Meyer Sound UPJ-1P User Manual

OPERATING INSTRUCTIONS

UPJ-1P Compact VariO™ Loudspeaker

ULTRASERIES

Keep these important operating instructions.

Check www.meyersound.com for updates.

DECLARATION OF CONFORMITY ACCORDING TO ISO/IEC GUIDE 22 AND EN 45014

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European Office:
Meyer Sound Lab. GmbH
Carl Zeiss Strasse 13
56751 Polch, Germany

Made by Meyer Sound Laboratories
Berkeley, California USA

N775

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Manufacturer's Name:

Meyer Sound Laboratories Inc.

Manufacturer's Address:

2832 San Pablo Avenue
Berkeley, CA 94702-2204, USA

Declares that the products

Product Name: UPJ-1P
Product Options: All

Conforms to the following Product Specifications
Safety: IEC 60065:1998
EN 60065:1998
UL 6500/09.99
CAN/CSA E60065-00
EMC: EN 55103-1: 1997 emission(1)
EN 55103-2: 1997 immunity(2)

This device complies with the requirements of the
Low Voltage Directive 73 / 23 / EEC and the
EMC Directive 89 / 336 / EEC.

This device also complies with EN 55103-1 & -2. Operation is
subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including

interference that may cause undesired operation.

Supplementary Information

The product herewith complies with the requirements of the Low
Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC.

Ofce of Quality Manager
Berkeley, California USA
August 28, 2003

European Contact: Your local Meyer Sound dealer or Meyer Sound
Germany, GmbH. Carl Zeiss Strasse 13, 56751 Polch, Germany.
Telephone: [phone] Fax: [phone]

Environmental specifications for Meyer Sound Electronics products

Operating Temperature 0˚ C to + 45˚ C
Non operating Temperature <-40˚ C or > +75˚ C
Humidity to 95% at 35˚ C
Operating Altitude to 4600 m (15,000 ft)
Non operating Altitude to 6300 m (25,000 ft)
Shock 30 g 11 msec half-sine on

each of 6 sides

Vibration 10 Hz to 55 Hz (0.010 m peak-

to-peak excursion)

Note: Installation restrictions may be applied by supply authorities
in relation to harmonics and voltage fluctuations (flicker).

COPYRIGHT

© 2003 Meyer Sound. All rights reserved.
UPJ-1P Compact VariO Loudspeaker Operating Instructions

The contents of this manual are furnished for informational purposes only, are subject to change without notice, and should not be construed as a
commitment by Meyer Sound Laboratories Inc. Meyer Sound assumes no responsibility or liability for any errors or inaccuracies that may appear
in this manual. Except as permitted by applicable copyright law, no part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, electronic, mechanical, recording or otherwise, without prior written permission from Meyer Sound.

UltraSeries, VariO, Intelligent AC, RMS and all alpha-numeric designations for Meyer Sound products and accessories are trademarks of Meyer
Sound. Meyer Sound, Meyer Sound MAPP Online, SIM and QuickFly are registered trademarks of Meyer Sound Laboratories Inc. (Reg. U.S. Pat.
& Tm. Off.). All third-party trademarks mentioned herein are the property of their respective trademark holders.

Printed in the U.S.A.

Part Number: 05.134.400.01, Rev. B

ii

SYMBOLS USED

!

!

These symbols indicate important safety or operating features in this booklet and on the chassis:

Dangerous voltages: risk of

electric shock

Pour indiquer les risques

résultant de tensions

dangereuses

Zu die gefahren von

gefährliche spanning zeigen

Para indicar voltajes

peligrosos.

Important operating

instructions

Pour indequer important

instructions

Zu wichtige betriebs-

anweisung und unter-

haltsanweisung zeigen

Instrucciones importantes

de funcionamiento y/o

manteniento

IMPORTANT SAFETY INSTRUCTIONS

1 Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this loudspeaker near water.

6. Clean only with dry cloth.

7. Do not block any ventilation openings. Install in ac­cordance with Meyer Sound's installation instructions.

Frame or chassis Protective earth ground

Masse, châssis Terre de protection

Rahmen oder chassis Die schutzerde

Armadura o chassis Tierra proteccionista

11. Only use attachments/accessories specied by Meyer
Sound.

12. Use only with the caster rails or rigging specied by
Meyer Sound, or sold with the loudspeaker. Handles
are for carrying only.

CAUTION: Rigging should only be done by

experienced professionals.

8. Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus that produce
heat.

9. Do not defeat the safety purpose of the grounding­type plug. A grounding type plug has two blades and
a third grounding prong. The third prong is provided
for your safety. If the provided plug does not t into
your outlet, consult an electrician for replacement of
the obsolete outlet.

10. Protect the power cord from being walked on or
pinched, particularly at plugs, convenience recep­tacles, and the point where they exit from the loud­speaker. The AC mains plug or appliance coupler shall
remain readily accessible for operation.

13. Unplug this loudspeaker during lightning storms or
when unused for long periods of time.

14. Refer all servicing to qualied service personnel.
Servicing is required when the loudspeaker has been
damaged in any way, such as when the power-sup­ply cord or plug has been damaged; liquid has been
spilled or objects have fallen into the loudspeaker; rain
or moisture has entered the loudspeaker; the loud­speaker has been dropped; or when for undetermined
reasons the loudspeaker does not operate normally.

iii

SAFETY SUMMARY

English

- 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
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.

- Do not install the loudspeaker
in wet or humid locations
without using weather protection
equipment from Meyer Sound.

- 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 user­serviceable parts. Repairs should
be performed only by factory­trained service personnel.

Français

- Pour réduire le risque
d’électrocution, débrancher
la prise principale de l’haut­parleur, avant d’installer le câble
d’interface allant à l’audio. Ne
rebrancher le bloc d’alimentation
qu’après avoir effectué toutes les
connections.

- 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.

- 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’haut-parleur.
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 qualié et agréé
par le constructeur.

Deutsch

- Um die Gefahr eines elektrischen
Schlages auf ein Minimum zu
reduzieren, den Lautsprecher
vom Stromnetz trennen, bevor
ggf. ein Audio-Schnittstellensign
alkabel angeschlossen wird. Das
Netzkabel erst nach Herstellung
aller Signalverbindungen wieder
einstecken.

- 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.

- 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
herr-schen potentiell gefährliche
Spannungen. Nicht versuchen,
das Gerät zu öffnen. Es
enthält keine vom Benutzer
reparierbaren Teile. Reparaturen
dürfen nur von ausgebildetem
Kundenienstpersonal durchgeführt
werden.

Español

- Para reducir el riesgo de descarga
eléctrica, desconecte de la red
de voltaje el altoparlante antes de
instalar el cable de señal de audio.
Vuelva a conectar la alimentacion
de voltaje una vez efectuadas
todas las interconexiones de
señalizacion de audio.

- Conecte el altoparlante a un
tomacorriente bipolar y trilar
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.

- 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.

iv

CONTENTS

INTRODUCTION 1

How to Use this Manual 1
Introducing the UPJ-1P Compact VariO™ Loudspeaker 1

CHAPTER 1: Power Requirements 3

AC Power 3

Voltage Requirements 3
Current Requirements 4
Power Connector Wiring 4

Electrical Safety Issues 4

CHAPTER 2: Amplication and Audio 5

Audio Input 5

Looping Audio Input Module 5

Looping, Polarity, and Attenuating Audio Input Module 5
Amplication and Limiting 6
Amplier Cooling System 6

CHAPTER 3: RMS™ Remote Monitoring System (Optional) 7

Understanding the User Panel 7

Service LED (Red) 8

Service Button 8

Wink LED (green) 8

Reset Button 8

Activity LED (Green) 8
User Interface 8
Daisy-Chained 9

CHAPTER 4: Using Subwoofers with the UPJ-1P 9

Adding a Line Driver 9

Engaging the Lo-Cut lter 10
Digital Signal Processors 10

CHAPTER 5: System Design and Integration 11

Meyer Sound MAPP Online® 11
SIM® Measurement System 12

Source Independent Measurement Technique 12

Applications 12

CHAPTER 6: Rotating the VariO Horn 13

CHAPTER 7: QuickFly Rigging 15

Basic Rigging Congurations 15
Pole-Mounting the UPJ-1P, Single Unit 16
Using the MLB-UPJ L-Bracket 16

Wall Mount 16

Ceiling Mount 16

Floor Mount 17

v

MYA-UPJ Mounting Yoke Assembly 17
Using the MAA-UPJ Array Adapter 17

Horizontal Array 18

Pole-Mounting a Horizontal Array 18
Flying a Horizontal Array 18

Vertical Array 18

Ceiling Mounting a Vertical Array 19
Flying a Vertical Array 19

Appendix A 21

Basic Troubleshooting 21

Appendix B 23

UPJ-1P Specications 23

vi

!

INTRODUCTION

INTRODUCTION

HOW TO USE THIS MANUAL

As you read this manual, you’ll nd gures and diagrams
to help you understand and visualize what you’re reading.
You’ll also nd numerous icons that serve as cues to ag
important information or warn you against improper or po­tentially harmful activities. These icons include:

A NOTE identies an important or useful
piece of information relating to the topic

under discussion.

A TIP offers a helpful tip relevant to the topic
at hand.

A CAUTION gives notice that an action can

have serious consequences and could cause
harm to equipment or personnel, delays, or other
problems.

The UPJ-1P’s low-frequency section employs a 10-inch
neodymium magnet cone driver, while the high-frequency
section utilizes a 0.75-inch exit, 3-inch diaphragm compres­sion driver of proprietary design. The VariO horn allows
quick rotation to provide a 80° x 50° coverage pattern in ei­ther the horizontal or the vertical plane. A two-channel class
AB power amplier with complementary MOSFET output
stages provides a total output of 300 watts for the low- and
high-frequency sections.

The UPJ-1P cabinet's end plates provide unprecedented
mounting, ying and arraying exibility, and are made of
heavy duty, high-strength, corrosion-resistant 6061-T6
aluminum. Strategically placed M8 threaded points allow
simple mounting using eyebolts or directly to third party
pole assemblies. Available QuickFly® rigging options — in­cluding an array adapter (also made from 6061-T6 alumi­num), yokes, and “L”-brackets — attach easily and securely
to the aluminum end plates allowing UPJ-1P to be mounted
or own, either as a single cabinet or in arrays. The optional
RMS™ remote monitoring system module allows com­prehensive monitoring of all key system parameters on a
remote RMS host PC.

INTRODUCING THE UPJ-1P COMPACT VARIO™ LOUDSPEAKER

The UPJ-1P compact VariO loudspeaker combines the
advantages of being self-powered with the placement
and arraying exibility afforded by a VariO rotatable horn.
Remarkably compact and lightweight, the UPJ-1P (Figure
i.1) produces a robust peak power output of 128 dB SPL
at 1 meter, making it suitable for use either as a primary
loudspeaker in small rooms or as a ll, delay, effects or un­der-balcony loudspeaker in any type of large or distributed
system application.

NOTE: Read this entire manual carefully

before conguring and deploying a UPJ-1P
system. In particular, pay careful attention to the
sections about safety issues.

Information and specications are applicable as of the date
of this printing. Updates and supplementary information are
posted on the Meyer Sound website at:

http://www.meyersound.com

You may contact Meyer Sound Technical Support at:

Tel: [phone]

Fax: [phone]

Email: [e-mail]

Figure i.1: UPJ-1P compact VariO loudspeaker

1

INTRODUCTION

2

!

!

!

!

CHAPTER 1: POWER REQUIREMENTS

CHAPTER 1

Self-powered and compact, the UPJ-1P combines ad­vanced loudspeaker technology with equally advanced
power capabilities. Understanding power distribution, volt­age and current requirements, as well as electrical safety
issues, is critical to the safe operation of the UPJ-1P.

AC POWER

The UPJ-1P uses a PowerCon 3-pole AC mains system
with locking connectors to prevent accidental discon­nection. It may also be daisy-chained by using the grey
connector (Figure 1.1) to loop units together. The blue
connector serves as the power input; to loop additional
units, simply attach a cable from the grey connector of the
rst loudspeaker to the blue connector of the second, and
so on. One looping connector is included with each UPJ­1P. Optional assembled looping cables can be purchased
from Meyer Sound.

Blue

Grey

The UPJ-1P can withstand continuous voltages up to
264 V and allows any combination of voltage to GND (that
is, neutral-line-ground or line-line-ground).

CAUTION: Continuous voltages higher than

264 V may damage your UPJ-1P.

Voltage Requirements

The UPJ-1P operates safely and without audio discontinu­ity if the AC voltage stays within the operating window of
90-264 V AC, at 50 or 60 Hz.

After applying AC power, the system is muted while the
circuitry charges up and stabilizes. During the next two
seconds the following events occur:

1. The fan turns on.

2. The main power supply slowly ramps on.

3. The green On/Temp LED on the user panel lights up,
indicating that the system is enabled and ready to
pass audio signals.

Figure 1.1. You can daisy-chain UPJ-1P loudspeakers using the grey
connector.

CAUTION: Do not loop more than four

UPJ-1Ps from the loop out connector when
connected at 115 V and not more than eight when
driven at 230 V.

CAUTION: Be sure to select the correct

power plug for the AC power in the area in
which you operate your UPJ-1P loudspeaker.

When AC power is applied to the UPJ-1P, its Intelligent
AC™ power supply automatically selects the correct
operating voltage, allowing it to be used internationally
without manually setting voltage switches. Intelligent AC
performs the following protective functions to compensate
for hostile conditions on the AC mains:

 Suppresses high-voltage transients up to several kilo-

volts

 Filters common mode and differential mode radio

frequencies (EMI)

CAUTION: If the On/Temp LED does not

illuminate or the system does not respond
to audio input after ten seconds, remove AC power
immediately. Verify that the voltage is within the
proper range. If the problem persists, please con­tact Meyer Sound or an authorized service center.

If the voltage drops below the low boundary of its safe
operating range (brownout), the UPJ-1P loudspeaker uses
stored energy to continue functioning briey, and shuts
down only if voltage does not rise above the low bound­ary before storage circuits are depleted. How long the
loudspeaker will continue to function during brownout
depends on the amount of voltage drop and the audio
source level during the drop.

If the voltage increases above the upper boundary of the
range, the power supply can be damaged.

NOTE: It is recommended that the supply

be operated in its rated voltage window at
least a few volts away from the extreme points.
This ensures that AC voltage variations from the
service entry – or peak voltage drops due to cable
runs – do not cause the amplier to cycle on and
off or cause damage to the power supply.

 Sustains operation temporarily during low-voltage

periods

3

CHAPTER 1

brown = hot

blue = 
neutral

yellow/green =
earth ground
(chassis)

!

Current Requirements

Each UPJ-1P requires approximately 3 A rms max at 115
V AC for proper operation. This allows up to ve UPJ-1Ps
to be powered from one 15 A breaker at 115 V and up to 9
loudspeakers at 230 V.

The UPJ-1P presents a dynamic load to the AC mains,
which causes the amount of current to uctuate between
quiet and loud operating levels. Since different cables and
circuit breakers heat up at varying rates, it is essential to
understand the types of current ratings and how they cor­respond to circuit breaker and cable specications.

The maximum long-term continuous current is the maxi­mum rms current during a period of at least ten seconds.
It is used to calculate the temperature increase in cables,
in order to select a cable size and gauge that conforms to
electrical code standards. It is also used to select the rating
for slow-reacting thermal breakers.

The burst current is the maximum rms current during a
period of approximately one second, used to select the
rating of most magnetic breakers and to calculate the peak
voltage drop in long AC cables according to the formula:

NOTE: For best performance, the AC cable

voltage drop should not exceed 10 volts, or
10 percent at 115 volts and 5 percent at 230 volts.
Make sure that even with the AC voltage drop,
the AC voltage always stays within the operating
ranges.

The minimum electrical service amperage required by a
UPJ-1P system is the sum of each loudspeaker’s maximum
continuous rms current. An additional 30 percent above the
minimum amperage is recommended to prevent peak volt­age drops at the service entry.

Power Connector Wiring

The UPJ-1P loudspeaker requires a grounded outlet. It is
very important that the system be properly grounded in or­der to operate safely and properly. Use the AC cable wiring
diagram in Figure 1.2 to create international or special-pur­pose power connectors:

V pk (drop)= I pk x R (cable total)

The ultimate short-term peak current is used to select the
rating of fast reacting magnetic breakers.

Use Table 1.1 below as a guide when selecting cable gauge
size and circuit breaker ratings for your operating voltage.

Table 1.1: UPJ-1P Current Ratings

Current Draw 115 V AC 230 V AC 100 V AC

Max. long-term
continuous

Burst current 5 A rms 2.5 A rms 5.8 A rms

Ultimate short­term peak

Idle current 0.41 A rms 0.33 A rms 0.42 A rms

3.2 A rms 1.65 A rms 3.7 A rms

17 A pk 8.5 A pk 20 A pk

Figure 1.2. 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 colored green or green and yellow.

ELECTRICAL SAFETY ISSUES

CAUTION: The UPJ-1P requires a ground

connection. Always use a grounded outlet

and plug.

4

!

+

-

CHAPTER 2: AMPLIFICATION AND AUDIO

The UPJ-1P uses sophisticated amplication and protec­tion circuitry to produce consistent and predictable results
in any system design. This chapter will help you under­stand and harness the power of the UPJ-1P amplier and
audio systems.

The rear panel of the UPJ-1P (Figure 2.1) provides two
slots for processor modules. The top slot contains the
audio input/control module. The optional RMS™ commu­nications module sits in the bottom slot if installed; a blank
plate covers the bottom slot if RMS is not installed.

CHAPTER 2

CAUTION: Shorting an input connector pin

to the case can form a ground loop and

cause hum.

Looping Audio Input Module

If the UPJ-1P is equipped with the looping audio input
module (Figure 2.2), Pins 2 and 3 carry the input as a dif­ferential signal; pin 2 is hot relative to pin 3, resulting in a
positive pressure wave when a positive signal is applied to
pin 2.

Figure 2.1. The rear panel of the UPJ-1P with looping audio input
module and optional RMS

NOTE: See Chapter 3, “RMS Remote Moni-

toring System (Optional)” for more informa-

tion on using RMS with the UPJ-1P.

AUDIO INPUT

The UPJ-1P uses a balanced, female XLR connector for
the audio input module in the UPJ-1P, and a male XLR
loop connector to interconnect multiple UPJ-1Ps. The
loop connector, wired in parallel to the audio input, trans­mits the input signal if the UPJ-1P is turned off for any
reason.

The UPJ-1P audio input presents a 10 kOhm balanced
input impedance to a three-pin XLR connector with the
following connectors:

 Pin 1 — 220 kOhm to chassis and earth ground (ESD

clamped)

 Pin 2 — Signal ( + )

 Pin 3 — Signal ( - )

 Case — Earth (AC) ground and chassis

There are two interchangeable audio input modules with
and without controls for different applications.

Figure 2.2. The looping audio input module

Pin 1 is connected to earth through 220-kOhm, 1000 pF,
15 V clamp network. This ingenious circuit provides virtual
ground lift at audio frequencies, while allowing unwanted
signals to bleed to ground. Use standard audio cables
with XLR connectors for balanced signal sources with all 3
pins connected on both ends. Telescopic grounding is not
recommended.

Looping, Polarity, and Attenuating Audio Input Module

This looping, polarity, and attenuating audio input mod­ule (Figure 2.3) has a balanced, female XLR audio input
connector, a male XLR loop connector, an input polarity
switch, and a level attenuator. The input polarity switch
offers a convenient method of reversing the polarity of the
loudspeaker system.

Figure 2.3. The looping, polarity, and attenuating audio input module

When the input polarity switch is in the up ( + ) position,
pin 2 is hot. When the switch is down ( - ), pin 3 is hot rela­tive to pin 2, resulting in a positive pressure wave when
a positive signal is applied to pin 3. The level attenuator
operates between 0 dB (no level attenuation) when turned
all the way to the right, to –18 dB when turned all the way
to the left.

5

CHAPTER 2

!

!

Regardless of the input module type, audio signals can be
daisy-chained using the loop output connector on the user
panel. A single source can drive multiple UPJ-1Ps with a
paralleled input loop, creating an unbuffered hard-wired
loop connection.

If driving multiple UPJ-1Ps in a system, make certain that
the source device can drive the total load impedance pre­sented by the paralleled input circuit of the array. The audio
source must be capable of producing a minimum of 20 dB
volts (10 volts rms into 600 ohms) to produce the maximum
peak SPL over the operating bandwidth of the loudspeaker.

To avoid distortion from the source, make sure the source
equipment provides an adequate drive circuit design for the
total paralleled load impedance presented by the system.
The input impedance for a single loudspeaker is 10 kOhms.
If n represents the number of UPJ-1P loudspeakers in a
system, paralleling the inputs of n loudspeakers will pro­duce a balanced input load of 10 kOhms divided by n.

NOTE: Most source equipment is safe for

driving loads no smaller than 10 times the

source’s output impedance.

For example, cascading an array of 10 units consisting of
UPJ-1Ps produces an input impedance of 1000 ohms (10
kOhms divided by 10). The source equipment should have
an output impedance of 100 ohms or less. This is also true
when connecting UPJ-1Ps in parallel (loop out) with other
self-powered Meyer Sound loudspeakers and subwoofers

TIP: If noises such as hiss and popping are

produced by the loudspeaker, disconnect
the audio cable from the loudspeaker. If the noise
stops, then most likely the problem is not with the
loudspeaker. Check the audio cable, source, and
AC power for the source of the problem.

has peak and rms limiters that prevent driver over-excur­sion and regulate the temperature of the voice coil. Limiter
activity for the high and low channels is indicated by two
yellow limit LEDs on the rear panel (the high-frequency
limit LED is on top and the low-frequency limit LED is on
bottom).

The UPJ-1P performs within its acoustical specications
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 consequences:

 Increasing the input level will not increase the volume.

 The system distorts due to clipping and nonlinear

driver operation.

 Unequal limiting between the low and high frequency

drivers alters the frequency response.

Limiters protect the system under overload conditions and
exhibit smooth sonic characteristics, but we recommend
that you do not drive the UPJ-1P into continuous limiting.

NOTE: Limit LEDs indicate when the safe

power level is exceeded. If a UPJ-1P system
begins to limit before reaching the required SPL,
consider adding more loudspeakers.

AMPLIFIER COOLING SYSTEM

The UPJ-1P amplier employs a combination of natural
convection and forced air in its cooling system. The large
heatsink used in the amplier allows natural convec­tion cooling from air owing over the ns. A low noise
fan forces air to the ns, keeping the temperature on the
amplier low even when the loudspeakers are being used
at high ambient temperature, in tightly packed conditions
and/or at high continuous levels.

NOTE: Ensure that all cabling carrying signal

to multiple UPJ-1Ps is wired correctly (Pin
1 to Pin 1, Pin 2 to Pin 2, and so on), to prevent the
polarity from being reversed. If one or more loud­speakers in a system has reversed polarity, this can
cause severe degradation in frequency response
and coverage.

AMPLIFICATION AND LIMITING

The low- and high-frequency drivers in the UPJ-1P are
powered by a two-channel proprietary Meyer Sound
amplier utilizing complementary MOSFET output stages.
The amplier processes the audio through the use of elec­tronic crossover, phase and frequency response correction
lters as well as driver protection circuitry. Each channel

6

CAUTION: To keep the heatsink from

getting too hot, ensure proper ventilation
around the loudspeaker, especially when using the
UPJ-1P in tightly packed conditions.

If the temperature of the heatsink reaches 75° C (167° F),
the fan switches to high speed and the On/Temp. LED on
the rear panel turns from green (On) to red (Temp.) The unit
continues to operate normally even if On/Temp LED is red.

When the heatsink temperature decreases to 65° C (149°
F), the On/Temp. LED changes from red to green

CAUTION: The heatsink can reach temper-

atures up to 75° C (167° F) during normal
operation. Use extreme caution when approaching
the rear of the cabinet.

CHAPTER 3: RMS REMOTE MONITORING SYSTEM (OPTIONAL)

CHAPTER 3

An optional RMS communication module can be installed in
the UPJ-1P’s amplier to make use of Meyer Sound’s RMS
remote monitoring system.

RMS is a real-time networked monitoring system that con­nects Meyer Sound self-powered loudspeakers with a Win­dows-based PC at the sound mix position or other desired
location. Optional RMS software delivers extensive status
and system performance data directly to you from every
installed loudspeaker.

RMS allows you to monitor amplier voltages, limiting
activity, power output, temperature, fan and driver status,
warning alerts, and other key data for up to 62 loudspeak­ers without a network repeater; data is updated two to ve
times per second.

NOTE: Optional Loudspeaker Mute and

Solo functions, helpful for acoustic setup or
troubleshooting, are also available. A jumper must
be installed in the RMS communication module in
order to enable Mute and/or Solo functionality; the
software also needs to be enabled for these func­tions.

If the UPJ-1P is shipped tted with an RMS com­munication module, the loudspeaker is shipped
with these functions disabled. Once enabled, the
jumper(s) can still be removed to eliminate any
chance of an operator error (a muting error, for
example) during a performance, and both functions
can be controlled by software commands in any
case. Also note that RMS does not control loud­speaker volume or AC power.

Loudspeakers are identied on the network by Node Names
assigned during a one-time “commission” (Figure 3.1) into
the RMS database that resides on your computer (as a part
of the software).

This information is permanently retained on each RMS
communication board and in the computer RMS database
unless you modify it. Speaker View labels can be modied
at any time, allowing you to customize how you view the
data. In addition, any UPJ-1P can be physically identied
from RMS software by activating the Wink function – a Wink
LED will turn on the RMS communication board that cor­responds to its Node Name.

A UPJ-1P is identied using the RMS software by activat­ing the “service” function; an icon will show up on the RMS
screen corresponding to its Node Name (Figure 3.2). This
makes verifying Speaker View titles and speaker eld labels
easy, using the Wink or Service Button commands.

Figure 3.2. RMS loudspeaker icons

NOTE: If the UPJ-1P’s amplier heatsink

temperature exceeds 75° C (167° F), the
RMS user panel On/Temp LED will turn red, while
the loudspeaker icon in the RMS host software will
respond by displaying yellow — indicating that the
UPJ-1P is running hot, but still within safe operating
limits. If the color in the RMS host software changes
to red, then the UPJ-1P is operating above its 100º
C (212° F) maximum safe operating temperature.
Check to ensure that the UPJ-1P is properly
ventilated and/or decrease the loudspeaker’s audio
output signal immediately.

UNDERSTANDING THE RMS COMMUNICATION
MODULE'S USER PANEL

The RMS user panel is shown in Figure 3.3.

Figure 3.1. Commissioning a loudspeaker using RMS

Figure 3.3. The RMS user panel

The RMS user panel has three LEDs and two buttons. The
following sections describe their functions.

7

CHAPTER 3

Service LED (Red)

When blinking once every two seconds, the Service LED
indicates that the network hardware is operational, but the
loudspeaker is not installed (commissioned) on the network.
When a loudspeaker has been installed on the network
the, Service LED will be unlit and the Activity LED will ash
continuously.

NOTE: When continuously lit, the Service

LED indicates that the loudspeaker has had
a local RMS hardware failure. In this case, the RMS
communication module may be damaged and you
should contact Meyer Sound Technical support.

Service Button

Pressing the Service button will notify the corresponding
loudspeaker display icon on the RMS screen. When used in
combination with the Reset button, the card will be decom­missioned from the network and the red Service LED will
blink.

Reset Button

Pressing the Reset button will cause the rmware code
within the RMS card to reboot. However, the commission­ing state of the card will not change (this is stored in ash
memory). When used in combination with the Service But­ton, the card will be decommissioned from the network and
the red Service LED will blink.

Activity LED (Green)

When the loudspeaker has been commissioned, the Activity
LED will ash continuously. When the Activity LED is unlit
the loudspeaker has not been installed on the network.

NOTE: The LEDs and buttons on the user

panel of the RMS communication board
shown back in gure 3.3 are used exclusively by
RMS, and have no effect on the acoustical and/or
electrical activity of the UPJ-1P itself – unless MUTE
or SOLO is enabled at the board and from the RMS
software.

Wink LED (green)

When lit, the Wink LED indicates that an ID signal has been
sent from the host station computer to the loudspeaker.
This is accomplished using the Wink button on the loud­speaker Icon, Meter or Text views in the RMS monitoring
program.

Figure 3.4: Sample RMS display panel

USER INTERFACE

The RMS software features an intuitive, graphical Windows
user interface. As mentioned earlier, each loudspeaker
appears on the computer’s color monitor as a “view” in
the form of a status icon, bar graph meter, or text meter
(numerical values), depending on your preferences.

Each view contains loudspeaker identi­cation and data from the unit's amplier,
controller, drivers and power supply.
System status conditions cause chang­es in icon and bar graph indicators,
alerting the operator to faults or exces­sive levels. The views are moveable and
are typically arranged on the screen to
reect the physical layout of the loud­speakers. You can design a screen
“panel” of icons or meters, as shown in
Figure 3.4, and save it on the computer’s
hard disk, with the panel conveniently
named for a unique arrangement or
performer.

If the installation pattern changes com­pletely, a new screen panel can be built.
If a subset of installed loudspeakers will
be used for a subsequent event, only
selected loudspeakers need to appear
on screen for that performance.

8

!

CHAPTER 4: USING SUBWOOFERS WITH THE UPJ-1P

CHAPTER 4

A UPJ-1P loudspeaker system can be deployed in
combination with Meyer Sound self-powered USW-1P
compact and 650-P high-power subwoofers. These
subwoofers can achieve very low frequency response
extending system response appreciably and increasing
the overall acoustic power of a system in the lowest
frequencies. The USW-1P subwoofer extends system
frequency response down to 32 Hz, while the 650-P
subwoofers extends system frequency response down to
28 Hz.

In addition, the use of high-pass lters to drive a UPJ-1P
system with subwoofers attens overall frequency response
and slightly increases UPJ-1P headroom in the lowest end
of its usable spectrum.

The ideal ratio of UPJ-1P loudspeakers to subwoofers
depends on the conguration of the system, the application,
and the frequency content of the signal being reproduced.
For most applications, the following ratios yield good results
in frequency response and headroom:

 Two UPJ-1P loudspeakers for each USW-1P

 Four UPJ-1P loudspeakers for each 650-P

If two UPJs are used per 650-P, the 650-P should have 6 dB
of attenuation for at frequency response.

and polarity modules, make sure both are set to the same
polarity.

In the case of a UPJ-1P/650-P system, the 650-P employs
a polarity switch, so you will need to ensure that the 650-P
is set to pin 2 + (same with respect to a UPJ-1P loudspeak­er’s pin 2 +) when co-planar and in close-proximity to the
system.

CAUTION: Make sure that the source equip-

ment can drive the total load of the paralleled

system. (See the Audio Input section on page 5.)

NOTE: When a UPJ-1P loudspeaker and

a subwoofer are used in their full-range
conguration (e.g., looped audio or the same audio
feed), their polarities should be kept the same if
they are co-planar or near to each other. If they are
separated by a greater distance – or delay must be
used between them – a measurement system such
as Meyer Sound's SIM should be used to determine
the correct delay and polarity.

ADDING A LINE DRIVER

NOTE: The limit LEDs indicate when the safe

power level is exceeded. If the subwoofers
used in the system begin to limit before reaching the
required SPL at low frequencies, consider adding
more subwoofers to satisfy the SPL requirements
without exposing the drivers to excessive heat and/
or excursion.

There are three basic connection options for these system
congurations.

DAISY-CHAINED

When UPJ-1P loudspeakers and subwoofers are daisy­chained using the loop feature on the user panel, the result
will be a fairly at frequency response. However, the re­sponse will show a rise in the 60 to 200 Hz range where the
loudspeakers’ response overlaps at a ratio of two
UPJ-1Ps to each subwoofer.

Make sure the polarity of the UPJ-1Ps and the subwoof­ers are identical. In a UPJ-1P/USW-1P system, if both
the UPJ-1P and the USW-1P are tted with the standard
looping module, there is no polarity switch – both are set to
pin 2 +. However, if they are tted with looping, attenuation

Driving a UPJ-1P loudspeaker system and subwoofers with
the same signal from different outputs using a line driver
allows adjustments to the gain and polarity of each sub­system. This could be used effectively to compensate for
the ratio of loudspeakers or acoustical conditions. If gains
are adjusted to the same level, the combined response is
identical to a daisy-chain conguration with a rise in level in
the overlapping range.

NOTE: When driving UPJ-1P loudspeakers

from the Mid-Hi output of the LD-1A, LD-2 or
LD-3 line driver, with USW-1P or 650-P subwoofers
driven from the subwoofer output in their full-range
conguration, their polarities should be kept the
same if they are co-planar or near each other.

If the UPJ-1P loudspeakers and USW-1P or 650-P
subwoofers are separated by a greater distance – or
delay must be used between them – a measurement
system such as Meyer Sound SIM should be used
to determine the correct delay and polarity.

9

CHAPTER 4

Engaging the Lo-Cut lter

Using the LD-1A, LD-2 or LD-3 Lo-Cut lter (160 Hz posi­tion on the LD-3) with a system comprising UPJ-1P loud­speaker and subwoofers in close proximity and co-planar
will produce a very at frequency response with a minimal
area of overlap. The UPJ-1P loudspeakers in the system
receive their signal following a high-pass lter, while the
subwoofers apply their normal internal crossover frequen­cies to a full range signal. To achieve this at response, the
subwoofers need to have their polarity reversed.

TIP: The atness of the response is, in any

case, dependent on proximity to boundary

surfaces.

While the change of polarity with respect to a daisy-chained
conguration is needed due to the phase shift caused by
the high-pass lter at overlapping frequencies, placing sub­woofers more than 4 feet apart from UPJ-1P loudspeakers
may require reversing the polarities once again to compen­sate for the delay propagation.

NOTE: When driving UPJ-1P loudspeak-

ers from the Mid-Hi output of the LD-1A or
LD-2 line driver — with the Lo-Cut lter engaged,
and 650-P or USW-1P subwoofers in their full-range
conguration — their polarities should be reversed if
they are co-planar or near each other. The simplest
way to achieve this is engaging the “reverse polar­ity" switch in the sub output of the line driver.

delay errors when the DSP is near maximum throughput,
which becomes more likely as the number of lters in use in
the DSP is using increases.

In no case should a lter higher than 2nd order be used.
The additional phase shift introduced deteriorates the im­pulse response and higher roll-off does not improve cross­over interaction. In fact, it is highly recommended that the
crossover/lter is set to emulate the low-cut LD-1A/LD-2
and LD-3 (160 Hz position) characteristics themselves, as
shown in Table 4.1.

Table 4.1: LD-1/LD-2/LD-3 Lo-Cut Filter Parameters

Type Order Pole Frequency Q

High Pass 2nd (-12dB/oct) 162 Hz 0.82*

*If the DSP does not have variable Q for high-pass lters, the lter should be
set to “Butterworth” (Q ≈ .7).

If the loudspeakers are going to be driven directly from DSP,
verify that the outputs of the processor have the driving ca­pabilities to drive the total load presented by the loudspeak­ers connected to it.

NOTE: When precise array design, subwoof-

er integration, DSP and delay systems, and
compensation for acoustical conditions all come
into play, measurement and correction tools are a
must. Meyer Sound’s SIM measurement system
and the CP-10 parametric equalizer are both highly
recommended.

If your UPJ-1P loudspeakers and 650-P or USW-1P
subwoofers are separated by a greater distance - or
delay must be used between them - a measurement
system such as SIM should be used to determine
the correct delay and polarity.

DIGITAL SIGNAL PROCESSORS

Full-range signals may be applied to Meyer Sound’s self­powered loudspeakers because they have built-in active
crossover circuits; external crossovers and digital signal
processors (DSP) are optional and should be used very
carefully as phase shifts can cause destructive cancella­tions.

If DSP is used, both UPJ-1P loudspeakers and subwoofers
should be fed from the DSP in order to keep their delay time
the same. Otherwise you may experience phase shift differ­ences between the UPJ-1P loudspeakers and the subwoof­ers. In addition, you should verify the delay time between
channels: Some DSPs may develop channel-to-channel

10

CHAPTER 5: SYSTEM DESIGN AND INTEGRATION

CHAPTER 5

Meyer Sound offers two comprehensive tools to assist you
with the acoustical and functional requirements of system
design and optimization. The chapter introduces you to
Meyer Sound MAPP Online® - a powerful online acoustical
prediction tool – and SIM®, a robust instrumentation
package for system measurement, analysis, and more.

MEYER SOUND MAPP ONLINE

MAPP Online is a powerful, cross-platform, Java-based
application for accurately predicting the coverage pattern,
frequency response, impulse response, and maximum SPL
output of single or arrayed Meyer Sound loudspeakers.

As its name indicates, MAPP Online is an online application:
when a prediction is requested, data is sent over the
Internet to a high-powered server at Meyer Sound that
runs a sophisticated acoustical prediction algorithm using
high-resolution, complex (magnitude and phase) polar data.
Predicted responses are returned over the Internet and
displayed on your computer in color.

With MAPP Online, you can:

 Plan an entire portable or xed loudspeaker system and

determine delay settings for ll loudspeakers.

 Clearly see interactions among loudspeakers and

minimize destructive interference.

 Place microphones anywhere
in the sound eld and predict
the frequency response, impulse
response, and sound pressure level at
the microphone position using MAPP
Online’s Virtual SIM feature.

 Rene your system design to
provide the best coverage of the
intended audience area.

 Use a virtual VX-1 program
equalizer to predetermine the correct
control settings for best system
response.

Figure 5.1. MAPP Online is an intuitive, powerful system design tool

Residing on your computer, MAPP Online facilitates
conguring arrays of a wide variety of Meyer Sound
products and, optionally, denes the environment in which
they will operate, including air temperature, pressure, and
humidity, as well as the location and composition of walls.
You can nd MAPP Online at:

www.meyersound.com/products/software/mapponline

NOTE: In order to use MAPP Online, you

will need to register by clicking “Apply for
MAPP Online” on the website listed above. After
registration and upon approval, an e-mail will be
sent to you with a username and password along
with the address for the website where you can
download MAPP Online. Online instructions will
guide you through the download and setup process.

 Gain valuable load information
about the array to determine rigging
capacities.

MAPP Online enables you to
come to an installation prepared
with a wealth of information that

ensures the system will satisfy your
requirements “out of the box” – including basic system
delay and equalization settings. Its accurate, high-resolution
predictions eliminate unexpected onsite adjustments
and coverage problems. With MAPP Online, every sound
system installation has a maximum chance of success.

MAPP Online is compatible with Windows, Linux, Unix,
and Apple Macintosh computers running Mac OS X version

10.1.2 or higher. The MAPP Online Web page above lists
additional system requirements and recommendations.

11

CHAPTER 5

SIM MEASUREMENT SYSTEM

SIM is a measurement and instrumentation system
including a selection of hardware and software options,
microphones and accessory cables. SIM is optimized for
making audio frequency measurements of an acoustical
system with a resolution of up to 1/24 of an octave; the
high resolution enables you to apply precise electronic
corrections to adjust system response using frequency and
phase (time) domain information.

Source Independent Measurement Technique

SIM implements the Meyer Sound source independent
measurement technique, a dual-channel method that
accommodates statistically unpredictable excitation signals.
Any excitation signal that encompasses the frequency range
of interest (even intermittently) may be used to obtain highly
accurate measurements of acoustical or electronic systems.
For example, concert halls and loudspeaker systems may
be characterized during a musical performance using the
program as the test signal, allowing you to:

 View measurement data as amplitude versus time

(impulse response) or amplitude and phase versus
frequency (frequency response)

Applications

The main application of SIM is loudspeaker system testing
and alignment. This includes:

 Measuring propagation delay between the subsystems

to set correct polarities and set very precise delay times

 Measuring variations in frequency response caused

by the acoustical environment and the placement
and interaction of the loudspeakers to set corrective
equalization

 Optimizing subwoofer integration

 Optimizing loudspeaker arrays

SIM can also be used in the following applications:

 Microphone calibration and equalization

 Architectural acoustics

 Transducer evaluation and correction

 Echo detection and analysis

 Vibration analysis

 Underwater acoustics

 Utilize a single-channel spectrum mode

 View frequency domain data with a logarithmic

frequency axis

 Determine and internally compensate for propagation

delays using SIM Delay Finder function

12

CHAPTER 6: ROTATING THE VARIO HORN

CHAPTER 6

You can easily re-orient the UPJ-1P’s VariO rotatable horn
to its 80º or 50º conguration and back again. To rotate the
UPJ-1P’s horn, perform the following steps:

1. Remove the four (4) 10-32 x 5/8" grille cover screws
(two from the top and two from the bottom) from the
UPJ-1P.

2. Carefully remove the grille.

3. Remove the four (4) 10-32 x 1" horn ange screws.

4. Gently pull the VariO horn from the UPJ-1P cabinet, be­ing careful not to over-stress its wiring.

6. Place the horn back into the cabinet. It will t comfort­ably snug.

7. Replace the four (4) 10-32 x 1" horn ange screws and
the four (4) 10-32 x 5/8" grille cover screws.

5. Rotate the horn 90º clockwise to change it from its 80º
orientation to 50º. The wider ange around the horn’s
frame will now be along the sides of the frame instead
of the top and bottom (Figure 6.1).

80° 50°

Figure 6.1. The VariO horn at 80° x 50° for wide horizontal coverage (left)
and rotated to 50° x 80° for narrow horizontal coverage (right)

13

CHAPTER 6

14

!

!

!

!

!

CHAPTER 7: QUICKFLY RIGGING

CHAPTER 7

The UPJ-1P features Meyer Sound’s QuickFly rigging sys­tem with rugged, reliable and deceptively simple compo­nents. QuickFly facilitates placing UPJ-1P loudspeakers
from single units (hanging or attached to a surface) to con­structing rigid, ground-stacked or own UPJ-1P arrays. The
UPJ-1P has integral top and bottom plates made of heavy
duty, high-strength, corrosion-resistant 6061-T6 aluminum
with threaded metric holes for use with QuickFly rigging and
third-party accessories.

NOTE: The threads of the MEP-UPJ end

plates are metric for M8 screws.

CAUTION: It is important to inspect rigging

hardware regularly and replace worn or dam-

aged components immediately.

CAUTION: All Meyer Sound products must

be used in accordance with local, state, fed­eral and industry regulations. It is the owner’s and/or
user’s responsibility to evaluate the reliability of any
rigging method for their application. Rigging should
be carried out only by experienced professionals.

BASIC RIGGING CONFIGURATIONS

The UPJ-1P ships with two M8 threaded, 20 mm eyebolts
(including rubber washers), suitable for hanging the loud­speaker using either a single- or two-hole conguration.

The single-hole conguration is the simplest way to support
one UPJ-1P cabinet (Figure 7.1).

Eyebolt

Top of loudspeaker

Front of
loudspeaker

Figure 7.1. Single-hole conguration

The two-hole conguration (Figure 7.2) is recommended
over the single point. This conguration provides more
safety, stability, and exibility for aiming and tilting the UPJ­1P for targeted horizontal and vertical coverage.

CAUTION: Always use properly rated rigging

hardware.

Figure 7.2. Two-hole conguration

CAUTION: Make sure that the eyebolts and

bolts are tightened securely. Meyer Sound
recommends using Loctite® on the eyebolt threads
and/or a safety cable.

CAUTION: Congurations using the

UPJ-1P’s eyebolt(s) do not support more
than two UPJ-1Ps at a 7:1 safety factor.

15

CHAPTER 7

17

CHAPTER 7

POLE-MOUNTING THE UPJ-1P, SINGLE UNIT

You can pole-mount the UPJ-1P (Figure 7.3) using a third
party pole-mount adapter. The two holes used for attaching
eyebolts in a basic double-hole conguration (discussed
above) can also be used to attach a pole mount adapter.

Pole mount
adapter

Bottom of
loudspeaker

Front of
loudspeaker

Wall Mount

The MLB-UPJ allows you to mount the UPJ-1P in both a
vertical (Figure 7.5) and horizontal orientation (Figure 7.6)
for wall mounting.

Adjustable slot

Top of
loudspeaker

MLB-UPJ

L-bracket

Front of loudspeaker

Figure 7.5. Vertically wall-mounting the UPJ-1P

Figure 7.3. Attaching a pole mount adapter (shown upside down)

Several manufacturers offer pole-mount adapters that will t
the UPJ-1P, such as the Ultimate Support System’s
(www.ultimatesupport.com) BMB-200K large tripod mount­ing bracket.

USING THE MLB-UPJ L-BRACKET

A pair of MLB-UPJ L-brackets (Figure 7.4) allows the UPJ­1P loudspeaker to be mounted to a wall, ceiling, or oor.
The kit includes two M8 bolts and two rubber washers.

Figure 7.6. Horizontally wall-mounting the UPJ-1P

Ceiling Mount

For mounting the UPJ-1P on a ceiling, underbalcony or
canopy area, the MLB-UPJ L-bracket is effective and stable
(Figure 7.7).

Figure 7.4. MLB-UPJ L-bracket

A single MLB-UPJ L-bracket can be oriented toward or
away from the loudspeaker, providing maximum exibility
for positioning and securing the L-bracket according to the
needs of the design and/or the venue.

16

Figure 7.7. Ceiling-mounting the UPJ-1P

CHAPTER 7

!

!

!

Floor Mount

The MLB-UPJ can also be used to mount the UPJ-1P on
the oor or stage lip, which is useful for monitoring or front­ll applications, for example (Figure 7.8).

Figure 7.8. Floor-mounting the UPJ-1P

TIP: In any conguration, the MLB-UPJ’s

adjustment slot can be used to increase or
decrease the distance to the mounting surface and
achieve the desired angle of the UPJ-1P.

MYA-UPJ MOUNTING YOKE ASSEMBLY

This cradle-style mounting yoke (Figure 7.9) suspends a
single UPJ-1P loudspeaker and allows a wide range of
horizontal and vertical adjustment. The MEP-UPJ end plate
attaches to the MYA-UPJ's bar using two M8 mounting
screws (included). A hanging clamp (“C” or “G” type) and
a steel safety cable are required to enable the yoke to be
used (not supplied as a part of the yoke assembly kit).

CAUTION: Always use mounting hardware

appropriate for the construction of the
surface where the MLB-UPJ will be installed.

CAUTION: Always use mounting and rigging

hardware that has been rated to meet or
exceed the weight being hung.

CAUTION: Make sure that the eyebolts and

bolts are tightened securely.

Figure 7.9. The MYA-UPJ is used to suspend a single UPJ-1P cabinet

USING THE MAA-UPJ ARRAY ADAPTER

The MAA-UPJ array adapter (Figure 7.10) allows you to in­stall multiple UPJ-1Ps in both horizontal and vertical arrays.
The kit includes two plates, eight M8 screws and rubber
washers.

Figure 7.10. MAA-UPJ array adapter

17

CHAPTER 7

19

CHAPTER 7

!

!

Horizontal Array

The MAA-UPJ array adapter provides a solid connection
between multiple loudspeakers to form a horizontal array.
The front adjustment slot is used to increase or decrease
the distance between the front of the loudspeakers and
achieve the desired angle between UPJ-1P loudspeakers.
The splay angle can be adjusted continuously from 20°
(minimum) to 80° (maximum).

TIP: To create optimum coverage in a

horizontal array, the splay between UPJ-1P
speakers should be 50° when the horns are in the
80° horizontal by 50° vertical position. Angles of less
than 50° between cabinets can create too much
interaction between loudspeakers, while angles
greater than 50° may create holes in the coverage.
For example, a horizontal array of three UPJ-1Ps
splayed 50° will have an optimal horizontal coverage
of 160° horizontal by 50° vertical.

Pole-Mounting a Horizontal Array

You can pole-mount a horizontal array of two UPJ-1P
loudspeakers using a third party pole-mount adapter (Figure

7.11). Several manufacturers offer pole-mount adapters
that will t the MAA-UPJ array adapter, such as Ultimate
Support System’s (www.ultimatesupport.com) BMB-200K
large tripod mounting bracket.

Flying a Horizontal Array

Eyebolts can be also attached to the MEP-UPJ end plate
or to the MAA-UPJ to provide pick-up holes for ying a
horizontal array (Figure 6.12). In addition, the MAA-UPJ’s
rear pick-up holes can be used for additional support or
better control over vertical coverage of the array.

Pole mount
adapter

Bottom of
loudspeaker

Array adapter

Figure 7.11. A pole-mounted horizontal array of two UPJ-1Ps (shown

upside down)

CAUTION: Do not exceed the load rating of

the pole-mount adapter and tripod. Two UPJ-

1P and array adapters are close to 100 lbs (45.36 kg).

Figure 7.12. Horizontal array of 3 UPJ-1Ps

Vertical Array

The MAA-UPJ array adapter also provides a solid
connection between multiple loudspeakers to form a
vertical loudspeaker array with two or three cabinets. The
front adjustment slot is used to increase or decrease the
distance between the front of the loudspeakers and achieve
the desired angle between the UPJ-1P loudspeakers. The
splay angle can be from 20° (minimum) to 80° (maximum).
In addition, the MAA-UPJ’s rear pickup holes can be used
to provide additional support or better control over the
vertical splay between cabinets.

CAUTION: Always use mounting and rigging

hardware that has been rated to meet or

exceed the weight being hung.

18

CHAPTER 7

Ceiling Mounting a Vertical Array

In the vertical array conguration (Figure 7.13), the top
cabinet is mounted to the ceiling using the MLB-UPJ L­bracket.

Flying a Vertical Array

Eyebolts can be also attached to the MAA-UPJ to provide
pick-up holes for ying a vertical array. In addition, the
MAA-UPJ’s rear pick-up holes can be used for additional
support or better control over vertical coverage of the array
(Figure 7.14).

Figure 7.13. Mounting a vertical array of UPJ-1Ps using the MAA-UPJ

and the MLB-UPJ

Figure 7.14. Mounting a vertical array of three UPJ-1Ps using the

eyebolts in the top cabinet

TIP: To create optimum coverage in a

vertical array the splay between UPJ-1P
speakers should be 30° when the horns are in the
80° horizontal by 50° vertical position. Angles of
less than 30° between cabinets can create too
much interaction between loudspeakers and angles
greater than 30° can create holes in the coverage.
For example, a vertical array of three UPJ-1Ps
splayed 30° will have a optimal horizontal coverage
of 80° horizontal by 100° vertical.

19

CHAPTER 7

20

APPENDIX A

APPENDIX A

BASIC TROUBLESHOOTING

This section contains possible solutions to some common
problems encountered by UPJ-1P users and is not intended
to be a comprehensive troubleshooting guide.

The On/Temp. LED does not illuminate and there
is no audio.

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 90 - 264 V AC.

3. Call Meyer Sound Technical Support.

The On/Temp. LED is illuminated green but there
is no sound.

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 loudspeaker 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 loudspeaker.

The audio produced by the loudspeaker 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 loudspeaker 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 loudspeaker is highly
compressed and the limit light is constantly yel­low.

1. Turn down the level of the input signal to the speaker
system.

The On/Temp. LED is illuminated red.

This occurs in conditions where the heatsink temperature
reaches 85°C (185°F), indicating that the amplifier is ther­mally overloaded.

1. Turn down the level of the input signal to the loud­speaker system.

2. Make sure the fan is working properly.

3. Make sure there is sufficient air flow around the unit.

4. Avoid exposing the heatsink to direct sunlight if the
ambient temperature is high.

See the Amplification and Limiting, and Amplifier Cooling
System sections on page 6 for a complete discussion about
the cooling system.

1. Disconnect the audio input. If the noise persists, the
problem is within the loudspeaker. In this case return
the unit to the factory or nearest authorized service cen­ter. If the hum ceases, the noise originates somewhere
earlier in the signal path.

2. Make sure the XLR cable is securely fastened to the
XLR audio input connector.

3. Send the audio signal to another loudspeaker 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.

4. Hum or noise can be produced by a ground loop. Since
the UPJ-1P is effectively ground-lifted, the loop must be
broken elsewhere in the system.

Only the high or low drivers seem 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 loudspeaker 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 sound.

3. Use a sine wave and/or pink noise generator to send a
variety of frequencies to the loudspeaker.

21

APPENDIX A

22

APPENDIX B

UPJ-1P SPECIFICATIONS

ACOUSTICAL

Operating frequency range 55 Hz - 20 kHz

Note: Recommended maximum operating frequency range. Response depends upon
loading conditions and room acoustics.

Free eld frequency
response

Phase response ±45° 750 Hz to 18 kHz
Maximum peak SPL 128 dB

Dynamic range >110 dB
Coverage 80° x 50°

Acoustical crossover 2 kHz

TRANSDUCERS

Low frequency One 10" cone driver with neodymium magnet

High frequency One 3" compression driver

Note: The driver is coupled to an 80° x 50° constant-directivity horn.

66 Hz - 18 kHz ±4 dB

Note: Measured with 1/3 octave frequency resolution at 4 meters.

Note: Measured with music at 1 meter.

Note: The UPJ horn can be rotated to provide an 80° x 50° coverage pattern in either the

horizontal or vertical plane.

Note: At this frequency, the transducers produce equal sound pressure levels.

Nominal impedance: 4 Ω
Voice coil size: 2"
Power-handling capability: 400 W (AES)

Note: Power handling is measured under AES standard conditions: transducer driven
continuously for two hours with band limited noise signal having a 6 dB peak-average ratio.

Nominal impedance: 16 Ω
Voice coil size: 3"
Diaphragm size: 3"
Exit size: 0.75"
Power-handling capability: 100 W (AES)

Note: Power handling is measured under AES standard conditions: transducer driven
continuously for two hours with band limited noise signal having a 6 dB peak-average ratio.

APPENDIX B

AUDIO INPUT

Type Differential, electronically balanced
Max. common mode range ±15 V DC, clamped to earth for voltage transient protection
Connectors Female XLR input with male XLR loop output
Input impedance 10 kΩ differential between pins 2 and 3
Wiring Pin 1: Chassis/earth through 220 kΩ, 1000 pF, 15 V clamp network to provide virtual

ground lift at audio frequencies
Pin 2: Signal +
Pin 3: Signal -

Case: Earth ground and chassis
DC Blocking Differential DC blocking on input up to max. common mode voltage
CMRR >50 dB, typically 80 dB (50 Hz – 500 Hz)
RF lter Common mode: 425 kHz; Differential mode: 142 kHz
TIM lter <80 kHz, integral to signal processing
Nominal input sensitivity 0 dBV (1 V rms, 1.4 V pk) continuous average is typically the onset of TPL limiting for noise

and music.

23

APPENDIX B

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



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















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Input level Audio source must be capable of producing a minimum of +20 dBV (10 V rms, 14 V pk) into

600 Ω to produce maximum peak SPL over the operating bandwidth of the loudspeaker.

AMPLIFIERS

Amplier type Two-channel complementary power MOSFET output stages (class AB)
Output power 300 W total

Note: Wattage rating is based on the maximum unclipped burst sine-wave rms voltage the
amplier will produce into the nominal load impedance — low and high channels 30 V rms

(42 V pk) into load impedance
THD, IM TIM < .02%
Load capacity 4 Ω low channel, 16 Ω high channel
Cooling Forced air cooling over amplifier heatsink

AC POWER

AC power connector PowerCon with looping output
Voltage selection Automatic
Safety agency rated

100 V AC - 240 V AC; 50/60 Hz
operating voltage

Turn on/turn off points 90 V AC to 264 V AC; 50/60 Hz

Note: No automatic turn-off voltages. Voltages above 265 V AC are fuse protected but

may cause permanent damage to the power supply. Voltages below 90 V AC may result in

intermittent operation.

Current Draw

Idle current 0.41 A rms (115 V AC); 0.33 A rms (230 V AC); 0.42 A rms (100 V AC)
Max. long-term continuous

3.2 A rms (115 V AC); 1.6 A rms (230 V AC); 3.7 A rms (100 V AC)

current (>10 sec)
Burst Current (<1 sec) 5.0 A rms (115 V AC); 2.5 A rms (230 V AC); 5.8 A rms (100 V AC)
Note: Current draw for a single loudspeaker. Loop out not used.
Ultimate Short-Term Peak

17 A pk (115 V AC); 8.5 A pk (230 V AC); 20 A pk (100 V AC)
Current Draw

Inrush Current 15 A pk (115 V AC); 13 A pk (230 V AC); 15 A pk (100 V AC)

PHYSICAL

Enclosure Multi-ply hardwood
Finish Black textured
Protective grille Powder-coated hex stamped steel
Rigging QuickFly rigging options
Dimensions 11.15" W x 22.43" H x 12.25" D (283 mm x 570 mm x 311 mm)
Weight 46.00 lbs (20.87 kg)

24

Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
USA

T: +1 510 486.1166
F: +1 510 486.8356
[e-mail]
www.meyersound.com

Meyer Sound Laboratories, Inc.

© 2003

All Rights Reserved