Crown M-120, M-240 Owners manual
Operation Manual
M Series
M120
1
1
M240
Obtaining Other Language Versions:
local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible
situation which may arise during installation, operation or maintenance.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have
occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.
Trademark Notice:
respective owners.
©2006 by Crown Audio® Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000
Crown and Amcron are registered trademarks of Crown International. Other trademarks are the property of their
To obtain information in another language about the use of this product, please contact your
Some models may be exported under the name Amcron.
®
126781-5A
3/06
M Series Power Amplifiers
Important Safety Instructions
Importantes Instructions de Sécurité
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 a dry cloth.
7) Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8) Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
9) Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding-type plug has
two blades and a third grounding prong. The wide blade
or 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.
11) Only use attachments/accessories specified by the manufacturer.
12) Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the cart/
apparatus combination to avoid injury from tip-over.
13) Unplug this apparatus during lightning storms or when
unused for long periods of time.
14) Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in
any way, such as power-supply cord or plug is damaged,
liquid has been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been
dropped.
15) WARNING: TO REDUCE THE RISK OF FIRE OR ELE CTRIC
SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN
OR MOISTURE.
16) DO NOT EXPOSE TO DRIPPING OR SPLASHING. DO
NOT PLACE OBJECTS FILLED WITH LIQUID, SUCH AS
VASES,ON THIS APPARATUS.
Wichtige Sicherheitsinstruktionen
Instrucciones de Seguridad Importantes
TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR
BOTTOM COVERS. NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
À PRÉVENIR LE CHOC ÉLECTRIQUE N’ENLEVEZ PAS LES
COUVERCLES. IL N’Y A PAS DES PARTIES SERVICEABLE À
L’INTÉRIEUR. TOUS REPARATIONS DOIT ETRE FAIRE PAR
PERSONNEL QUALIFIÉ SEULMENT.
PARA PREVENIR UN CHOQUE ELÉCTRICO, NO RETIRE LAS
CUBIERTAS SUPERIOR O INFERIOR. NO EXISTEN PARTES
QUE PUEDAN SER REPARADAS POR EL USUARIO AL INTERIOR. REMITA EL SERVICICO AL PERSONAL TÉCHNICAL
CALIFICADO.
TO COMPLETELY DISCONNECT THIS EQUIPMENT FROM
THE AC MAINS, DISCONNECT THE POWER SUPPLY CORD
PLUG FROM THE AC RECEPTACLE. THE MAINS PLUG OF
THE POWER SUPPLY CORD SHALL REMAIN READILY
OPERABLE.
POUR DÉMONTER COMPLÈTEMENT L'ÉQUIPEMENT DE
L'ALIMENTATION GÉNÉRALE, DÉMONTER LE CÂBLE D'ALIMENTATION DE SON RÉCEPTACLE. LA PRISE D'ALIMENTATION RESTERA AISÉMENT FONCTIONNELLE.
PARA DESCONECTAR COMPLETAMENTE EL EQUIPO DEL
SUMINSTRO ELECTRICO, DESCONECTE EL CABLE DE ALIMENTACION DE LA TOMA DE CA. LAS PATAS DEL CONECTOR DEL CABLE DE ALIMENTACIÓN DEBERAN
MANTENERSE EN BUEN ESTADO.
WATCH FOR THESE SYMBOLS:
The lightning bolt triangle is used to alert the user to the risk
of electric shock.
The exclamation point triangle is used to alert the user to
important operating or maintenance instructions.
REGARDEZ CES SYMBOLES
La triangle avec le sigle ‘’foudre’’ est employée pour alerter
l'utilisateur au risque de décharge électrique. Le triangle avec
un point d'exclamation est employée pour alerter l'utilisateur
d’instruction importantes pour lors opérations de maintenance.
ATENCION CON ESTOS SÍMBOLOS
El triángulo con el símbolo de rayo eléctrico es usado para
alertar al usuario de el riesgo de un choque eléctrico.
El triángulo con el signo de admiración es usado para alertar
al usuario de instrucciones importantes de operación o mantenimiento.
IMPORTANT
M Series amplifiers require Class 2 output wiring.
Les amplificateurs de série de M exigent des câbles de sortie de
classe 2.
M-Reihe-Verstärker verlangen Klasse die 2 Produktionsverdrahtung.
Los amplificadores de la Serie M requieren de un cableado de salida Clase 2.
MAGNETIC FIELD
CAUTION! Do not locate sensitive high-gain equipment such as
preamplifiers or tape decks directly above or below the unit.
Because this amplifier has a high power density, it has a strong
magnetic field which can induce hum into unshielded devices that
are located nearby. The field is strongest just above and below the
unit.
If an equipment rack is used, we recommend locating the amplifier(s) in the bottom of the rack and the preamplifier or other sensitive equipment at the top.
FCC COMPLIANCE NOTICE
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.
CAUTION: Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. 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. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
page 2
Operation Manual
M Series Power Amplifiers
Crown International, Inc.
Issued By: Crown International, Inc.
1718 W. Mishawaka Road
Elkhart, Indiana 46517 U.S.A.
European Representative's Name and Address:
Nick Owen
35, Bassets Field
Thornhill
Cardiff. South Glamorgen
CF14 9UG United Kingdom
Equipment Type: Commercial Audio Power Amplifiers
Family Name: CE
Model Names: M120, M240
EMC Standards:
EN 55103-1:1996 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions
EN 55103-1:1996 Magnetic Field Emissions-Annex A @ 10 cm and 1 M
EN 61000-3-2:1995+A14:2000 Limits for Harmonic Current Emissions (equipment input current ≤16A per phase)
EN 61000-3-3:1995 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current ≤16A
EN 55022:1998 + A1: 2000 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated, Class B Limits; Conducted, Class B
EN 55103-2:1996 Electromagnetic Compatibility - Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity
EN 61000-4-2:1995 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge)
EN 61000-4-3:1996 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, criteria A)
EN 61000-4-4:1995 Electrical Fast Transient/Burst Immunity (Criteria B)
EN 61000-4-5:1995 Surge Immunity (Criteria B)
EN 61000-4-6:1996 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A)
EN 61000-4-11:1994 Voltage Dips, Short Interruptions and Voltage Variation
Safety Standard:
EN 60065: 1998 Safety Requirements - Audio Video and Similar Electronic Apparatus
DECLARATION of CONFORMITY
FOR COMPLIANCE QUESTIONS ONLY:
Sue Whitfield
574-294-8289
swhitfield@crownintl.com
I certify that the product identified above conforms to the requirements of the EMC Council Directive 89/336/EEC as amended by 92/31/EEC, and the Low Voltage Directive 73/23/EES as amended by 93/68/EEC.
Signed
Larry Colburn Title: Senior Vice President of Marketing
Operation Manual
Date of Issue: March 28, 2000
page 3
Table of Contents
M Series Power Amplifiers
Important Safety Instructions .......................................................2
Declaration of Conformity ............................................................3
1 Welcome .................................................... 5
1.1 Features ...........................................................................5
1.2 How to Use This Manual ..................................................5
2 Setup ......................................................... 6
2.1 Unpack Your Amplifier ....................................................6
2.2 Install Your Amplifier ......................................................6
2.3 Ensure Proper Cooling ...................................................6
2.4 Choose Input Wire and Connectors ................................7
2.5 Choose Output Wire and Connectors ..............................7
2.6 Wire Your System ...........................................................8
2.6.1 Stereo Mode ..........................................................8
2.6.2 Bridge-Mono Mode ...............................................9
2.7 Connect to AC Mains ......................................................10
2.8 Startup Procedure ...........................................................10
3 Operation ...................................................11
3.1 Precautions .....................................................................11
3.2 Front Panel Controls and Indicators ...............................13
3.3 Back Panel Controls and Connectors...............................13
4 Advanced Features and Options .........................14
4.1 Crown SST Modules .....................................................14
4.2 Fault Monitoring ............................................................ 14
4.3 Barrier Block Outputs .................................................... 15
4.4 Tamper-Resistant Hole Plugs ......................................... 15
4.5 Optional 0.775-V Input Sensitivity Setting ..................... 15
5 Principles of Operation .................................... 16
6 Troubleshooting ............................................18
7 Specifications ..............................................19
8 Service . ....................................................21
8.1 International and Canada Service ...................................21
8.2 US Service .....................................................................21
8.2.1 Service at a US Service Center ............................. 21
8.2.2 Factory Service ..................................................... 21
8.2.3 Factory Service Shipping Instructions .................. 21
8.2.4 Packing Instructions..............................................21
8.2.5 Estimate Approval.................................................. 21
8.2.6 Payment of Non-Warranty Repairs.........................21
9 Warranty ....................................................22
Crown Factory Service Information Form ...................................25
page 4
Operation Manual
M Series Power Amplifiers
*
*
1 Welcome
The M Series of power amplifiers from Crown®
represents a new era in affordable, quality
power amplification. The line consists of two
models in a uniform, rugged chassis, incorporating the best of tried-and-true design principles and innovative features.
Modern power amplifiers are sophisticated
pieces of engineering capable of producing
extremely high power levels. They must be
treated with respect and correctly installed if
they are to provide the many years of reliable
service for which they were designed.
In addition, M Series amplifiers include a number of features which require some explanation
before they can be used to their maximum
advantage.
Please take the time to study this manual so
that you can obtain the best possible service
from your amplifier.
1.1 Features
• Accurate, uncolored sound with very low distortion for the best in music and voice reproduction.
• Bridge-mono/stereo mode switch allows
your amplifiers/speakers to be set up in the
configuration that best suits your needs.
• Advanced protection circuitry guards against
shorted outputs, open circuits, DC, mismatched loads, general overheating, high-frequency overloads and internal faults.
• Extremely versatile, handling a wide range of
speaker impedances and outputs.
• Switchable input sensitivity.
• Proportional speed fan optimizes cooling
efficiency.
• Can be mounted in EIA standard 19-in. rack,
shallow 35.5-cm rack, or stacked on top of
each other.
• Features both standard 5-way binding posts
and genuine Neutrik
nectors.
• Choice of 6.35-mm phone plug, XLR or barrier strip inputs. Optional SST crossovers may
provide other input connector options.
• Three Year, No-Fault, Fully Transferable Warranty completely protects your investment and
guarantees its specifications.
®
Speakon® output con-
1.2 How to Use This Manual
This manual provides you with the necessary
information to safely and correctly setup and
operate your amplifier. It does not cover every
aspect of installation, setup or operation that
might occur under every condition. For additional information, please consult Crown’s
Amplifier Application Guide (available online at
www.crownaudio.com), Crown Technical Support, your system installer or retailer.
We strongly recommend you read all instructions, warnings and cautions contained in this
manual. Also, for your protection, please send
in your warranty registration card today. And
save your bill of sale — it’s your official proof
of purchase.
Operation Manual
page 5
M Series Power Amplifiers
2 Setup
2.1 Unpack Your Amplifier
Please unpack and inspect your amplifier for
any damage that may have occurred during
transit. If damage is found, notify the transportation company immediately. Only you can initiate a claim for shipping damage. Crown will
be happy to help as needed. Save the shipping
carton as evidence of damage for the shipper’s
inspection.
We also recommend that you save all packing
materials so you will have them if you ever
need to transport the unit. Never ship the
unit without the factory pack.
YOU WILL NEED (not supplied):
• Input wiring cables
• Output wiring cables
Rack for mounting amplifier (or a stable surface
for stacking)
WARNING: Before you start to set up
your amplifier, make sure you read and
observe the Important Safety Instructions found at the beginning of this
manual.
2.2 Install Your Amplifier
CAUTION: Before you begin, make sure
your amplifier is disconnected from the
power source, with the power switch in
the “off” position and all level controls
turned completely down (counterclockwise).
Use a standard 19-inch (48.3 cm) equipment
rack (EIA RS-310B). See Figure 2.1 for amplifier dimensions.
You may also stack amps without using a
cabinet.
NOTE: When transporting, amplifiers should be
supported at both front and back.
2.3 Ensure Proper Cooling
When using an equipment rack, mount units
directly on top of each other. Close any open
spaces in rack with blank panels. DO NOT
block front, rear or side air vents. The side
walls of the rack should be a minimum of two
inches (5.1 cm) away from the amplifier sides,
and the back of the rack should be a minimum
of four inches (10.2 cm) from the amplifier back
panel.
Figure 2.2 illustrates standard amplifier airflow.
M240
M240
page 6
Figure 2.1
Dimensions
M240
M240
M240
M240
Figure 2.2 Airflow
Operation Manual
M Series Power Amplifiers
2 Setup
2.4 Choose Input Wire and Connectors
Crown recommends using pre-built or professionally wired, balanced line (two-conductor plus shield), 22-24 gauge cables and
connectors. Depending upon which amplifier input you choose,
you should use either 3-pin male XLR connectors, TRS phone
connectors, or terminal forks at the amplifier inputs.
Unbalanced line may also be used but may result in noise over
long cable runs.
Note: Amplifier input connectors not used for audio signal input
may be used for daisy-chaining of the audio signal to other components.
Figure 2.3 shows connector pin assignments for balanced wiring,
and Figure 2.4 shows connector pin assignments for unbalanced
wiring.
NOTE: Custom wiring should only be performed by
qualified personnel.
2.5 Choose Output Wire and Connectors
Crown recommends using pre-built or professionally wired, highquality, two- or four-conductor, heavy gauge speaker wire and
connectors. You may use two 4-pole Speakon
ure 2.5 and Table 1) or banana plugs, spade lugs, or bare wire for
your output connectors (Figure 2.6). To prevent the possibility of
short-circuits, wrap or otherwise insulate exposed loudspeaker
cable connectors.
Note: Binding post outputs on European models come
with safety plugs installed to prevent European powercord plugs from being inserted. The top & bottom entry
positions for these connectors should therefore be used
with European models.
Using the guidelines below, select the appropriate size of wire
based on the distance from amplifier to speaker.
Distance Wire Size
up to 25 ft. 16 AWG
26-40 ft. 14 AWG
41-60 ft. 12 AWG
61-100 ft. 10 AWG
101-150 ft. 8 AWG
151-250 ft. 6 AWG
CAUTION: Never use shielded cable for output wiring.
®
connectors (Fig-
Figure 2.3
Balanced Input
Connector Wiring
Figure 2.5
Left: Speakon
Right: Speakon
Table 1 Speakon® Output Pin Assignments
®
Output Connector on Back Panel
®
Cable Connector
Figure 2.4
Unbalanced Input
Connector Wiring
Figure 2.6
5-Way Binding Post Connections
Operation Manual
page 7
2 Setup
2.6 Wire Your System
M Series Power Amplifiers
2.6.1 Stereo Mode
Typical input and output wiring is shown in
Figure 2.7.
INPUTS: Connect input wiring for both channels.
OUTPUTS: Maintain proper polarity (+/–) on
output connectors.
Connect Channel-1 loudspeaker’s positive (+)
lead to Channel-1 positive (red) terminal of amp;
repeat for negative (–). Repeat Channel 2 wiring
as for Channel 1.
How to Parallel the Inputs in Stereo Mode
There are three ways to feed the same signal to
each amplifier channel:
1. Buy a "Y" cable. Plug the female end into your
signal cable, and plug the split male ends into
both amplifier inputs.
2. Feed your signal to the Channel-1 input
(either barrier-block or Combo). Connect a
jumper wire (Figure 2.8) between the barrierblock Channel-1 (+) screw terminal and the
Channel-2 (+) screw terminal. Connect another
jumper wire between the Channel-1 (–) screw
terminal and the Channel-2 (–) screw terminal.
3. Feed your signal to the Channel-1 input screw
terminals. Using a mic cable or phone-to-phone
cable, connect Channel-1 Combo jack to Channel-2 Combo jack.
Figure 2.7
System Wiring, Stereo Mode
page 8
Figure 2.8 Jumper Positions to Parallel the Inputs
Operation Manual
M Series Power Amplifiers
2 Setup
2.6.2 Bridge-Mono Mode
Typical input and output wiring is shown in
Figure 2.9.
Set the Mode Switch to Bridge.
INPUTS: Use only the Channel-1 input connector.
NOTE: Crown provides a reference of wiring pin
assignments for commonly used connector
types in the Crown Amplifier Application Guide
available at www.crownaudio.
OUTPUTS: If you are using the 5-way binding
posts, connect the speaker across the red binding post of each channel. Do not use the black
binding posts when the amp is being operated in
Bridge-Mono mode.
®
If you are using the Speakon
only the Channel 1 connector.
NOTE: The Channel 2 level control MUST
be turned down (full CCW) when operating the amplifier in Bridge-Mono mode.
connectors, use
System Wiring, Bridge-Mono Mode
Figure 2.9
Operation Manual
page 9
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