Meyer Sound UltraSeries UPA-2C User manual

UP
A-2C
UltraSeries™
Loudspeaker
Designed for a wide variety of sound
reinforcement applications, the compact,
arrayable UPA-2C allows for controlled
coverage of wide areas in theater, club and
concert sound reinforcement. The powerful
loudspeaker delivers high sound pressure
levels with extremely low distortion, for
maximum intelligibility and fidelity.
The biamplified UPA-2C consists of
a␣proprietary 12-inch low-frequency cone
driver in a vented enclosure with a 45-
degree high-frequency aspherical
waveguide and driver. This configuration
offers exceptional directional control for
extremely smooth arraying characteristics,
and is particularly advantageous in
reverberant environments where reflected
energy must be minimized.
The rugged, multiple-ply hardwood
cabinet enclosure is fitted with handles
and, optionally, aircraft-style rigging pan
fittings or threaded nut plates.
The UPA-2C requires a high-quality
professional stereo power amplifier capable
of delivering 350 watts/channel continu-
ously into 8 ohms, with a signal voltage
gain of 10␣dB (minimum) to 30 dB (maxi-
mum).
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
[phone]
FAX [phone]
— 12
–
–
— 9
–
–
— 6
–
–
— 3
–
–
— 0
Inches
Features
Efficient high power
Ultra-low distortion
Compact and versatile
High clarity and coherence
Exceptional directional control
Arrayable
Rugged
Applications
Sound reinforcement
Live music clubs
Side fill in concert reinforcement
Theater PA systems
High-power announcing
Paging indoors/outdoors

Acoustical – UPA-2C/M-1A System
Frequency Response
1
80 to 18,000 Hz +4 dB
-6 dB at 60 Hz and 18 kHz
Maximum SPL
2
Continuous 125 dB
Peak 132 dB
Peak Music 132 dB
HF Coverage
Horizontal 45 degrees
Vertical 45 degrees
UPA-2C Loudspeaker
Transducers
Low Frequency MS-12 12-inch cone driver, 8 ohms nominal
High Frequency MS-1401B 1.4-inch throat driver, 16 ohms nominal
High Frequency Horn Aspherical waveguide
HF Network Y-1PD
Function DC blocking and damped band-elimination filter
Enclosure 0.8 cu. ft. vented, multi-ply Finnish birch
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-2C Specifications
Note 1:
Measured 1 meter from center
of cabinet face, half-space
conditions, pink noise input,
network set to FLT, with one-
third octave frequency resolu-
tion on ISO center frequen-
cies. Low frequency response
dependent on load conditions.
Note 2:
Loudspeaker driven with
amplifier rated at 350 W/ch at
8 ohms, pink noise input.
Note 3:
“A”- weighted, unbalanced.

Power 120/240V AC, 50/60 Hz (internally switchable)
Physical Dimensions 19" W x 1
3
⁄4" H x 7
3
⁄4" D Standard rack mount
Weight 8 lbs. (3.6 kg)
The UPA-2C loudspeaker operates as a system with
the M-1A Control Electronics Unit (one per channel).
Optimized for the UPA series and pre-aligned at the
factory, the M-1A contains frequency response and
phase response alignment circuitry, and Meyer Sound's
exclusive SpeakerSense ™ driver protection circuitry,
incorporating both peak and RMS signal limiting.
A single-channel device operating at line level, the
M-1A is intended to be the final component in the signal
chain before the power amplifier. Its factory-calibrated
SpeakerSense circuitry protects the UPA-2C loudspeaker
components from damage due to overheating under
high power conditions. This unique circuit continuously
monitors the power applied to the UPA-2C drivers, and
individually limits the high-frequency and low-fre-
quency outputs when the safe operating limits of the
drivers are exceeded. Until the onset of overload, the
SpeakerSense circuitry has no effect on the signal.
Also provided is a switch-selectable Safe function,
which widens the safety margin of the system and is
intended to be used when extended periods of overload
are anticipated. The Safe switch and other setup controls
are located behind a cover plate on the M-1A front panel,
providing a means of securing the system installer's
presets.
To enhance the effectiveness of the UPA-2C, the M-1A
incorporates sliding filters which band-limit the system
response under full-power conditions. This has the effect
of discriminating for vocal information in the signal to
increase clarity, and is particularly useful when sound
pressure levels are high. It is recommended that subwoof-
ers be used with the system if it must pass the full audio
frequency range at all times. The preferred choice of
subwoofer for the UPA-2C is the Meyer Sound USW-1.
M-1A Control Electronics Unit
UltraSeries™ M-1A Power
Sense Limit
Safe
Adj
Lo Cut
Cal
VHF
Var
Safe ∞
20
10 843
2
1
0
Attn dB
5
6
+ -
Lo
Hi
VHF

Meyer Sound Laboratories has
devoted itself to designing,
manufacturing, and refining
components that deliver superb
sonic reproduction. Every part of
every component is designed and
built to exacting specifications and
undergoes rigorous, comprehen-
sive testing in the laboratories.
Research remains an integral,
driving force behind all
production. Meyer strives for
sound quality that is predictable
and neutral over an extended
lifetime and across an extended
range.
Sound
engineering
for the art
and science
of sound.
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
( 510 ) 486-1166
FAX ( 510 ) 486-8356
Architectural and
Engineering Specifications
The compact sound reinforcement
speaker system shall be a two-way type
with a 12" low-frequency loudspeaker front-
mounted in a ducted bass-reflex hardwood
plywood enclosure with a compression
driver mounted on a high-frequency horn
which has a 1.4" throat, and a separate
Control Electronics Unit.
The Control Electronics Unit shall
contain a power supply capable of opera-
ting from a 120/240V AC, 50/60 Hz line,
electronic crossover circuitry, electronic
delay for the phase alignment of the
low-frequency speaker, low- and high-
frequency sliding filters which automati-
cally activate under high power conditions,
RMS limiters which protect the speakers
from over-heating, equalization circuitry,
active balanced input, indicator LED’s
for power on and limiters. Total harmonic
distortion shall be less than .1%. “A”-
weighted noise level shall be at least 110 dB
below maximum rated output of +26 dBu.
The speaker system, its companion
Control Electronics Unit, and a power
amplifier rated at 350 watts/channel into
8 ohms shall meet the following perfor-
mance criteria: Frequency response, 80 Hz
to 18 kHz plus or minus 4 dB measured
with
1
⁄ 3 octave pink noise, 1 meter on axis;
output of 125 dB SPL measured 1 meter
on axis with peaks of 132 dB SPL driven
with “A”-weighted noise. Total harmonic
distortion shall be less than 1% at 110 dB
SPL and 3% at 120 dB SPL one meter on
axis. Distribution pattern, 45 degrees
horizontal and vertical.
Speaker dimensions shall be 14
1
⁄ 2 " W x
22
3
⁄ 8 " H x 14
1
⁄ 2 " D, weight 67 lbs (30 kg).
Control Electronics Unit dimensions
shall be 19" W x 1
3
⁄ 4 " H x 7
3
⁄ 4 " D, weight
8␣lbs (3.6 kg).
The speaker system shall be the Meyer
Sound UPA-2C. The Control Electronics
Unit shall be the Meyer Sound M-1A.
© 1995, Meyer Sound 04.028.023.01 A
UPA-2C/M-1A
Physical Dimensions Maximum Output
22.38"
10.63"
14.50"
12.75"
14.50"
2.63"
7.13"
7.50"
C
Frequency (Hz)
Continuous SPL (dB)
80 100 120 140
62
125
250
500
1k
2k
4k
8k
16k