UPL-1 & UPL-2
High Definition
Reinforcement
Loudspeakers
Operating Instructions
The Meyer Sound
UPL-1 and UPL-2 are
self-contained, high-
definition, powered
loudspeakers suitable
for a wide variety of
high quality sound
reinforcement appli-
cations. The UPL-1
and UPL-2 incorpo-
rate line-level control
electronics mounted
within a rear panel
chassis, including:
•
dual power
amplifiers for
biamplification
•
an active balanced
input circuit with
switchable sensi-
tivity (+4 dBu or
-10 dBV)
•
•
an active crossover
utilizing optimized
pole-zero filter
combinations to
achieve acoustical
transparency and
linear phase
The UPL-1 and UPL-2 are two-way systems
comprising a 10-inch cone low-frequency
driver and 1-inch high-frequency driver housed
in a vented cabinet. Both drivers are of a pro-
prietary design, and are individually selected
for maximum linearity. The high-frequency
horn driver employs a titanium dome and silk
Aligned to closely approximate true point
source radiators within their coverage area,
the UPL-1 and UPL-2 feature tightly controlled
time delay response with minimal deviation
from linear phase across the full frequency
range of their operation. Each unit is individu-
ally factory-calibrated to ensure a free-field
independent pro-
tection circuits for
each loudspeaker
driver
suspension in a patented, low distortion design frequency response that is flat within ±2 dB
(US patent number 4,152,552). It is coupled to
from 50 Hz to 18 kHz. The UPL-1 and UPL-2
each deliver 124 dB peak SPL (1 meter) with
a 90° by 40° modified radial horn in the UPL-1,
and to a 60° aspherical waveguide in the UPL-2. >100 dB dynamic range.
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
UPL-1 & UPL-2
High Definition
Reinforcement
Loudspeakers
Operating Instructions
The UPL-1 and UPL-2 are are aligned for flat fre-
quency response in free field (no adjacent bound-
ary surfaces). Placing either unit next to a wall or
floor will cause the low frequencies to be exagger-
ated, requiring equalization to correct. Always
allow at least 6 inches clearance behind the
speaker for cooling airflow.
Note. The UPL-1 and UPL-2 are not weather-
resistant, and should not be installed outdoors
where they may be exposed to the elements.
To protect from hazard of shock and compo-
nent failure, avoid rain or liquid spilled on the
amplifier chassis.
Installation
To avoid accidental disconnections, the UPL-1 and
UPL-2 cabinets are fitted with four tie-wrap an-
chors located at the four corners of the rear-
mounted amplifier chassis. Power and signal input
cables may be secured by inserting a plastic lock-
ing tie-wrap through any of these anchors, wrap-
ping it around the cable(s) and locking it in place.
The UPL-1 and UPL-2 are fitted with four 3/8"-16
nut plates, two each on the enclosure top and
bottom. These may be used to attach the enclo-
sures to cables for hanging, or to a suitable sup-
port plate for mounting on a loudspeaker stand.
Each rigging nut plate is designed to support the
weight of a single cabinet.
The calibration port is for factory use only. Do not
apply external voltages to any of the connector
pins.
The UPL-1 and UPL-2 are not user-serviceable.
Refer service to an authorized Meyer Sound Ser-
vice Center or to Meyer Sound.
Calibration Port
Physical
8.88"
Dimensions
9.20"
16.42"
15.54"
8.00"
14.00"
14.00"
20.75"
20.75"
13.20"
8.50"
2.0"
UPL-2
UPL-1
14.00"
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
UPL-1 & UPL-2
High Definition
Reinforcement
Loudspeakers
Operating Instructions
Acoustical
Specifications
Frequency Response1
±2 dB from 50 Hz to 18 kHz2
-3 dB at 32 Hz and 20 kHz
+60°, -0° from 120 Hz to 18 kHz
124 dB peak @ 1 meter
> 100 dB
Phase Response1
Maximum SPL
Signal-to-Noise Ratio
Coverage Angle
UPL-1
90° horizontal by 40° vertical
60° horizontal and vertical
UPL-2
Electrical
Input Type
Electronically balanced, 10k ohms impedance
Accepts either +4 dBu or -10 dBV, switchable
Complementary power MOSFET output stages
Notes:
Nominal Input Level
Amplifier Type
Power Output
Low Frequency
High Frequency
THD, IM, TIM
Crossover
1. Subject to room loading.
Specified for 8 feet actual
distance between loud-
speaker cabinet and a single
boundary surface, measured
with one-third octave fre-
quency resolution in fixed
ISO bands.
200 watts burst capability
100 watts burst capability
< .02 %
Optimized pole-zero filter combinations to complement
transducer response and to achieve acoustical transpar-
ency and flat phase3
Voltage selector switch for 100/120/220/240 VAC, 50 or
60 Hz (accepts voltages from 90 to 260 VAC), 175 W
maximum
Power
2. Specified with grill removed.
Response tolerance 3 dB
with grill screen and foam in
place.
±
Physical
Input Connector
Power Inlet
Driver Complement
Low Frequency
High Frequency
Enclosure
XLR (A-3) female
3-pin IEC male receptacle
3. U.S. patent #5,185,801 (addi-
tional patent pending).
10" diameter cone (2" voice coil)
1" titanium dome horn driver (1" voice coil)4
1.6 cu. ft. vented, multi-ply Finnish birch
Black textured
14" W x 20 3⁄4" H x 14" D (+ 2 1⁄2" additional depth for
amplifier chassis and 2" for grill frame with foam)
70 lbs (32 kg)
4. U.S. patent #4,152,552.
Unless otherwise specified, all
acoustical measurements are
performed at 1 meter from front
baffle on high-frequency horn
axis. Acoustical decibels are
specified re 20 µPa.
Finish
Dimensions
Weight
Protective Grill
Rigging
Perforated metal screen, grey foam covering
3
/
8"-16 nut plates, top and bottom
Maximum
Continuous SPL
by Frequency
16k
8k
4k
2k
1k
500
250
125
62
30
90
100
110
120
Continuous SPL (dB)
05.553.006.01 B
© Meyer Sound, 1995.
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
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