Meyer Sound Car Speaker UPL 1 User Manual

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 34" H x 14" D (+ 2 12" 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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