Meyer Sound 1100-LFC Instructions

OPERATING INSTRUCTIONS

1100-LFC Low-Frequency Control Element

LF

Keep these important operating instructions.

Check www.meyersound.com for updates.

©2013, 2016, 2019
Meyer Sound. All rights reserved.
1100-LFC Operating Instructions, PN 05.220.005.01 B4

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.

Compass RMS, GuideALink, Intelligent AC, LEO-M, LYON, MAPP, RMS, RMServer, and all alpha-numeric designations for Meyer Sound
products and accessories are trademarks of Meyer Sound. Galileo, LEO, Meyer Sound, the Meyer Sound wave logo,
QuickFly, REM, SIM, and TruPower 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.

ii

1100-LFC OPERATING INSTRUCTIONS

!

!

IMPORTANT SAFETY INSTRUCTIONS

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

SYMBOLS USED

Dangerous voltages:

risk of electric shock

Gefährliche

Spannungen:

Stromschlaggefahr

Pour indiquer les

risques

résultant de tensions

dangereuses

Para indicar voltajes

peligrosos

Important operating

instructions

Hinweis auf wichtige

Punkte der

Betriebsanleitung

Instructions d'utilisation

importantes

Instrucciones

importantes

de funcionamiento y/o

Mantenimiento

Replaceable Fuse Protective earth ground Hot surface: do not

Austauschbare

Fusible remplaçable Terre de protection Surface chaude:

Fusible reemplazable Toma de tierra de

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with dry cloth.

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

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 grounding-type
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 fit 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 apparatus. The
AC mains plug or appliance coupler shall remain readily
accessible for operation.

touch

Sicherung

Schutzerde Heiße Oberfläche:

protección

nicht berühren

ne pas toucher

Superficie caliente:

no tocar

11. Only use attachments/accessories specified by Meyer
Sound.

12. Use only with the caster rails or rigging specified by
Meyer Sound, or sold with the apparatus. Handles are
for carrying only.

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

14. If equipped with an external fuse holder, the replaceable
fuse is the only user-serviceable item. When replacing
the fuse, only use the same type and the same value.

15. Refer all other servicing to qualified service personnel.
Servicing is required when the apparatus 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 apparatus; rain or moisture
has entered the apparatus; the apparatus has been
dropped; or when for undetermined reasons the appara­tus does not operate normally.

WARNING: To reduce the risk of fire or electric

shock, do not expose this apparatus to rain or
moisture. Do not install the apparatus in wet or humid
locations without using weather protection equip­ment from Meyer Sound.

iii

IMPORTANT SAFETY INSTRUCTIONS

!

PowerCon Use

CAUTION: Disconnect the mains plug before

disconnecting the power cord from the loud-

speaker.

English

• To reduce the risk of electric shock, disconnect the
apparatus from the AC mains before installing audio
cable. Reconnect the power cord only after making all
signal connections.

• Connect the apparatus 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 apparatus 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
apparatus. Do not put objects containing liquid on or
near the apparatus.

• To reduce the risk of overheating the apparatus, avoid
exposing it to direct sunlight. Do not install the apparatus
near heat-emitting appliances, such as a room heater or
stove.

• If equipped with an external fuse holder, the replaceable
fuse is the only item that can be serviced by the user.
When replacing the fuse, only use the same type and
value.

• This apparatus contains potentially hazardous voltages.
Do not attempt to disassemble the apparatus. The only
user-serviceable part is the fuse if so equipped. All other
repairs should be performed only by factory-trained ser­vice personnel.

Deutsch

• Zur Minimierung der Gefahr eines elektrischen Schlages
trennen Sie das Produkt vor dem Anschluss von Audio­und/oder Steuerleitungen vom Stromnetz. Das Netzka­bel darf erst nach Herstellung aller Signalverbindungen
wieder eingesteckt werden.

• Das Produkt an eine vorschriftsgemäss installierte
dreipolige Netzsteckdose (Phase, Neutralleiter, Schut­zleiter) anschließen. Die Steckdose muss vorschrifts­gemäß mit einer Sicherung oder einem
Leitungsschutzschalter abgesichert sein. Das

Anschließen des Produkts an eine anders ausgeführte
Stromversorgung kann gegen Vorschriften verstossen
und zu Stromunfällen führen.

• Das Produkt nicht an einem Ort aufstellen, an dem es
direkter Wassereinwirkung oder übermäßig hoher Luft­feuchtigkeit ausgesetzt werden könnte, solange es sich
nicht um ein Produkt handelt, dass mit der Meyer Sound
Weather Protection Option ausgestattet ist.

• Vermeiden Sie das Eindringen von Wasser oder Fremd­körpern in das Innere des Produkts. Stellen Sie keine
Objekte, die Flüssigkeit enthalten, auf oder neben dem
Produkt ab.

• Um ein Überhitzen des Produkts zu verhindern, halten
Sie das Gerät von direkter Sonneneinstrahlung fern und
stellen Sie es nicht in der Nähe von wärmeabstrahlenden
Geräten (z.B. Heizgerät oder Herd) auf.

• Bei Ausstattung mit einem externen Sicherungshalter ist
die austauschbare Sicherung das einzige Gerät, das vom
Benutzer gewartet werden kann. Verwenden Sie beim
Austausch der Sicherung nur den gleichen Typ und
Wert.

• Dieses Gerät enthält möglicherweise gefährliche Span­nungen. Versuchen Sie nicht, das Gerät zu zerlegen. Der
einzige vom Benutzer zu wartende Teil ist die Sicherung,
falls vorhanden. Alle anderen Reparaturen dürfen nur von
im Werk geschultem Servicepersonal ausgeführt
werden.

Français

• Pour éviter tout risque d’électrocution, débranchez
l’enceinte de la prise secteur avant de mettre en place le
câble audio.Ne rebranchez le cordon secteur qu’après
avoir procédé à toutes les connexions de signal audio

• Branchez l’enceinte sur une prise murale à deux fiches et
trois conducteurs avec terre. Cette prise doit être reliée à
une ligne électrique protégée par un fusible ou un court­circuit. Utiliser une prise murale de type différent crée
des risques d’électrocution, et peut enfreindre des régle­mentations électriques locales.

• N’installez pas l’enceinte dans des endroits humides ou
en présence d’eau sans utiliser d’équipements de pro­tection adéquats fournis par Meyer Sound.

• Ne laissez pas d’eau ou d’objet étranger, quel qu’il soit,
pénétrer à l’intérieur de l’enceinte. Ne posez pas d’objet
contenant du liquide sur ou à proximité de l’enceinte.

iv

1100-LFC OPERATING INSTRUCTIONS

• Pour réduire les risques de surchauffe, évitez d’exposer
directement l’enceinte aux rayons du soleil. Ne l’installez
pas à proximité de sources de chaleur, radiateur ou four
par exemple.

• S'il est équipé d'un porte-fusible externe, le fusible rem­plaçable est le seul élément qui peut être réparé par
l'utilisateur. Lors du remplacement du fusible, n'utilisez
que le même type et la même valeur.

• Cet appareil contient des tensions potentiellement dan­gereuses. N'essayez pas de démonter l'appareil. La
seule pièce pouvant être réparée par l'utilisateur est le
fusible, s'il en est équipé.Toutes les autres réparations
doivent être effectuées uniquement par du personnel de
maintenance formé en usine.

Español

• Para reducir el riesgo de descarga eléctrica, desconecte
el aparato de la red eléctrica antes de instalar el cable de
audio. Vuelva a conectar el cable de alimentación sólo
después de realizar todas las conexiones de señal.

• Conecte el aparato a una toma de corriente de dos polos
y tres hilos con conexión a tierra. El receptáculo debe
estar conectado a un fusible o disyuntor. La conexión a
cualquier otro tipo de receptáculo representa un riesgo
de descarga eléctrica y puede violar los códigos eléctri­cos locales.

Todas las demás reparaciones deben ser realizadas úni­camente por personal de servicio capacitado de fábrica.

• No instale el aparato en lugares húmedos o mojados sin
usar el equipo de protección contra intemperie de Meyer
Sound.

• No permita que penetre agua u otros objetos extraños
en el interior del aparato. No coloque objetos que con­tengan líquido sobre o cerca de la unidad.

• Para reducir el riesgo de sobrecalentamiento del
aparato, evite exponerlo a la luz solar directa. No instale
la unidad cerca de aparatos que emitan calor, como un
calefactor o una estufa

• Si está equipado con un portafusibles externo, el fusible
reemplazable es el único elemento que puede ser repa­rado por el usuario. Cuando reemplace el fusible, use
solamente el mismo tipo y valor.

• Este aparato contiene voltajes potencialmente peligro­sos. No intente desmontar la unidad. La única pieza que
el usuario puede reparar es el fusible si equipado con él.

v

IMPORTANT SAFETY INSTRUCTIONS

vi

CONTENTS

1100-LFC OPERATING INSTRUCTIONS

Important Safety Instructions iii

Symbols Used iii

Chapter 1: Introduction 9

How to Use This Manual 9
1100-LFC Low-Frequency Control Element 9

Chapter 2: Power Requirements 11

AC Power Distribution 11
AC Input 11
Wiring AC Power Cables 13
1100-LFC Voltage Requirements 13
1100-LFC Current Requirements 13
Do Not Reset Circuit Breakers! 14
Intelligent AC Power Supply 14
Electrical Safety Guidelines 14

Chapter 3: Amplification and Audio 17

Audio Connectors 17
Cable Rings 18
TruPower Limiting 18
Amplifier Cooling System 19

Chapter 4: QuickFly Rigging 21

Important Safety Considerations! 21
1100-LFC Rigging Options 21
Groundstacking 1100-LFC Loudspeakers 22
1100-LFC Cardioid Arrays 22
MRK-1100 Rigging Kit 22
1100-LFC GuideALinks 23
MAS-1100 Array Spacer 24

Chapter 5: RMS Remote Monitoring System 25

Compass RMS Software 25
RMS Module 25
Neuron ID for RMS Module 26
Resetting the RMS Module 26

Chapter 6: System Design and Integration Tools 27

MAPP System Design Tool 27
SIM Measurement System 28

Appendix A: Meyer Sound Weather Protection 29

Weather Protection Components 30
Installation Practices 30
IP Ratings 31

vii

Appendix B: Rain Hoods 33

Expanding the 1100-LFC Collapsible Rain Hood 33

Appendix C: Specifications 35

1100-LFC Dimensions 37

viii

CHAPTER 1: INTRODUCTION

!

HOW TO USE THIS MANUAL

Make sure to read these instructions in their entirety before
configuring a Meyer Sound loudspeaker system. In
particular, pay close attention to material related to safety
issues.

As you read these instructions, you will encounter the
following icons for notes, tips, and cautions:

NOTE: A note identifies an important or useful

piece of information relating to the topic under

discussion.

1100-LFC OPERATING INSTRUCTIONS

Figure 1: 1100-LFC Low-Frequency Control Element

TIP: A tip offers a helpful tip relevant to the

topic at hand.

CAUTION: A caution gives notice that an

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

Information and specifications are subject to change.
Updates and supplementary information are available at

www.meyersound.com

.

Meyer Sound Technical Support is available at:

• Te l: +1 510 486.1166

• Te l: +1 510 486.0657 (after hours support)

• Web: www.meyersound.com/support

1100-LFC LOW-FREQUENCY CONTROL ELEMENT

The 1100-LFC low-frequency control element (Figure 1) is a
self-powered loudspeaker defined by its sonic linearity in
reproducing low-frequency transients at high, continuous
output levels with very low distortion. This ultralow distortion,
coupled with exceptional headroom and optimized rigging
options, makes the 1100-LFC a flexible tool for low-end
directional applications for large-scale tours and
installations.

To guarantee optimum performance, 1100-LFC systems
must be designed with Meyer Sound’s MAPP
software. The intuitive, cross-platform application accurately
predicts directional patterns, frequency and impulse
responses, and maximum peak SPL for 1100-LFC systems,
ensuring that systems deliver the required coverage and SPL.

™

prediction

An optimally tuned, vented cabinet houses the 1100-LFC’s
two linear, high-excursion 18-inch cone drivers. The
loudspeaker’s 28 Hz to 100 Hz operating frequency range
complements LEO-M

™

, LYON™, and other Meyer Sound
loudspeakers, allowing it to integrate seamlessly with line
arrays and curvilinear arrays.

The unit’s onboard power amplifier operates at nominal
voltages from 165–264 V AC at 50–60 Hz. TruPower

®

limiting
ensures maximum driver protection, minimizing power
compression while yielding high constant output under high
continuous and peak power conditions. The amplifier, control
electronics, and power supply are contained in a single field­replaceable module located on the rear of the cabinet.

Protective plastic skids are included on the bottom of the
1100-LFC cabinet that securely align with the cabinet’s top
slots. Units can be stacked normally or reversed for cardioid
configurations.

The optional MRK-1100 rigging kit, available as a factory­installed option or field upgrade, includes captive
GuideALinks that allow the loudspeaker to be flown from the

MTG-1100 top grid (Figure 2). The GuideALinks, located at
the front and rear of the cabinet, are easily set with
convenient, pinned handles and slots. The GuideALinks also
accommodate reversed units for flown cardioid arrays.

With some restrictions, the optional MTG-1100 top grid can
suspend line arrays comprised of up to 16 cabinets at a 5:1
safety factor, or up to 12 cabinets at a 7:1 safety factor. The
optional MAS-1100 array spacer can be placed between
cabinets to lengthen 1100-LFC arrays, improving vertical
directionality.

9

CHAPTER 1: INTRODUCTION

Figure 2: MTG-1100 Top Grid with 1100-LFC Array

For touring and portable systems, the 1100-LFC can travel
securely in stacks of three units with the optional MCF-1100
caster frame (Figure 3). Durable nylon covers,
accommodating stacks of two or three units, are optionally
available to ensure the 1100-LFC is completely road ready.

Figure 3: MCF-1100 Caster Frame with 1100-LFC Stack

Meyer Sound’s RMS

™

remote monitoring system comes
standard with all 1100-LFC loudspeakers and provides
comprehensive monitoring of system parameters on a Mac
or Windows

®

-based computer. Convenient XLR 5-pin
connectors allow the use of composite cables carrying both
RMS and balanced audio. XLR 3-pin audio connectors are
also available.

The 1100-LFC cabinet is constructed of premium multi-ply
birch and coated with a slightly textured black finish. A
powder-coated, hex-stamped, steel grille with acoustical
black mesh protects the unit’s drivers. Other options include
weather protection and custom color finishes for fixed
installations and applications with specific cosmetic
requirements.

®

10

CHAPTER 2: POWER REQUIREMENTS

!

!

Neutral

Earth/Ground

Loudspeaker

(208 V AC)

Loudspeaker

(208 V AC)

Loudspeaker

(208 V AC)

Line 1 (120 V AC)

Line 3 (120 V AC)

Line 2 (120 V AC)

Neutral

Earth/Ground

Line 1 (230 V AC)

Line 3 (230 V AC)

Line 2 (230 V AC)

Loudspeaker

(230 V AC)

Loudspeaker

(230 V AC)

Loudspeaker

(230 V AC)

!

The 1100-LFC combines advanced loudspeaker technology
with equally advanced power capabilities. Understanding
power distribution, voltage and current requirements, and
electrical safety guidelines is critical to the safe operation of
the 1100-LFC.

AC POWER DISTRIBUTION

All components in an audio system (self-powered
loudspeakers, mixing consoles, and processors) must be
properly connected to an AC power distribution system,
ensuring that AC line polarity is preserved and that all
grounding points are connected to a single node or
common point using the same cable gauge (or larger) as the
neutral and line cables.

CAUTION: Make sure the voltage received by

the 1100-LFC remains within its 165–264 V AC
operating range. In addition, the ground line must
always be used for safety reasons and the
line-to-ground voltage should never exceed 250 V AC
(typically 120 V AC from line to ground).

CAUTION: Before applying AC power to any

Meyer Sound self-powered loudspeaker, make
sure that the voltage potential difference between the
neutral and earth-ground lines is less than 5 V AC
when using single-phase AC wiring.

1100-LFC OPERATING INSTRUCTIONS

Figure 4: 120 V AC, 3-Phase Wye System (Two Lines to Loudspeakers)

TIP: The 120 V AC, 3-phase Wye system with

two lines is recommended because it allows
loudspeakers to draw less current than with single­line systems, thereby reducing voltage drop due to
cable resistance. It also excludes the potential of
varying ground to neutral voltages producing an
audible hum.

230 V AC, 3-Phase Wye System (Single Line)

Line-Neutral-Earth/Ground

Figure 5 illustrates a basic 230 V AC, 3-phase Wye
distribution system with the loudspeaker load distributed
across all three phases, with each loudspeaker connected
to a single line and common neutral and earth/ground lines.
This system delivers 230 V AC to each loudspeaker.

NOTE: Improper grounding of connections

between loudspeakers and the rest of the
audio system may produce noise or hum, or cause
serious damage to the input and output stages of the
system’s electronic components.

120 V AC, 3-Phase Wye System (Two Lines)

Line-Line-Earth/Ground

Figure 4 illustrates a 120 V AC, 3-phase Wye distribution
system with each loudspeaker connected to two lines and a
common earth/ground line. This configuration is possible
because the 1100-LFC tolerates elevated voltages from the
ground line and does not require a neutral line. This system
delivers 208 V AC to each loudspeaker.

Figure 5: 230 V AC, 3-Phase Wye System (Single Line to Loudspeakers)

CAUTION: For 230 V AC, 3-phase Wye sys-

tems, never connect two lines to the AC input
of the 1100-LFC, as the resulting voltage would
exceed the upper voltage limit (275 V AC) and will
damage the loudspeaker.

AC INPUT

The 1100-LFC user panel includes an AC Input connector
that supplies power to the loudspeaker. The 3-conductor
PowerCON 32 (see Figure 6) is rated at 32 A and uses a
locking connector that prevents accidental disconnections.

11

CHAPTER 2: POWER REQUIREMENTS

Figure 6: PowerCON 32 AC Input Connector

The 1100-LFC ships with a black powerCON 32 cable
mount connector, rated at 32 A, for assembling AC power
cables. Make sure to use an AC power cable that is wired
correctly (see “Wiring AC Power Cables” on page 13) and
equipped with the appropriate power plug (on the other end)
for the area in which you will operate the unit.

The 1100-LFC requires a grounded outlet. To operate safely
and effectively, it is extremely important that the entire
system be properly grounded.

12

1100-LFC OPERATING INSTRUCTIONS

L

N

PE

SIDE FRONT REAR

U.S./Canada, 60 Hz

Black (L)

Europe, 50 Hz

Green (E)

White (N)

Brown (L)

Blue (N)

Green/
yellow (E)

!

!

!

WIRING AC POWER CABLES

The 1100-LFC ships with a black powerCON 32 cable
mount connector (Figure 7), rated at 32 A, for assembling
AC power cables. The pins on the powerCON 32 cable
mount connector are labeled as follows:

• L (Line)

• N (Neutral)

• PE (Protective Earth or Ground)

Figure 7: PowerCON 32 Cable Mount Connector

How AC power cables are wired is determined by the type
of AC power distribution system used (“AC Power
Distribution” on page 11). When wiring AC power cables for
single-line systems, use one of the wiring schemes
described in Table 1 and illustrated in Figure 8:

Table 1: AC Wiring Scheme

Wire Color Attach to the

U.S. / Canada

60 Hz

Black Brown Hot or live (L)

White Blue Neutral (N)

Green Green and Yellow Protective earth /

European

50 Hz

Following

Te rm i na l

ground (E or PE)

Supported PowerCON 32 Cable Gauges

While the powerCON 32 connector supports cable gauges
of 14–10 AWG (2.5–6.0 mm
current draw, 10 AWG (6.0 mm
possible.

2

), because of the 1100-LFC’s

2

) should be used whenever

1100-LFC VOLTAGE REQUIREMENTS

CAUTION: Due to its expanded power capabil-

ities, the 1100-LFC was engineered to operate
only at 230 V AC (208–235 V AC) to reduce current
draw. Make sure to use AC power cables with suffi­cient gauge to operate with stable voltages during
peaks and that the AC power source is capable of
providing enough power.

The 1100-LFC operates as intended when receiving AC
voltage within the following range:

• 165–264 V AC, 50–60 Hz

If the voltage drops below 165 V, the loudspeaker uses
stored power to continue operating temporarily; the
loudspeaker powers off if the voltage does not return to its
operating range.

If the voltage rises above 275 V, the power supply could
become damaged.

CAUTION: To ensure that the 1100-LFC per-

forms as specified, without interruption, and
without damage to its power supply:

1. Its power source must operate within the required

voltage window (208–235 V AC).

2. Its AC cable length and gauge must be such that

peak voltage drops do not exceed 5 percent of the
supplied voltage.

Figure 8: AC Wiring Scheme, illustrated

CAUTION: When wiring AC power cables and

distribution systems, it is important to preserve
AC line polarity and connect the earth ground on both
ends of the cable. The 1100-LFC requires a grounded
connection. Always use a grounded outlet and plug.
It is extremely important that the system be properly
grounded to operate safely and properly. Do not
ground-lift the AC cable.

NOTE: When voltage fluctuates within the

loudspeaker’s operating ranges, automatic tap
selection stabilizes the voltage. Tap selection is
instantaneous with no audible artifacts, allowing con­tinuous operation.

1100-LFC CURRENT REQUIREMENTS

Current draw for loudspeakers is dynamic and fluctuates as
operating levels change. Because different cables and
circuit breakers heat up at varying rates, it is important to

13

CHAPTER 2: POWER REQUIREMENTS

!

!

understand the following types of current ratings and how
they affect circuit breaker and cable specifications.

• Idle Current — The maximum rms current during idle

periods.

• Maximum Long-Term Continuous Current — The

maximum rms current during a period of at least
10 seconds. The maximum long-term continuous current
is used to calculate temperature increases for cables to
ensure that the size and gauge of the cables conform to
electrical code standards. The current rating is also used
to select appropriately rated, slow-reacting thermal
breakers, which are recommended for loudspeaker
power distribution.

• Burst Current — The maximum rms current during a

period of around 1 second. The burst current is used as
a rating for magnetic breakers. It is also used for calcu­lating the peak voltage drop in long AC cable runs
according to the following formula:

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

• Maximum Instantaneous Peak Current — A rating for

fast-reacting magnetic breakers.

• Inrush Current — The spike of initial current encoun-

tered when powering on.

Use the information provided in Table 2 as a guide for
selecting the gauge of cables and the circuit breaker ratings
for the system’s operating voltage.

Table 2: 1100-LFC Current Draw

Current Draw 230 V AC

Idle 0.6 A rms
Maximum Long-

Term Continuous
Burst 18 A rms
Maximum Instanta-

neous Peak
Inrush <30 A peak

10.5 A rms

53 A peak

The minimum electrical service amperage required by a
loudspeaker system is the sum of the maximum long-term
continuous current for all loudspeakers. An additional
30 percent above the combined Maximum Long-Term
Continuous amperages is recommended to prevent peak
voltage drops at the service entry.

NOTE: For best performance, the AC cable volt-

age drop should not exceed 10 V (5 percent at
230 V). This ensures that the AC voltage variations
from the service entry—or peak voltage drops due to
longer cable runs—do not cause the amplifier to cycle
on and off.

DO NOT RESET CIRCUIT BREAKERS!

CAUTION: In the unlikely event that one of the

1100-LFC’s circuit breakers trips (the center
button disengages), disconnect the AC power cable
and contact Meyer Sound for repair information. DO
NOT attempt to reset the breaker or reconnect the
AC power cable.

INTELLIGENT AC POWER SUPPLY

The 1100-LFC’s Intelligent AC™ power supply eliminates
high inrush currents with soft-start power up, suppresses
high-voltage transients up to several kilovolts, filters
common mode and differential mode radio frequencies
(EMI), and sustains operation temporarily during low-voltage
periods.

Powering on the 1100-LFC

When powering on the 1100-LFC, the following startup
events take place over several seconds.

1. Audio output is muted.

2. The primary fan turns on.

3. The power supply ramps up.

4. On the user panel, the Active LED turns solid green,

indicating the loudspeaker is unmuted and ready to
output audio.

CAUTION: If the Active LED does not turn solid

green, or the 1100-LFC does not output audio
after 10 seconds, remove AC power immediately and
verify that the voltage is within the required range. If
the problem persists, contact Meyer Sound Technical
Support.

ELECTRICAL SAFETY GUIDELINES

Make sure to observe the following important electrical and
safety guidelines.

• The powerCON 32 connector should not be engaged or
disengaged when under load or energized. Either de­energize or disconnect the other end of the cable.

• The 1100-LFC requires a grounded outlet. Always use a
grounded outlet and plug.

• Do not use a ground-lifting adapter or cut the AC cable
ground pin.

14

• Make sure the AC power cable for the loudspeaker has the
appropriate power plug (on the other end) for the area in
which you will operate the loudspeaker.

• Do not operate the loudspeaker if the power cable is
frayed or broken.

• Keep all liquids away from 1100-LFC loudspeakers to
avoid hazards from electrical shock.

• Use the cable rings (see “Cable Rings” on page 18) on
the rear of the the 1100-LFC cabinet to reduce strain on
the AC power cable (and audio cables). Do not use the
cable rings for any other purpose.

1100-LFC OPERATING INSTRUCTIONS

15

CHAPTER 2: POWER REQUIREMENTS

16

CHAPTER 3: AMPLIFICATION AND AUDIO

1100-LFC OPERATING INSTRUCTIONS

The 1100-LFC’s drivers are powered by a proprietary two­channel amplifier with bridged MOSFET output stages. The
audio signal is processed with correction filters for flat phase
and frequency responses and by driver protection circuitry.
Each channel has peak and rms limiters that prevent driver
over-excursion and regulate voice coil temperatures.

The 1100-LFC user panel (Figure 9) includes Input and Loop
output connectors for audio, Limit and Active LEDs, and RMS
connectors and controls (see Chapter 5, “RMS Remote
Monitoring System”).

AUDIO CONNECTORS

The 1100-LFC is available with XLR 3-pin or 5-pin
connectors for audio Input and audio Loop output (Figure 10
and Figure 11). XLR 5-pin connectors accommodate both
balanced audio and RMS signals.

Figure 10: XLR 5-Pin Audio Connectors, Input and Loop Output

Figure 9: 1100-LFC User Panel

Figure 11: XLR 3-Pin Audio Connectors, Input and Loop Output

Audio Input (XLR 3-Pin or 5-Pin Female)

The XLR 3-pin or 5-pin female Input connector accepts
balanced audio signals with an input impedance of
10 kOhm. The connector uses the following wiring scheme:

• Pin 1 — 1 kOhm to chassis and earth ground (ESD

clamped)

• Pin 2 — Signal (+)

• Pin 3 — Signal (–)

• Pin 4 — RMS (polarity insensitive)

• Pin 5 — RMS (polarity insensitive)

• Case — Earth (AC) ground and chassis

NOTE: Pins 4 and 5 (RMS) are included only

with XLR 5-pin connectors.

17

CHAPTER 3: AMPLIFICATION AND AUDIO

!

!

Pins 2 and 3 carry the input as a differential signal. Pin 1 is
connected to earth through a 1 kOhm, 1000 pF, 15 V
clamped network. This circuitry provides virtual ground lift
for audio frequencies while allowing unwanted signals to
bleed to ground. Make sure to use balanced XLR audio
cables with pins 1–3 connected on both ends. Telescopic
grounding is not recommended and shorting an input
connector pin to the case may cause a ground loop,
resulting in hum.

TIP: If unwanted noise or hiss is produced by the

loudspeaker, disconnect its input cable. If the
noise stops, there is most likely nothing wrong with the
loudspeaker. To locate the source of the noise, check
the audio cable, source audio, AC power, and electri­cal ground.

Audio Loop Output (XLR 3-Pin or 5-Pin Male)

The XLR 3-pin or 5-pin male Loop output connector allows
multiple loudspeakers to be looped from a single audio
source. The Loop output connector uses the same wiring
scheme as the Input connector (see “Audio Input (XLR 3-Pin
or 5-Pin Female)” on page 17). For applications that require
multiple 1100-LFCs, connect the Loop output of the first
loudspeaker to the Input of the second loudspeaker, and so
forth.

NOTE: Most source devices are capable of

driving loads no less than 10 times their output

impedance.

TIP: Audio outputs from Meyer Sound’s

Galileo GALAXY Network Platform have an out­put impedance of 50 ohms. Each output can drive up
to 20 Meyer Sound (10 kOhm) loudspeakers without
distortion.

CAUTION: Make sure that all cabling for

looped loudspeakers is wired correctly (Pin 1
to Pin 1, Pin 2 to Pin 2, and so forth) to prevent the
polarity from being reversed. If one or more loud­speakers in a system have reversed polarity, fre­quency response and coverage will be significantly
degraded.

CABLE RINGS

Two cable rings are provided on the rear of the 1100-LFC
cabinet (Figure 12). Power and audio cables should be tied
off to the rings to reduce strain on the cables and prevent
damage to them during installation. The cable rings should
not be used for any other purpose.

NOTE: The Loop output connector is wired in

parallel to the Input connector and transmits
the unbuffered source signal even when the loud­speaker is powered off.

Calculating Load Impedance for Looped Audio Signals

To avoid distortion when looping multiple loudspeakers,
make sure the source device can drive the total load
impedance of the looped loudspeakers. In addition, the
source device must be capable of delivering approximately
20 dBV (10 V rms into 600 ohms) to yield the maximum SPL
over the operating bandwidth of the loudspeakers.

To calculate the load impedance for the looped
loudspeakers, divide 10 kOhms (the input impedance for a
single loudspeaker) by the number of looped loudspeakers.
For example, the load impedance for ten 1100-LFCs is
1000 ohms (10 kOhms / 10). To drive this number of looped
loudspeakers, the source device should have an output
impedance of 100 ohms or less. This same rule applies when
looping 1100-LFCs with other Meyer Sound self-powered
loudspeakers.

Figure 12: Cables Tied Off to Cable Ring

CAUTION: The 1100-LFC cable rings should

only be used to reduce strain on cables. The

cable rings should not be used for any other purpose.

TRUPOWER LIMITING

The 1100-LFC employs Meyer Sound’s advanced

®

TruPower
driver impedance and set the limiting threshold by
measuring voltage alone. This method is inaccurate
because driver impedances change as frequency content in

limiting. Conventional limiters assume a constant

18

1100-LFC OPERATING INSTRUCTIONS

!

!

!

the source material changes and as thermal values for the
driver’s voice coil and magnet vary. Consequently,
conventional limiters often begin limiting prematurely, which
reduces system headroom and dynamic range.

In contrast, TruPower limiting anticipates varying driver
impedances by measuring both current and voltage to
compute the actual power dissipation in the voice coil. This
approach improves performance, both before and during
limiting, by allowing the driver to produce the maximum SPL
across its entire frequency range, while also retaining signal
peaks. TruPower limiting also eliminates power
compression at high levels over lengthy periods, which
helps regulate voice coil temperatures, thereby extending
the life of the driver.

LF Limit LED

The two low-frequency drivers for the 1100-LFC are
powered by separate amplifier channels that are routed to a
single limiter. When a safe power level is exceeded in either
channel, limiting is engaged for both channels and the LF
Limit LED lights (Figure 13) on the user panel.

CAUTION: The Limit LEDs indicate when a

safe, optimum level is exceeded. If an
1100-LFC loudspeaker system begins to limit before
reaching the desired SPL, consider adding more
loudspeakers to the system.

NOTE: The 1100-LFC uses an optical limiter

that adds no noise and has no effect on the
signal when limiting is not engaged.

AMPLIFIER COOLING SYSTEM

The 1100-LFC employs forced-air cooling with six ultra
high-speed fans (three primary, and three reserve) to
prevent the amplifier and power transformer from
overheating (see Table 3 for details). The fans draw air in
through ducts on the rear of the cabinet, over the heat sinks,
and out the rear of the cabinet. Because dust does not
accumulate in the amplifier and power circuitry, their
lifespans are increased significantly.

CAUTION: To keep the 1100-LFC from over-

heating, allow at least 6 inches behind the cab­inet for proper ventilation.

Figure 13: 1100-LFC Limit LEDs

When engaged, the limiter not only protects the drivers but
also prevents signal peaks from causing excessive
distortion in the amplifier channels, thereby preserving
headroom and maintaining smooth frequency response at
high levels. When levels return to normal, below the limiter
threshold, limiting ceases.

The 1100-LFC performs within its acoustical specifications
at normal temperatures when the LF Limit LED is unlit, or
when the LED is lit for 2 seconds or less and then turns off
for at least 1 second. If the LED remains lit for longer than
3 seconds, the loudspeaker enters hard limiting where:

• Increases to the input level have no effect

• Distortion increases due to clipping

• Drivers are subjected to excessive heat and excursion,
thereby compromising their lifespan

Table 3: 1100-LFC Fans

Primary Fans Reserve Fans

Type Ultrahigh-speed Ultrahigh-speed

Number 3 3

Location 1 for each heat sink (2);

1for power transformer

Fan speeds
and heat
sink temp.

<34 °C Half speed <52 °C Off

34–50 °C Ramps up >52 °C Full speed

50–84 °C Full speed

>95 °C Audio

muted, fans

continue at

full speed

<86 °C Audio

unmuted,
fans con-

tinue at full

speed

1 for each heat sink (2);
1for power transformer

>95 °C Audio

muted, fans

continue at

full speed

<86 °C Audio

unmuted,
fans con-

tinue at full

speed

CAUTION: If an 1100-LFC loudspeaker system

consistently overheats before reaching the
desired SPL, consider adding more loudspeakers to
the system.

19

CHAPTER 3: AMPLIFICATION AND AUDIO

NOTE: In the unlikely event that the 1100-LFC

power transformer reaches a temperature of
127 °C, the limiter threshold is reduced by 3 dB.
When the temperature cools to 107 °C, the limiter
threshold returns to normal.

TIP: When the 1100-LFC is connected to an RMS

network, the Compass RMS software provides
additional feedback on the loudspeaker’s hardware
status and operating temperature. For more informa­tion, see Chapter 5, “RMS Remote Monitoring Sys­tem.”

20

1100-LFC OPERATING INSTRUCTIONS

CHAPTER 4: QUICKFLY RIGGING

IMPORTANT SAFETY CONSIDERATIONS!

When installing Meyer Sound loudspeakers and subwoofers, the following precautions should always be observed:

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

• Use mounting and rigging hardware that has been rated
to meet or exceed the weight being hung.

• Make sure to attach mounting hardware to the building’s
structural components (roof truss), and not just to the
wall surface.

• Make sure bolts and eyebolts are tightened securely.
Meyer Sound recommends using Loctite

®

on all

threaded fasteners.

• Inspect mounting and rigging hardware regularly. Imme­diately replace any worn or damaged components.

1100-LFC RIGGING OPTIONS

Table 4 summarizes the available rigging options for the 1100-LFC. For complete information about rigging hardware,
including dimensions, weight, configuration, and load ratings, refer to the MTG-1100 Assembly Guide (PN 05.220.030.01)
available at www.meyersound.com

Table 4: 1100-LFC Rigging Options

Model Weight Features Required Quick-Release Pins Required

MRK-1100 rigging kit

(PN 40.220.027.01)

MTG-1100 top grid
(PN 40.220.030.01)

MVP motor Vee plate
(PN 40.215.184.01)

MAS-1100 array
spacer
(PN 40.220.080.01)

MCF-1100
caster frame
(PN 40.220.039.01)

— Allows the 1100-LFC to be flown from the MTG-1100

195 lbs

(88.5 kg)

20 lb

(9.1 kg)

82 lbs

(37.2 kg)

138 lbs

(62.6 kg)

.

grid; includes four captive
GuideALinks and eight quick-release pins

With some restrictions, flies up to 16 1100-LFCs at a 5:1
safety factor, or up to 12 1100-LFCs at a 7:1 safety factor;
accommodates a variety of pickup configurations with six
pickup points; includes attachment points to
accommodate brackets and adapters for lasers and
inclinometers

Fine tunes the horizontal aim of arrays; compatible with
MTG-LEO-M, MTG-LYON, MTG-1100, and
MG-LEOPARD/900 grids

Placed between cabinets in 1100-LFC arrays to lengthen
the array and improve vertical directionality; includes four
captive GuideALinks and eight quick-release pins

Safely transports up to three 1100-LFC cabinets, making
it easy to assemble and disassemble arrays in blocks of
three cabinets

0.5 x 1.25-inch (blue button),
PN 134.044, qty 8 included

0.5 x 1.50-inch (red button),
PN 134.045, qty 4 included

— 3/4-inch or

0.5 x 1.25-inch (blue button),
quantity 8, PN 134.044

0.5 x 1.25-inch (blue button),

PN 134.044, qty 0 included

Shackles

—

7/8-inch

7/8-inch

—

—

NOTE: The MCF-1100 caster frame does not include quick-release pins because it is secured with the quick-

release pins included with the loudspeaker.

21

CHAPTER 4: QUICKFLY RIGGING

!

GROUNDSTACKING 1100-LFC LOUDSPEAKERS

1100-LFCs can be groundstacked up to four cabinets high,
with or without the MRK-1100 rigging kit (Figure 14).
Protective plastic skids are included on the bottom of the
1100-LFC cabinet that align with the slots on the cabinet top.
Loudspeakers can be stacked normally or reversed for
cardioid configurations. When groundstacking 1100-LFCs,
make sure the skids for each cabinet align with the slots in the
cabinet tops.

yields output that cancels the output of the front-facing
loudspeakers behind the array. Example: for the rear-facing
loudspeaker, reverse the polarity relative to the front-facing
loudspeakers and add 5.2 ms of delay relative to the front­facing loudspeakers.

Figure 14: 1100-LFC Groundstack (Without Rigging)

CAUTION: As a safety precaution, to avoid

tipping, a maximum of four cabinets is

supported for groundstacked 1100-LFCs.

NOTE: 1100-LFCs need not be equipped with

the MRK-1100 rigging kit for secure ground-

stacking of up to four cabinets.

1100-LFC CARDIOID ARRAYS

The 1100-LFC can be configured in cardioid arrays to reduce
output heard behind the loudspeakers (Figure 15). The
loudspeaker’s linearity ensures that cardioid patterns behave
accurately even at very high levels. Cardioid arrays are
achieved by placing three loudspeakers coplanar to each
other (in either a groundstacked or flown array) with one
loudspeaker facing the opposite direction. Polarity and delay
processing is applied to the rear-facing loudspeaker, which

Figure 15: 1100-LFC Cardioid Groundstack (With Rigging)

NOTE: 1100-LFCs need not be equipped with

the MRK-1100 rigging kit for groundstacked

cardioid configurations of up to three cabinets.

NOTE: 1100-LFC cardioid arrays can also be

flown from the MTG-1100 grid. For more infor­mation, refer to the MTG-1100 Assembly Guide
(PN 05.220.030.01) available at www.meyer-

sound.com.

NOTE: To achieve an accurate cardioid pattern,

Meyer Sound’s MAPP prediction software and
the Galileo

®

GALAXY Network Platform are required.
Use MAPP to calculate the appropriate ratio of forward
to rear-facing loudspeakers. A myriad of cardioid and
directional configurations are possible and can be cal­culated and predicted with MAPP. For more informa­tion, contact Meyer Sound Technical Support.

MRK-1100 RIGGING KIT

The optional MRK-1100 allows the 1100-LFC to be flown from
the MTG-1100 top grid. The rigging kit is available as a
factory-installed option or as a field upgrade and uses rugged
GuideALinks and intuitive quick-release pins to securely link

22

adjacent loudspeakers in flown and groundstacked array
configurations.

NOTE: For more information about the

MRK-1100 rigging kit, including its kit con­tents, weight, and installation instructions, refer to the
MTG-1100 Assembly Guide (PN 05.220.030.01)
available at www.meyersound.com

.

1100-LFC GUIDEALINKS

When equipped with the MRK-1100 rigging kit, the 1100-LFC
includes four captive GuideALinks and four mating link slots
that link to adjacent loudspeakers in flown and
groundstacked arrays. Located at the top corners of the
cabinet, GuideALinks extend up and into the link slots of the
cabinet above it (Figure 16 and Figure 17), or into the link
slots of the MTG-1100 grid, making it easy to link cabinets
when they are stacked. GuideALinks extend and retract with
knobs and are secured with two quick-release pins: one each
in the top and bottom cabinets. GuideALinks accommodate
reversed loudspeakers for cardioid arrays. The MRK-1100
rigging kit includes eight 0.5 x 1.25-inch quick-release pins
(blue button) (PN 134.044).

1100-LFC OPERATING INSTRUCTIONS

Figure 17: 1100-LFCs with MRK-1100 Rigging Kit, GuideALinks
Exposed

Figure 16: 1100-LFCs with MRK-1100 Rigging Kit, GuideALinks,
Exploded View

NOTE: refer to the MTG-1100 Assembly Guide

(PN 05.220.030.01) available at

www.meyersound.com

.

23

CHAPTER 4: QUICKFLY RIGGING

MAS-1100 ARRAY SPACER

THE MAS-1100 array spacer improves subwoofer array performance by adding significant line length with minimal weight gain,
cost or sidelobes. Myer Sound sized the MAS-1100 to provide the maximum increase in line length without compromising
structural integrity or acoustical performance. For more details, see both the MAS-1100 Array Spacer Application Note
(PN 18.220.087.01) and the MTG-1100 Assembly Guide (PN 05.220.030.01) available at

https://meyersound.com/product/1100-lfc/

Figure 18: Two 1100-LFC with MAS-1100 Array Spacer

24

CHAPTER 5: RMS REMOTE MONITORING SYSTEM

The 1100-LFC includes an RMS remote monitoring system
module, allowing the loudspeaker to be connected to an
RMS network. RMS reports, in real time, the status and
power usage of multiple Meyer Sound loudspeakers from a
Mac or Windows-based computer. The RMS host computer
communicates with Meyer Sound loudspeakers (equipped
with RMS modules) via RMServer
based hardware unit with two FT-10 RMS dataports.
RMServer stores system configurations internally, eliminat­ing most manual data entry. Systems can be monitored from
a computer at front-of-house or backstage, or from a laptop
anywhere within the venue over WiFi.

NOTE: For the latest RMS system require-

ments, visit the Meyer Sound website
(http://www.meyersound.com

NOTE: The 1100-LFC includes an internal

Mute Jumper that enables RMS mute and solo
capability. The loudspeaker currently ships with the
Mute Jumper installed. Compass RMS also allows
you to disable Mute and Solo functions to eliminate
any possibility of accidentally muting loudspeakers.

NOTE: RMS does not control AC power.

™

, a compact, Ethernet-

).

Figure 19: Compass RMS Window

Individual loudspeakers can be physically identified with the
Wink option in RMS, which lights the Wink LED on the RMS
module of that particular loudspeaker. Conversely, a loud­speaker can be identified in Compass RMS by pressing the
Identify button on the loudspeaker’s RMS module.

Loudspeaker icons can be arranged in Compass RMS and
saved as pages to represent how the loudspeakers have
been deployed in the system. Multiple pages can be saved
and recalled for specific performances and venues.

1100-LFC OPERATING INSTRUCTIONS

COMPASS RMS SOFTWARE

Compass RMS™ software provides extensive system status
and performance data for each loudspeaker, including
amplifier voltage, limiting activity, power output, fan and
driver status, as well as mute and solo capability. Loud­speakers are added to the RMS network and assigned a
node name during a one-time discovery procedure. After
loudspeakers are identified on the RMS network, they
appear in Compass RMS as icons that can be customized
to suit your needs (Figure 19).

RMS MODULE

The 1100-LFC RMS user panel includes an Identify button,
Wink/Activity LED, and two Network connectors (Figure 20).

Figure 20: 1100-LFC RMS Module

NOTE: The Identify button and Wink/Activity

LED on the RMS user panel are used exclu­sively by RMS and have no effect on the acoustical or
electrical activity of the loudspeaker.

25

CHAPTER 5: RMS REMOTE MONITORING SYSTEM

Identify Button

The Identify button serves the following functions:

• If the loudspeaker has not yet been discovered on the
RMS network (Wink/Activity LED not lit), press the Iden­tify button to discover it.

• To remove the loudspeaker from the RMS network,
press and hold the Identify button during startup (see
“Resetting the RMS Module” on page 26).

•To wink a discovered loudspeaker, press the Identify
button. The Wink LED on the loudspeaker icon in Com­pass RMS lights up and the Wink/Activity LED on the
loudspeaker’s RMS user panel turns solid green. Press
the Identify button again to unwink the loudspeaker.

TIP: The loudspeaker can also be winked by

clicking the Wink button on the loudspeaker

icon in Compass RMS.

Wink/Activity LED (Green)

The green Wink/Activity LED indicates the status of the
loudspeaker:

• During startup, the LED flashes green 10 times.

NEURON ID FOR RMS MODULE

Each RMS module has a unique 12-character Neuron ID
(NID) that identifies the loudspeaker on the network. The
NID is automatically detected by RMServer but can also be
entered manually, if necessary, when configuring RMS sys­tems in Compass RMS without loudspeakers present. The
NID label is located on the RMS user panel near the orange
Network connectors.

RESETTING THE RMS MODULE

Use the Identify button to reset the 1100-LFC RMS module
when powering on the loudspeaker. This action will cause
the module to be removed from the RMS network.

To reset the RMS module:

1. Power down the loudspeaker.

2. Press and hold the Identify button.

3. While continuing to hold down the Identify button, power
on the loudspeaker.

4. After the Wink/Status LED flashes on and off, release the
Identify button. The RMS module is reset and the loud­speaker is removed from the RMS network.

• If the loudspeaker has not yet been discovered on the
RMS network, the LED is not lit after startup.

• If the loudspeaker has been successfully discovered on
the RMS network, the LED flashes green continuously
and flashes more rapidly with increased data activity.

• When the loudspeaker is winked, either by clicking the
Wink button in Compass RMS or by pressing the Identify
button on the RMS user panel, the LED is solid green.
The LED remains solid green until the loudspeaker is
unwinked.

TIP: The Wink function is useful for identifying

the physical loudspeaker corresponding to a

loudspeaker icon in Compass RMS.

RMS Network Connectors

The Weidmuller 2-conductor, locking connectors transfer
data to and from the RMS network. Two connectors are pro­vided to allow for easy connection of multiple (daisy­chained) loudspeakers on the network. Included with each
RMS-equipped loudspeaker are RMS cable connectors and
mounting blocks for constructing RMS cables. The RMS
blocks allow Weidmuller connectors to be securely attached
to the RMS module with screws.

26

CHAPTER 6: SYSTEM DESIGN AND INTEGRATION TOOLS

1100-LFC OPERATING INSTRUCTIONS

This chapter introduces MAPP, Meyer Sound’s patented
system design tool, and SIM, a comprehensive system for
measurement and analysis.

MAPP SYSTEM DESIGN TOOL

The MAPP System Design Tool (Figure 21) is a powerful,
cross-platform application for accurately predicting the
coverage pattern, frequency response, phase response,
impulse response, and SPL capability of single or arrayed
Meyer Sound loudspeakers.

Figure 21: MAPP System Design Tool

Whether planning for fixed installations or for tours with
multiple venues, use MAPP to accurately predict the
appropriate loudspeaker deployment for each job, complete
with coverage data, system delay and equalization settings,
rigging information, and detailed design illustrations. MAPP’s
accurate, high-resolution predictions ensure that systems
will perform as expected, thereby eliminating unexpected
coverage problems and minimizing onsite adjustments.

The key to the accuracy of MAPP’s predictions is Meyer
Sound’s exhaustive database of loudspeaker
measurements. Performance predictions for each
loudspeaker are based on 720 1/48th-octave-band
measurements taken with a SIM audio analyzer in the Meyer
Sound anechoic chamber. The extraordinary consistency
between Meyer Sound loudspeakers guarantees that
predictions from MAPP will closely match their actual
performance.

MAPP client software lets you configure Meyer Sound
loudspeaker systems and define the environment in which
they operate, including air temperature, pressure, humidity,
and even the location and composition of surfaces. You can
also import CAD (.DXF) files containing detailed venue
information to act as a visual aid.

MAPP prediction requests are sent by the client software to
Meyer Sound servers, where complex, high-resolution
(magnitude and phase) polar data is processed with
sophisticated acoustical prediction algorithms. The resulting
predictions are then displayed in the MAPP client software.

TIP: Meyer Sound offers seminars and webinars

on using MAPP. For more information, visit

www.meyersound.com

.

MAPP Capabilities

With MAPP, you can:

• Simulate different loudspeaker configurations to refine
system designs and determine the best coverage for
intended audience areas

• Model loudspeaker interactions to locate constructive
and destructive interferences so that loudspeakers can
be re-aimed and repositioned as necessary

• Place microphones anywhere in the sound field and
predict loudspeaker frequency response, phase
response, and sound pressure levels at each microphone
position

• Determine delay settings for fill loudspeakers using the
Inverse Fast Fourier Transform feature

• Preview the results of signal processing to determine
optimum settings for the best system response

• Automatically calculate load information for arrays to
determine necessary minimum rigging capacity, front-to­back weight distribution, and center of gravity location

• Generate and export system images and full-system PDF
reports for client presentations

27

CHAPTER 6: SYSTEM DESIGN AND INTEGRATION TOOLS

SIM MEASUREMENT SYSTEM

The SIM audio analyzer is a high-resolution audio
measurement system comprising software, hardware,
microphones, and accessory cables. SIM presents measured
audio frequencies at a resolution of 48 points per octave,
where the 48 points per octave are arranged in even
frequency increments in each octave group, equal to the total
frequencies in that octave divided by 48. This resolution
allows application of precise corrections to balance system
response using frequency and phase domain information.

Source Independent Measurement Technique

The SIM audio analyzer implements Meyer Sound’s source
independent measurement technique. This dual-channel
method makes analysis of statistically unpredictable
excitation signals possible. Any excitation signal, within the
desired frequency range, can be used to obtain highly
accurate measurements for acoustical or electronic systems.

For example, during a performance, both the input signal and
the measured output of the loudspeaker system can be
analyzed by SIM and the results can be used to:

• View measurement data as amplitude versus time
(impulse response) or amplitude and phase versus
frequency (frequency response)

SIM Applications

SIM’s main applications are testing and aligning loudspeaker
systems, which entails:

• Measuring propagation delays between subsystems to
determine appropriate delay times

• Verifying correct polarity

• Measuring and comparing phase responses of
subsystems

• Measuring variations in frequency response caused by the
acoustical environment and the placement and interaction
of loudspeakers to determine corrective equalization

• Optimizing subwoofer integrations

• Optimizing loudspeaker arrays

SIM can also be used in the following applications:

• Microphone calibration and equalization

• Transducer evaluation and correction

• Echo detection and analysis

• Vibration analysis

• Architectural acoustics

• View single-channel frequency domain data with a
logarithmic frequency axis

• Determine and internally compensate for propagation
delays using the SIM Delay Finder

28

APPENDIX A: MEYER SOUND WEATHER PROTECTION

!

1100-LFC OPERATING INSTRUCTIONS

The Weather Protection option from Meyer Sound is
intended to increase the useful life of Meyer Sound
loudspeakers when they are installed outdoors and exposed
to different and often harsh weather conditions. Our
Weather Protection includes a penetrating treatment to raw
wood, use of special primers, and plating on all steel parts
used (or alternatively, the use of stainless steel hardware).
Weather Protection is designed to prevent malfunctions
caused by harsh operating environments and slows the
accelerated wear and tear that occurs in outdoor
environments.

When Is Weather Protection Advisable?

Weather Protection is strongly recommended for all
permanent outdoor installations where loudspeakers are
directly exposed to the elements. This includes desert and
semi-arid climates, where protection against dust and sand
is important, and where infrequent rainstorms can
contribute to deterioration of loudspeaker components.

Weather Protection is also recommended when the
loudspeakers are sheltered from direct exposure to
precipitation but are nevertheless exposed to prolonged
high humidity, fog or mist. Examples would be installations
on covered outdoor terraces or pavilions.

Weather Protection is further advisable for portable or
touring systems when any significant outdoor use is
anticipated. Even though standard procedures may call for
using external protective measures, these are often not
implemented in time to prevent moisture intrusions that
could lead to premature performance degradation of the
loudspeaker.

air environments, the exterior grille can quickly show signs
of oxidation, causing unsightly discoloration.

Apart from selecting suitable weather protection, the
progress of wear and tear on the loudspeaker can be
slowed by a regular schedule of inspection and cleaning.
This maintenance is particularly necessary in harsh
environments. Inspection and cleaning should include
routine removal of any visible oxidation or environmental
particulates, as these can accelerate metal corrosion or
decay of the cabinet. If installed loudspeakers are not in use
for an extended period, exterior protection or temporary
removal and storage of the loudspeakers should be
considered.

Benefits of Weather Protection

There are several benefits to selecting the Meyer Sound
Weather Protection option:

Functionality - Weather Protection prolongs the service life
of the loudspeaker by preventing premature degradation of
internal components.

Safety - Weather Protection lessens the chance of electrical
malfunctions or structural failures.

WARNING: IT IS THE RESPONSIBILITY OF

PURCHASERS/USERS/OPERATORS TO
SELECT WEATHER PROTECTION WHEN APPRO­PRIATE FOR THEIR USE AND TO PERIODICALLY
INSPECT THEIR LOUDSPEAKER INSTALLATIONS
FOR ANY DETERIORATION THAT MAY LEAD TO
SAFETY CONCERNS.

Aesthetics - Weather Protection slows wear and tear on the

Climate Variation and Owner Maintenance

The wear and tear on a loudspeaker will vary significantly
with different climatic conditions. For example, a weather­protected loudspeaker installed in a sunlight-exposed
location on an ocean pier will experience much harsher
conditions than a loudspeaker in a similar installation that is
shaded by trees and exposed only to rainfall. The constant
exposure to direct UV radiation and salt air environment will
cause a loudspeaker to wear more quickly than one with
partial UV shielding and exposed only to freshwater
moisture.

Wear can eventually affect the performance of the
loudspeaker. It also affects aesthetics. For example, in salt

exterior of the loudspeaker in harsh conditions. Early signs
of wear and tear on the exterior of the loudspeaker indicate
over-exposure to the elements.

Standards Compliance - Weather Protection helps in
meeting IP ratings for loudspeakers. IP ratings are an
internationally recognized standard often used in
installations involving our products. A further explanation of
IP ratings is given in the “IP Ratings” Section on page 31.

29

APPENDIX A: MEYER SOUND WEATHER PROTECTION

WEATHER PROTECTION COMPONENTS

Standard Weather Protection

Meyer Sound designs toward an IP rating of IPX4 (see “IP
Ratings” on page 31) for Standard Weather Protection,
which includes the following components:

• Wood treatment—Prior to cabinet manufacturing, the
raw wood receives a special treatment that penetrates
and stabilizes the wood fibers to withstand a wide range
of temperatures and exposure to extreme humidity.

• Cabinet finishing—The assembled cabinets receive a
highly impervious finish that includes a sealing primer
and a finishing topcoat. The coatings are applied on both
surfaces, with one coat on the interior and two on the
exterior. The final step is a two-part modified acrylic
urethane similar to that used in military applications.

• Driver treatment—All cone drivers are coated with a
water-resistant sealant.

• Exterior protection—Grille frames are coated to resist
corrosion, and all components that mount to the cabinet
use custom gaskets and stainless steel fasteners.

If in doubt about an installation method, contact Meyer
Sound Technical Support for assistance.

Always discuss the environmental conditions of your Meyer
Sound installation with your Sales Manager, and verify the
availability of Weather Protection for your selected
loudspeaker models. The Sales Manager, together with
Technical Support, will verify the appropriate level of
weather protection for the loudspeakers and related rigging
hardware.

• Removable rain hood—The rain hood is designed to
shield connectors even in wind-driven rain.

INSTALLATION PRACTICES

Meyer Sound assumes normal and accepted installation
practices are used when installing Meyer Sound
Loudspeakers outdoors. Deviation from such practices may
cause weather protection to be ineffective and void the
warranty for the loudspeaker.

Examples of unacceptable and acceptable installation
practices include:

• Loudspeakers installed outdoors should not face
upward.

• Loudspeakers with a rain hood should be installed in
such a way that the rain hood opening is not facing any
direction but down.

• Meyer Sound-supplied rigging components should not
be modified (for example, by drilling additional holes in a
MUB for mounting to a wall). When an installer/integrator
modifies a Meyer Sound supplied rigging component to
support their installation method, it is considered
compromised and out of warranty.

• All loudspeaker cabling must be installed with a
"drip-loop" or equivalent method to ensure that rain/
water is NOT wicked toward the loudspeaker.

30

1100-LFC OPERATING INSTRUCTIONS

IP RATINGS

IP stands for "Ingress Protection." The current format for expressing an IP rating is a 2-digit code. The first digit of an IP
rating represents protection from solid objects. The second digit of an IP rating represents protection from water or
moisture. Table 5 provides a chart of IP ratings and the corresponding definitions of the rating.

NOTE: IP ratings only apply to the "ENCLOSURE." A loudspeaker is considered an enclosure and as such we

can apply an IP rating to it. Rigging hardware is not an enclosure and therefore IP ratings do not apply. Also,
cable and cable-mount connectors used to connect to the loudspeaker are NOT part of the enclosure and therefore
not part of the IP rating. Only the chassis-mounted part of the connector is considered part of the enclosure.

Table 5: 1100-LFC IP Ratings Definition Chart

First Digit
(Protection against solid
objects)

X Characteristic numeral is

0 No protection 0 No protection

1 Protected against solid

2 Protected against solid

3 Protected against solid

4 Protected against solid

5 Protected against dust.

Definition Second Digit

(Protection against
liquids)

X Characteristic numeral is

not required to be specified.

1 Protected against vertically

objects over 50mm.

2 Protected against direct

objects over 12 mm.

3 Protected against direct

objects over 2.5mm.

4 Protected against direct

objects over 1 mm.

5 Protected against

Limited ingress permitted.

Definition

not required to be specified.

falling drops of water.

sprays up to 15° from the
vertical.

sprays up to 60° from the
vertical

sprays from all directions.
Limited ingress permitted

low-pressure jets of water
from all directions. Limited
ingress permitted.

6 Totally protected against

dust.

6 Protected against strong

jets of water from all
directions. Limited ingress
permitted.

7 Protected against the effect

of temporary immersion
between 15cm and 1m.

8 Protected against the effect

of long-term submersion of
1m or more.

31

APPENDIX A: MEYER SOUND WEATHER PROTECTION

32

APPENDIX B: RAIN HOODS

OPEN TO FULLY OPERATE

OPEN TO FULLY OPERATE

6.25

[159 mm]

8.50

[216 mm]

9.27

[235 mm]

Rear view

(collapsed)

Top v i e w

(expanded)

Side view

(expanded)

The 1100-LFC is optionally available with weather protection for fixed, outdoor installations. Weather-protected units
include a collapsible rain hood that protects the loudspeaker’s connectors from water intrusion.

EXPANDING THE 1100-LFC COLLAPSIBLE RAIN HOOD

To expand the 1100-LFC collapsible rain hood:

1. Remove the rain hood’s Velcro straps.

2. Expand the rain hood’s fabric fully upward and outward.

3. Reach inside the rain hood and free the two struts (Figure 22) from the top corner pockets nearest the loudspeaker.

Figure 22: Rain Hood Struts

4. Fold the two struts downward and outward and insert them into the two side pockets to expand the rain hood
(Figure 23).

Figure 23: 1100-LFC with Rain Hood Expanded

NOTE: For 1100-LFC dimensions with the rain hood expanded, see “1100-LFC Dimensions with Rain Hood

Expanded” on page 38.

33

APPENDIX B: RAIN HOODS

34

1100-LFC OPERATING INSTRUCTIONS

APPENDIX C: SPECIFICATIONS

NOTE: Loudspeaker system predictions for coverage and SPL are available in Meyer Sound’s MAPP predic-

tion software.

1100-LFC Specifications

ACOUSTICAL

Operating Frequency Range 28 Hz – 100 Hz

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

Frequency Response 30 Hz – 85 Hz ±4 dB

Note: Measured in half-space with pink noise at 4 m, 1/3-octave frequency resolution.

Phase Response 34 Hz to 82 Hz ±30 degrees
Linear Peak SPL 140 dB with crest factor >9.5 dB (M-noise), 140 dB (Pink Noise), 141 dB (B-noise)

Note: Linear Peak SPL is measured in half-space at 4 m referred to 1 m. Loudspeaker
SPL compression measured with M-noise at the onset of limiting, 2-hour duration, and
50-degree C ambient temperature is <2 dB.
M-noise is a full bandwidth (10 Hz–22.5 kHz) test signal developed by Meyer Sound to
better measure the loudspeaker’s music performance. It has a constant instantaneous
peak level in octave bands, a crest factor that increases with frequency, and a full band­width Peak to RMS ratio of 18 dB. The presence of a greater-than (>) symbol with regard
to crest factor indicates it may be higher depending on EQ and boundary loading.

Pink noise is a full bandwidth test signal with Peak to RMS ratio of 12.5 dB.
B-noise is a Meyer Sound test signal used to ensure measurements reflect system

behavior when reproducing the most common input spectrum, and to verify there is still
headroom over pink noise.

COVERAGE

360° (single unit); Varies with number of units and configuration.

TRANSDUCERS

Low Frequency Two 18 in long-excursion cone drivers; 8 Ω nominal impedance

AUDIO INPUT

Type Differential, electronically balanced
Maximum Common Mode Range ±15 V DC, clamped to earth for voltage transient protection
Connectors XLR 5-pin female with male loop output; XLR 3-pin female connectors available to

accommodate only balanced audio (no RMS signals)
Input Impedance 10 kΩ differential between pins 2 and 3
Wiring Pin 1: Chassis/earth through 220 kΩ, 1000 pF, 15 V clamped network to provide virtual

ground lift at audio frequencies

Pin 2: Signal (+)

Pin 3: Signal (–)

Pin 4: RMS (polarity insensitive)

Pin 5: RMS (polarity insensitive)

Case: Earth ground and chassis

Note: Pins 4 and 5 (RMS) included only with XLR 5-pin connector that accommodates

both balanced audio and RMS signals.
Nominal Input Sensitivity 0.0 dBV (1.0 V rms) continuous is typically the onset of limiting for noise and music
Input Level Audio source must be capable of producing +20 dBV (10 V rms) into 600 Ω to produce

the maximum peak SPL over the operating bandwidth of the loudspeaker

35

APPENDIX C: SPECIFICATIONS

1100-LFC Specifications

AMPLIFIER

Type 2-channel, complementary MOSFET output stages (class AB/H bridged)
Total Output Power 8100 W peak

Note: Peak power based on the maximum unclipped voltage the amplifier will produce

into the nominal load impedance.
THD, IM, TIM < 0.02%
Cooling Three ultra high-speed primary fans, three ultra high-speed reserve fans

AC POWER

Connector powerCON 32 input
Voltage Selection Automatic with high-low voltage tap (uninterrupted)
Safety Agency Rated Voltage

Range
Turn-on/off Points Turn-on: 165 V AC; Turn-off: 264 V AC

CURRENT DRAW

Idle 0.6 A rms (230 V AC)
Maximum Long-Term Continuous

(>10 sec)
Burst (<1 sec) 18 A rms (230 V AC)

Maximum Instantaneous Peak 53 A peak (230 V AC)
Inrush < 30 A peak (230 V AC)

RMS NETWORK

PHYSICAL

Enclosure Premium multi-ply birch
Finish Slightly textured black
Protective Grille Powder-coated, hex-stamped steel with acoustical black mesh
Rigging Optional MRK-1100 rigging kit that has endframes with captive GuideALinks secured with

Dimensions 52.60 inches (1336 mm) W 20.48 inches (520 mm) H 33.00 inches (838 mm) D
Dimensions (w/Rigging) 54.65 inches (1388 mm) W 20.48 inches (520 mm) H 33.00 inches (838 mm) D
Weight 249 lb (112.9 kg)
Weight (w/Rigging) 285 lb (129.3 kg)

ENVIRONMENTAL

Operating Temperature 0 °C to +45 °C
Non Operating Temperature –40 °C to +75 °C
Humidity To 95% at 45 °C (non-condensing)
Operating Altitude To 5,000 m (16,404 ft)
Non Operating Altitude To 12,000 m (39,000 ft)
Shock 30 g 11 msec half-sine on each of 6 sides
Vibration 10 Hz – 55 Hz (0.010 m peak-to-peak excursion)

208-235 V AC, 50–60 Hz

10.5 A rms (230 V AC)

Note: AC power cabling must be of sufficient gauge so that under burst rms current con-

ditions, cable transmission losses do not cause the loudspeaker’s voltage to drop below

the specified operating range.

Equipped with two-conductor twisted-pair network, reporting all operating parameters of

amplifiers to system operator’s host computer.

0.5 in x 1.25 in quick release pins. Rigging supports ground-stacked, flown, and cardioid

configurations.

36

1100-LFC DIMENSIONS

52.60

[1336 mm]

33.00

[838 mm]

20.48

[520 mm]

36.00

[914 mm]

54.65

[1388 mm]

20.10

[511 mm]

16.65

[423 mm]

10.65

[270 mm]

1100-LFC OPERATING INSTRUCTIONS

1100-LFC Dimensions

NOTE: For the dimensions and weight for the MTG-1100 top grid, MAS-1100 array spacer, and MCF-1100

caster frame, refer to the MTG-1100 Assembly Guide (PN 05.220.030.01) available at www.meyersound.com

.

37

APPENDIX C: SPECIFICATIONS

52.60

[1336 mm]

33.00

[838 mm]

20.48

[520 mm]

36.00

[914 mm]

54.65

[1388 mm]

20.10

[511 mm]

16.65

[423 mm]

10.65

[270 mm]

8.50

[216 mm]

6.25

[159 mm]

41.27

[1048 mm]

1100-LFC Dimensions with Rain Hood Expanded

1100-LFC Dimensions with Rain Hood Expanded

38

1100-LFC OPERATING INSTRUCTIONS

FEDERAL COMMUNICATIONS COMMISSION (FCC) STATEMENT

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required
to correct the interference at their own expense.

This device complies with Part 15 of the FCC rules. 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.

INDUSTRY CANADA COMPLIANCE STATEMENT

This Class A digital apparatus complies with Canadian ICES-003.

AVIS DE CONFORMITÉ À LA RÉGLEMENTATION D'INDUSTRIE CANADA

Cet appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.

EN 55032 (CISPR 32) STATEMENT

Warning: This equipment is compliant with Class A of CISPR 32. In a residential environment this equipment may cause
radio interference.

39

Meyer Sound Laboratories Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
+1 510 486.1166
www.meyersound.com

© 2013, 2016, 2019

Meyer Sound. All rights reserved.

1100-LFC Operating Instructions

PN 05.220.005.01 B4