter on-axis,
half-space conditions,
pink noise input, in third-
octave bands.
Note 2:
Loudspeaker driven with
weighted noise.
Note 3:
"A"- weighted, unbalanced.
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