Black Box Secure Device Servers Marine Safety Devices User Manual

Operating Instructions
UM-P Series
UM-1P and UM-100P
Self-Powered Loudspeakers
(Serial Numbers 981000 and above)
Copyright © 1997
Meyer Sound Laboratories, Inc.
All rights reserved
Part #: Rev B
Introduction ..........................................................
AC Power .............................................................
The Modular Rear Panel .....................................
Amplification, Limiting, and Cooling System ....
Example Application ...........................................
Verifying Driver Polarity .................................... 8
Troubleshooting ................................................ 8
Safety Summary .............................................. 11
Rear Panel Connectors .................................... 12
Dimensions ...................................................... 12
Symbols Used
These symbols indicate important safety or operating features in this booklet and on the chassis.
Dangerous voltages:
risk of electric shock
Important operating
Frame or chassis
Protective earth ground
Pour indiquer les risques
résultant de tensions
Pour indequer important
Masse, châssis
Terre de protection
Zu die gefahren von
gefährliche spanning zeigen
Zu wichtige betriebsanweisung und unterhaltsanweisung zeigen
Rahmen oder chassis
Die schutzerde
Para indicar azares provengo
de peligroso voltajes
Para indicar importante
funcionar y mantenimiento
Armadura o chassis
Tierra proteccionista
Declaration of Conformity According to ISO/IEC Guide and EN 45014
The Manufacturer:
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, California 94702-2204, USA
Conforms to the following Product Specifications:
EN60065: 1994
EN55103-1 emmission
EN55103-2 immunity
The product herewith complies with the requirements
of the Low Voltage Directive 73 / 23 / EEC and
the EMC Directive 89 / 336 / EEC.
Office of Quality Manager
Berkeley, California USA
December 23, 1997
Declares that the product:
Product Name: UM-1P, UM-100P
Product Options: All
Environmental Specifications for
Meyer Sound Electronics Products:
Operating temperature:
0o to + 45o
Nonoperating temperature:
< -40o C or > +75o C
to 95% at 35
Operating Altitude:
to 4600 m (15,000 ft)
Nonoperating Altitude:
to 6300 m (25,000 ft)
30g 11 msec half-sine
on each of 6 sides
10 Hz to 55 Hz (0.010m
peak-to-peak excursion)
Made by Meyer Sound Laboratories
Berkeley, California USA
European Office:
Meyer Sound Lab. GmbH
Carl Zeiss Strasse 13
56751 Polch, Germany
The Integrated Design
The Meyer UM-P Series (UM-100P, UM-1P) selfpowered stage monitors are composed of:
• one 12-inch cone driver and one 3-inch diaphragm
compression driver;
• phase-corrected, optimized control electronics;
• a two-channel amplifier (350 Wrms/ch).
The drivers, control electronics, and amplifier are integrated into a compact enclosure. The UM-P Series is
intended to be used as a stage monitor but can also be
used as a mid-hi and musical instrument speaker.
The UM-1P horn’s narrow beamwidth (45°H x 45°V)
permits precise coverage with minimal interaction between neighboring monitors. The UM-100P horn’s wide
horizontal beamwidth (100°H x 40°V) addresses a
larger coverage area with fewer speakers.
The UM-P Series, more than a powered version of the
Meyer Ultra-monitor, implements these significant design improvements:
• The amplifier is optimized for the system, providing
substantial power without endangering the drivers.
• The integrated design simplifies setup and installation, eliminates amp racks, and extends the
durability and reliability of the loudspeaker.
• The gain structure between the control electronics
and amplifier is perfectly matched.
The UM-P produces flat acoustical phase and amplitude
response, full-range bandwidth, precise imaging, and
exceptional system impulse response.
10 dB from its on-axis amplitude because many listeners
perceive this as a decrease to half the SPL. When reading
a beamwidth specification, it is essential to determine
whether it refers to the –6 or –10 dB points because they
indicate very different results: the –10 dB points yield a
wider angle.
Previous technologies produced horns whose beamwidth
varied over the operating frequency range. These horns
also displayed nonuniform frequency response within,
and significant side lobe energy outside their beamwidth.
Both undesirable characteristics, particularly prevalent
for horns with a wide beamwidth, make array design
extremely uproblemactic
The UM-P was developed in Meyer Sound’s anechoic
chamber by measuring coverage patterns using angular
and frequency resolutions of 1° and 1¦36 octave, respectively. The UM-P horns exhibit constant-Q: the beamwidth
remains consistent across the horn’s operating frequency
range in both the vertical and horizontal planes.
Both horns share the following remarkable attributes:
• uniform frequency response within the beamwidth
• rapid and uniform amplitude attenuation for all
frequencies outside the beamwidth
• minimal side lobes
AC Power
The UM-P uses a PowerCon locking 3-pole AC mains
connector that prevents inadvertent disconnection. The
unit must have the correct power cord for the AC power
in the area in which it will be used.
The UM-P Horns: Constant-Q
In a recent research and development effort, Meyer
Sound solved the most difficult problems associated
with horn design. In order to appreciate the significance
of this work, it is necessary to define an often misunderstood term: the beamwidth of a horn is the angle at
which the sound pressure at a given frequency decreases
to half (–6 dB) its on-axis amplitude. Specifying beamwidth using the –6 dB points has been proposed as the
audio industry standard and Meyer Sound adheres to
this definition.
NOTE: Unfortunately, beamwidth is often used to describe the angle at which the sound pressure decreased
When AC power is applied to the UM-P, an Intelligent
ACtm supply automatically selects the correct operating
voltage, allowing the UM-P to be used internationally
without manually setting voltage switches. The Intelligent
AC supply performs the following protective functions
to compensate for hostile conditions on the AC mains:
• suppresses high voltage transients up to several
• filters EMI (radio frequencies and noise present
on the AC line)
• sustains operation during low-voltage periods,
which minimizes audio discontinuity
• provides soft-start power-up, which eliminates
high inrush current
The UM-P can withstand continuous voltages up to
264V and allows any combination of voltage to GND
(i.e. Neutral-Hot-GND, Hot-Hot-GND). Continuous
voltages higher than 264V may damage the unit.
Voltage Requirements
The UM-P operates safely and without audio discontinuity if the AC voltage stays within the range 88–264V,
47–63 Hz. After applying AC power, the system is muted
while the circuitry charges up and stabilizes. After two
seconds, the On/Temp. LED on the user panel illuminates green, the system unmutes and is ready to pass
audio signals. If the On/Temp. LED does not illuminate
or the system does not respond to audio input after ten
seconds, consult the Troubleshooting section.
The UM-P’s power supply uses stored energy to continue
functioning for about 10 AC cycles if the voltage decreases
below 88V (a condition known as brownout). The precise
length of time the unit functions during brownout
depends on the operating level and how low the voltage
drops. The unit turns off if the voltage does not increase
above 88V before the storage circuits are depleted. If
the UM-P shuts down due to brownout, the power
supply automatically turns on after three seconds if the
voltage returns to the normal operating range. If the
UM-P does not turn back on after ten seconds, consult
the Troubleshooting section.
NOTE: We recommend that the supply be operated at
least a few volts away from the upper and lower bounds
of the operating range to avoid possible shutdown.
Current Requirements
Each UM-P requires approximately 3A rms @115V
(1.5A rms@230V) for proper operation, allowing up to
five UM-Ps to be powered from one 15A circuit. However, we recommend powering no more than three UM-Ps
per 15A branch to allow a 30% margin for peak voltages.
The UM-P presents a dynamic load to the AC mains
which causes the amount of current to fluctuate between quiet and loud operating levels. This affects the
number of UM-Ps that can be used for a given breaker
type. Since different types of cables and circuit breakers
heat up and trip at varying rates, it is essential to
understand the types of current ratings and how they
correspond to circuit breaker and cable specifications.
The maximum continuous RMS current is the maximum
RMS current over a duration of at least 10 seconds. It is
used to calculate the temperature increase in cables,
which is used to select cables that conform to electrical
code standards. It is also used to select the rating for
slow-reacting thermal breakers.
The maximum burst RMS current is the maximum
RMS current over a one second duration. It is used to
select the rating for most magnetic breakers.
The maximum instantaneous peak current during burst
is used to select the rating for fast-reacting magnetic
breakers and to calculate the peak voltage drop in long
AC cables according to the formula
V pkdrop = I pk x R total cable
Use the table below as a guide to select cables and circuit
breakers with appropriate ratings for your operating
UM-P Current Ratings
115 V
230 V
100 V
Idle RMS
0.25 ARMS 0.13 ARMS 0.3 ARMS
Max. Continuous RMS
2.8 ARMS
1.4 ARMS
3.2 ARMS
Max. Burst RMS
3.2 ARMS
1.6 ARMS
3.7 ARMS
Max. Peak During Burst
To determine the minimum total service power required by a system of UM-P, or other Meyer self-powered speakers, add their maximum continuous RMS
currents together. We recommend allowing an additional 30% above the minimum amperage to prevent
peak voltage drops at the service entry and nuisance
Power Connector Wiring
The Modular Rear Panel
Use the following AC cable wiring diagram to create
international or special-purpose power connectors:
brown = hot
blue =
yellow/green =
earth ground
AC cable color code
If the colors referred to in the diagram don't correspond
to the terminals in your plug, use the following guidelines:
• Connect the blue wire to the terminal marked
with an N or colored black.
• Connect the brown wire to the terminal marked
with an L or colored red.
• Connect the green and yellow wire to the terminal
marked with an E (or ) or colored green (or
green and yellow).
Safety Issues
Do not use a ground-lifting adapter or cut the AC
cable ground pin.
The rear panel of the UM-P has two slots for processor
modules. The top slot contains the Audio Input and
Control Module; the bottom slot contains the optional
Remote Monitoring System™ (RMS) Module. A blank
plate covers the bottom slot if RMS is not installed. For
drawings of these modules, see page 13.
Audio Input
There are three, interchangeable Audio Input and Control
Modules with optimized connectors and controls for
different applications. Each module has a 24V Fan
connector to power an optional fan (see page 7).
Each module uses a three-pin, female XLR audio input
connector with a 10 kΩ balanced input impedance wired
with the following convention:
Pin 1 —
220 kΩ to chassis and earth ground (ESD clamped)
Pin 2 —
Pin 3 —
Case —
Earth (AC) ground and chassis
Differential Inputs
Pins 2 and 3 carry the input as a differential signal. Use
standard audio cables with XLR connectors for balanced
signal sources. A single audio source can drive multiple
UM-Ps with a paralleled input loop, creating an unbuffered hardwired loop connection, with negligible loss
in signal level. For example, since the input impedance
of one UM-P is 10 kΩ, looping 20 UM-Ps produces a
balanced input impedance of 500Ω. With a 150Ω audio
source, the 500Ω load results in only a 2.28 dB loss.
Looping Audio Input Module
Keep all liquids away from the UM-P to avoid hazards
from electrical shock.
Do not operate the unit with worn or frayed cables;
replace them immediately.
If the UM-P will be installed outdoors contact Meyer
Sound for information about the rain hood and weather
protection for the drivers and electronics.
While a single UM-P can be hung by its handle bars, do
not hang any additional weight from the cabinet. UM-P
handle bars are not designed to support heavy rigging
This standard module uses a balanced, female XLR
connector for audio input and a male XLR loop connector
to interconnect multiple speakers. The audio input
connector is hardwired with pin 2 hot to comply with
audio industry standards. The loop connector, wired in
parallel to the audio input, transmits the input signal if
the UM-P is turned off for any reason.
Summing Audio Input Module
This module has a balanced, female XLR connector for
audio input but has, instead of a loop connector, a
second female XLR connector that functions as a summing
input. Applying a signal to one of the inputs results in a
normal signal level. Utilizing both summing inputs
creates a correctly summed mono signal with each input
6 dB below the level of a single input. This is an effective
method for distributing both sides of a stereo signal to
a single UM-P without requiring external level control.
Looping, Polarity, and Attenuating Audio
Input Module
This module has a balanced, female XLR audio input
connector, a male XLR loop connector, an input polarity
switch, and a level attenuator knob. With the input
polarity switch in the up (+) position, pin 2 is hot
relative to pin 3, resulting in a positive pressure wave
when a positive signal is applied to pin 2. With the
switch down (–), pin 3 is hot relative to pin 2, resulting
in a negative pressure wave when a positive signal is
applied to pin 2. The level attenuator knob operates
between 0 dB (no level attenuation) in a fully clockwise position to –12 dB in a fully counter-clockwise
Remote Monitoring System
The UM-P can be equipped to operate with the Remote
Monitoring System (RMS) network and software application. RMS displays signal and power levels, driver
and cooling fan status, limiter activity, the state of the
polarity switch, attenuator level, and amplifier temperature for all speakers in the network on a Windowsbased PC. RMS is an excellent field-diagnostic tool that
removes the guesswork from troubleshooting during a
performance. All Meyer RMS-compatible speakers use
the same RMS module so they can be easily exchanged
between speakers (depicted on back page). Installing an
RMS module requires only a Phillips screwdriver.
Contact Meyer Sound for more information about RMS.
Amplification, Limiting, and
Cooling System
Amplification and Limiting
Each driver in the UM-P is powered by one channel of a
proprietary Meyer Sound amplifier utilizing complementary power MOSFET output stages (class AB, bridged,
350 Wrms/ch). Each channel has a limiter that prevents
driver over-excursion and regulates the temperature of
the voice coil. The limiters protect the drivers without
the glaring compression effects imposed by typical
limiters, allowing high SPLs across each driver’s entire
frequency range. Limiter activity for the high and low
channels is indicated by two yellow Limit LEDs on the
rear panel (the high limit is above the low limit LED).
The UM-P performs within its acoustical specifications
and operates at a normal temperature if the limit LEDs
are on for no longer than two seconds, and off for at
least one second. If either LED remains on for longer
than three seconds, that channel incurs these negative
• Increasing the input level will not increase the
• The system distorts due to clipping and nonlinear
driver operation.
While the UM-P limiters fully protect the system under
overload conditions and exhibits smooth sonic characteristics, we recommend that you do not intentionally
drive the UM-P into continuous limiting to attain compression effects.
For applications where large amounts of compression
are required, we recommend using an outboard compressor/limiter for greater control of limit and compressor effects.
Amplifier Natural Convection Cooling System
The UM-P employs a natural convection cooling system that depends on air flow from below the cabinet
over the heatsink. Allow for proper ventillation of
fresh air when using the speaker.
If the temperature of the heatsink reaches 85°C (185°F),
the On/Temp. LED on the rear panel turns from green
(On) to red (Temp.) and the limiter threshold is lowered
to a safe level to prevent the amplifiers from overheating. Under high temperature conditions the limiter
threshold is reduced to 6 dB. When the heatsink tmeperature
decreases to 75°C (167°F), the On/Temp. LED changes
from red to green and the limiter threshold returns to
! The heatsink gets too hot to touch during normal
operation. Use extreme caution when approaching the
rear of the cabinet.
Fan Assembly Kit
While convection cooling is adequate for most applications, driving the UM-P into frequent limiting under
severe temperature conditions, or where ventilation is
restricted, an optional fan kit is available to maintain a
safe operating temperature:
The easy-to-install fan, powered by the 24V Fan rear
panel connector, blows air directly onto the heatsink.
The fan speed increases as the heatsink temperature
rises, which maintains a safe operating temperature
with minimal fan noise. Contact Meyer Sound to order
the fan kit.
Power Supply Fan
The power supply is cooled by a single small internal
fan that turns on low when the unit is first powered up.
The fan doubles its speed as the system is driven with
audio. Since the fan draws air in from, and exhausts it
out the side of the cabinet, there must be at least six
inches on the amplifier’s side of the cabinet and adequate air flow.
UM-P Applications
UM-1P (Top View)
In half-space loading condition, the UM-P will typically
produce a maximum SPL of 135 dB at 1 meter with a
frequency response down to 60Hz, which is perfect for
vocals and most instruments. When using the UM-P in
most applications that require SPL in the sub harmonic
frequencies, such as monitoring drums and bass, the
UM-P should be supplemented with a subwoofer such
as the Meyer USW-1P or 650-P depending on the needs
of the end user. For ideas on integrating the UM-P with
other Meyer Sound products contact Meyer Sound Technical
UM-1P (Front View)
The Constant Q design of the horn allows frequencies
outside of the coverage area of the speaker to attenuate
quickly. This is excellent for monitoring where several
different monitors are used in close proximity. When
placing the monitor carefully consider the coverage
pattern of the UM-P and UM-100P.
UM-100P (Side View)
The UM-1P’s coverage area is:
–6 dB points:
45° H x 45° V
–10 dB points:
65° H x 65° V
The UM-100P’s coverage area is:
–6 dB points:
100° H x 40° V
–10 dB points:
120° H x 60° V
The following drawings illustrate the coverage area of
each horn from three different perspectives in order to
depict the three dimensional coverage pattern.
UM-100P (Top View)
UM-1P (Side View)
UM-100P (Front View)
Verifying Polarity
Incorrect driver polarity impairs system performance
and may damage the drivers. All Meyer Sound loudspeakers are shipped with the drivers in correct alignment.
If the driver or circuit wiring has been removed or
disassembled it is essential to check the polarity between
adjacent monitors and between drivers and between
adjacent loudspeakers.
Driver Polarity in the Same UM-P
Use the following test procedure to verify polarity
between drivers in the same loudspeaker:
1. Place a monitoring microphone 1 meter from the
front of the loudspeaker at the midway point between the high and low frequency drivers.
2. Connect a full range signal to the loudspeaker and
note the frequency response.
The polarity is correct if the frequency response is smooth
through the crossover region (800Hz to 1.5kHz). Cancellation of 6dB or more in this region indicates polarity
Polarity in Adjacent Loudspeakers
Use the following test procedure to verify the polarity
between two adjacent loudspeakers of the same type:
1. Position two loudspeakers adjacent to each other.
2. Place a measurement microphone 3ft. from the
speakers and 3 to 4 feet above the UM-1Ps, on the
axis between the speakers.
3. Connect a signal source to one speaker and note
the frequency response and overall level.
4. Apply the same signal to the second speaker with
the first speaker still connected.
The polarity is correct if the frequency response remains
constant with a 5-6 dB SPL increase in amplitude.
Broadband cancellation (decreased overall level) indicates polarity reversal.
Since polarity reversal causes excessive driver excursion at high source levels, use moderate levels
when conducting these tests.
3 Feet
This section suggests several possible solutions to some
common problems encountered by UM-P users and is
not intended to be a thorough troubleshooting guide.
Qualified electronics technicians with access to a test
bench can request the following documents from Meyer
Sound: Troubleshooting Guide, The Low Frequency
Driver Replacement Procedure, and The High Frequency
Driver Replacement Procedure for the UM-1P/100P.
The On/Temp. LED does not illuminate,
there is no audio, and the power supply
fan is off.
1. Make sure the AC power cable is the correct type
for the regional voltage and that it is securely
connected to the AC inlet then unplug and reconnect the AC cable.
2. Use an AC voltmeter to verify that the AC voltage
is within the ranges 88–264V, 47–63 Hz.
3. Call Meyer Sound Technical Support.
The On/Temp. LED is illuminated but there
is no sound.
Under Test
1. Verify that the audio source (mixer, EQ, delay) is
sending a valid signal.
2. Make sure the XLR cable is securely fastened to the
XLR audio input connector.
3. Verify that the XLR cable is functioning by substituting another cable or by using the cable in question in a working system.
4. Send the audio signal to another speaker to insure
signal presence and that the level is within the
proper range. Turn the source level down before
reconnecting the audio input and increase the level
slowly to avoid a sudden blast of sound.
5. If possible, monitor the audio source with headphones.
Hum or noise is produced by the speaker.
1. Disconnect the audio input. If the hum ceases, the
noise originates somwhere earlier in the signal
path. If the noise persists, the problem is within the
UM-P. In this case return the unit to the factory or
nearest authorized service center.
2. Make sure the XLR cable is securely fastened to the
XLR audio input connector.
3. Send the audio signal to another speaker to insure
signal presence and that the level is within the
proper range. Turn the source level down before
reconnecting the audio input and increase the level
slowly to avoid a sudden blast of sound.
5. Hum or noise can be produced by a ground loop.
Since the UM-P is effectively ground-lifted, this
should not occur unless grounds are extremely
different voltages.
The audio produced by the speaker is
distorted or compressed but the limit light
is not illuminated.
1. Make sure the XLR cable is securely fastened to the
XLR audio input connector.
2. Send the audio signal to another speaker to insure
that the level is within the proper range. Turn the
source level down before reconnecting the audio
input and increase the level slowly to avoid a
sudden blast of sound.
3. Monitor the audio source with headphones.
The audio produced by the speaker is
highly compressed and the limit light is
constantly yellow.
1. Turn down the level of the input signal to the
speaker system.
Only the high or low driver seems to produce sound.
1. Make sure the audio signal is full-range and has
not been filtered in a previous stage of the signal
chain. If possible, monitor the audio source with
high-quality headphones.
2. Send the audio signal to another speaker to insure
that the signal is full-range. Turn the source level
down before reconnecting the audio input and
increase the level slowly to avoid a sudden blast of
3. Use a sine wave and/or pink noise generator to
send a variety of frequencies to the speaker.
There is some sound but the On/Temp.
LED turns from green to red.
This occurs when the heatsink temperature reaches 85°C
(185°F), indicating that the amplifier is thermally overloaded. The limiter threshold has dropped to a safe
level, so the audio level is probably reduced.
1. Make sure there is enough clearance above, below,
and behind the unit.
2. Make sure there is sufficient air flow around the
3. Avoid exposing the heatsink to direct sunlight if
the ambient temperature is high.
4. If the ambient temperature is greater than 30°C
and this condition occurs frequently, contact Meyer
Sound to order the optional Fan Kit.
See the section Amplification, Limiting, and Cooling
System on page 6 for a complete discussion about the
cooling system.
There is no sound, the On/Temp. LED is
dim or off, and the power supply fan is on
high speed.
This extremely rare event occurs when the power supply
overheats, causing a 1-2 minute interruption in operation.
The unit turns on again when the power supply has
cooled sufficiently.
1. Make sure there is at least six inches clearance
behind the unit.
2. Make sure there is sufficient air flow around the
3. Avoid exposing the unit to direct sunlight in high
ambient temperature.
See the section Amplification, Limiting, and Cooling
System on page 6 for a more information about the
power supply’s internal fan and cooling system.
Safety Summary
• To reduce the risk of electric shock, disconnect the loudspeaker from the AC mains before installing audio cable.
Reconnect the power cord only after making all signal
• Pour réduire le risque d’électrocution, débrancher la
prise principale de l’haut-parleur, avant d’installer le câble
d’interface allant à l’audio. Ne rebrancher le bloc
d’alimentation qu’après avoir effectué toutes les connections.
• Connect the loudspeaker to a two-pole, three wire grounding
mains receptacle. The receptacle must be connected to a
fuse or circuit breaker. Connection to any other type of
receptacle poses a shock hazard and may violate local
electrical codes.
• Branchez l’haut-parleur dans une prise de courant à 3
dérivations (deux pôles et la terre). Cette prise doit être
munie d’une protection adéquate (fusible ou coupe-circuit).
Le branchement dans tout autre genre de prise pourrait
entraîner un risque d’électrocution et peut constituer une
infraction à la réglementation locale concernant les
installations électriques.
• Do not install the loudspeaker in wet or humid locations
without using weather protection equipment from Meyer
• Do not allow water or any foreign object to get inside the
loudspeaker. Do not put objects containing liquid on, or
near, the unit.
• To reduce the risk of overheating the loudspeaker, avoid
exposing it to direct sunlight. Do not install the unit near
heat emitting appliances, such as a room heater or stove.
• This loudspeaker contains potentially hazardous voltages.
Do not attempt to disassemble the unit. The unit contains
no user serviceable parts. Repairs should be performed
only by factory trained service personnel.
• Ne pas installer l’haut-parleur dans un endroit où il y a de
l’eau ou une humidité excessive.
• Ne pas laisser de l’eau ou tout objet pénétrer dans l’hautparleur. Ne pas placer de r´cipients contenant un liquide
sur cet appareil, ni à proximité de celui-ci.
• Pour éviter une surchauffe de l’haut-parleur, conserver-la
à l’abri du soleil. Ne pas installer à proximité d’appareils
dégageant de la chaleur tels que radiateurs ou appareils
de chauffage.
• Ce haut-parleur contient des circuits haute tension
présentant un danger. Ne jamais essayer de le démonter.
Il n’y a aucun composant qui puisse être réparé par
l’utilisateur. Toutes les réparations doivent être effectuées
par du personnel qualifié et agréé par le constructeur.
• Um die Gefahr eines elektrischen Schlages auf ein Minimum zu reduzieren, den Lautsprecher vom Stromnetz
trennen, bevor ggf. ein Audio-Schnittstellensignalkabel
angeschlossen wird. Das Netzkabel erst nach Herstellung
aller Signalverbindungen wieder einstecken.
• Para reducir el riesgo de descarga eléctrica, desconecte de
la red el altoparlante antes de instalar el cable de
señalización de interfaz de la segnale. Vuelva a conectar el
conductor flexible de alimentación solamente una vez
efectuadas todas las interconexiones de señalizatción.
• Der Lautsprecher an eine geerdete zweipolige DreiphasenNetzsteckdose anschließen. Die Steckdose muß mit einem
geeigneten Abzweigschutz (Sicherung oder
Leistungsschalter) verbunden sein. Der Anschluß der
unterbrechungsfreien Stromversorgung an einen anderen
Steckdosentyp kann zu Stromschlägen führen und gegen
die örtlichen Vorschriften verstoßen.
• Conecte el altoparlante a un tomacorriente bipolar y trifilar
con neutro de puesta a tierra. El tomacorriente debe estar
conectado a la protección de derivación apropiada (ya sea
un fusible o un disyuntor). La conexión a cualquier otro
tipo de tomacorriente puede constituir peligro de descarga
eléctrica y violar los códigos eléctricos locales.
• Der Lautsprecher nicht an einem Ort aufstellen, an dem
sie mit Wasser oder übermäßig hoher Luftfeuchtigkeit in
Berührung kommen könnte.
• Darauf achten, daß weder Wasser noch Fremdkörper in
das Innere den Lautsprecher eindringen. Keine Objekte,
die Flüssigkeit enthalten, auf oder neben die
unterbrechungsfreie Stromversorgung stellen.
• Um ein Überhitzen dem Lautsprecher zu verhindern, das
Gerät vor direkter Sonneneinstrahlung fernhalten und
nicht in der Nähe von wärmeabstrahlenden
Haushaltsgeräten (z.B. Heizgerät oder Herd) aufstellen.
• Im Inneren diesem Lautsprecher herrschen potentiell
gefährliche Spannungen. Nicht versuchen, das Gerät zu
öffnen. Es enthält keine vom Benutzer reparierbaren Teile.
Reparaturen dürfen nur von ausgebildetem
Kundenienstpersonal durchgeführt werden.
• No instale el altoparlante en lugares donde haya agua o
humedad excesiva.
• No deje que en el altoparlante entre agua ni ningún objeto
extraño. No ponga objetos con líquidos encima de la
unidad ni cerca de ella.
• Para reducir el riesgo de sobrecalentamiento, no exponga
la unidad a los rayos directos del sol ni la instale cerca de
artefactos que emiten calor, como estufas o cocinas.
• Este altoparlante contiene niveles de voltaje peligrosos en
potencia. No intente desarmar la unidad, pues no contiene
piezas que puedan ser repardas por el usuario. Las
reparaciones deben efectuarse únicamente por parte del
personal de mantenimiento capacitado en la fábrica.
Rear Panel and Optional Modules
The user panel and optional modules are described on page 5 of this guide.
User Panel with RMS option and standard Looping Audio Input Module.
Looping, Polarity, and Attenuating Input Module.
High Limit LED
GND Circuit
1kΩ Each
25kΩ Balanced
Low Limit LED
Summing Audio Input
Earth /
Summing Inputs
On / Temp.
Summing Audio Input Module
(in inches)
UM-100P Front
UM-1P Front
GND Circuit
Looping Audio Input
220k Ω
Earth /
On / Temp.
AC Input
50-60Hz 4A MAX
UM-P Top
UM-P Side
Contact Information
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, California 94702
Telephone: 510 - 486 - 1166
510 - 486 - 8356
UM-P Back