Crown COMTECH DRIVECORE CT 875 User Manual

ComTech DriveCore Operation Manual  
CT 475  
CT 4150  
CT 875  
CT 8150  
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  
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.  
© 2011 by Harman International®, Inc. 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000  
143368-1  
4/11  
CT Power Amplifiers  
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  
Operation Manual  
page 3  
Due to line current harmonics, we recommend that you contact your supply authority before connection.  
CT Power Amplifiers  
Table of Contents  
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  
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  
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  
10 Auxiliary Ports .................................13  
9.1 Deep Sleep .......................................................13  
9.2 Amp Status.......................................................13  
Product Registration Form...........................................25  
Factory Service Information Form ...............................27  
11 Input Routing ...................................13  
13 Advanced Features ............................14  
page 4  
Operation Manual  
CT Power Amplifiers  
3 Features  
1 Welcome  
Crown® ComTech DriveCore™ amplifiers provide state-of-the-art  
technology for installed sound applications. The ComTech amplifiers  
provide noiseless operation and small footprint with excellent quality and  
performance.  
2 How to Use This  
Manual  
4 channel or 8 channel (4 inputs with 4  
outputs or 8 inputs with 8 outputs)  
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).  
Single rack space  
Balanced 3-pin Barrier block-type/line inputs  
4-pin Phoenix-type speaker outputs  
Flexible input routing  
ComTech DriveCore amplifiers offer:  
1.1 Features  
Audiophile Sound  
A signal-to-noise ratio of better than 110dB  
Multiple Power Configuration (Auto-Standby,  
Deep Sleep, and Green Mode)  
Total harmonic distortion below 0.05% across the full audio bandwidth  
Greater than 70dB crosstalk  
Auxiliary port for amp status and power  
saving mode (Deep Sleep)  
Circuit breaker protection with reset switch  
Convection-cooled chassis (no fan)  
Frequency response of 0.5dB  
Size Advantage  
Up to 8 channels in a single rack-space  
Three-year, no-fault, fully transferable  
warranty that completely protects your  
investment and guarantees its specifications  
Weight of only 10 pounds (4.54 Kg)  
Can be used in mass notification and EN 54  
systems  
Power Efficiency  
Over 90% efficient in the DriveCore amplifier stage  
Patented technology including DriveCoreTM  
Power consumption of less than 1W when not in use (In Deep Sleep)  
Fault Reporting through Aux Port  
Green Mode delivers power when needed. Amplifier efficency increases  
by up to 10% when compared to typical class D amplifiers  
Adaptive Rail Technology for power  
on demand.  
Complies with Green Edge by Harman  
Typical applications for ComTech DriveCore amplifiers include boardrooms,  
video and teleconferencing, VIP suites in stadiums and arenas, and upscale  
restaurants and retail outlets.  
Operation Manual  
page 5  
CT Power Amplifiers  
4 Setup  
4.1 UnpackYour Amplifier  
4.2 InstallYour Amplifier  
4.3 Ensure Proper Cooling  
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.  
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.  
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 amplifier is 1.75” tall by 15.19” deep and  
19” wide (see figure 4.2.1).  
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.  
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.  
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.  
NOTE: When transporting, amplifiers should be  
supported at both front and back.  
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 Instruc-  
tions found at the beginning of this  
manual.  
Figure 4.2.1 CT Series Dimensions  
page 6  
Operation Manual  
CT Power Amplifiers  
4 Setup  
4.4 Choose InputWire  
and Connectors  
4.5 Choose OutputWire and  
Connectors  
Crown recommends using pre-built or  
professionally wired balanced line (two-  
conductor 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.  
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.  
Use 3-pin Phoenix-type cable ends at the amp  
input connectors.  
Distance  
Wire Size  
16 AWG  
Figure 4.4.1 shows connector pin assignments  
for balanced wiring and figure 4.4.2 shows  
connector pin assignments for unbalanced wiring.  
up to 25 ft. (7.6m)  
26-40 ft. (7.9-12.2m)  
14 AWG  
NOTE: Custom wiring should only be  
performed by qualified personnel. Class 2  
wiring is required.  
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 4.4.2  
Operation Manual  
page 7  
CT Power Amplifiers  
4 Setup  
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.  
4.6 WireYour System  
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.  
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.  
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.  
CHANNEL 1  
CHANNEL 2  
CHANNEL 3  
CHANNEL 4  
CHANNEL 1  
CHANNEL 2  
CHANNEL 3  
CHANNEL 4  
CHANNEL 1  
CHANNEL 2  
CHANNEL 3  
CHANNEL 4  
CHANNEL 1  
CHANNEL 2  
CHANNEL 3  
CHANNEL 4  
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 4.6.3 Two channel to four channel routing  
Figure 4.6.1 Four channels with no input routing  
CHANNEL 1  
CHANNEL 2  
CHANNEL 3  
CHANNEL 4  
CHANNEL 1  
CHANNEL 2  
CHANNEL 3  
CHANNEL 4  
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.  
CHANNEL 1  
CHANNEL 2  
CHANNEL 3  
CHANNEL 4  
CHANNEL 5  
CHANNEL 6  
CHANNEL 7  
CHANNEL 8  
CHANNEL 1  
CHANNEL 2  
CHANNEL 3  
CHANNEL 4  
CHANNEL 5  
CHANNEL 6  
CHANNEL 7  
CHANNEL 8  
Figure 4.6.4 One channel to four channel routing  
CHANNEL 1  
CHANNEL 2  
CHANNEL 3  
CHANNEL 4  
CHANNEL 5  
CHANNEL 6  
CHANNEL 7  
CHANNEL 8  
CHANNEL 1  
CHANNEL 2  
CHANNEL 3  
CHANNEL 4  
CHANNEL 5  
CHANNEL 6  
CHANNEL 7  
CHANNEL 8  
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  
Figure 4.6.2 Eight channels with no input routing  
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.  
Note: ComTech DriveCore amplifiers can NOT be  
bridged.  
page 8  
Operation Manual  
CT Power Amplifiers  
4 Setup  
5 Precautions  
Your amplifier is protected from internal and external  
faults, but you should still take the following  
4.8 Startup Procedure  
precautions for optimum performance and safety:  
Use the following procedure when first turning on your  
amplifier:  
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  
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.  
2. Use care when making connections, selecting  
signal sources and controlling the output level.  
The load you save may be your own!  
5. Turn up the Level controls on the amplifier until the  
desired loudness or power level is achieved.  
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.  
If you ever need to make any wiring or installation  
changes, don’t forget to turn off the amplifier and  
disconnect the power cord.  
4. Never connect the output to a power  
supply, battery or power main. Electrical  
shock may result.  
For help with determining your system’s optimum gain  
structure (signal levels) please refer to the Crown  
Amplifier Application Guide, available online at  
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.  
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.  
Operation Manual  
page 9  
CT Power Amplifiers  
6 Front Panel  
1 2  
5 4 3 9  
6 7 8  
1. Fault Indicator  
• Red LED  
3. Clip Indicator  
5. Ready Indicator  
7. Data Indicator  
• Red LED  
• One per output channel  
• Green LED  
• One per input channel  
• Yellow LED (not functional in analog version)  
• Indicates network activity  
• One per output channel  
• Flashes when the amplifier output channel has  
stopped operating. Usually this means that the  
amplifier must be serviced. (See Section 15  
Troubleshooting)  
• 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.  
• Illuminates when the channel is ready for signal  
• Illuminates when the channel is initialized and  
ready to produce audio output.  
• Ready indicator will flash when the channel  
is in standby.  
• Ready Indictor will not illuminate or flash when  
the amplifier is in deep sleep.  
• Reserved for future releases (Lite and DSP)  
8. Power Button  
• On/off push button  
9. Cooling Vent  
2. Thermal Indicator  
• Red LED  
• Allows for air flow and cooling of the amplifier  
4. Signal Indicator  
• Green 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 amplification for each channel until  
temperature returns to acceptable level. Once  
the amp cools off enough, led turns off, audio  
starts again.  
6. Power Indicator  
• One per input channel  
• Illuminates when the input signal exceeds  
-24dBu  
• 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.  
page 10  
Operation Manual  
CT Power Amplifiers  
7 Back Panel  
1
2 3  
4
5
6
5
6
7
1. AC Power Inlet  
4. Amp Configuration DIP Switches (see Amp  
5. Amp Input Connectors  
Status/Configuration in section 10.2)  
• Switches 1-5 turn specific settings on and off:  
• Standard IEC type 320 inlet for detachable  
connector  
• 100-240V  
• 3-pin block connector can be used per input  
• High impedance balanced  
-70 Hz HPF (High Pass Filter  
6. Channel Level Controls  
- see Section 8.1)  
2. Reset Button/Breaker  
• One 21-position detented rotary attenuator per  
channel  
• Attenuation range from -100dB to 0dB  
-Auto-Standby  
-Amp Status  
-Green Power (See Section 9.2)  
-Limiter  
• 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.  
7. Output Speaker Connector  
• 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)  
• 4-pin Barrier block type per two channels  
(2-Pin or 8-Pin Phoenix can be used)  
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)  
Operation Manual  
page 11  
CT Power Amplifiers  
8 Amp Configuration  
9 Operating Modes  
8.1 70Hz HPF (High Pass Filter)  
DriveCore Amplifiers can work in a variety of  
power modes.  
Is green mode  
DIP switch on?  
Full Power  
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.  
9.1 Normal  
The amplifier automaticaly operates full output power.  
9.2 Green Power  
Lower voltage rails  
8.2 Limiter  
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.  
Is there a clip  
event?  
The limiter reduces amplifier gain to allow over drive  
without harsh clipping at output.  
Minimum Power  
When Amp Configuration Switch #5 is set to on  
(pushed up), the amplifier will utilize the limiter feature.  
For low input signal levels (less than –40dBu) the  
amplifier will operate with minimum power.  
Increase rails to Full Power  
The amplifier will increase to full power if either of the  
following occurs:  
Figure 9.2.1 How Green Power DIP switches work  
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  
page 12  
Operation Manual  
CT Power Amplifiers  
10 Auxiliary Port  
11 Input Routing  
10.1 Deep Sleep  
This amplifier can route a single channel to the next  
numbered channel.  
In deep sleep mode, the amp consumes less than 1  
watt of power. It is activated via the AUX port with a  
ground closure.  
In CT 475 and CT 4150, DIP switches 6-9 are  
non-functional.  
To bring the amplifier out of deep sleep, remove the  
ground closure via the AUX port.  
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.  
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  
Figure 11.1  
Figure 11.3  
Channel 1 intput sent to all channel  
outputs, overriding channel inputs for  
channels 2,3, and 4  
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  
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.  
Figure 11.2  
Four input signals sent to four outputs  
Operation Manual  
page 13  
CT Power Amplifiers  
13 Advanced Features  
14 Accessories  
14.1 XFMR 4/8  
13.1 Protection Systems  
13.1.7 Auto-Standby  
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.  
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.  
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.  
13.1.1Thermal 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.  
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.  
13.2 Features  
13.2.1 Switching Power Supply  
13.1.2 Fault  
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).  
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.  
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.  
13.1.3 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.  
13.2.2 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 RailTechnology (ART)  
13.1.4 AC Under/OverVoltage  
Protection  
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.  
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 amplifier will turn back on  
when the AC line voltage returns to safe operating  
levels (within 10%).  
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:  
13.1.5 Circuit Breaker  
A circuit breaker located near the IEC power inlet  
protects the amplifier from excessive AC current draw.  
-Greater than 90% Efficiency  
-118dB Signal to Noise  
-THD less than .05% in midband  
frequencies  
13.1.6 Convection-cooled Chassis  
The DriveCore amplifiers require no fans for cooling,  
providing quiet operation and optimum efficiency.  
page 14  
Operation Manual  
CT Power Amplifiers  
FLASHING  
15 Troubleshooting  
CONDITION: Thermal indicator is flashing  
15.1 Power Indicator  
POSSIBLE REASON  
OFF  
• Amplifier has become too hot to operate. Allow amplifier  
to cool. Amplifier will not pass audio if amplifier has  
become too hot  
CONDITION: Power indicator is OFF.  
POSSIBLE REASON  
• The amplifier has lost AC power.  
• The amplifier’s Power switch is off.  
15.4 Clip Indicator  
• The amplifier is not plugged into the power receptacle.  
ON or FLASHING  
• The amplifier 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: Clip indicator is ON or FLASHING.  
POSSIBLE REASON  
• input level or output level is distorting  
FLASHING  
CONDITION: Power indicator is FLASHING.  
15.5 Signal Indicator  
POSSIBLE REASON  
OFF  
• The AC line voltage has dropped below +15/-25 or has  
risen above +15/-25% of the nominal line voltage of the  
power supply.  
CONDITION: Signal indicator is flashing even  
though audio is applied, and the channel is  
ready.  
• Amp is in Deep Sleep Mode.  
POSSIBLE REASON  
• Input signal level is very low  
• Level controls are turned down  
15.2 Fault Indicator  
FLASHING  
CONDITION: Fault indicator is FLASHING.  
15.6 Ready Indicator  
POSSIBLE REASON  
OFF  
• The amplifier channel has stopped operating. Refer the  
unit to an authorized Crown Service Center.  
• Check for shorted outputs  
CONDITION: Ready indicator is OFF.  
POSSIBLE REASON  
• Amplifier may be in deep sleep  
15.3Thermal Indicator  
ON  
FLASHING  
CONDITION:Thermal indicator is ON.  
POSSIBLE REASON  
CONDITION: Ready Indicator flashing  
• The amplifier 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 setting.  
POSSIBLE REASON  
• Amplifier is in Standby mode. Flashing will stop once  
there is an input signal.  
Operation Manual  
page 15  
CT Power Amplifiers  
16 Specifications  
Performance  
CT475  
CT4150  
CT875  
CT8150  
Channels  
4
4
8
8
Sensitivity  
1.4V*  
1.4V*  
1.4V*  
1.4V*  
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  
Rated Power Output  
Signal to Noise Ratio (below rated power 20Hz to 20kHz, A-Weighted)  
110 dB  
< 0.05%  
< 0.05%  
0.5 dB  
110 dB  
< 0.05%  
< 0.05%  
0.5 dB  
110 dB  
< 0.05%  
< 0.05%  
0.5 dB  
110 dB  
< 0.05%  
Total Harmonic Distortion (THD) (full rated power, 1kHz)  
Intermodulation Distortion (from 0dB down to -30dB)  
Frequency Response (at 1W into 4/8 ohms)  
Common Mode Rejection (20Hz to 1kHz)  
Load Ranges  
< 0.05%  
0.5 dB  
> 70 dB  
> 70 dB  
> 70 dB  
> 70 dB  
4-160 Ohms  
4-160 Ohms  
4-160 Ohms  
4-160 Ohms  
General  
CT475  
CT4150  
CT875  
CT8150  
Dimension (H x W x D)  
Net Weight  
1.75” x 19” x 15.19”  
10 lbs  
1.75” x 19” x 15.19”  
10 lbs  
1.75” x 19” x 15.19”  
10 lbs  
1.75” x 19” x 15.19”  
10 lbs  
Net Shipping Weight  
15 lbs  
15 lbs  
15 lbs  
15 lbs  
*26dBgain  
**Amplifier is stable for 20hm loads  
page 16  
Operation Manual  
CT Power Amplifiers  
17 AC Power Draw and Thermal Dissipation  
AC Power Draw andThermal 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  
240VAC  
Watts Out  
Thermal Dispation  
Watts  
out  
Watts  
Dissipated  
Watts  
Dissipated  
Watts Out  
Per 1A Line  
Current  
Load Watts in  
Watts in Watts out  
Line  
Current  
Line  
Per 1A Line  
Current  
btu/hr  
kcal/hr  
Current  
Idle (Deep Sleep)  
Idle (Auto Standby)  
Idle (Awake)  
-
0.9  
11  
<0.1  
0.30  
0.40  
0.25  
1.25  
1.33  
1.35  
2.65  
2.70  
2.75  
1.22  
1.23  
1.27  
2.52  
2.56  
2.64  
1.00  
11.00  
15.00  
-
0.90  
10.00  
13.20  
9
1
15.8  
25  
-
3.41  
53.88  
85.25  
-
0.86  
13.57  
21.48  
-
-
0.22  
0.25  
0.20  
0.80  
0.84  
0.90  
1.60  
1.70  
1.80  
0.73  
0.74  
0.76  
1.50  
1.52  
1.58  
-
15  
Idle (Green Power)  
-
9.7  
64  
8
6
4
8
6
4
8
6
4
8
6
4
38  
38  
30  
28  
28  
38  
37  
36  
31  
30  
30  
40  
39  
38  
27  
62  
64  
38  
38  
47  
45  
42  
63  
59  
56  
51  
51  
49  
67  
66  
63  
25  
27  
29  
40  
45  
49  
23  
24  
26  
36  
38  
44  
90.37  
92.07  
110.83  
143.22  
160.27  
170.50  
83.27  
85.59  
92.41  
130.26  
138.62  
155.84  
22.76  
23.19  
27.92  
36.08  
40.37  
42.95  
20.98  
21.56  
23.28  
32.81  
34.92  
39.26  
1/8th Power Pink  
Noise  
65  
27  
70  
38  
33  
66  
38  
142  
147  
150  
62  
100  
100  
100  
38  
42  
140  
145  
149  
60  
100  
100  
100  
38  
1/3rd Power Pink  
Noise  
47  
50  
24  
1/8th Power Sine  
1/3rd Power Sine  
63  
38  
25  
61  
38  
65  
38  
27  
63  
38  
138  
141  
146  
100  
100  
100  
38  
136  
138  
144  
100  
100  
100  
41  
46  
Operation Manual  
page 17  
CT Power Amplifiers  
17 AC Power Draw and Thermal Dissipation  
AC Power Draw andThermal 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  
240VAC  
Watts Out  
Thermal Dispation  
Watts  
out  
Watts  
Dissipated  
Watts  
Dissipated  
Watts Out  
Per 1A Line  
Current  
Load Watts in  
Watts in Watts out  
Line  
Current  
Line  
Per 1A Line  
Current  
btu/hr  
kcal/hr  
Current  
Idle (Deep Sleep)  
Idle (Auto Standby)  
Idle (Awake)  
-
0.9  
11.9  
17.5  
9.7  
<0.1  
0.35  
0.60  
0.25  
1.90  
2.10  
2.20  
3.95  
4.00  
4.15  
1.80  
1.82  
1.89  
3.89  
3.98  
4.12  
1.00  
11.90  
17.50  
-
0.90  
10.90  
16.50  
9
<0.1  
0.28  
0.37  
0.20  
1.20  
1.25  
1.32  
2.45  
2.55  
2.60  
1.08  
1.09  
1.13  
2.34  
2.37  
2.48  
1
15.8  
25  
-
3.41  
0.86  
13.57  
21.48  
-
-
53.88  
-
85.25  
Idle (Green Power  
-
-
8
6
4
8
6
4
8
6
4
8
6
4
98  
63  
63  
33  
30  
28  
42  
42  
40  
35  
34  
33  
43  
42  
40  
36  
96  
120  
105  
230  
244  
248  
94  
63  
63  
53  
50  
48  
68  
65  
64  
58  
57  
55  
71  
70  
67  
33  
39  
42  
63  
77  
81  
31  
33  
37  
54  
58  
68  
121.06  
134.70  
179.03  
214.83  
262.57  
276.21  
109.12  
114.24  
127.88  
188.23  
205.96  
238.02  
30.49  
33.93  
45.10  
54.12  
66.14  
69.58  
27.49  
28.78  
32.21  
47.42  
51.88  
59.96  
1/8th Power Pink  
Noise  
102  
115  
225  
230  
240  
95  
40  
63  
53  
63  
167  
167  
167  
63  
58  
167  
167  
167  
63  
1/3rd Power Pink  
Noise  
63  
73  
32  
1/8th Power Sine  
1/3rd Power Sine  
96  
63  
34  
95  
63  
100  
222  
227  
237  
63  
38  
99  
63  
167  
167  
167  
55  
221  
225  
235  
167  
167  
167  
60  
70  
page 18  
Operation Manual  
CT Power Amplifiers  
17 AC Power Draw and Thermal Dissipation  
AC Power Draw andThermal 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  
240VAC  
Watts Out  
Thermal Dispation  
Watts  
out  
Watts  
Dissipated  
Watts  
Dissipated  
Watts Out  
Per 1A Line  
Current  
Load Watts in  
Watts in Watts out  
Line  
Current  
Line  
Per 1A Line  
Current  
btu/hr  
kcal/hr  
Current  
Idle (Deep Sleep)  
Idle (Auto Standby)  
Idle (Awake)  
-
0.9  
17  
<0.1  
0.40  
0.50  
0.40  
2.40  
2.50  
2.60  
4.66  
4.90  
5.30  
2.11  
2.14  
2.20  
4.60  
4.66  
4.82  
1.00  
17.00  
23.00  
-
0.90  
15.50  
21.00  
14  
<0.1  
0.25  
0.32  
0.30  
1.32  
1.40  
1.60  
2.85  
2.90  
3.00  
1.27  
1.28  
1.32  
2.77  
2.80  
2.90  
1
15.8  
25  
-
3.41  
0.86  
14.60  
21.48  
-
-
57.97  
-
23  
85.25  
Idle (Green Power)  
-
14.5  
117  
121  
126  
277  
284  
292  
115  
116  
119  
269  
273  
283  
-
8
6
4
8
6
4
8
6
4
8
6
4
75  
75  
31  
30  
29  
43  
41  
38  
35  
35  
34  
43  
43  
42  
42  
114  
117  
122  
270  
275  
283  
113  
114  
118  
266  
269  
279  
75  
75  
57  
54  
47  
70  
69  
67  
59  
58  
57  
72  
71  
69  
39  
42  
47  
70  
75  
83  
38  
39  
43  
66  
69  
79  
143.22  
156.86  
173.91  
262.57  
286.44  
313.72  
136.40  
139.81  
150.04  
236.31  
248.93  
285.08  
36.08  
39.51  
43.81  
66.14  
72.16  
79.03  
34.36  
35.22  
37.80  
59.53  
62.71  
71.81  
1/8th Power Pink  
Noise  
46  
75  
51  
75  
200  
200  
200  
75  
77  
200  
200  
200  
75  
1/3rd Power Pink  
Noise  
84  
92  
40  
1/8th Power Sine  
1/3rd Power Sine  
75  
41  
75  
75  
44  
75  
200  
200  
200  
69  
200  
200  
200  
73  
84  
Operation Manual  
page 19  
CT Power Amplifiers  
17 AC Power Draw and Thermal Dissipation  
AC Power Draw andThermal 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  
240VAC  
Watts Out  
Thermal Dispation  
Watts  
out  
Watts  
Dissipated  
Watts  
Dissipated  
Watts Out  
Per 1A Line  
Current  
Load Watts in  
Watts in Watts out  
Line  
Current  
Line  
Per 1A Line  
Current  
btu/hr  
kcal/hr  
Current  
Idle (Deep Sleep)  
Idle (Auto Standby)  
Idle (Awake)  
-
0.9  
17  
<0.1  
0.35  
0.60  
0.40  
3.40  
4.00  
3.50  
7.60  
6.50  
5.70  
3.37  
4.00  
3.74  
7.85  
9.93  
8.79  
1.00  
17.00  
26.50  
-
1.00  
15.80  
25.00  
14  
<0.1  
0.28  
0.37  
0.30  
2.10  
2.10  
2.10  
4.30  
4.50  
4.40  
1.93  
2.33  
2.12  
4.36  
5.56  
4.93  
1
15.8  
25  
3.41  
0.86  
14.60  
22.76  
-
-
57.97  
-
26.5  
14.5  
179  
221  
207  
438  
550  
525  
183  
221  
205  
452  
570  
507  
90.37  
Idle (Green Power)  
-
-
-
8
6
4
8
6
4
8
6
4
8
6
4
122  
155  
131  
325  
400  
349  
125  
152  
133  
334  
413  
349  
36  
39  
37  
43  
62  
61  
37  
38  
36  
43  
42  
40  
57  
185  
210  
201  
445  
525  
510  
180  
221  
198  
436  
558  
495  
125  
150  
125  
330  
321  
309  
125  
155  
131  
329  
413  
350  
60  
71  
60  
77  
71  
70  
65  
67  
62  
75  
74  
71  
60  
204.60  
225.06  
259.16  
392.15  
695.64  
685.41  
197.78  
232.90  
245.52  
402.38  
535.37  
538.78  
51.54  
56.69  
65.28  
98.79  
175.24  
172.66  
49.82  
58.67  
61.85  
101.36  
134.86  
135.72  
1/8th Power Pink  
Noise  
66  
60  
76  
76  
113  
150  
176  
58  
115  
204  
201  
55  
1/3rd Power Pink  
Noise  
1/8th Power Sine  
1/3rd Power Sine  
68  
66  
72  
67  
118  
157  
158  
107  
145  
145  
page 20  
Operation Manual  
CT Power Amplifiers  
18 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.  
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  
4. Use a bold black marker and write the SRA number  
on three sides of the box.  
1. Open carton and lift center cushion leaving both  
end-cushions in place.  
5. Record the SRA number for future reference. The  
SRA number can be used to check the repair status.  
2. Carefully place your product with the product’s front  
panel facing the same direction as arrows indicate.  
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:  
17.2.2 Factory Service  
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.  
17.2.4 Packing Instructions  
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  
For more information, please contact us direct.  
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.  
CAUTION: To prevent electric shock,  
do not remove covers. No user serviceable  
parts inside. Refer servicing to a qualified  
technician.  
1. Fill out and include the Crown Audio Factory Service  
Information sheet in the back of this manual.  
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.  
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.  
A Service Return Authorization (SRA) is required for  
product being sent to the factory for repair. An SRA can be  
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.  
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.  
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  
possession of Crown after 30 days of the estimate will  
become the property of Crown Audio Inc.  
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.)  
Warranty is only valid within the country in which the  
product is purchased.  
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.  
17.1 International and Canada Service  
17.2.6 Payment of Non-Warranty Repairs  
Service may be obtained from an authorized service  
center. (Contact your local Crown/Amcron  
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.  
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.  
4. If you provide your own shipping pack, the minimum  
recommended requirements for materials are as  
follows:  
17.2.3 Factory Service Shipping  
Instructions:  
If you have any questions, please contact Crown Factory  
Service.  
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.  
1. Service Return Authorization (SRA) is required for  
product being sent to the factory for service. Please  
complete the SRA by going to  
Crown Factory Service  
1718 W. Mishawaka Rd.,  
Elkhart, Indiana 46517 U.S.A.  
17.2 US Service  
do not have access to our website, call  
1.800.342.6939, extension 8205 and we’ll create the  
SRA for you.  
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.  
b. Securely seal the package with an adequate carton  
sealing tape.  
Telephone:  
574.294.8200  
800.342.6939 (North America,  
Puerto Rico, and Virgin Islands only)  
c. Do not use light boxes or “peanuts”. Damage caused  
by poor packaging will not be covered under  
warranty.  
2. See packing instructions that follow.  
17.2.1 Service at a US Service Center  
Facsimile:  
574.294.8301 (Technical Support)  
574.294.8124 (Factory Service)  
3. Ship product to:  
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.  
Using your ‘foam-in-place’ shipping pack  
CROWN AUDIO FACTORY SERVICE  
1718 W MISHAWKA RD.  
ELKHART, IN 46517  
Note: The foam-in-place packing is molded so that there  
is only one correct position for your product.  
Internet:  
Operation Manual  
page 21  
CT Power Amplifiers  
19 Warranty  
18.1 UNITED STATES & CANADA  
SUMMARY OFWARRANTY  
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.)  
THIS INCLUDES ANY DAMAGE TO ANOTHER  
PRODUCT OR PRODUCTS RESULTING FROM  
SUCH A DEFECT. SOME STATES DO NOT ALLOW  
THE EXCLUSION OR LIMITATIONS OF  
INCIDENTAL OR CONSEQUENTIAL DAMAGES,  
SO THE ABOVE LIMITATION OR EXCLUSION  
MAY NOT APPLY TO YOU.  
Crown International, 1718 West Mishawaka Road,  
Elkhart, Indiana 46517-4095 U.S.A. warrants to  
you, the ORIGINAL PURCHASER and ANY  
SUBSEQUENT 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.  
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.  
Warranty is only valid within the country in which  
the product was purchased.  
ITEMS EXCLUDED FROMTHIS  
CROWNWARRANTY  
DESIGN CHANGES  
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  
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.  
HOWTO OBTAINWARRANTY  
SERVICE  
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.  
You must notify us of your need for warranty  
service within the warranty period. All  
LEGAL REMEDIES OF PURCHASER  
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.  
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.  
WHATTHEWARRANTORWILL 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  
THIS STATEMENT OF WARRANTY SUPERSEDES  
ANY OTHERS CONTAINED IN THIS MANUAL FOR  
DISCLAIMER OF CONSEQUENTIAL  
AND INCIDENTAL DAMAGES  
CROWN PRODUCTS.  
10/10  
YOU ARE NOT ENTITLED TO RECOVER FROM US  
ANY INCIDENTAL DAMAGES RESULTING FROM  
ANY DEFECT IN THE NEW CROWN PRODUCT.  
page 22  
Operation Manual  
CT Power Amplifiers  
19 Warranty  
18.2 WORLDWIDE EXCEPT USA & CANADA  
SUMMARY OF WARRANTY  
WHAT THE WARRANTOR WILL DO  
DISCLAIMER OF CONSEQUENTIAL AND  
INCIDENTAL DAMAGES  
Crown International, 1718 West Mishawaka Road,  
Elkhart, Indiana 46517-4095 U.S.A. warrants to  
you, the ORIGINAL PURCHASER and ANY  
SUBSEQUENT 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.  
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.  
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.  
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 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.  
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.  
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.  
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  
Operation Manual  
page 23  
CT Power Amplifiers  
THIS PAGE INTENTIONALLY LEFT BLANK  
page 24  
Operation Manual  
CT Power Amplifiers  
PRODUCT REGISTRATION  
Crown Audio, Inc.  
1718 W. Mishawaka Rd.  
Elkhart, IN 46517-9439  
Phone: 574-294-8000  
Fax: 574-294-8329  
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.  
1718 W Mishawaka Rd  
Elkhart IN 46517  
Fax: 574-294-8329  
Please note that some information is required. Incomplete registrations will not be processed. * Indicates required information.  
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 #: __________________________________  
PRODUCT INFORMATION  
* MODEL  
e.g. IT8000, CDi1000, PCC160  
* SERIAL #  
e.g. 8000000000  
* PURCHASE DATE  
mo/day/yr  
________________________________  
________________________________  
________________________________  
________________________________  
____________________  
____________________  
____________________  
____________________  
______ /_____ /_____  
______ /_____ /_____  
______ /_____ /_____  
______ /_____ /_____  
Product purchased from: *(Business/Individual) ___________________________ Country: ________________________  
Comments: ____________________________________________________________________________________  
_____________________________________________________________________________________________  
_____________________________________________________________________________________________  
Operation Manual  
page 25  
CT Power Amplifiers  
THIS PAGE INTENTIONALLY LEFT BLANK  
page 26  
Operation Manual  
CT Power Amplifiers  
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  
Personal/Consumer  
Visa  
American Express  
Discover  
Type of credit card account:  
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: __________________________________________________________________________  
__________________________________________________________________________  
__________________________________________________________________________  
Operation Manual  
page 27  

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