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Note 1:
Measured 1 meter from center
of cabinet face, half-space
conditions, pink noise input,
network set to FLT, smoothed
to one-third octave. Low
frequency response
dependent on load conditions.
Note 2:
Loudspeaker driven with pink
noise.
Note 3:
“A”- weighted, unbalanced.
Acoustical – UPA-1C/M-1A System
Frequency Response
1
80 to 18,000 Hz +4 dB
-6 dB at 60 Hz and 20 kHz
Maximum SPL
2
with amplifier rated at: 250 W/8 ohms/ch 60 W/8 ohms/ch
Continuous 125 dB 120 dB
Peak 132 dB 125 dB
HF Coverage
Horizontal 80 degrees
Vertical 60 degrees
UPA-1C Loudspeaker
Transducers
Low Frequency MS-12 12-inch cone driver, 8 ohms
High Frequency MS-1401B 1.4-inch throat driver, 16 ohms
High Frequency Horn Modified radial with foam lens
HF Network Y-1PD
Function DC blocking and damped band-elimination filter
Enclosure 0.8 cu. ft. vented, multi-ply Finnish birch plywood
Finish Black textured, weather protected (optional)
Protective Grill Perforated steel screen, charcoal-grey foam covering
Connector EP-4 male (EP-5 male, Europe only)
Rigging Aircraft pan fittings, or
3
⁄8"-16 or M10 x 1.5 nut plate
Physical Dimensions 14
1
⁄2" W x 22
3
⁄8" H x 14
1
⁄2" D
Weight 67 lbs. (30 kg)
M-1A Control Electronics Unit
Input Type Balanced (active), 47K ohms
Output Type Active push-pull, will drive 600 ohms
Maximum Input/Output Level
Balanced +26 dBu
Unbalanced +20 dBu
Hum and Noise
3
-90 dBV
Dynamic Range 120 dB
Sense Inputs 10k ohms true differential, opto-isolated
Crossover Frequency 1600 Hz
Low 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 LEDs
Limit; Hi, Lo, and VHF Red LEDs
Safe Green LED
Power Supply, Positive and Negative Green LEDs
Controls
Front Panel Input level control, AC on/off switch
Preset Panel VHF control, Lo Cut switch, Safe switch and VHF switch
Connectors
Balanced Inputs/Outputs 3-pin XLR (A-3), RTS
1
⁄4" phone jacks
Subwoofer Circuit Input Unbalanced,
1
⁄4" phone jack (inserts Lo Cut,
disables Level control)
Sense Inputs Banana jacks
UPA-1C Specifications