Crown M Series Operation Manual

M Series

Operation Manual

Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your 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: Crown and Amcron are registered trademarks of Crown International. Other trademarks are the property of their respective owners.

Some models may be exported under the name Amcron.

®

©2006 by Crown Audio ® Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000

M120

M240

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 ELECTRIC

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 INTE-

RIOR. 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'ALI-

MENTATION DE SON RÉCEPTACLE. LA PRISE D'ALIMEN-

TATION RESTERA AISÉMENT FONCTIONNELLE.

PARA DESCONECTAR COMPLETAMENTE EL EQUIPO DEL

SUMINSTRO ELECTRICO, DESCONECTE EL CABLE DE ALI-

MENTACION DE LA TOMA DE CA. LAS PATAS DEL CONEC-

TOR 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


Crown International, Inc.

DECLARATION of CONFORMITY

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

FOR COMPLIANCE QUESTIONS ONLY: Sue Whitfield

574-294-8289 [email protected]

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

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

Date of Issue: March 28, 2000

Larry Colburn Title: Senior Vice President of Marketing


page 3

Table of Contents

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




*

*

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

®

Speakon

®

output connectors.

• 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.

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.

page 5

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.

page 6

Figure 2.1

Dimensions

Figure 2.2 Airflow



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

®

connectors (Figure 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.


Figure 2.3

Balanced Input

Connector Wiring

Figure 2.5

Left: Speakon

®

Output Connector on Back Panel

Right: Speakon

®

Cable Connector

Table 1 Speakon

®

Output Pin Assignments

Figure 2.4

Unbalanced Input

Connector Wiring

Figure 2.6

5-Way Binding Post Connections

page 7

2 Setup

2.6 Wire Your System

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

Figure 2.8 Jumper Positions to Parallel the Inputs


page 8



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

®

connectors, use 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.


Figure 2.9

System Wiring, Bridge-Mono Mode

page 9

2 Setup

2.7 Connect to AC Mains

Connect your amplifier to the AC mains power source (power outlet) with the supplied AC power cordset. First, connect the IEC end of the cordset to the IEC connector on the amplifier; then, plug the other end of the cordset to the AC mains.

WARNING: The third prong of this connector

(ground) is an important safety feature. Do not attempt to disable this ground connection by using an adapter or other methods.

Amplifiers don’t create energy. The AC mains voltage and current must be sufficient to deliver the power you expect. You must operate your amplifier from an AC mains power source with not more than a 10% variation above or a 15% variation below the amplifier’s specified line voltage and within the specfied frequency requirements (indicated on the amplifier’s back panel label). If you are unsure of the output voltage of your AC mains, please consult your electrician.


2.8 Startup Procedure

Use the following procedure when first turning on your amplifier:

1.

Turn down the level of your audio source.

2.

Turn down the level controls of the amplifier.

3.

Turn on the “Power” switch. The Power indicator should glow.

4.

Turn up the level of your audio source to an optimum level.

5.

Turn up the Level controls on the amplifier until the desired loudness or power level is achieved.

6.

Turn down the level of your audio source to its normal range.

If you ever need to make any wiring or installation changes, don’t forget to disconnect the power cord.

For help with determining your system’s optimum gain structure (signal levels) please refer to the

Crown Amplifier Application Guide, available online at www.crownaudio.com.

page 10



3 Operation

3.1 Precautions

Your amplifier is protected from internal and external faults, but you should still take the following precautions for optimum performance and safety:

1.

Before use, your amplifier first must be configured for proper operation, including input and output wiring hookup. Improper wiring can result in serious operating difficulties. For information on wiring and configuration, please consult the Setup section of this manual or, for advanced setup techniques, consult Crown’s

Amplifier Application Guide available online at www.crownaudio.com.

2.

Use care when making connections, selecting signal sources and controlling the output level.

The load you save may be your own!

3.

Do not short the ground lead of an output cable to the input signal ground. This may form a ground loop and cause oscillations.

4. WARNING: Never connect the output to a power supply, battery or power main.

Electrical shock may result.

5.

Tampering with the circuitry, or making unauthorized circuit changes may be hazardous and invalidates all agency listings.

6.

Do not operate the amplifier with the red Clip

LEDs constantly flashing.

7.

Do not overdrive the mixer, which will cause clipped signal to be sent to the amplifier. Such signals will be reproduced with extreme accuracy, and loudspeaker damage may result.

8.

Do not operate the amplifier with less than the rated load impedance. Due to the amplifier’s output protection, such a configuration may result in premature clipping and speaker damage.

Remember: Crown is not liable for damage that results from overdriving other system components.


page 11

3 Operation


E. Ch-1 Level Control E. Ch-2 Level Control

I

page 12

A. Power Switch

F. Barrier Block

Inputs

B. Reset Switch

G. Neutrik Combo

(1/4-inch & XLR) Inputs

J. Fault Output

K. Stereo/

Bridge-Mono

Switch

ST

ER

EO

BR

ID

G

E

1.4

V

26 dB

MODE SENSITIVITY

L. Input

Sensitivity

Switch

C. Power Indicator

H. 5-way Binding Post

Output Connectors

PIN

1+

1-

2+

2-

OUTPUT ASSIGNMENT

CH PIN

2

2

1+

1-

2+

2-

CH2 CH1

CH

1

1

2

2

D. Ch-1 Signal,

Clip& Fault

Indicators

WARNING

ó TO REDUCE THE RISK OF FIRE OR

ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT

TO RAIN OR MOISTURE.

AVIS -

RISQUE DE CHOC ELECTRIQUE - NE PAS

OUVRIR.

AVERTISSEMENT -

ENERGIE ELECTRIQUE

DANGEREUSE VIOR LA NOTICE DE FONCTIONNEMENT.

CLASS 2 WIRING PERMITTED

CLASS 1 WIRING REQUIRED IN

BRIDGE MONO CONNECTION

FOR BRIDGE MONO, USE CH1+,

(FOR +) AND CH2+, (FOR -)

ONLY

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

MODEL: M240

D. Ch-2 Signal, Clip

& Fault Indicators

I. IEC Power

Cord Connector

M. Neutrik Speakon

®

Outputs

Figure 3.1 Front Panel and Back Panel Controls, Indicators and Connectors



3 Operation

3.2 Front Panel Controls and Indicators

A. Power Switch

Switch turns the amplifier on (“ | ”) or off

(“ 0 ”).

B. Reset Switch

This front-panel pushbutton is used to reset the circuit breaker that protects the power supply.

C. Power Indicator

Green LED indicates amplifier has been turned on and AC power is available.

D. Signal, Clip and Fault Indicators

Signal: A green LED for each channel flashes when a low-level signal (

≥ 40 dBm) is present at the input.

Clip: A red LED for each channel turns on when distortion becomes audible in the amplifier output.

Fault: Normally off, this red indicator will blink under fault conditions. See Section

6, Troubleshooting.

E. Level Controls: Detented rotary level control for each channel.

3.3 Back Panel Controls and Connectors

F. Barrier Block Inputs: May be wired balanced or unbalanced.

G. Neutrik

®

Combo Inputs: 1/4-inch phone and XLR inputs. May be wired balanced or unbalanced.

H. 5-way Binding Post Outputs: One pair per channel; accept banana plugs, spade lugs or bare wire. Note: Binding post outputs on

European models come with safety plugs installed to prevent European power-cord plugs from being inserted. The side entry positions for these connectors should therefore be used with European models.

I. IEC Power Connector

J. Fault Output: RJ11 jack allows monitoring of the amplifier’s Fault status from a remote location. See Section 4.2.

K. Stereo/Bridge-Mono Switch: Two-position switch selects either Stereo or Bridge-

Mono operation.

L. Input Sensitivity Switch: Two-position switch selects either 1.4 V sensitivity or 26 dB gain.

M. Neutrik

®

Speakon

®

Outputs: Two Neutrik Speakon NL3MP output connectors (mates with NL4FC). See Figure 2.5 and Table 1 for connector wiring.


page 13

4 Advanced Features and Options

4.1 Crown SST Modules

Crown optional SST (System Solution Topologies) modules were specially designed to improve the versatility of your audio system.

They feature a variety of professional signal routing and filtering capabilities, with active crossovers that allow the audio signal to be split and sent to auxiliary amplifiers. Your amplifier may have come with an SST module already factory-installed, or your choice of SST modules can be easily added to the amplifier by any authorized Crown Service Center.

For information on wiring and configuration of amplifiers equipped with an optional Crown

SST crossover module, please refer to the SST

Crossover Reference Manual included in your literature package.

For more information and for newer SST modules, see the Crown website at www.crownaudio.com.

4.2 Fault Monitoring

The Fault (RJ-11) jack, which looks like a telephone plug, is located on the back of your M-

Series amplifier. It gives you an easy way to remotely monitor the amplifier’s fault status. To set up a circuit that will cause an LED to light whenever a fault status occurs, you can simply use the suggested circuit shown in Figure 4.1.

When using this circuit, the LED will glow whenever the amplifier is in one of four states: a channel’s heatsink has reached its temperature limit, the transformer has reached its temperature limit, the amplifier has just been turned on and is in its turn-on-delay mode, or the amplifier is turned off.

If you choose to design your own circuit to interface this signal to your system, note that this RJ jack is polarity sensitive. Pin 2 must be grounded, and Pin 5 must be supplied with a positive voltage pull up (positive with respect to ground). Refer to Figure 4.2 for RJ jack pin assignments.

The mating connector for the M-Series RJ11 jack contains 4 contact pins in a 6-slot case, as shown. For additional information please contact your local dealer or Crown Technical Support.

The maximum signal that can be exposed to the fault jack is 35 VDC and 10 mA. Best results are obtained with 10 mA LEDs.


page 14

Figure 4.1 Fault Status LED Circuitry

Figure 4.2 RJ Jack Wiring and Pin Assignments



4 Advanced Features and Options

4.3 Optional Barrier Block Outputs

If you prefer, the 5-way binding post outputs on your M-Series amplifier can be replaced with model CEAS1 barrier block outputs (see Figure

4.3). You can order your M-Series amplifier with barrier block outputs factory-installed on new amplifiers or they can be added to existing

M-Series amplifiers by an authorized Crown

Service Center. Please contact Crown Technical

Support or your local Crown Service Center for more information on this option.

4.4 Tamper-Resistant Hole Plugs

Your M-Series amplifier comes with a set of tamper-resistant hole plugs, which allow you to

“protect” the level controls against unauthorized adjustment. To use, simply pull off the control knobs from the front of the amp, and slip the hole plugs into place (see Figure 4.4).

The plugs should slide easily into position, without forcing. Once in place, the plugs will help to avoid most accidental or intentional tampering (some situations may require additional security measures).

To remove the hole plugs, simply pry the plug away from the amplifier case using a small, flatblade screwdriver. To help to ensure adequate security, the plugs have been designed to be more difficult to remove than to place into position. If necessary, additional hole plugs can be purchased separately from Crown’s Parts

Department (Part # 103234-1).

Store your knobs in a safe location should you need to make level adjustments in the future.

4.5 Optional 0.775-V Input Sensitivity Setting

The M-Series amplifier also provides an optional 0.775-V input sensitivity setting. If you determine your application requires this sensitivity setting, please contact Crown Technical

Support for more information.

Figure 4.3 Model CEAS1 Barrier Block Ouput Connectors


Figure 4.4 Tamper-Resistant Hole Plugs Installed in an M-Series Amplifier

page 15


5 Principles of Operation

For the sake of simplicity, only channel one of the amplifier is described.

Signal is presented to the M120 and M240 through one of three connectors when using the standard input module. Each channel is outfitted with a balanced XLR / phone jack, and a barrier strip. These connectors are wired in parallel, which allows daisy chaining when needed. The signal is then converted from balanced to unbalanced in the Balanced Input

Stage where it also receives RFI protection.

Signal then flows into the Variable Gain Stage where the front panel level controls are allowed to affect the gain.

Figure 5.1

M-Series Amplifier

Block Diagram

(Shown with Standard Input Module)

BALANCED

INPUTS

Following this stage, the signal is put under the control of a full-time compressor circuit comprised of a symmetrical window detector, a buffer amplifier, and the gating op amp which uses several small components to set the compressor’s attack and decay characteristics. The actual compressing is accomplished by an opto-isolator which affects the gain in the signal path.

The signal next enters the main amplifier error amp where it is mixed with a small portion of the output signal in such a way as to control the amplifier’s overall output performance.

Following the error amp is the LVA stage, which is where the low-voltage referenced signal gets translated to the output high-voltage rails. The last voltage amplifier, in conjunction with a bootstrapped current source, drives both predrivers and the bias servo. The bias servo is mounted in such a way as to translate the output heatsink temperature into a controlled bias current to prevent thermal runaway and hold the amplifier’s notch distortion to a minimum.

The predrivers provide enough signal to activate the drivers, which together operate in the class AB range. For the major output current requirements, the drivers feed the various numbers of paralleled output transistors which operate in a class B mode. This we call the Triple-Deep Darlington Output Stages.

TO CLIP

INDICATOR

COMPRESSOR

CONTROL

TRANSLATOR

BALANCE

INPUT STAGE

VARIABLE

GAIN STAGE

BUFFER

TO SIGNAL

PRESENCE

INDICATOR

ERROR

AMP

DC PROTECT

LOGIC

–VCC

+ HI-VOLTAGE

BOOTSTRAP

CURRENT

SOURCE

LVA

–VCC

TURN-ON

DELAY

TDVI

LIMITER

TRIPLE-DEEP

DARLINGTON

NPN POSITIVE

OUTPUT STAGE

HEATSINK

TEMPERATURE

OUTPUT

CONTROL

TRIPLE-DEEP

DARLINGTON

NPN NEGATIVE

OUTPUT STAGE

HEATSINK

TEMPERATURE

DC

PROTECT

TRANSFORMER

TEMPERATURE

TO FAULT

INDICATOR

+

OUTPUT

PROPORTIONAL

SPEED

FAN

CONTROL

POWER

SUPPLY

+ VCC

+ 15V

– 15V

– VCC

TO

FAULT

CONNECTOR

FAN

BOOTSTRAP

CIRCUIT

+ HI-VOLTAGE

BOOTSTRAP

MUTE

page 16



5 Principles of Operation

The output transistors are protected by the Time

Dependent Voltage & Current circuit. This circuit protects the devices from extending beyond their safe area of operation, but allows the devices to provide high bursts of peak power with music, allowing your amplifier to deliver more punch. When all is said and done, this amplifier output topology offers a good combination of low quiescent amplifier heating, great distortion performance at high powers, and relative simplicity, with impressive reliability and value.

For extended flexibility, all of the amplifier’s output power is delivered through the Channel

1 Neutrik

®

Speakon

® connector. Both Channel

1 and 2 output terminals are wired through the

Channel 1 connector, allowing dual or bridge mono applications to be available with one speaker cable. Refer to Figure 2.3 and Table 1 for Neutrik

®

Speakon

®

output pin assignments.

The output relay, in conjunction with input signal mute circuit, assures the amplifier will be well-behaved during turn on and off. In the event of an amplifier output failure, a triac will activate to turn off the offending channel and protect your speakers.

The turn on delay circuit functions to keep the output relay open until all the voltages are up and stable, both in the amplifier, and in all the components in the system ahead of the amplifier.

Heatsink temperature is monitored by a thermal probe attached to the heatsink. As the temperature rises, the probe sends a proportional current to the proportional speed fan circuit which starts the fan. Should the power transformer reach its maximum safe temperature, an internal thermal switch opens and the fan circuit turns on full speed to quickly cool down the amplifier. It also disconnects the load via the output relay, removing any output current and further speeding a cool-down cycle. Extra care was taken during the design stage to set this point both to protect your investment and to guard against nuisance tripping.

Whenever the heatsinks or the transformer reach a maximum temperature, or during the normal turn on delay window, the front panel

Fault LEDs will blink to get your attention.

A modular RJ-11 jack is mounted on the back panel (similar to the type used on telephones).

Pins 2 and 5 are connected to an opto-isolator which is always in a low-resistance state whenever the unit is on and happy. Should a fault be detected or should the amplifier lose AC power, the opto-isolator will change to a high resistance, allowing the user to remotely detect the status of the amplifier.

The Signal Presence Indicators tap the signal chain just before the level controls and prior to the power amplifier chain. They are not amplifier output indicators and should only be used to indicate the presence of signal to the amplifier front end.

The Clip light is driven from the output of the compressor circuitry and lights to indicate the onset of audible distortion. The Power LED is driven from the low-voltage supply.

A positive and negative regulator form the ±15volt power supplies. Add to that the main transformer, a full-wave bridge rectifier, and high energy electrolytics to form the main power supply. They are protected by the front-panel line circuit breaker and controlled by the frontpanel power switch.


page 17

6 Troubleshooting

CONDITION: Power indicator is

off.

POSSIBLE REASON

• The amplifier has lost AC power.

• The amplifier’s Power switch is off.

• The amplifier’s power cord is not plugged in at either end.

The amplifier’s circuit breaker has tripped.

Allow the amplifier to cool; remove excessive loads, and press the reset switch on the front panel.

CONDITION: No input signal (Signal indicator is not flashing even though audio is applied).

POSSIBLE REASON:

• Input signal level is very low.

• Master audio from mixer turned down.

• Input cable broken or not plugged in.

CONDITION: Fault indicator is flashing.

POSSIBLE REASON:

• The amplifier has just been turned on and is still in the 4-second turn-on delay.

• The heatsinks are too hot.

• The transformer thermal protection is activated.

• The amplifier output wires have developed a short circuit.

• The amplifier output stage has stopped operating. Refer the unit to an authorized

Crown Service Center.

The fault status of the amplifier can also be monitored remotely by attaching a signal device to the Fault jack located on the amplifier back panel. See the Advanced Features and Options section for more detail.

page 18


CONDITION: Distorted sound.

POSSIBLE REASON:

• Load is wired incorrectly or Stereo/Mono mode switch is set incorrectly. Check both.

• Input signal level is too high. Turn down your amplifier level controls, or turn down the input signal, until the clip LED goes out.

Note: If sound is distorted but clip LED is not flashing, check mixer levels and gain staging, mixer clip lights, and pads built into microphones.

CONDITION: Input signal but no sound.

POSSIBLE REASON:

• Speakers not connected. Make sure the Neutrik

NL4 connector is fully seated and locked.

The amplifier output level is so high that the breaker has tripped. Try to identify and correct the problem before resetting the breakers. If the problem persists, refer the unit to an authorized Crown Service Center.



7 Specifications

Minimum Guaranteed Power

1 kHz with 0.5% THD

Stereo, 2 ohms (per ch.)



Bridge mono, 4 ohms

Bridge mono, 8 ohms

Performance

Sensitivity (volts RMS) for full rated power at 8 ohms

Frequency Response (at 1 watt, 20Hz - 25 kHz)

Phase Response (at 1 watt , 20Hz to 20 kHz)

Signal to Noise Ratio below rated 1 kH power

A-weighted

20Hz to 20kHz

Total Harmonic Distortion (THD) at 1 full bandwidth power, from 20 Hz to 20 kHz

Intermodulation Distortion (IMD) 60 Hz and 7 kHz at 4:1,

from full rated output to –35 dB

M120

570W

465W

285W

1,120W

920W

M120

1.4 V, switchable to 26 dB gain

± 0.2 dB

±15°

> 105 dB

> 100 dB

< 1.0%

< 0.1%

M240

1,000W

680W

405W

2,000W

1,380W

M240

1.4 V, switchable to 26 dB gain

± 0.2 dB

±15°

> 105 dB

> 100 dB

< 1.0%

< 0.1%

Figure 7.2 Output Pin Assignments


Figure 7.1 Typical Frequency (Amplitude) Response

page 19


7 Specifications

Performance

Damping Factor (8 ohm): 10 Hz to 400 Hz

Crosstalk (below rated power, 20 Hz to 20 kHz)

Common Mode Rejection (CMR)(20 Hz to 1 kHz)

DC Output Offset (Shorted input)

Input Impedance (nominally balanced, nominally unbalanced)

Load Impedance (Note: Safe with all types of loads)

Stereo

Bridge Mono

Voltage Gain (at maximum level setting)

AC Line Voltage and Frequency Configurations Available (± 10%)

AC Line Current (both amplifiers draw no more than 90 watts at idle)

Construction

Ventilation

Cooling

Dimensions

Weight

Net

Shipping

M120

> 400

> 55 dB

> 70 dB

± 10 mV

20 kilohms, 10 kilohms

2-8 ohms

4-8 ohms

30.5-dB gain at 1.4-volt sensitivity

26-dB gain at 2.34-volt sensitivity

230/240 VAC and 50/60 Hz

3.5 A

M120

Flow-through ventilation from front to back

Proportional speed fan

EIA Standard 19-inch rack mount width (EIA

RS-310B), 5.25-inch (13.34-cm) height and

12.25-inch (31.11-cm) depth behind front mounting surface

M240

> 400

> 55 dB

> 70 dB

± 10 mV

20 kilohms, 10 kilohms

2-8 ohms

4-8 ohms

32.1-dB gain at 1.4-volt sensitivity

26-dB gain at 2.83-volt sensitivity

230/240 VAC and 50/60 Hz

5.0

M240

Flow-through ventilation from front to back

Proportional speed fan

EIA Standard 19-inch rack mount width (EIA

RS-310B), 5.25-inch (13.34-cm) height and

12.25-inch (31.11-cm) depth behind front mounting surface

32.6 pounds (14.79 kg)

38.6 pounds (17.49 kg)

40.3 pounds (18.28 kg)

46.3 pounds (20.98 kg)

page 20



8 Service

Crown amplifiers are quality units that rarely require servicing. Before returning your unit for service, please contact Crown Technical Support to verify the need for servicing.

This unit has very sophisticated circuitry which should only be serviced by a fully trained technician. This is one reason why each unit bears the following label:

CAUTION: To prevent electric shock, do not remove covers. No user serviceable parts inside. Refer servicing to a qualified technician.

Complete the Crown Audio Factory Service Information form, in the back of this manual, when returning a Crown product to the factory or authorized service center. The form must be included with your product inside the box or in a packing slip envelope securely attached to the outside of the shipping carton. Do not send this form separately.

8.1 International and Canada Service

Service may be obtained from an authorized service center. (Contact your local Crown/Amcron representative or our office for a list of authorized service centers.) To obtain service, simply present the bill of sale as proof of purchase along with the defective unit to an authorized service center. They will handle the necessary paperwork and repair.

Remember to transport your unit in the original factory pack.

8.2 US Service

Service may be obtained in one of two ways: from an authorized service center or from the factory. You may choose either. It is important that you have your copy of the bill of sale as your proof of purchase.

8.2.1 Service at a US Service Center

This method usually saves the most time and effort. Simply present your bill of sale along with the defective unit to an authorized service center to obtain service. They will handle the necessary paperwork and repair. Remember to transport the unit in the original factory pack. A list of authorized service centers in your area can be obtained from Crown Factory Service, or online from http://www.crownaudio.com/support/servcent.htm.

8.2.2 Factory Service

Crown accepts no responsibility for non-serviceable product that is sent to us for factory repair. It is the owner’s responsibility to ensure that their product is serviceable prior to sending it to the factory. Serviceable product list is available at http://crownweb.crownintl.com/crownrma/.

For more information, please contact us direct.

A Service Return Authorization (SRA) is required for product being sent to the factory for repair. An SRA can be completed online at www.crownaudio.com/support/ factserv.htm. If you do not have access to the web, please call Crown’s Customer Service at 574.294.8200 or

800.342.6939 extension 8205.

For warranty service, we will pay for ground shipping both ways in the United States. Contact Crown Customer

Service to obtain prepaid shipping labels prior to sending the unit. Or, if you prefer, you may prepay the cost of shipping, and Crown will reimburse you. Send copies of the shipping receipts to Crown to receive reimbursement.

Your repaired unit will be returned via UPS ground.

Please contact us if other arrangements are required.

8.2.3 Factory Service Shipping Instructions:

1.

Service Return Authorization (SRA) is required for product being sent to the factory for service. Please complete the SRA by going to www.crownaudio.com/support/factserv.htm. If you do not have access to our website, call

1.800.342.6939, extension 8205 and we'll create the

SRA for you.

2.

See packing instructions that follow.

3.

Ship product to:

CROWN AUDIO FACTORY SERVICE

1718 W MISHAWKA RD.

ELKHART, IN 46517

4.

Use a bold black marker and write the SRA number on three sides of the box.

5.

Record the SRA number for future reference. The

SRA number can be used to check the repair status.

8.2.4 Packing Instructions

Important: These instructions must be followed. If they are not followed, Crown Audio, Inc. assumes no responsibility for damaged goods and/or accessories that are sent with your unit.

1.

Fill out and include the Crown Audio Factory Service Information sheet in the back of this manual.

2.

Do not ship any accessories (manuals, cords, hardware, etc.) with your unit. These items are not needed to service your product. We will not be responsibility for these items.

3.

When shipping your Crown product, it is important that it has adequate protection. We recommend you use the original pack material when returning the product for repair. If you do not have the original box, please call Crown at 800.342.6939 or

574.294.8210 and order new pack material. See instructions for “foam-in-place” shipping pack. (Do not ship your unit in a wood or metal cabinet.)

4.

If you provide your own shipping pack, the minimum recommended requirements for materials are as follows:

a. 275 P.S.I. burst test, Double-Wall carton that allows for 2-inch solid Styrofoam on all six sides of unit or

3 inches of plastic bubble wrap on all six sides of unit.

b.

Securely seal the package with an adequate carton sealing tape.

c. Do not use light boxes or “peanuts”. Damage caused by poor packaging will not be covered under warranty.

Using your 'foam-in-place' shipping pack

Note: The foam-in-place packing is molded so that there is only one correct position for your product.

1.

Open carton and lift center cushion leaving both end-cushions in place.

2.

Carefully place your product with the product's front panel facing the same direction as arrows indicate.

3.

Reset center cushion down over top of product's chassis. The foam-in-place packing was molded to accommodate different chassis depth sizes. If your product's chassis does not completely fill the foamin-place cavity, you may use a soft but solid packing material (such as paper or bubble wrap) behind the chassis.

4.

Enclose the completed Crown Audio Factory Service

Information form (or securely attach it to the outside of carton) and re-seal the shipping pack with a sturdy carton sealing tape.

8.2.5 Estimate Approval

Approval of estimate must be given within 90 days after being notified by Crown Audio Inc. Units still in the possession of Crown after 90 days of the estimate will become the property of Crown Audio Inc.

8.2.6 Payment of Non-Warranty Repairs

Payment on out-of-waranty repairs must be received within 90 days of the repair date. Units unclaimed after

90 days become the property of Crown Audio Inc.

If you have any questions, please contact Crown Factory

Service.

Crown Factory Service

1718 W. Mishawaka Rd.,

Elkhart, Indiana 46517 U.S.A.

Telephone:

574.294.8200

800.342.6939 (North America,

Puerto Rico, and Virgin Islands only)

Facsimile:

574.294.8301 (Technical Support)

574.294.8124 (Factory Service)

Internet: http://www.crownaudio.com


page 21

9 Warranty

3

YEAR


UNITED STATES & CANADA

SUMMARY OF WARRANTY

Crown International, 1718 West Mishawaka Road,

Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUB-

SEQUENT OWNER of each NEW Crown product, for a period of three (3) years from the date of purchase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship. We further warrant the new Crown product regardless of the reason for failure, except as excluded in this Warranty.

ITEMS EXCLUDED FROM THIS

CROWN WARRANTY

This Crown Warranty is in effect only for failure of a new Crown product which occurred within the

Warranty Period. It does not cover any product which has been damaged because of any intentional misuse, accident, negligence, or loss which is covered under any of your insurance contracts.

This Crown Warranty also does not extend to the new Crown product if the serial number has been defaced, altered, or removed.

WHAT THE WARRANTOR WILL DO

We will remedy any defect, regardless of the reason for failure (except as excluded), by repair, replacement, or refund. We may not elect refund unless you agree, or unless we are unable to provide replacement, and repair is not practical or cannot be timely made. If a refund is elected, then you must make the defective or malfunctioning product available to us free and clear of all liens or other encumbrances. The refund will be equal to the actual purchase price, not including interest, insurance, closing costs, and other finance charges less a reasonable depreciation on the product from the date of original purchase. Warranty work can only be performed at our authorized service centers or at the factory. Warranty work for some products can only be performed at our factory. We will remedy the defect and ship the product from the service center or our factory within a reasonable time after receipt of the defective product at our authorized service center or our factory. All expenses in remedying the defect, including surface shipping costs in the United

States, will be borne by us. (You must bear the expense of shipping the product between any foreign country and the port of entry in the United

States including the return shipment, and all taxes, duties, and other customs fees for such foreign shipments.)

HOW TO OBTAIN WARRANTY

SERVICE

You must notify us of your need for warranty service within the warranty period. All components must be shipped in a factory pack, which, if needed, may be obtained from us free of charge.

Corrective action will be taken within a reasonable time of the date of receipt of the defective product by us or our authorized service center. If the repairs made by us or our authorized service center are not satisfactory, notify us or our authorized service center immediately.

DISCLAIMER OF CONSEQUENTIAL

AND INCIDENTAL DAMAGES

YOU ARE NOT ENTITLED TO RECOVER FROM

US ANY INCIDENTAL DAMAGES RESULTING

FROM ANY DEFECT IN THE NEW CROWN

PRODUCT. THIS INCLUDES ANY DAMAGE TO

ANOTHER PRODUCT OR PRODUCTS RESULT-

ING FROM SUCH A DEFECT. SOME STATES DO

NOT ALLOW THE EXCLUSION OR LIMITATIONS

OF INCIDENTAL OR CONSEQUENTIAL DAM-

AGES, SO THE ABOVE LIMITATION OR EXCLU-

SION MAY NOT APPLY TO YOU.

WARRANTY ALTERATIONS

No person has the authority to enlarge, amend, or modify this Crown Warranty. This Crown Warranty is not extended by the length of time which you are deprived of the use of the new Crown product. Repairs and replacement parts provided under the terms of this Crown Warranty shall carry only the unexpired portion of this Crown

Warranty.

DESIGN CHANGES

We reserve the right to change the design of any product from time to time without notice and with no obligation to make corresponding changes in products previously manufactured.

LEGAL REMEDIES OF PURCHASER

THIS CROWN WARRANTY GIVES YOU SPECIFIC

LEGAL RIGHTS, YOU MAY ALSO HAVE OTHER

RIGHTS WHICH VARY FROM STATE TO STATE.

No action to enforce this Crown Warranty shall be commenced after expiration of the warranty period.

THIS STATEMENT OF WARRANTY SUPERSEDES

ANY OTHERS CONTAINED IN THIS MANUAL

FOR CROWN PRODUCTS. 12/01

page 22



9 Warranty

3

YEAR

WORLDWIDE EXCEPT USA & CANADA

SUMMARY OF WARRANTY

Crown International, 1718 West Mishawaka Road,

Elkhart, Indiana 46517-4095 U.S.A. warrants to you, the ORIGINAL PURCHASER and ANY SUB-

SEQUENT OWNER of each NEW Crown1 product, for a period of three (3) years from the date of purchase by the original purchaser (the “warranty period”) that the new Crown product is free of defects in materials and workmanship, and we further warrant the new Crown product regardless of the reason for failure, except as excluded in this

Warranty.

1 Note: If your unit bears the name “Amcron,” please substitute it for the name “Crown” in this warranty.

ITEMS EXCLUDED FROM THIS CROWN-

WARRANTY

This Crown Warranty is in effect only for failure of a new Crown product which occurred within the

Warranty Period. It does not cover any product which has been damaged because of any intentional misuse, accident, negligence, or loss which is covered under any of your insurance contracts.

This Crown Warranty also does not extend to the new Crown product if the serial number has been defaced, altered, or removed.

WHAT THE WARRANTOR WILL DO

We will remedy any defect, regardless of the reason for failure (except as excluded), by repair, replacement, or refund. We may not elect refund unless you agree, or unless we are unable to provide replacement, and repair is not practical or cannot be timely made. If a refund is elected, then you must make the defective or malfunctioning product available to us free and clear of all liens or other encumbrances. The refund will be equal to the actual purchase price, not including interest, insurance, closing costs, and other finance charges less a reasonable depreciation on the product from the date of original purchase. Warranty work can only be performed at our authorized service centers. We will remedy the defect and ship the product from the service center within a reasonable time after receipt of the defective product at our authorized service center.

HOW TO OBTAIN WARRANTY SERVICE

You must notify your local Crown importer of your need for warranty service within the warranty period. All components must be shipped in the original box. Corrective action will be taken within a reasonable time of the date of receipt of the defective product by our authorized service center.

If the repairs made by our authorized service center are not satisfactory, notify our authorized service center immediately.

DISCLAIMER OF CONSEQUENTIAL AND

INCIDENTAL DAMAGES

YOU ARE NOT ENTITLED TO RECOVER FROM US

ANY INCIDENTAL DAMAGES RESULTING FROM

ANY DEFECT IN THE NEW CROWN PRODUCT.

THIS INCLUDES ANY DAMAGE TO ANOTHER

PRODUCT OR PRODUCTS RESULTING FROM

SUCH A DEFECT.

WARRANTY ALTERATIONS

No person has the authority to enlarge, amend, or modify this Crown Warranty. This Crown Warranty is not extended by the length of time which you are deprived of the use of the new Crown product.

Repairs and replacement parts provided under the terms of this Crown Warranty shall carry only the unexpired portion of this Crown Warranty.

DESIGN CHANGES

We reserve the right to change the design of any product from time to time without notice and with no obligation to make corresponding changes in products previously manufactured.

LEGAL REMEDIES OF PURCHASER

No action to enforce this Crown Warranty shall be commenced after expiration of the warranty period.

THIS STATEMENT OF WARRANTY SUPERSEDES

ANY OTHERS CONTAINED IN THIS MANUAL FOR

CROWN PRODUCTS. 7/01


page 23

page 24

THIS PAGE INTENTIONALLY LEFT BLANK




Crown Audio Factory Service Information

Shipping Address: Crown Audio Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517

PLEASE PRINT CLEARLY

SRA #: __________________(If sending product to Crown factory service.) Model: ____________________________________________ Serial Number: _____________________ Purchase Date: _____________

PRODUCT RETURN INFORMATION

Individual or Business Name: ____________________________________________________________________________________________________________________________________________________________

Phone #: __________________________________________________ Fax #: ________________________________________ E-Mail: _______________________________________________________

Street Address (please, no P.O. Boxes): _____________________________________________________________________________________________________________________________________________________

City: __________________________________________ State/Prov: ________________________________ Postal Code: _________________ Country: _________________________

Nature of problem: ___________________________________________________________________________________________________________________________________________________________________

_________________________________________________________________________________________________________________________________________________________________________________

_________________________________________________________________________________________________________________________________________________________________________________

Other equipment in your system: _________________________________________________________________________________________________________________________________________________________

If warranty is expired, please provide method of payment. Proof of purchase may be required to validate warranty.

PAYMENT OPTIONS

I have open account payment terms. Purchase order required. PO#: __________________________________ COD

Credit Card (Information below is required; however if you do not want to provide this information at this time, we will contact you when your unit is repaired for the information.)

Credit card information:

Type of credit card:

MasterCard Visa American Express Discover

Type of credit card account: Personal/Consumer Business/Corporate

Card # ______________________________________________ Exp. date: _____________ * Card ID #: __________________________

* Card ID # is located on the back of the card following the credit card #, in the signature area. On American Express, it may be located on the front of the card. This number is required to process the charge to your account. If you do not want to provide it at this time, we will call you to obtain this number when the repair of your unit is complete.

Name on credit card: ____________________________________________________________________________

Billing address of credit card: __________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________


page 25

page 26







page 27

Crown M Series Operation Manual

Assistant Bot

M Series

Operation Manual

M120

M240

Important Safety Instructions

Importantes Instructions de Sécurité

Wichtige Sicherheitsinstruktionen

Instrucciones de Seguridad Importantes

FCC COMPLIANCE NOTICE

page 2

DECLARATION of CONFORMITY

page 3

Table of Contents

page 4

1 Welcome

page 5

2 Setup

page 6

2 Setup

page 7

2 Setup

page 8

2 Setup

page 9

2 Setup

page 10

3 Operation

page 11

3 Operation

E. Ch-1 Level Control E. Ch-2 Level Control

page 12

A. Power Switch

F. Barrier Block

Inputs

B. Reset Switch

G. Neutrik Combo

(1/4-inch & XLR) Inputs

J. Fault Output

K. Stereo/

Bridge-Mono

Switch

L. Input

Sensitivity

Switch

C. Power Indicator

H. 5-way Binding Post

Output Connectors

D. Ch-1 Signal,

Clip& Fault

Indicators

D. Ch-2 Signal, Clip

& Fault Indicators

I. IEC Power

Cord Connector

M. Neutrik Speakon

Outputs

3 Operation

page 13

4 Advanced Features and Options

page 14

4 Advanced Features and Options

page 15

5 Principles of Operation

page 16

5 Principles of Operation

page 17

6 Troubleshooting

page 18

7 Specifications

page 19

7 Specifications

page 20

8 Service

page 21

9 Warranty

UNITED STATES & CANADA

page 22

9 Warranty