Crown ComTech DriveCore User Manual

CT 475

CT 4150

CT 875

CT 8150

ComTech DriveCore 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 situa tion 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: Com-Tech, BCA, Crown, Crown Audio, Amcron and Multi-Mode are registered trademarks of Crown International. IQwic, PIP and PIP2 are trademarks of Crown International. Other trademarks are the property of their respective owners.

Some models may be exported under the name Amcron.

143368-1

4/11

CT 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 reg isters, 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,

par ticularly at plugs, convenience receptacles, and the point where they exit from the apparatus.

11. Only use attachments/accessories speciﬁed by the manufac-

turer.

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 nor mally, or has been dropped.

15. Use the mains plug to disconnect the apparatus from the

mains.

16. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC

SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.

17. DO NOT EXPOSE THIS EQUIPMENT TO DRIPPING OR

SPASHING AND ENSURE THAT NO OBJECTS FILLED WITH LIQUIDS, SUCH AS VASES, ARE PLACED ON THE EQUIPMENT.

18. THE MAINS PLUG OF THE POWER SUPPLY CORD SHALL

REMAIN READILY OPERABLE.

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’ALIMENTATION DE SON RÉCEPTACLE. LA PRISE D’ALIMEN TATION RESTERA AISÉMENT FONCTIONNELLE.

PARA DESCONECTAR COMPLETAMENTE EL EQUIPO DEL SUMINSTRO ELECTRICO, DESCONECTE EL CABLE DE ALIMENTACION 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 mainte nance.

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

CT Series ampliﬁers require Class 2 output wiring. Les ampliﬁcateurs de série de CT exigent des câbles de sortie de classe 2. CT-Reihe-Verstärker verlangen Klasse die 2 Produktionsverdrah tung. Los ampliﬁcadores de la Serie CT requieren de un cableado de sal ida Clase 2.

MAGNETIC FIELD

CAUTION! Do not locate sensitive high-gain equipment such as preampliﬁers 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 complicance could void the user’s authority to operate the euqipment.

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.

DECLARATION of CONFORMITY

ISSUED BY: Harman International 1718 W. Mishawaka Road Elkhart, Indiana 46517 U.S.A.

European Representative’s Name and Address:

David Budge 10 Harvest Close Yateley GU46 6YS United Kingdom

Equipment Type: Power Ampliﬁers Family Name: CT series Model Names: CT8150, CT875, CT4150, CT475

EMC Standards:

EN 55103-1:1997 Electromagnetic Compatibility – Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 1: Emissions EN 55103-1:1997 Magnetic Field Emissions-Annex A @ 10 cm and 1 M EN 61000-3-2:2006 & Amd 1: 2008 & AMd 2 : 2009 Limits for Harmonic Current Emissions (equipment input current ≤16A per phase) EN 61000-3-3:1998 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current ≤16A EN 55022:2006 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated, Class B Limits; Conducted, Class B EN 55103-2:1997 Electromagnetic Compatibility – Product Family Standard for Audio, Video, Audio-Visual and Entertainment Lighting Control Apparatus for Professional Use, Part 2: Immunity EN 61000-4-2:2009 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge) EN 61000-4-3:2006 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, Criteria A) EN 61000-4-4:2007 Electrical Fast Transient/Burst Immunity (Criteria B) EN 61000-4-5:2006 Surge Immunity (Criteria B) EN 61000-4-6:2009 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A) EN 61000-4-11:2001 Voltage Dips, Short Interruptions and Voltage Variation

Safety Standard:

IEC 60065: 2001: 7Ed & Amd 1: 2005 Safety Requirements - Audio Video and Similar Electronic Apparatus

I certify that the product identiﬁed above conforms to the requirements of the EMC Council Directive 2004/108/EC and the Low Voltage Directive 2006/95/EC.

Signed

Scott Potosky Title: Director of Engineering

Date of Issue: March 16, 2011

page 2 page 3

Operation Manual

Due to line current harmonics, we recommend that you contact your supply authority before connection.

Table of Contents

CT Power Ampliﬁers

Important Safety Instructions ...................................... 2

Declaration of Conformity ........................................... 3

1 Welcome .........................................5

1.1 Features ........................................................... 5

2 How to Use This Manual ........................ 5

3 Features ........................................... 5

4 Setup .............................................. 6

4.1 Unpack Your Ampliﬁer ......................................6

4.2 Install Your Ampliﬁer ........................................6

4.3 Ensure Proper Cooling ..................................... 6

4.4 Choose Input Wire and Connectors .................. 7

4.5 Choose Output Wire and Connectors ...............7

4.6 Wire Your System .............................................8

4.7 Connect to AC Mains ....................................... 8

4.8 Startup Procedure ............................................ 9

5 Precautions ......................................9

6 Front Panel ....................................... 10

7 Back Panel ........................................ 11

8 Amp Conﬁguration ............................... 12

8.1. 70Hz HPF (High Pass Filter) ............................. 12

8.2 Limiter ............................................................. 12

9 Operating Modes ................................. 12

9.1 Normal .............................................................. 12

9.2 Green Power ..................................................... 12

9.3 Deep Sleep .......................................................12

10 Auxiliary Ports .................................13

9.1 Deep Sleep .......................................................13

9.2 Amp Status ....................................................... 13

11 Input Routing ................................... 13

13 Advanced Features ............................14

13.1 Protection Systems ......................................... 14

13.1.1 Thermal Indicator .................................... 14

13.1.2 Fault .......................................................14

13.1.3 High-Pass Filters .................................... 14

13.1.4 AC Under/Over Voltage Protection ..........14

13.1.5 Circuit Breaker ........................................ 14

13.1.6 Convection-cooled Chassis .................... 14

13.1.7 Auto-Standby .......................................... 14

13.2 Features .......................................................... 14

13.2.1 Switching Power Supply ........................14

13.2.2 Power Mode ............................................14

13.2.3 Adaptive Voltage Rail ..............................14

13.2.4 DriveCore Power Stage ........................... 14

14 Accessories .....................................14

14.1 XFMR 4/8 .................................................. 14

14.2. Rack Support/Ears .................................... 14

15 Troubleshooting ................................15

15.1 Power Indicator ............................................... 15

15.2 Fault Indicator ................................................. 15

15.3 Thermal Indicator ............................................ 15

15.4 Clip Indicator .................................................. 15

15.5 Signal Indicator ..............................................15

15.6 Ready Indicator ............................................... 15

16 Speciﬁcations ................................... 16

17 AC Power Draw and Thermal Dissipation ... 17

18 Service ........................................... 21

19 Warranty ......................................... 22

Product Registration Form ........................................... 25

Factory Service Information Form ............................... 27

1 Welcome

Crown® ComTech DriveCore™ ampliﬁers provide state-of-the-art technology f or installed sound applica tions. The ComTech ampliﬁers provide noiseless o peration an d small footprint with excellent qu ality and performance.

ComTech DriveCore ampliﬁers offer:

1.1 Features

Audiophile Sound

• A signal-to-noise ratio of better than 110dB

• Total harmonic distortion below 0.05% across the full audio bandwidth

• Greater than 70dB crosstalk

• Frequency response of ±0.5dB

Size Advantage

• Up to 8 channels in a single rack-space

• Weight of only 10 pounds (4.54 Kg)

Power Efﬁciency

• Over 90% efﬁcient in the DriveCore ampliﬁer stage

• Power consumption of less than 1W when not in use (In Deep Sleep)

• Green Mode delivers power when needed. Ampliﬁer efﬁcency increases

by up to 10% when compared to typical class D ampliﬁers

Typical applications for ComTech DriveCore ampliﬁers include boardrooms, video and teleconferencing, VIP suites in stadiums and arenas, and upscale restaurants and retail outlets.

2 How to Use This Manual

This manual provides you with the necessary information to safely and correctly set up 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 system retailer).

3 Features

• 4 channel or 8 channel (4 inputs with 4 outputs or 8 inputs with 8 outputs)

• Single rack space

• Balanced 3-pin Barrier block-type/line inputs

• 4-pin Phoenix-type speaker outputs

• Flexible input routing

• Multiple Power Conﬁguration (Auto-Standby,

Deep Sleep, and Green Mode)

• Auxiliary port for amp status and power saving mode (Deep Sleep)

• Circuit breaker protection with reset switch

• Convection-cooled chassis (no fan)

• Three-year, no-fault, fully transferable

warranty that completely protects your investment and guarantees its speciﬁcations

• Can be used in mass notiﬁcation and EN 54 systems

• Patented technology including DriveCore

• Fault Reporting through Aux Port

• Adaptive Rail Technology for power

on demand.

• Complies with Green Edge by Harman

page 4 page 5

Operation Manual

CT Power Ampliﬁers

4 Setup

4.1 Unpack Your Ampliﬁer

Please unpack and inspect your ampliﬁer for any damage that may have occurred during transit. If damage is found, notify the transpor tation company immediately. Only you can ini tiate 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

• Flathead screwdriver

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.

4.2 Install Your Ampliﬁer

CAUTION: Before you begin, make sure your ampliﬁer is disconnected from the power source and that all level controls (see section 7.6) are set to 0.

The ampliﬁer is 1.75” tall by 15.19” deep and 19” wide (see ﬁgure 4.2.1).

Mount the unit in a standard 19-inch (48.3-cm) equipment rack (EIA RS-310B). You can also place a single amp on a solid, stable surface or stack multiple amps.

NOTE: When transporting, ampliﬁers should be supported at both front and back.

4.3 Ensure Proper Cooling

When using an equipment rack, mount units directly on top of each other. Close any open spaces in the rack with blank panels. DO NOT block front, top 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. While the ampliﬁer is convection cooled and does not require a fan, it is critical that the air vents are not covered.

4 Setup

4.4 Choose Input Wire and Connectors

Crown recommends using pre-built or professionally wired balanced line (twoconductor plus shield). Balanced wiring provides better rejection of unwanted noise and hum but unbalanced line may also be used. For more information, refer to the Crown Ampliﬁer Application Guide, available online at www. crownaudio.com.

Use 3-pin Phoenix-type cable ends at the amp input connectors.

Figure 4.4.1 shows connector pin assignments for balanced wiring and ﬁgure 4.4.2 shows connector pin assignments for unbalanced wiring.

NOTE: Custom wiring should only be performed by qualiﬁed personnel. Class 2 wiring is required.

4.5 Choose Output Wire and Con nectors

Crown recommends using professionally constructed, high quality, two-conductor, heavy gauge speaker wire and connectors. Use 2-pin Phoenix-type connectors (Included with the amp).

Suggested below are guidelines to select the appropriate size of wire based on the distance from ampliﬁer to speaker. Check with local code as this may vary.

Distance Wire Size

up to 25 ft. (7.6m) 16 AWG 26-40 ft. (7.9-12.2m) 14 AWG

CAUTION: Never use shielded cable for output wiring.

CAUTION: Never connect the speaker return to the chassis of the ampliﬁer, or damage to the ampliﬁer may result.

CAUTION: Output of ampliﬁer channels cannot be bridged. This may damage the ampliﬁer.

Figure 4.4.1

Figure 4.2.1 CT Series Dimensions

page 6 page 7

Operation Manual

Figure 4.4.2

CT Power Ampliﬁers

4 Setup

4.6 Wire Your System

Before you wire your system, you must be familiar with the capabilities of the input routing.

The DriveCore ampliﬁer can be conﬁgured in two ways:

1. The input for a channel goes out the same channel. This option is the standard conﬁguration.

DRIVECORE AMPLIFIER

CHANNEL 1

HANNEL 2

HANNEL 3

HANNEL 4

HANNEL 1

HANNEL 2

HANNEL 3

HANNEL 4

Figure 4.6.1 Four channels with no input routing

DRIVECORE AMPLIFIER

CHANNEL 1

HANNEL 2

HANNEL 3

HANNEL 4

CHANNEL 5

HANNEL 6

HANNEL 7

HANNEL 8

HANNEL 1

HANNEL 2

HANNEL 3

HANNEL 4

HANNEL 5

HANNEL 6

HANNEL 7

HANNEL 8

Figure 4.6.2 Eight channels with no input routing

2. The input for a channel can be routed to the next channel, overriding the wired input signal for that channel. This method simpliﬁes input wiring and minimizes use of y-cables.

DRIVECORE AMPLIFIER

CHANNEL 1

HANNEL 2

HANNEL 3

HANNEL 4

HANNEL 1

HANNEL 2

HANNEL 3

HANNEL 4

Figure 4.6.3 Two channel to four channel routing

DRIVECORE AMPLIFIER

CHANNEL 1

HANNEL 2

HANNEL 3

HANNEL 4

HANNEL 1

HANNEL 2

HANNEL 3

HANNEL 4

Figure 4.6.4 One channel to four channel routing

DRIVECORE AMPLIFIER

CHANNEL 1

HANNEL 2

HANNEL 3

HANNEL 4

CHANNEL 5

HANNEL 6

HANNEL 7

HANNEL 8

HANNEL 1

HANNEL 2

HANNEL 3

HANNEL 4

HANNEL 5

HANNEL 6

HANNEL 7

HANNEL 8

Figure 4.6.5 Four channel to eight channel routing

Input routing is conﬁgured using the dip switches on the back of the ampliﬁer. See Section 11 Input Routing

for information on conﬁguring switches.

4.7 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 cord set 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. If the AC line voltage varies out of an acceptable range, the ampliﬁer’s power supply turns off and the blue Power LED ﬂashes. The ampliﬁer will turn back on when the AC line voltage returns to safe operating levels.

Figure 4.7.1 provides voltage limits for all ampliﬁer AC voltage conﬁgurations. Also, the ampliﬁer must be run within the speciﬁed mains 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.

Model Under-Voltage Limit Over-Voltage Limit

All Models 90 VAC 264 VAC

Figure 4.7.1 AC Under-Voltage and Over-Voltage Limits for Various Ampliﬁer Models

4 Setup

4.8 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 (see Section 7.6).

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.

If you ever need to make any wiring or installation

changes, don’t forget to turn off the ampliﬁer and discon nect the power cord.

For help with determining your system’s optimum gain structure (signal levels) please refer to the Crown Ampli ﬁer Application Guide, available online at www.crownaudio.com.

5 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 operat ing difﬁculties. For information on wiring and conﬁg uration, 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. 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 protec tion, such a conﬁguration may result in premature clipping and speaker damage.

9. Output of ampliﬁer cannot be bridged or multiple channels cannot be connected together.

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

Note: ComTech DriveCore ampliﬁers can NOT be bridged.

page 8 page 9

Operation Manual

CT Power Ampliﬁers

6 Front Panel

1. Fault Indicator

• Red LED

• One per output channel

• Flashes when the amplier output channel has

stopped operating. Usually this means that the ampliﬁer must be serviced. (See Section 15 Troubleshooting)

2. Thermal Indicator

• Red LED

• One per output channel

• If exceeds Thermal Limits, output channels will

shut down in pairs until thermal levels are within tolerant ranges.

• Illuminates when the channel approaches

temperature constraints or is about to shut down. Audible distortion may be heard.

• Unit stops amplication for each channel until

temperature returns to acceptable level. Once the amp cools off enough, led turns off, audio starts again.

12 34

3. Clip Indicator

• Red LED

• One per output channel

• Illuminates when the channel is at the threshold

of audible distortion (See Section 15 Troubleshooting – reduce input level)

• When the limiter is turned on the Clip Indicator

will illuminate when the limiter is protecting the ampliﬁer from input overload.

4. Signal Indicator

• Green LED

• One per input channel

• Illuminates when the input signal exceeds

-24dBu

5. Ready Indicator

• Green LED

• One per input channel

• Illuminates when the channel is ready for signal

• Illuminates when the channel is initialized and

ready to produce audio output.

• Ready indicator will ash when the channel

is in standby.

• Ready Indictor will not illuminate or ash when

the ampliﬁer is in deep sleep.

6. Power Indicator

• Blue LED

• Indicates AC power has been applied and is

within the safe operating range of the power supply. The LED will ﬂash when the AC line voltage is above or below the nominal rated value. The LED will also ﬂash when the ampliﬁer is in Deep Sleep mode AND the power button has been pushed.

789

7. Data Indicator

• Yellow LED (not functional in analog version)

• Indicates network activity

• Reserved for future releases (Lite and DSP)

8. Power Button

• On/off push button

9. Cooling Vent

• Allows for air ow and cooling of the amplier

7 Back Panel

1234 56 75 6

1. AC Power Inlet

• Standard IEC type 320 inlet for detachable

connector

• 100-240V

2. Reset Button/Breaker

• Push button switch

• Resets the circuit breaker that protects the power

supply

• A circuit breaker located near the IEC power inlet

protects the ampliﬁer from excessive AC current draw.

3. Auxiliary Connector

• 3-pin Phoenix type connector

• Allows for amp to be placed in DEEP SLEEP

mode and monitoring of AMP STATUS (see Section 10.2)

4. Amp Conﬁguration DIP Switches (see Amp

Status/Conﬁguration in section 10.2)

• Switches 1-5 turn specic settings on and off:

-70 Hz HPF (High Pass Filter

- see Section 8.1)

-Auto-Standby

-Amp Status

-Green Power (See Section 9.2)

-Limiter

• Switches 6-12 sends input channel audio signal

to corresponding output channel and adjacent output channel. In four channel model, switch 6-9 are non-functional, (see section 11)

5. Amp Input Connectors

• 3-pin block connector can be used per input

• High impedance balanced

6. Channel Level Controls

• One 21-position detented rotary attenuator per

channel

• Attenuation range from -100dB to 0dB

7. Output Speaker Connector

• 4-pin Barrier block type per two channels

(2-Pin or 8-Pin Phoenix can be used)

page 10 page 11

Operation Manual

CT Power Ampliﬁers

8 Amp Conﬁguration 9 Operating Modes

8.1 70Hz HPF (High Pass Filter)

On the back panel, one 2-position high-pass ﬁlter switch will only allow signals above 70Hz to be ampliﬁed. This is to prevent transformer saturation. The HPF, when turned on, is activated for all channels. The ﬁlter is a 2nd order 12 dB/occ t ﬁlter.

8.2 Limiter

The limiter reduces ampliﬁer gain to allow over drive without harsh clipping at output.

When Amp Conﬁguration Switch #5 is set to on (pushed up), the ampliﬁer will utilize the limiter feature.

DriveCore Ampliﬁers can work in a variety of power modes.

9.1 Normal

The ampliﬁer automaticaly operates full output power.

9.2 Green Power

Green mode utilizes Crown’s adaptive rail technology for higher efﬁciency or power on demand. When Amp Conﬁguration DIP switch #4 is set to on, the ampliﬁer will operate in green mode.

For low input signal levels (less than –40dBu) the ampliﬁer will operate with minimum power.

The ampliﬁer will increase to full power if either of the following occurs:

1 - The input signal goes above -40dBu 2 - There is a single clip event from any of the channels Likewise, if the ampliﬁer is operating with full power,

the ampliﬁer will decrease the operating rails to minimum power if the input signal drops below -40dBu.

Through the use of Green Power, the efﬁciency of the ampliﬁer dramatically increases for lower audio signal reproduction. The adaptive rail technology used in the CT ampliﬁers can increase the efﬁciency of the ampliﬁer by up to 10% with low signal levels.

9.3 Deep Sleep

See Section 10.1

Is green mode DIP switch on?

Y E S

Lower voltage rails

Is there a clip

event?

Y E S

Increase rails to Full Power

Figure 9.2.1 How Green Power DIP switches work

Full Power

Minimum Power

10 Auxiliary Port 11 Input Routing

10.1 Deep Sleep

In deep sleep mode, the amp consumes less than 1 watt of power. It is activated via the AUX port with a ground closure.

To bring the ampliﬁer out of deep sleep, remove the ground closure via the AUX port.

10.2 Amp Status

The Ampliﬁer Status is designed to work with life safety or supervisory monitoring and control systems, where notiﬁcation of an ampliﬁer fault is necessary. The Ampliﬁer Status is producing a signal (Heartbeat or tone) when the ampliﬁer is operating within standard working parameters. If the ampliﬁer enters a fault or thermal condition, the Ampliﬁer Status signal will terminate. This feature in the ComTech ampliﬁer is always on. The Ampliﬁer

Status is located on the Auxiliary Port, opposite the DEEP SLEEP function. The conﬁguration of the Amp

Status signal is possible through DIP Switch #3:

• ON – the microcontroller will send a 1 Hz

pulse to the “AMP STATUS” AUX port line

• OFF – the microcontroller will send a logic high level to the “AMP STATUS” AUX port line

The voltage output of the AuxPort is 5VDC at 50 milliamps. This TTL or similar signal can then be connected to an interface to indicate the status to a supervisory control system.

Amp status can be used in a variety of life safety applications, such as EN54, IEC60849 among others.

This ampliﬁer can route a single channel to the next numbered channel.

In CT 475 and CT 4150, DIP switches 6-9 are non-functional.

When a DIP switch is set to “on” for a speciﬁc channel, it sends the signal to its own output AND becomes the input for the next numbered channel, overriding the wired input for that channel.

Figure 11.1

Channel 1 intput sent to all channel outputs, overriding channel inputs for channels 2,3, and 4

Figure 11.3

Channel 1 input sent to channels 1, 2, and 3 Channel 4 input sent to channels 4, 5, and 6 Channel 7 input sent to channels 7 and 8

Figure 11.2

Four input signals sent to four outputs

page 12 page 13

Operation Manual

CT Power Ampliﬁers

13 Advanced Features

13.1 Protection Systems

Your Crown ampliﬁer provides extensive protection and diagnostic capabilities, including thermal level control, fault indicators, high-pass ﬁltering, DC protect, AC under/over voltage protection, inrush limiting, and a convection-cooled chassis.

13.1.1 Thermal Indicator

If the ampliﬁer becomes too hot for safe operation, the channel that is generating too much heat will be shut down until the temperature is reduced.

13.1.2 Fault

The ampliﬁer will enter a Fault state if the ampliﬁer senses an unsafe condition. This protection is for both internal and external faults. It is critical to check all wiring to and from the ampliﬁer to ensure the fault is not caused by external conditions. Once wiring has been veriﬁed to be correct, and the fault condition persists, see Section 17 Service for Servicing information.

13.1.3 High-Pass Filters

HPF’s are traditionally used in Hi-Z applications. The Com-Tech DriveCore is a low Z ampliﬁer but can be used in conjunction with the XFMR 4/8 transformer box for Hi-Z applications. If the ampliﬁer is to be used in a Hi-Z application, then it is very important to use the HPF to prevent transformer saturation.

13.1.4 AC Under/Over Voltage Protection

If the AC line voltage drops below 25% or rises above 15% of the nominal operating voltage of the ampliﬁer, the ampliﬁer’s power supply turns off and the blue Power LED ﬂashes. The ampli ﬁer will turn back on when the AC line voltage returns to safe operating levels (within ±10%).

13.1.5 Circuit Breaker

A circuit breaker located near the IEC power inlet protects the ampliﬁer from excessive AC current draw.

13.1.6 Convection-cooled Chassis

The DriveCore ampliﬁers require no fans for cooling, providing quiet operation and optimum efﬁciency.

13.1.7 Auto-Standby

If ampliﬁer does not see input signals for a period of 30 minutes, the ampliﬁer will go into standby mode. The ampliﬁer will come out of standby mode once an input signal is present. This feature is activated via DIP switch #2 on the back of the ampliﬁer. The ampliﬁer will be conﬁgured with Auto-Standby turn-on from the factory. When the ampliﬁer is in Standby, the Ready Indicator on the front panel Display will ﬂash.

13.2 Features

13.2.1 Switching Power Supply

Crown’s Switching Power Supply minimizes the ampliﬁer’s weight. Typical non-switching power supplies require large, heavy transformers in order to produce the required power at the output stage. These transformers must be large to operate at 50 to 60 Hz (standard AC supplied by the power company).

By contrast, switching power supplies can operate with a much smaller (and lighter) transformer because they ﬁrst convert the AC up to a much higher frequency, thereby reducing waste. The power supply is voltage-speciﬁc, allowing use in regions using 100V or 240V.

13.2.2 Power Mode

Deep sleep and green mode allow the ampliﬁer to operate at all times with the lowest possible power level.

13.2.3 Adaptive Rail Technology (ART)

Crown has developed a voltage rail technology that delivers power on demand. ART is at the center of CT DriveCore’s Green mode that provides up to an additional 10% of efﬁciency. Through ART, the CT DriveCore is always operating at maximum efﬁciency.

13.2.4 DriveCore Power Stage

Crown has worked with Texas Instruments to develop an audio ampliﬁer on a micro-chip. The result is DriveCore chipset that introduces audiophile quality for an installation amp:

-Greater than 90% Efﬁciency

-118dB Signal to Noise

-THD less than .05% in midband frequencies

14 Accessories

14.1 XFMR 4/8

The ComTech DriveCore ampliﬁer is only capable of low Z applications. It is necessary to use an outboard transformer for Hi-Z applications. Crown highly recommends the use of the XFMR 4/8 transformer box. This transformer box is designed to mate with the top of the ComTech DriveCore Ampliﬁers. See XFMR data sheet for wiring diagram.

14.2 Rack Support Ears

The ComTech DriveCore ampliﬁer requires front and back rack support for proper mounting. These have been provided with the ampliﬁer.

15 Troubleshooting

15.1 Power Indicator

OFF

FLASHING

15.2 Fault Indicator

FLASHING

15.3 Thermal Indicator

CONDITION: Power indicator is OFF.

POSSIBLE REASON

• The amplier has lost AC power.

• The amplier’s Power switch is off.

• The amplier is not plugged into the power receptacle.

• The amplier output level is so high that the power supply

circuit breaker has tripped. Allow the unit to cool. Turn down the Level controls. Press the Reset Switch on the back panel.

CONDITION: Power indicator is FLASHING.

POSSIBLE REASON

• The AC line voltage has dropped below +15/-25 or has risen above +15/-25% of the nomi nal line voltage of the

power supply.

• Amp is in Deep Sleep Mode.

CONDITION: Fault indicator is FLASHING.

POSSIBLE REASON

• The amplier channel has stopped operat ing. Refer the

unit to an authorized Crown Service Center.

• Check for shorted outputs

CONDITION: Thermal indicator is ON.

POSSIBLE REASON

• The amplier is becoming too hot for safe operation.

Allow ampliﬁer to cool. Check for loads less than 4 ohms, and for excessive input levels. Check for proper ventilation and proper mode-switch set ting.

FLASHING

CONDITION: Thermal indicator is ﬂashing.

POSSIBLE REASON

• Amplier has become too hot to operate. Allow amplier

to cool. Ampliﬁer will not pass audio if ampliﬁer has become too hot

15.4 Clip Indicator

ON or FLASHING

CONDITION: Clip indicator is ON or FLASHING.

POSSIBLE REASON

• input level or output level is distorting

15.5 Signal Indicator

OFF

CONDITION: Signal indicator is ﬂashing even though audio is applied, and the channel is ready.

POSSIBLE REASON

• Input signal level is very low

• Level controls are turned down

15.6 Ready Indicator

OFF

CONDITION: Ready indicator is OFF.

POSSIBLE REASON

• Amplier may be in deep sleep

FLASHING

CONDITION: Ready Indicator ﬂashing.

POSSIBLE REASON

• Amplier is in Standby mode. Flashing will stop once

there is an input signal.

page 14 page 15

Operation Manual

CT Power Ampliﬁers

16 Speciﬁcations

Performance CT475 CT4150 CT875 CT8150

Channels 4 4 8 8 Sensitivity 1.4V 1.4V 1.4V 1.4V

Rated Power Output

Signal to Noise Ratio (below rated power 20Hz to 20kHz, A-Weighted) 110 dB 110 dB 110 dB 110 dB Total Harmonic Distortion (THD) (full rated power, 1kHz) < 0.05% < 0.05% < 0.05% < 0.05% Intermodulation Distortion (from 0dB down to -30dB) < 0.05% < 0.05% < 0.05% < 0.05% Frequency Response (at 1W into 4/8 ohms) ± 0.5 dB ± 0.5 dB ± 0.5 dB ± 0.5 dB Common Mode Rejection (20Hz to 1kHz) > 70 dB > 70 dB > 70 dB > 70 dB Load Ranges 2-8 Ohms 2-8 Ohms 2-8 Ohms 2-8 Ohms

General CT475 CT4150 CT875 CT8150

Dimension (H x W x D) 1.75” x 19” x 15.19” 1.75” x 19” x 15.19” 1.75” x 19” x 15.19” 1.75” x 19” x 15.19” Net Weight 10 lbs 10 lbs 10 lbs 10 lbs Net Shipping Weight 15 lbs 15 lbs 15 lbs 15 lbs

*26dBgain **Ampliﬁer is stable for 20hm loads

75W per channel

into 8/4 ohms

* * * *

125W per channel

into 8/4 ohms

75W per channel

into 8/4 ohms

125W per channel

into 8/4 ohms

17 AC Power Draw and Thermal Dissipation

AC Power Draw and Thermal Disspation:

Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120/240 VAC mains. Data based on all channels driven at 8 Ohms.

ComTech DriveCore 475

120VAC

Load Watts in

Idle (Deep Sleep) - 0.9 <0.1 1.00 0.90 1 3.41 0.86

Idle (Auto Standby) - 11 0.30 11.00 10.00 0.22 15.8 53.88 13.57

Idle (Awake) - 15 0.40 15.00 13.20 0.25 25 85.25 21.48

Idle (Green Power) - 9.7 0.25 - 9 0.20 - - -

1/8th Power Pink

Noise

1/3rd Power Pink

Noise

1/8th Power Sine

1/3rd Power Sine

8 64 38 1.25 30 27 62 38 0.80 47 25 90.37 22.76

6 65 38 1.33 28 27 64 38 0.84 45 27 92.07 23.19

4 70 38 1.35 28 33 66 38 0.90 42 29 110.83 27.92

8 142 100 2.65 38 42 140 100 1.60 63 40 143.22 36.08

6 147 100 2.70 37 47 145 100 1.70 59 45 160.27 40.37

4 150 100 2.75 36 50 149 100 1.80 56 49 170.50 42.95

8 62 38 1.22 31 24 60 38 0.73 51 23 83.27 20.98

6 63 38 1.23 30 25 61 38 0.74 51 24 85.59 21.56

4 65 38 1.27 30 27 63 38 0.76 49 26 92.41 23.28

8 138 100 2.52 40 38 136 100 1.50 67 36 130.26 32.81

6 141 100 2.56 39 41 138 100 1.52 66 38 138.62 34.92

4 146 100 2.64 38 46 144 100 1.58 63 44 155.84 39.26

Watts

out

Line

Current

Watts Out

Per 1A Line

Current

Watts

Dissipated

Watts in Watts out

Line

Current

240VAC

Watts Out

Per 1A Line

Current

Watts

Dissipated

Thermal Dispation

btu/hr kcal/hr

page 16 page 17

Operation Manual

CT Power Ampliﬁers

17 AC Power Draw and Thermal Dissipation

AC Power Draw and Thermal Disspation:

Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120/240 VAC mains. Data based on all channels driven at 8 Ohms.

ComTech DriveCore 4150

120VAC

Load Watts in

Idle (Deep Sleep) - 0.9 <0.1 1.00 0.90 <0.1 1 3.41 0.86

Idle (Auto Standby) - 11.9 0.35 11.90 10.90 0.28 15.8 53.88 13.57

Idle (Awake) - 17.5 0.60 17.50 16.50 0.37 25 85.25 21.48

Idle (Green Power - 9.7 0.25 - 9 0.20 - - -

1/8th Power Pink

Noise

1/3rd Power Pink

Noise

1/8th Power Sine

1/3rd Power Sine

8 98 63 1.90 33 36 96 63 1.20 53 33 121.06 30.49

6 102 63 2.10 30 40 120 63 1.25 50 39 134.70 33.93

4 115 63 2.20 28 53 105 63 1.32 48 42 179.03 45.10

8 225 167 3.95 42 58 230 167 2.45 68 63 214.83 54.12

6 230 167 4.00 42 63 244 167 2.55 65 77 262.57 66.14

4 240 167 4.15 40 73 248 167 2.60 64 81 276.21 69.58

8 95 63 1.80 35 32 94 63 1.08 58 31 109.12 27.49

6 96 63 1.82 34 34 95 63 1.09 57 33 114.24 28.78

4 100 63 1.89 33 38 99 63 1.13 55 37 127.88 32.21

8 222 167 3.89 43 55 221 167 2.34 71 54 188.23 47.42

6 227 167 3.98 42 60 225 167 2.37 70 58 205.96 51.88

4 237 167 4.12 40 70 235 167 2.48 67 68 238.02 59.96

Watts

out

Line

Current

Watts Out

Per 1A Line

Current

Watts

Dissipated

Watts in Watts out

Line

Current

240VAC

Watts Out

Per 1A Line

Current

Watts

Dissipated

Thermal Dispation

btu/hr kcal/hr

17 AC Power Draw and Thermal Dissipation

AC Power Draw and Thermal Disspation:

Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120/240 VAC mains. Data based on all channels driven at 8 Ohms.

ComTech DriveCore 875

120VAC

Load Watts in

Idle (Deep Sleep) - 0.9 <0.1 1.00 0.90 <0.1 1 3.41 0.86

Idle (Auto Standby) - 17 0.40 17.00 15.50 0.25 15.8 57.97 14.60

Idle (Awake) - 23 0.50 23.00 21.00 0.32 25 85.25 21.48

Idle (Green Power) - 14.5 0.40 - 14 0.30 - - -

1/8th Power Pink

Noise

1/3rd Power Pink

Noise

1/8th Power Sine

1/3rd Power Sine

8 117 75 2.40 31 42 114 75 1.32 57 39 143.22 36.08

6 121 75 2.50 30 46 117 75 1.40 54 42 156.86 39.51

4 126 75 2.60 29 51 122 75 1.60 47 47 173.91 43.81

8 277 200 4.66 43 77 270 200 2.85 70 70 262.57 66.14

6 284 200 4.90 41 84 275 200 2.90 69 75 286.44 72.16

4 292 200 5.30 38 92 283 200 3.00 67 83 313.72 79.03

8 115 75 2.11 35 40 113 75 1.27 59 38 136.40 34.36

6 116 75 2.14 35 41 114 75 1.28 58 39 139.81 35.22

4 119 75 2.20 34 44 118 75 1.32 57 43 150.04 37.80

8 269 200 4.60 43 69 266 200 2.77 72 66 236.31 59.53

6 273 200 4.66 43 73 269 200 2.80 71 69 248.93 62.71

4 283 200 4.82 42 84 279 200 2.90 69 79 285.08 71.81

Watts

out

Line

Current

Watts Out

Per 1A Line

Current

Watts

Dissipated

Watts in Watts out

Line

Current

240VAC

Watts Out

Per 1A Line

Current

Watts

Dissipated

Thermal Dispation

btu/hr kcal/hr

page 18 page 19

Operation Manual

CT Power Ampliﬁers

17 AC Power Draw and Thermal Dissipation

AC Power Draw and Thermal Disspation:

Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz. Typical line impedance used. Measurements made with 120/240 VAC mains. Data based on all channels driven at 8 Ohms.

ComTech DriveCore 8150

120VAC

Load Watts in

Watts

out

Line

Current

Watts Out

Per 1A Line

Current

Watts

Dissipated

Watts in Watts out

Idle (Deep Sleep) - 0.9 <0.1 1.00 1.00 <0.1 1 3.41 0.86

Idle (Auto Standby) - 17 0.35 17.00 15.80 0.28 15.8 57.97 14.60

Idle (Awake) - 26.5 0.60 26.50 25.00 0.37 25 90.37 22.76

Idle (Green Power) - 14.5 0.40 - 14 0.30 - - -

8 179 122 3.40 36 57 185 125 2.10 60 60 204.60 51.54

1/8th Power Pink

Noise

6 221 155 4.00 39 66 210 150 2.10 71 60 225.06 56.69

4 207 131 3.50 37 76 201 125 2.10 60 76 259.16 65.28

8 438 325 7.60 43 113 445 330 4.30 77 115 392.15 98.79

1/3rd Power Pink

Noise

6 550 400 6.50 62 150 525 321 4.50 71 204 695.64 175.24

4 525 349 5.70 61 176 510 309 4.40 70 201 685.41 172.66

8 183 125 3.37 37 58 180 125 1.93 65 55 197.78 49.82

1/8th Power Sine

6 221 152 4.00 38 68 221 155 2.33 67 66 232.90 58.67

4 205 133 3.74 36 72 198 131 2.12 62 67 245.52 61.85

8 452 334 7.85 43 118 436 329 4.36 75 107 402.38 101.36

1/3rd Power Sine

6 570 413 9.93 42 157 558 413 5.56 74 145 535.37 134.86

4 507 349 8.79 40 158 495 350 4.93 71 145 538.78 135.72

Line

Current

240VAC

Watts Out

Per 1A Line

Current

Watts

Dissipated

Thermal Dispation

btu/hr kcal/hr

18 Service

Crown ampliﬁers are quality units that rarely require ser vicing. Before returning your unit for service, please con tact 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.

Warranty is only valid within the country in which the product is purchased.

17.1 International and Canada Service

Ser vice may be ob tained from a n authorize d service cen ter. (Contact your local Crown/Am cron repre sentati ve or our ofﬁc e for a list of authorize d service c enters.) To obt ain servic e, simply pres ent the bill of sale as proo f of purchase along wi th the defective unit to an a uthorized s ervice center. They will h andle the ne cessar y paperwork an d repair. Remember to transpor t your unit in the or iginal factory pa ck.

17.2 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.

17.2.1 Service at a US Service Center

This method usually saves the most time and effort. Sim ply 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.

Remem ber 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.

17.2.2 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 ser viceable 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 send ing 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.

17.2.3 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.

17.2.4 Packing Instructions

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

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

2. Do not ship any accessories (manuals, cords, hard ware, 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 mini mum 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 war ranty.

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 foam-in-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.

17.2.5 Estimate Approval

Approval of estimate must be given within 30 days after being notiﬁed by Crown Audio Inc. Units still in the pos session of Crown after 30 days of the estimate will become the property of Crown Audio Inc.

17.2.6 Payment of Non-Warranty Repairs

Payment on out-of-waranty repairs must be received within 30 days of the repair date. Units unclaimed after 30 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 20 page 21

Operation Manual

CT Power Ampliﬁers

YEAR

CT Power Ampliﬁers

19 Warranty

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 War ranty.

Warranty is only valid within the country in which the product was purchased.

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 inten tional 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

18.1 UNITED STATES & CANADA

the actual purchase price, not including inter est, insurance, closing costs, and other ﬁnance charges less a reasonable depreciation on the product from the date of original purchase. War ranty work can only be performed at our autho rized 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 defec tive 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 for eign country and the port of entry in the United States including the return shipment, and all taxes, duties, and other customs fees for such for eign shipments.)

HOW TO OBTAIN WARRANTY SERVICE

You must notify us of your need for warranty ser vice 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 reason able 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 autho rized 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 War ranty 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. 10/10

19 Warranty

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 pur chase 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.

Warranty is only valid within the country in which the product is purchased.

1 Note: If your unit bears the name “Amcron,” please substitute it

for the name “Crown” in this warranty.

ITEMS EXCLUDED FROM THIS CROWNWARRANTY

18.2 WORLDWIDE EXCEPT USA & CANADA

WHAT THE WARRANTOR WILL DO

We will remedy any defect, regardless of the rea son for failure (except as excluded), by repair, replacement, or refund. We may not elect refund unless you agree, or unless we are unable to pro vide 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 inter est, insurance, closing costs, and other ﬁnance charges less a reasonable depreciation on the product from the date of original purchase. War ranty work can only be performed at our autho rized service centers. We will remedy the defect and ship the product from the service center within a reasonable time after receipt of the defec tive 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 cen ter are not satisfactory, notify our authorized ser vice 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. 10/10

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PRODUCT REGISTRATION

Crown Audio, Inc. 1718 W. Mishawaka Rd. Elkhart, IN 46517-9439 Phone: 574-294-8000 Fax: 574-294-8329 www.crownaudio.com

Online registration is also available at http://crownweb.crownintl.com/webregistration.

Warranty is only valid within the country in which the product is purchased.

When this form is used to register your product, it may be mailed or faxed.

Crown Audio, Inc. Fax: 574-294-8329 1718 W Mishawaka Rd Elkhart IN 46517

Please note that some information is required. Incomplete registrations will not be processed. * Indicates required information.

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OWNER’S INFORMATION - PLEASE PRINT

* First name: ______________________ Middle initial: _____ * Last name: ________________________________ Company: _________________________________________________________________________________ * Mailing address: ____________________________________________________________________________ * City: ____________________________* State: ___________________________* Zip Code: ________________ * Country: __________________________ E-mail address: ___________________________________________ * Phone # (include area code): ___________________________ Fax #: __________________________________

* MODEL * SERIAL # * PURCHASE DATE e.g. IT8000, CDi1000, PCC160 e.g. 8000000000 mo/day/yr ________________________________ ____________________ ______ /_____ /_____ ________________________________ ____________________ ______ /_____ /_____ ________________________________ ____________________ ______ /_____ /_____ ________________________________ ____________________ ______ /_____ /_____

Product purchased from: *(Business/Individual) ___________________________ Country: ________________________ Comments: ____________________________________________________________________________________ _____________________________________________________________________________________________ _____________________________________________________________________________________________

PRODUCT INFORMATION

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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: _________________________

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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: __________________________________________________________________________

__________________________________________________________________________

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Operation Manual

Crown ComTech DriveCore User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual