Crown CTs 600 User Manual

Operation Manual

CTs 2-Channel Series

CTs 600

CTs 1200

CTs 2000

CTs 3000

Obtaining Other Language Versions:

local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible

situation which may arise during installation, operation or maintenance.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have

occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.

Trademark Notice:

IQwic, PIP and PIP2 are trademarks of Crown International. Other trademarks are the property of their respective owners.

© 2005 by Crown Audio®, Inc. 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: [phone]

Com-Tech, BCA, Crown, Crown Audio, Amcron and Multi-Mode are registered trademarks of Crown International.

To obtain information in another language about the use of this product, please contact your

Some models may be exported under the name Amcron.

®

134433-6

7/05

Important Safety Instructions

CTs 2-Channel Power Amplifiers

1) Read these instructions.

2) Keep these instructions.

3) Heed all warnings.

4) Follow all instructions.

5) Do not use this apparatus near water.

6) Clean only with a dry cloth.

7) Do not block any ventilation openings. Install
in accordance with the manufacturer’s instruc­tions.

8) Do not install near any heat sources such as
radiators, heat registers, stoves, or other
apparatus (including amplifiers) that produce
heat.

9) Do not defeat the safety purpose of the polar­ized or grounding-type plug. A polarized plug
has two blades with one wider than the other.
A grounding-type plug has two blades and a
third grounding prong. The wide blade or the
third prong is provided for your safety. If the
provided plug does not fit into your outlet,
consult an electrician for replacement of the
obsolete outlet.

10) Protect the power cord from being walked on
or pinched, particularly at plugs, convenience
receptacles, and the point where they exit from
the apparatus.

11) Only use attachments/accessories specified
by the manufacturer.

12) Use only with a cart, stand, 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 power­supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to
rain or moisture, does not operate normally,
or has been dropped.

15) To reduce the risk of fire or electric shock, do
not expose this apparatus to rain or moisture.

16) Do not expose to dripping or splashing. Do
not place objects filled with liquid on unit.

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.

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.

IMPORTANT

CTs Series amplifiers require Class 2 output wiring.

MAGNETIC FIELD

CAUTION! Do not locate sensitive high-gain equip­ment such as preamplifiers or tape decks directly
above or below the unit. Because this amplifier has
a high power density, it has a strong magnetic field
which can induce hum into unshielded devices that
are located nearby. The field is strongest just above
and below the unit.

If an equipment rack is used, we recommend locat­ing the amplifier(s) in the bottom of the rack and the
preamplifier or other sensitive equipment at the top.

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.

This device complies with part 15 of the FCC rules. Operation is subject to the following

FCC COMPLIANCE NOTICE

two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.

CAUTION: Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This equip­ment generates, uses, and can radiate radio frequency energy and, if not installed and used
in accordance with the operation manual, may cause harmful interference to radio commu­nications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television recep­tion, which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.

• Consult the dealer or an experienced radio/TV technician for help.

page 2

Operation Manual

CTs 2-Channel Power Amplifiers

Crown International, Inc.

ISSUED BY: Crown International, Inc.

1718 W. Mishawaka Road
Elkhart, Indiana 46517 U.S.A.

European Representative's Name and Address:

Nick Owen
35, Bassets Field
Thornhill
Cardiff. South Glamorgen
CF14 9UG United Kingdom

Equipment Type: Commercial Audio Power Amplifiers
Family Name: CTs
Model Names: CTs 3000, CTs 2000, CTs 1200, CTs 600

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 61000-3-2:1995+A14:2000 Limits for Harmonic Current Emissions (equipment input current ≤16A per phase)
EN 61000-3-3:1995 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current ≤16A
EN 55022:2003 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 61000-4-2:2003 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge)
EN 61000-4-3:2003 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, criteria A)
EN 61000-4-4:2005 Electrical Fast Transient/Burst Immunity (Criteria B)
EN 61000-4-5:2001 Surge Immunity (Criteria B)
EN 61000-4-6:1996 Immunity to Conducted Disturbances Induced by Radio-Frequency Fields (Criteria A)
EN 61000-4-11:2004 Voltage Dips, Short Interruptions and Voltage Variation

Safety Standard:
EN 60065: 1998 Safety Requirements - Audio Video and Similar Electronic Apparatus

I certify that the product id entified above conforms to the requirements of the EMC Council Directive 89/336/EEC as amended by 92/31/EEC, and the Low Voltage Directive 73/23/EES as amended by 93/68/EEC.

Signed

Larry Coburn

Title: Senior Vice President of Manufacturing

DECLARATION of CONFORMITY

FOR COMPLIANCE QUESTIONS ONLY:

Date of Issue: March 1, 2002

Sue Whitfield
574-294-8289
[e-mail]

Operation Manual

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

page 3

Table of Contents

CTs 2-Channel Power Amplifiers

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

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

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

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

2 How to Use This Manual .................................... 6

3 Setup ........................................................... 7

3.1 Unpack Your Amplifier ....................................................... 7

3.2 Install Your Amplifier ......................................................... 7

3.3 Ensure Proper Cooling ....................................................... 7

3.4 Choose Input Wire and Connectors .................................... 8

3.5 Choose Output Wire and Connectors ................................. 8

3.6 Wire Your System .............................................................. 9

3.6.1 Dual 8/4/2 Mode ....................................................... 9

3.6.2 Bridge-Mono 16/8/4 Mode........................................ 9

3.6.3 Dual 70V/100V Mode ................................................ 10

3.6.4 Bridge-Mono 140V/200V Mode ................................ 10

3.6.5 Dual Mode with “Y” Input .......................................... 11

3.7 Connect to AC Mains ......................................................... 12

3.8 Startup Procedure .............................................................. 12

4 Operation ...................................................... 12

4.1 Precautions ........................................................................12

4.2 Front Panel Controls and Indicators ...................................13

4.3 Back Panel Controls and Connectors ................................. 14

5 Advanced Features and Options ...........................15

5.1 Protection Systems ............................................................15

5.1.1 Thermal Level Control (TLC) .....................................15

5.1.2 Junction Temperature Simulation (JTS) .....................15

5.1.3 Fault ..........................................................................15

5.1.4 High-Pass Filters ......................................................15

5.1.5 Low-Pass Filters .......................................................15

5.1.6 AC Under/Over Voltage Protection ............................15

5.1.7 Circuit Breaker ..........................................................15

5.1.8 DC Output Servo .......................................................15

5.1.9 Inrush Limiting ..........................................................15

5.1.10 Variable-speed Fans ................................................15

5.2 Advanced Features .............................................................15

5.2.1 Switching Power Supply ...........................................15

5.2.2 Input Compressor .....................................................15

5.2.3 Sleep Circuit..............................................................15

5.2.4 Input Sensitivity Switches .........................................16

5.3 Options ..............................................................................16

5.3.1 Nominal Attenuation Settings ....................................17

6 Troubleshooting ...............................................18

7 Specifications .................................................20

8 AC Power Draw and Thermal Dissipation .................24

9 Service .........................................................28

9.1 International and Canada Service ........................................28

9.2 US Service ...........................................................................28

9.2.1 Service at a US Service Center ...................................28

9.2.2 Factory Service ..........................................................28

9.2.3 Factory Service Shipping Instructions ........................28

9.2.4 Packing Instructions....................................................28

9.2.5 Estimate Approval.......................................................28

9.2.6 Payment of Non-Warranty Repairs ..............................28

10 Warranty ......................................................29

Crown Audio Factory Service Information Form .............................31

page 4

Operation Manual

CTs 2-Channel Power Amplifiers

20 Hz–20 kHz

*

CTs 600

2-ohm Dual (per ch.)
4-ohm Dual (per ch.)
8-ohm Dual (per ch.)
16-ohm Dual (per ch.)
70V Dual (per ch.)
4-ohm Bridge
8-ohm Bridge
16-ohm Bridge
140V Bridge

*20 Hz–20 kHz Power: refers to maximum
average power in watts from 20 Hz
to 20 kHz with 0.1% THD.

CTs 1200

2-ohm Dual (per ch.)
4-ohm Dual (per ch.)
8-ohm Dual (per ch.)
16-ohm Dual (per ch.)
70V Dual (per ch.)
4-ohm Bridge
8-ohm Bridge
16-ohm Bridge
140V Bridge

*20 Hz–20 kHz Power: refers to maximum
average power in watts from 20 Hz to 20 kHz
with 0.1% THD.

Power

150W
300W
300W
300W
300W
300W
600W
600W
600W

20 Hz–20 kHz

*

Power

250W
600W
600W
300W
600W

500W
1200W
1200W
1200W

1 Welcome

Building on the foundation of the Com-Tech®
Series, the Crown

bility and value for installed sound. The Com­Tech Series was the first to offer independent
selection of high- and low-impedance opera­tion for a specific channel, and CTs Series
amplifiers continue that tradition, with power
levels and features carefully chosen to perfectly
integrate into fixed install design requirements.

Modern power amplifiers are sophisticated
pieces of engineering capable of producing
extremely high power levels. They must be
treated with respect and correctly installed if
they are to provide the many years of reliable
service for which they were designed.

In addition, CTs Series amplifiers include a
number of features which require some expla­nation before they can be used to their maxi­mum advantage.

Please take the time to study this manual so
that you can obtain the best possible service
from your amplifier.

1.1 Features

• Switching Power Supply for reduced
weight.

• High power-density, with all two-channel
models in a 2U chassis.

®

CTs Series offers new flexi-

• Direct constant-voltage
(70V/140V) or low-impedance (2/4/8
ohm) operation. No switch required.

• Input sensitivity is independently select­able for each channel. Choose low-imped­ance (4/8 ohm), constant-voltage (70V/
100V/140V/200V), or 26 dB.

• TLC protection circuitry protects the
amplifier from long-term excessive heat by
subtly and dynamically reducing the gain
only when necessary.

• JTS circuitry (CTs 600/1200 only) quickly
protects BJT output transistors from
unsafe operating conditions without shut­ting the channel down. (Not applicable to
BCA amplifiers as they are inherently pro­tected.)

• PIP2™ (Programmable Input Processor)
connector accepts accessory modules that
tailor the amplifier to suit specific applica­tions.

• Removable terminal block input connec­tors, with “Y” Input Switch in the standard
PIP2-BBY module.

(Continued on next page)

20 Hz–20 kHz

*

CTs 2000

2-ohm Dual (per ch.)
4-ohm Dual (per ch.)
8-ohm Dual (per ch.)
16-ohm Dual (per ch.)
70V Dual (per ch.)
100V Dual (per ch.)
4-ohm Bridge
8-ohm Bridge
16-ohm Bridge
140V Bridge
200V Bridge

*20 Hz–20 kHz Power: refers to maximum
average power in watts from 20 Hz
to 20 kHz with 0.35% THD.

CTs 3000

2-ohm Dual (per ch.)
4-ohm Dual (per ch.)
8-ohm Dual (per ch.)
16-ohm Dual (per ch.)
70V Dual (per ch.)
100V Dual (per ch.)
4-ohm Bridge
8-ohm Bridge
16-ohm Bridge
100V Bridge
200V Bridge

*20 Hz–20 kHz Power: refers to maximum
average power in watts from 20 Hz
to 20 kHz with 0.35% THD.

Power

1000W
1000W
1000W

625W
1000W
1000W
2000W
2000W
2000W
2000W
2000W

20 Hz–20 kHz

*

Power

1500W
1500W
1250W

625W
1500W
1500W
3000W
3000W
2500W
3000W
3000W

Operation Manual

page 5

1 Welcome

CTs 2-Channel Power Amplifiers

Features (continued from page 4)

• Switchable high-pass filter for each chan­nel provides low-frequency roll off to elim­inate step down transformer saturation
when used in distributed systems.

• Comprehensive array of indicators includ­ing Power, Data, and Bridge; along with
Ready, Signal, Clip, Thermal and Fault for
each channel, provide accurate diagnos­tics.

• Blue Power Indicator flashes if the ampli­fier shuts off due to an under/over-voltage
condition on the AC mains.

• Advanced protection circuitry guards
against: shorted outputs, DC, mismatched
loads, general overheating, under-/over­voltage, high-frequency overloads and
internal faults.

• Legendary Crown class I (BCA®) and
class AB+B (Multi-Mode
ogies offer the best in amplifier reliability.
CTs 600/1200 use Class AB+B; CTs 2000/
3000 use Class I.

• Class I is the lowest distortion, lowest
noise, and highest performing topology
available among switch-mode amplifiers.

• Continuously-variable fans optimize cool­ing efficiency.

• Three Year, No-Fault, Fully-Transferable
Warranty completely protects your invest­ment and guarantees its specifications.

®

) output topol-

2 How to Use This
Manual

This manual provides you with the necessary
information to safely and correctly setup and
operate your amplifier. It does not cover every
aspect of installation, setup or operation that
might occur under every condition. For addi­tional information, please consult Crown’s
Amplifier Application Guide (available online at
www.crownaudio.com), Crown Tech Support,
your system installer or retailer.

We strongly recommend you read all instruc­tions, warnings and cautions contained in this
manual. Also, for your protection, please send
in your warranty registration card today. And
save your bill of sale—it’s your official proof of
purchase.

page 6

Operation Manual

CTs 2-Channel Power Amplifiers

3 Setup

3.1 Unpack Your Amplifier

Please unpack and inspect your amplifier for
any damage that may have occurred during
transit. If damage is found, notify the transpor­tation company immediately. Only you can ini­tiate a claim for shipping damage. Crown will
be happy to help as needed. Save the shipping
carton as evidence of damage for the shipper’s
inspection.

We also recommend that you save all packing
materials so you will have them if you ever
need to transport the unit. Never ship the

unit without the factory pack.

YOU WILL NEED (not supplied):

• Input wiring cables

• Output wiring cables
Rack for mounting amplifier (or a stable surface

for stacking)

WARNING: Before you start to set up
your amplifier, make sure you read and
observe the Important Safety Instruc­tions found at the beginning of this
manual.

3.2 Install Your Amplifier

CAUTION: Before you begin, make sure
your amplifier is disconnected from the
power source, with power switch in the
“off” position and all level controls
turned completely down (counterclock­wise).

Use a standard 19-inch (48.3 cm) equipment
rack. See Figure 3.1 for amplifier dimensions.

You may also stack amps without using a cabi­net.

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

3.3 Ensure Proper Cooling

When using an equipment rack, mount units
directly on top of each other. Close any open
spaces in rack with blank panels. DO NOT
block front or rear air vents. The side walls of
the rack should be a minimum of two inches
(5.1 cm) away from the amplifier sides, and the
back of the rack should be a minimum of four
inches (10.2 cm) from the amplifier back panel.

Figure 3.2 illustrates standard amplifier airflow.

Operation Manual

Figure 3.2 Airflow

FRONT

Figure 3.1 CTS 2-Channel Series Dimensions

page 7

3 Setup

3.4 Choose Input Wire
and Connectors

Figure 3.3 shows connector pin assignments for
balanced wiring, and Figure 3.4 shows connec­tor pin assignments for unbalanced wiring.

NOTE: Custom wiring should only be per­formed by qualified personnel.

3.5 Choose Output Wire and Con­nectors

A protective cover is installed over the barrier­strip output. Some models have a cover with two
holes. To remove this type of cover:

1. Loosen screws inside top and bottom holes of
cover (see Figure 3.6).

2. Slide cover to left or right, then pull it off away
from the amplifier.

Crown recommends using professionally con­structed, high-quality, two- or four-conductor,
heavy gauge speaker wire and connectors. You
may use terminal forks up to 10 AWG or bare
wire for your output connectors (see Figure 3.5).
To prevent the possibility of short-circuits, wrap
or otherwise insulate exposed loudspeaker cable
connectors. For best results, Crown recom­mends Panduit part #PV10-10LF-L or equivalent
terminal fork. Screw spacing is shown in Figure

3.5.
Using the guidelines below, select the appropri-

ate size of wire based on the distance from
amplifier to speaker (low-impedance loads only).

Distance Wire Size

up to 25 ft. (7.6m) 16 AWG

26-40 ft. (7.9-12.2m) 14 AWG

41-60 ft. (12.5-18.3m) 12 AWG

> 60 ft (18.3m) 10 AWG

CTs 2-Channel Power Amplifiers

Figure 3.3
Balanced Input
Connector Wiring

Figure 3.4
Unbalanced Input
Connector Wiring

page 8

CAUTION: Never use shielded cable for
output wiring.

Replace output cover after output wiring
is complete.

Figure 3.6 How to Remove the Two-Holed
Barrier-Block Cover

Figure 3.5 Typical Output Connector Wiring

Operation Manual

CTs 2-Channel Power Amplifiers

3 Setup

3.6 Wire Your System

3.6.1 Dual 8/4/2 Mode

Typical input and output wiring, along with Attenuator
and Mode Switch settings are shown in Figures 3.6 and

3.7. Make sure the Mode switch is set to the “Dual” posi­tion when operating in Dual mode.

INPUTS: Connect input wiring for each channel. The Y
switch on the rear PIP panel can be used to parallel the
channel inputs when only mono input signals are neces­sary. The amplifier’s channel outputs are still indepen­dent.

OUTPUTS: Maintain proper polarity (+/–) on
output connectors.

Connect the Channel 1 speaker’s positive (+) lead to
amplifier Channel 1 positive terminal; repeat for negative
(–). Repeat Channel-2 wiring as for Channel 1. Refer to
Section 3.5 for output connector pin assignments.

3.6.2 Bridge-Mono 16/8/4 Mode

Typical input and output wiring, along with Attenuator
and Mode Switch settings, are shown in Figures 3.8 and

3.9. Make sure the Mode switch is set to the “Mono”
position when operating in Bridge-Mono mode.

INPUTS: Connect input wiring to Channel 1 only.
OUTPUTS: Connect the speaker across the positive ter-

minals of each channel pair. Do not use the negative ter­minals of the channel pair when the pair is being
operated in Bridge-Mono mode. Refer to Section 3.5 for
output connector pin assignments.

NOTE: Crown provides a reference of wiring pin assign­ments for commonly used connector types in the Crown
Amplifier Application Guide available at
www.crownaudio.com.

NOTE: When operating in Bridge-Mono mode,
turn down (full CCW) the Input Attenuator for
Channel 2. The Channel-1 Input Atttenuator
works both channels.

See the next page for constant-voltage operation.

Figure 3.8 Attenuator and Mode-

Switch Settings for Dual Mode

Figure 3.7 System Wiring, Dual Mode.

Always route the input and output wires in
separate bundles.

Figure 3.10 Attenuator and Mode-

Switch Settings for Bridge-Mono Mode

Operation Manual

Figure 3.9 System Wiring, Bridge-Mono Mode

page 9

3 Setup

3.6.3 Dual 70V/100V Mode

Typical input and output wiring, along with Atten­uator and Mode Switch settings are shown in Fig­ures 3.10 and 3.11. Make sure the Mode switch is
set to the “Dual” position when operating in Dual
mode.

INPUTS: Connect input wiring to both channels.
OUTPUTS: In Dual Mode, the CTs 600/1200 can

power 25/50/70V lines; the CTs 2000/3000 can
power 25/50/70/100V lines. Connect each chan­nel of output connectors to speakers that have the
appropriate transformers.

.

CTs 2-Channel Power Amplifiers

Figure 3.12 Attenuator and Mode-Switch

Settings for 70V/100V Operation

3.6.4 Bridge-Mono 140V/200V Mode

Typical input and output wiring, along with Atten­uator and Mode Switch settings are shown in Fig­ures 3.12 and 3.13. Make sure the Mode switch is
set to the “Mono” position when operating in
Bridge-Mono mode.

INPUTS: Connect input wiring to Channel 1 only.
OUTPUTS: In Bridge-Mono mode, the CTs 600/

1200 can power 140V lines; the CTs 2000/3000
can power 140V and 200V lines. Connect speak­ers with 140V or 200V transformers across the
positive terminals of the channel pair. Do not use
the negative terminals of the channel pair when
the pair is being operated in Bridge-Mono mode.
Refer to Section 3.5 for output connector pin
assignments.

NOTE: When operating in Bridge-Mono
mode, turn down (full CCW) the Input
Attenuator for Channel 2. The Channel-1
Input Attenuator works both channels.

page 10

Figure 3.11 System Wiring and Y-Switch Setting for 70V/100V Operation

Figure 3.13 System Wiring and Y-Switch Setting for 140V/200V Operation

Always route the input and output wires in
separate bundles.

Figure 3.14 Attenuator and Mode-Switch

Settings for 140V/200V Operation

Operation Manual

CTs 2-Channel Power Amplifiers

3 Setup

3.6.5 Dual Mode with “Y” Input

See Figure 3.14. This configuration feeds a mono
signal to both Channel 1 and Channel 2. In the
example in Figure 3.14, Channel 1 is driving a low­impedance loudspeaker and Channel 2 is driving a
loudspeaker with a 70V transformer.

INPUTS:
Connect the signal to the Channel 1 input. On the

back panel, set the “Y” Input Switch to ON.
OUTPUTS:
Connect the Channel 1 speaker’s positive (+) lead

to Channel 1 positive terminal of amp; repeat for
negative (–).

Connect the Channel 2 speaker’s positive (+) lead
to Channel 2 positive terminal of amp; repeat for
negative (–).

See Figure 3.15. Turn up both Input Attenuators and
set the Mode Switch to Dual.

NOTE: When the “Y” Input Switch is on, the Chan­nel 2 input can be used to daisy-chain to another
amplifier.

Figure 3.15 System Wiring for “Y” Input Mode

Operation Manual

Always route the input and output wires in
separate bundles.

Figure 3.16

Attenuator and Mode-Switch

Settings for “Y” Input Mode

page 11

3 Setup

CTs 2-Channel Power Amplifiers

page 12

3.7 Connect to AC Mains

On the back panel, check whether your amplifier is labeled
for 120V or 220-240V AC mains. Connect your amplifier
to the corresponding 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, with the amplifier in the OFF position, plug the
other end of the cordset into 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.
Check the amplifier’s back-panel label which specifies the
required AC mains voltage and frequency. The AC mains
voltage must be no more than 15% above the required
voltage, and no less than 25% below the required voltage.
The AC mains frequency must be within the required fre­quency range. If you are unsure of the output voltage of
your AC mains, please consult your electrician.

3.8 Startup Procedure

Use the following procedure when first turning on your
amplifier:

1. Turn down the level of your audio source.

2. Turn down the level controls of the amplifier.

3. Turn on the “Power” switch. The Power indicator
should glow. Wait for the “Ready” LED to illuminate.

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. Verify
that the Signal LED is flashing.

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

If you ever need to make any wiring or installation
changes, don’t forget to turn off the amplifier and discon­nect 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.

4 Operation

4.1 Precautions

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

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

2. Use care when making connections, selecting signal
sources and controlling the output level. The load you
save may be your own!

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

4. Never connect the output to a power supply,
battery or power main. Electrical shock may
result.

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

6. Do not operate the amplifier with the red Clip LEDs
constantly flashing.

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

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

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

Operation Manual

CTs 2-Channel Power Amplifiers

4 Operation

4.2 Front Panel Controls
and Indicators

A. Fault Indicator

Red LED, one per channel, flashes when
the amplifier output channel has stopped
operating. Usually this means that the
amplifier must be serviced.

B. Thermal Indicator

Red LED, one per channel, illuminates
when the channel has shut down, or is
very near shutting down, due to thermal
stress or overload.

C. Ready Indicator

Green LED, one per channel, illuminates
when the channel is initialized and ready to
produce audio output. Indicator is off when
the channel is set to standby mode via the
System Architect or IQ Control Software
packages.

Signal Indicators

Three green LEDS per channel indicate the
amplifier’s input and output signal levels.
From bottom to top the LEDs are:

D. Signal: input signal is above –40 dBu.
E. –20 dB: amplifier output is within 20 dB of

clipping.

F. –10 dB: amplifier output is within 10 dB of

clipping.

G. Clip Indicator

Red LED, one per channel, illuminates
when the channel’s output signal reaches
the onset of audible clipping. The Clip
Indicator also will illuminate during Ther­mal Level Control (TLC) limiting or when
the input compressor/limiter is protecting
the amplifier from input overload.

H. Cooling Vents

Front-to-rear forced airflow.

I. 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 approxi­mately 15% above or 25% below the nom­inal rated value.

J. Data Indicator

Yellow LED indicates control activity This
LED is driven by the IQ-PIP2 module via
the PIP2

interface. Note: Data indicator
flashes only when the installed PIP module
is polled for data, or is polled to see
whether it is online.

K. Bridge Mode Indicator

Yellow LED illuminates when the rear­panel Mode Switch is set to the “Bridge”
position

L. Power Switch

Push-on / push-off switch.

Operation Manual

Figure 4.1 CTs 600 front panel.

page 13

4 Operation

CTs 2-Channel Power Amplifiers

4.3 Back Panel Controls
and Connectors.

CTs 2000/3000 back panel is shown.
CTs 600/1200 look slightly different near
the Reset button.

M. Power Cord Connector

Standard 15 amp IEC inlet. A circuit
breaker located near the IEC power inlet
protects the amplifier from excessive AC
current draw.

N. Reset Switch

Resets the circuit breaker that protects the
power supply.

O. Ventilation Grille

Air flow is front to back. Do not block the
ventilation grilles.

P. PIP ™ Input Panel

PIP2-BBY module includes two balanced
3-pin removable barrier connectors. The
“Y” Input Switch is described under
letter R.

Sensitivity Switches

Behind the input panel are the Input Sensi­tivity Switches. One 3-position switch per
channel selects various sensitivity set­tings. See Section 5.2.4 for details and
diagram.

Q. Mode Switch

This two-position switch is used to select
the amplifier’s mode of operation: Dual or
Bridge Mono.

Dual mode is used for 2/4/8 ohms, for 70V

operation with the CTs 600/1200, and for
70/100V operation with the CTs 2000/

3000.

Bridge mode is used for 4/8/16 ohms, for

140V operation with the CTs 600/1200,
and for 100/140/200V operation with the
CTs 2000/3000.

R. “Y” Input Switch

When set to ON, this switch parallels the
input signals of the two channels, for use
when the input signal is mono. The ampli­fier’s channel outputs are still independent.

The “Y” Input Switch also can be used to
daisy-chain the signal to another amplifier.
See Section 3.6.5 for details.

S. Input Connectors

Balanced 3-pin terminal block connectors,
one per channel.

T. Channel Level Controls

One 21-position detented rotary attenuator
per channel, ranging from –100 dB to 0 dB
gain.

U. High-Pass Filter

One 3-position switch per channel selects
between OFF, 35Hz and 70Hz 3rd-order fil­ters.

V. Speaker Connectors

One four-pole touch-proof terminal strip.
Accepts up to 10 AWG terminal forks.

Output Cover (not shown)

This covers the output connectors, pro­tecting users from the connectors’ poten­tially high voltage. This cover is required
for Class 2 wiring installations. See Sec­tion 3.5 for details on removing covers that
have two holes.

page 14

Figure 4.2 CTs 2000 and 3000 Back Panel Controls and Connectors

Operation Manual

CTs 2-Channel Power Amplifiers

5 Advanced Features
and Options

NOTE: For detailed information about
these Crown amplifier features, please
consult the Crown Amplifier Application
Guide, available on the Crown website
at www.crownaudio.com

5.1 Protection Systems

Your Crown amplifier provides extensive pro­tection and diagnostic capabilities, including
thermal level control, fault indicators, high­pass filtering, DC protect, AC under/over volt­age protection, inrush limiting, and variable­speed fans.

5.1.1 Thermal Level Control (TLC)

If the amplifier becomes too hot for safe opera­tion, the light will shine brightly and TLC will
engage the input compressor. By compressing
the input, the amplifier will not generate as
much heat and will have a chance to cool down.
The degree of compression is proportional to
the amount of overheating. This feature allows
the show to go on, rather than having the
amplifier shut down.

5.1.2 Junction Temperature Simu­lation (JTS) (CTs 600/1200 only)

JTS circuitry simulates the operation of the
amplifier’s output transistors, and compares it
against the transistors known Safe Operation
Area (SOA). If JTS sees that more power is
about to be asked of the output devices than
they are capable of delivering under the present
conditions, JTS immediately limits the drive
level until it falls within the SOA. Limiting is
proportional and kept to an absolute minimum­only what is required to prevent the possibility
of output transistor damage.

This level of protection enables Crown to
increase output transistor utilization while also
greatly increasing amplifier reliability.

5.1.3 Fault

The amplifier will light the Fault LED if the
amplifier output stage stops operating. If this
happens, see Section 8 for servicing informa­tion.

5.1.4 High-Pass Filters

Very low frequency signals contain no useful
musical energy, waste valuable amplifier power
and headroom, and can be damaging to your
speakers. Your Crown amplifier provides high­pass filters to remove these signals from each
channel’s output.

On the back panel are two 3-position 3rd-order
high-pass filter switches (one per channel) with
selections of Off, 35Hz and 70 Hz.

5.1.5 Low-Pass Filters

Gaussian-approximation ultrasonic filters pre­vent ultrasonic feedback and HF burnout in
drivers. This type of filter preserves transient
response better than a Butterworth filter.

5.1.6 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 ampli­fier will turn back on when the AC line voltage
returns to safe operating levels (within +15% /

-25%).

5.1.7 Circuit Breaker

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

5.1.8 DC Output Servo

The output servo circuit protects your drivers
by eliminating DC offset, even in the presence
of very large asymmetrical signals.

5.1.9 Inrush Limiting

A soft-start circuit in the power supply mini­mizes the amplifier’s current draw during
power-on.

5.1.10 Variable-speed Fans

Two continuously variable speed fans direct the
airflow through the amplifier for cooling.

5.2 Advanced Features

5.2.1 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 120V or 240V.

5.2.2 Input Compressor

Prevent input/output overload.

5.2.3 Sleep Circuit

Lowers standby power consumption by shut­ting down the high-voltage supplies during idle
periods.

NOTE: By default, the sleep circuit is not active
on the CTs 600/1200, but may be activated as a
service option.

Operation Manual

page 15

5 Advanced Features
and Options

5.2.4 Input Sensitivity Switches

To access the Input Sensitivity Switches, turn off the amplifier and remove the
PIP2-BBY Input Panel. The switches are in the top surface of the cavity behind the
Input Panel. One 3-position switch per channel selects among these settings: CTs
600/1200: 1.4V (8/4 ohms), 26 dB gain, and 1.4V (70V operation). CTs 2000/
3000: 1.4V (8/4 ohms), 26 dB gain, and 1.4V (70V) / 2V (100V). The Specifications
chapter lists the input sensitivity for the 26 dB gain setting.

Figure 5.1 Input Sensitivity Switches for CTs 600/1200

5.3 Options

T-170V: See Figure 5.3. This is an autoformer that
allows 100V output from the CTs 600/1200, and
allows other amplifiers without direct constant voltage
output to be easily integrated into distributed systems.

TP-170V: See Figure 5.4. This is a rack-mountable
panel with four autoformers as described above.

PIP Modules

Versatile PIP (Programmable Input Processor) mod­ules provide flexible expansion features that can be
added to customize the amplifier. PIP modules plug
into the connector inside the back panel of the ampli­fier. PIP modules are available with features ranging
from error-driven compressor/limiters to crossovers to
remote control and monitoring via IQwic™ or System
Architect software. Your amplifier is a PIP2 amplifier,
which means it can take advantage of the many
advanced features found in PIP2 modules. The CTs
Series 2-channel models do not accept earlier PIP
modules.

Visit the Crown website at www.crownaudio.com, or
contact Crown Customer Service, for descriptions of
available PIP and PIP2 modules.

CTs 2-Channel Power Amplifiers

Figure 5.3 T-170V

Figure 5.4 TP-170V (back view)

page 16

Figure 5.2 Input Sensitivity Switches for CTs 2000/3000

Operation Manual

CTs 2-Channel Power Amplifiers

5 Advanced Features
and Options

5.3.1 Nominal Attenuation Settings

The signal level for each input can be attenuated accurately by
adjusting the 21-step Level Control (see Section 4.3). Figure 5.5
shows the attenuation in dB for each detent. The setting of the
input-sensitivity switch varies the actual attenation as shown.

The accuracy of the attenuation varies with the setting: see
Tolerance (dB).

Detent 26 dB Tolerance (dB) 4/8 ohm or 70/100V

0 (full CW) 0.0 ±1 0.0

10.5±1 0.5

21.0±1 1.5

32.0±1 3.5

43.0±1 5.0

54.0±1 6.5

65.0±1 8.0

76.0±1 9.5

8 7.0 ±1.5 11.0

9 8.0 ±1.5 13.0

10 9.0 ±1.5 14.5

11 10.5 ±1.5 16.0

12 12.0 ±1.5 18.0

13 13.5 ±3 20.0

14 15.0 ±3 22.0

15 18.0 ±3 24.0

16 21.0 ±3 26.0

17 24.0 ±3 30.0

18 36.0 ±6 42.0

19 48.0 ±6 54.0

20 (full CCW) OFF OFF OFF

Operation Manual

Figure 5.5 Attenuation vs. Detent of Level Controls for CTs 2-Channel Amplifiers

page 17

6 Troubleshooting

CTs 2-Channel Power Amplifiers

CONDITION: Power indicator is
off.

POSSIBLE REASON

• The amplifier has lost AC power.

• The amplifier’s Power switch is off.

• The amplifier is not plugged into the
power receptacle.

• 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: Power indicator is
flashing.

POSSIBLE REASON:

• The AC line voltage has dropped below
20% or has risen above 10% of the nomi­nal line voltage of the power supply.

CONDITION: Fault indicator is
flashing.

POSSIBLE REASON:

• The amplifier channel has stopped operat­ing. Refer the unit to an authorized Crown
Service Center.

CONDITION: Distorted sound.

POSSIBLE REASON:

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

• Input is overlaoded by a signal level that is
too high. Turn down your amplifier level
controls, or turn down the input signal, until
the clip light goes out.

Note: If the signal sounds distorted even though
the Clip LED is off, the input signal may be dis­torted before it reaches the amplifier input. Check
gain staging and output levels of the mixer or
preamp.

page 18

CONDITION: Thermal indicator is
on.

POSSIBLE REASON:

• The amplifier is becoming too hot for safe
operation. Allow amplifier to cool. Check
for loads less than 2 ohms, and for
excessive input levels. Check for proper
ventilation and proper mode-switch set­ting.

“Off/Flashing/On” above means that
the LED can be off, or flashing, or on.

Operation Manual

CTs 2-Channel Power Amplifiers

6 Troubleshooting

CONDITION: No sound, even though
the amp has power. Power LED is on with-

out flashing and the amp is receiving an input sig­nal. Signal indicator is flashing.

POSSIBLE REASON:

• Speakers not connected.

• Open circuit due to speaker failure.

• There is a short on the amplifier output. First
disconnect your speakers from the affected
channel(s) one by one to determine if one of
the loads is shorted.

• Ready LED is off. Channel has been set to
standby mode via the control system.

CONDITION: Data indicator not flash­ing, even though PIP module is
installed and host computer control
software is active.

POSSIBLE REASON:

• Cable between computer and PIP module is
broken or not connected.

Note: Data indicator flashes only when the installed
PIP2 module is polled for data, or is polled to see
whether it is online.

CONDITION: Bridge LED is lit.

POSSIBLE REASON:

• Amplifier is in bridge-mono mode.

Operation Manual

CONDITION: No input signal. Signal

indicator is not flashing even though audio is
applied, and the channel is ready..

POSSIBLE REASON:

• Input signal level is very low.

• Level controls are turned down.

“Off/Flashing/On” above means that
the LED can be off, or flashing, or on.

page 19

7 Specifications

Minimum Guaranteed Power
(20 Hz - 20 kHz)

2-ohm Dual (per ch.) 150W 250W 1000W 1500W
4-ohm Dual (per ch.) 300W 600W 1000W 1500W
8-ohm Dual (per ch.) 300W 600W 1000W 1250W
16-ohm Dual (per ch.) 300W 300W 625W 625W
70V Dual (per ch.) 300W 600W 1000W 1500W
100V Dual (per ch.) 300W* 600W* 1000W 1500W
4-ohm Bridge 300W 500W 2000W 3000W
8-ohm Bridge 600W 1200W 2000W 3000W
16-ohm Bridge 600W 1200W 2000W 2500W
100V Bridge 600W* 1200W* 2000W 3000W
140V Bridge 600W 1200W 2000W 3000W
200V Bridge 600W* 1200W* 2000W 3000W

Performance CTs 600 CTs 1200 CTs 2000 CTs 3000

Frequency Response (at 1 watt, 20 Hz - 20 kHz) ± 0.25 dB ± 0.25 dB ± 0.25 dB ± 0.25 dB
Signal to Noise Ratio (ref. rated power, 20 Hz to 20 kHz, A-weighted) < 105 dB < 105 dB < 105 dB < 105 dB
Total Harmonic Distortion (THD) at full rated power, from 20 Hz to 20 kHz < 0.1% < 0.1% < 0.35% < 0.35%
Intermodulation Distortion (IMD) 60 Hz and 7 kHz at 4:1, from –40 dB to

full rated power
Damping Factor:

10 Hz to 100 Hz > 3000 > 3000 > 3000 > 3000
Crosstalk (below rated power)

20 Hz to 1kHz > 80 dB > 80 dB > 80 dB > 80 dB
Common Mode Rejection (CMR) (20 Hz to 1 kHz, typical) 50 dB 50 dB 50 dB 50 dB
DC Output Offset < 2 mV < 2mV < 2 mV < 2 mV
Input Impedance nominally balanced, nominally unbalanced 10 k ohms, 5 k ohms 10 k ohms, 5 k ohms 10 k ohms, 5 k ohms 10 k ohms, 5 k ohms

CTs 2-Channel Power Amplifiers

CTs 600

Power at 0.1% THD

< 0.1% < 0.1% < 0.35% < 0.35%

CTs 1200

Power at 0.1% THD

CTs 2000

Power at 0.35% THD

CTs 3000

Power at 0.35% THD

page 20

* With T-170V or TP-170V.

Operation Manual

CTs 2-Channel Power Amplifiers

7 Specifications

Performance CTs 600 CTs 1200 CTs 2000 CTs 3000

Maximum Input Level
Before input compression
Absolute maximum

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

+20 dBu

+ 32 dBu

2, 4, 8, 16 ohms and 70V

+20 dBu

+ 32 dBu

2, 4, 8, 16 ohms and 70V

+20 dBu

+ 32 dBu

2, 4, 8, 16, 70V,

and 100V

+20 dBu
+ 32 dBu

2, 4, 8, 16, 70V,

and 100V

Bridge Mono

Voltage Gain (at maximum level setting)
8/4 Ohm Operation
26 dB
70V Operation
100V Operation

Input Sensitivity
2/4/8 ohms
70V
100 V
26 dB gain

Required AC Mains (+15%, – 25%) 120V/60 Hz, 230V/50 Hz 120V/60 Hz, 230V/50 Hz 120V/60 Hz, 230V/50 Hz 120V/60 Hz, 230V/50 Hz
Power Draw at Idle (120 VAC mains) 24W (Standby Mode) 24W (Standby Mode) 35W (Standby Mode) 35W (Standby Mode)
Overall Group Delay < 120 usec < 120 usec < 120 usec < 120 usec
Cooling Continuously variable speed

Dimensions
Width
Height
Depth

Net Weight
Shipping Weight

4, 8, 16 and 140V

35:1 (31 dB)
20:1 (26 dB)
50:1 (34 dB)

1.4V

1.4V

4 ohm load: 1.74V.
8 ohm load: 2.46V

forced air, front-to-back airflow

19 in. (48.3 cm.)

3.5 in. (8.9 cm.)

14.25 in. (36.2 cm.)

22.8 lb (10.3 kg),

27.7 lb (12.6 kg)

4, 8, 16 and 140V

50:1 (34 dB)
20:1 (26 dB)
50:1 (34 dB)

1.4V

1.4V

4 ohm load: 2.46V.
8 ohm load: 3.47V

Continuously variable speed

forced air, front-to-back airflow

19 in. (48.3 cm.)

3.5 in. (8.9 cm.)

14.25 in. (36.2 cm.)

23.4 lb (10.6 kg),
2 8 . 3 l b ( 1 2 . 8 k g )

4, 8, 16, 140V , 200V

63.9:1 (36 dB)
20:1 (26 dB)
50:1 (34 dB)
50:1 (34 dB)

1.4V

1.4V

2.0V
4 ohm load: 3.17V.
8 ohm load: 4.48V

Continuously variable speed

forced air, front-to-back airflow

19 in. (48.3 cm.)

3.5 in. (8.9 cm.)

14.25 in. (36.2 cm.)

27.0 lb (12.2 kg)

32.0 lb (14.5 kg)

4, 8, 16, 140V, 200V

71.4:1 (37 dB)
20:1 (26 dB)
50:1 (34 dB)
50:1 (34 dB)

1.4V

1.4V

2.0V
4 ohm load: 3.88V.
8 ohm load: 5.01V

Continuously variable speed

forced air, front-to-back airflow

19 in. (48.3 cm.)

3.5 in. (8.9 cm.)

14.25 in. (36.2 cm.)

27.7 lb (12.6 kg)

32.7 lb (14.8 kg)

Operation Manual

page 21

7 Specifications

CTs 2-Channel Power Amplifiers

page 22

Figure 7.1 CTs 600/1200 Typical Frequency Response (1 W, 8 ohms)

Figure 7.3

CTs 600/1200

Typical Damping Factor

vs. Frequency

Figure 7.2 CTs 600/1200 Typical Crosstalk vs. Frequency

Operation Manual

CTs 2-Channel Power Amplifiers

7 Specifications

Figure 7.4 CTs 2000/3000 Typical Frequency Response (1W)

Operation Manual

Figure 7.5 CTs 2000/3000 Typical Crosstalk vs. Frequency

Figure 7.6

CTs 2000/3000

Typical Damping Factor

vs. Frequency

page 23

8 AC Power Draw and Thermal Dissipation

AC Power Draw and Thermal Dissipation:

Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz.
Typical line impedance used.
Measurements made with 120VAC mains. Line current figures for 230VAC units derived by multiplying 120VAC figures by 0.5.
Data based on all channels driven.

CTs 2-Channel Power Amplifiers

CTs 600

Load

At Idle

1/8th Power Pink Noise 8 Ohms/Ch.

Typical of program material 16 Ohms Bridge
just at clip. 4 Ohms/Ch.

8 Ohms Bridge
2 Ohms/Ch.
4 Ohms Bridge
70V/Ch. 300x2
140/200V Bridge 600

1/3rd Power Pink Noise 8 Ohms/Ch.

Typical of program material 16 Ohms Bridge
with severe clipping. 4 Ohms/Ch.

8 Ohms Bridge
2 Ohms/Ch.
4 Ohms Bridge
70V/Ch. 300x2
140/200V Bridge 600

Rated

Power

300x2
600
300x2
600
150x2
300

300x2
600
300x2
600
150x2
300

Line Current

120VAC

5.8

7.4

7.0

4.2

8.6

11.3

10.8

6.5

Line Current

230VAC

2.9

3.7

3.5

2.1

4.3

5.6

5.4

3.3

Watts

watts in

60 0 60 205 52

461

631

583

336

716

968

964

527

watts out dissapated

78

78

38

75

200

204

102

207

383

554

545

261

516

764

862

320

Thermal Dissipation

Btu/hr kcal/hr

1307

1890

1859

892

1760

2608

2942

1091

330

477

469

225

444

657

742

275

page 24

Operation Manual

CTs 2-Channel Power Amplifiers

8 AC Power Draw and Thermal Dissipation

AC Power Draw and Thermal Dissipation:

Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz.
Typical line impedance used.
Measurements made with 120VAC mains. Line current figures for 230VAC units derived by multiplying 120VAC figures by 0.5.
Data based on all channels driven.

CTs 1200

Load

At Idle

1/8th Power Pink Noise 8 Ohms/Ch.

Typical of program material 16 Ohms Bridge
just at clip. 4 Ohms/Ch.

8 Ohms Bridge
2 Ohms/Ch.
4 Ohms Bridge
100V/Ch. 600x2
140/200V Bridge 1200

1/3rd Power Pink Noise 8 Ohms/Ch.

Typical of program material 16 Ohms Bridge
with severe clipping. 4 Ohms/Ch.

8 Ohms Bridge
2 Ohms/Ch.
4 Ohms Bridge
70V/Ch. 600x2
140/200V Bridge 1200

Rated

Power

600x2
1200
600x2
1200
250x2
500

600x2
1200
600x2
1200
250x2
500

Line Current

120VAC

7.6 3.8 641 157 484 1651 416

10.0 5.0 872 151 720 2458 620

8.8 4.4 1330 405 925 3158 796

7.6 3.8 641 157 484 1651 416

11.5 5.7 996 403 593 2025 511

15.5 7.8 1372 405 967 3300 832

11.5 5.7

Line Current

230VAC

Watts

watts in

60 0 60 205 52

1217 168 1050 358213.4 6.7

996 403 593 2025 511

watts out dissapated

Thermal Dissipation

Btu/hr kcal/hr

903

Operation Manual

page 25

8 AC Power Draw and Thermal Dissipation

AC Power Draw and Thermal Dissipation:

Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz.
Typical line impedance used.
Measurements made with 120VAC mains. Data based on all channels driven.
Line current figures for 230VAC units derived by multiplying 120VAC figures by 0.5.
Line current figures for 100VAC units (not shown) are 1.2 times the line current figures of 120VAC units.
Power draw (”watts in”) of 100VAC units is the same as power draw of 120VAC units.

CTs 2-Channel Power Amplifiers

CTs 2000

Load

At Idle (sleep mode)

1/8th Power Pink Noise 8 Ohms/Ch.

Typical of program material 16 Ohms Bridge
just at clip. 4 Ohms/Ch.

8 Ohms Bridge
2 Ohms/Ch.
4 Ohms Bridge
70/100V/Ch. 1000x2
140/200V Bridge 2000

1/3rd Power Pink Noise 8 Ohms/Ch.

Typical of program material 16 Ohms Bridge
with severe clipping. 4 Ohms/Ch.

8 Ohms Bridge
2 Ohms/Ch.
4 Ohms Bridge
70/100V/Ch. 1000x2
140/200V Bridge 2000

Rated

Power

1000x2
2000
1000x2
2000
1000x2
2000

1000x2
2000
1000x2
2000
1000x2
2000

Line Current

120VAC

6.6 3.3 546 256

7.0 3.5 563 255 307 1049 264

7.2 3.6 602 251

6.7 3.4 639 257 382 1304 329

11.3 5.6 980 676

12.3 6.2 1064 672 392 1338 337

13.7 6.9 1190 705

11.6 5.8 990 674 316 1080 272

Line Current

230VAC

Watts

watts in

40 0 40 137 34

watts out dissapated

290 988 249

351 1198 302

304 1036 261

485 1655 417

Thermal Dissipation

Btu/hr kcal/hr

page 26

Operation Manual

CTs 2-Channel Power Amplifiers

8 AC Power Draw and Thermal Dissipation

AC Power Draw and Thermal Dissipation:

Pink noise 12dB crest factor, bandwidth limited 22Hz to 22kHz.
Typical line impedance used.
Measurements made with 120VAC mains. Data based on all channels driven.
Line current figures for 230VAC units derived by multiplying 120VAC figures by 0.5.
Line current figures for 100VAC units (not shown) are 1.2 times the line current figures of 120VAC units.
Power draw (”watts in”) of 100VAC units is the same as power draw of 120VAC units.

CTs 3000

Load

At Idle (sleep mode)

1/8th Power Pink Noise 8 Ohms/Ch.

Typical of program material 16 Ohms Bridge
just at clip. 4 Ohms/Ch.

8 Ohms Bridge
2 Ohms/Ch.
4 Ohms Bridge
70/100V/Ch. 1000x2
140/200V Bridge 2000

1/3rd Power Pink Noise 8 Ohms/Ch.

Typical of program material 16 Ohms Bridge
with severe clipping. 4 Ohms/Ch.

8 Ohms Bridge
2 Ohms/Ch.
4 Ohms Bridge
70/100V/Ch. 1500x2
140/200V Bridge 3000

Rated

Power

1000x2
2000
1000x2
2000
1000x2
2000

1250x2
2500
1500x2
3000
1500x2
3000

Line Current

120VAC

7.2 3.6 579 313 266 907 229

8.5 4.2 697 381 316 1079 272

9.6 4.8 790 384 405 1384 349

7.2 3.6 579 313 266 907 229

13.7 6.8 1196 835 360 1230 310

16.2 8.1 1469 1010 459 1565 395

19.2 9.6 1686 1024 662 2259 570

13.7 6.8 1196 835 360 1230 310

Line Current

230VAC

Watts

watts in

40 0 40 137 34

watts out dissapated

Thermal Dissipation

Btu/hr kcal/hr

Operation Manual

page 27

9 Service

CTs 2-Channel Power Amplifiers

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

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

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

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

9.1 International and Canada Service

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

Remember to transport your unit in the original factory
pack.

9.2 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.

9.2.1 Service at a US Service Center

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

9.2.2 Factory Service

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

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

800.342.6939 extension 8205.
For warranty service, we will pay for ground shipping

both ways in the United States. Contact Crown Customer
Service to obtain prepaid shipping labels prior to send­ing the unit. Or, if you prefer, you may prepay the cost of
shipping, and Crown will reimburse you. Send copies of
the shipping receipts to Crown to receive reimbursement.
Your repaired unit will be returned via UPS ground.
Please contact us if other arrangements are required.

9.2.3 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.

9.2.4 Packing Instructions

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

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

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

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

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

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

a. 275 P.S.I. burst test, Double-Wall carton that allows

for 2-inch solid Styrofoam on all six sides of unit or
3 inches of plastic bubble wrap on all six sides of
unit.

b. Securely seal the package with an adequate carton

sealing tape.

c. Do not use light boxes or “peanuts”. Damage caused

by poor packaging will not be covered under war­ranty.

Using your 'foam-in-place' shipping pack

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

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

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

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

4. Enclose the completed Crown Audio Factory Service
Information form (or securely attach it to the outside
of carton) and re-seal the shipping pack with a
sturdy carton sealing tape.

9.2.5 Estimate Approval

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

9.2.6 Payment of Non-Warranty Repairs

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

If you have any questions, please contact Crown Factory
Service.

Crown Factory Service

1718 W. Mishawaka Rd.,

Elkhart, Indiana 46517 U.S.A.

Telephone:

574.294.8200

800.342.6939 (North America,

Puerto Rico, and Virgin Islands only)

Facsimile:

574.294.8301 (Technical Support)

574.294.8124 (Factory Service)

Internet:

http://www.crownaudio.com

page 28

Operation Manual

CTs 2-Channel Power Amplifiers

YEAR

3

10 Warranty

UNITED STATES & CANADA

SUMMARY OF WARRANTY

Crown International, 1718 West Mishawaka
Road, Elkhart, Indiana 46517-4095 U.S.A. war­rants to you, the ORIGINAL PURCHASER and
ANY 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.

ITEMS EXCLUDED FROM THIS
CROWN WARRANTY

This Crown Warranty is in effect only for failure of
a new Crown product which occurred within the
Warranty Period. It does not cover any product
which has been damaged because of any inten­tional misuse, accident, negligence, or loss which
is covered under any of your insurance contracts.
This Crown Warranty also does not extend to the
new Crown product if the serial number has been
defaced, altered, or removed.

WHAT THE WARRANTOR WILL DO

We will remedy any defect, regardless of the rea­son for failure (except as excluded), by repair,
replacement, or refund. We may not elect refund
unless you agree, or unless we are unable to pro­vide replacement, and repair is not practical or
cannot be timely made. If a refund is elected,
then you must make the defective or malfunc­tioning product available to us free and clear of
all liens or other encumbrances. The refund will
be equal to the actual purchase price, not includ-

ing interest, insurance, closing costs, and other
finance charges less a reasonable depreciation
on the product from the date of original pur­chase. Warranty work can only be performed at
our authorized service centers or at the factory.
Warranty work for some products can only be
performed at our factory. We will remedy the
defect and ship the product from the service cen­ter or our factory within a reasonable time after
receipt of the defective product at our authorized
service center or our factory. All expenses in
remedying the defect, including surface shipping
costs in the United States, will be borne by us.
(You must bear the expense of shipping the
product between any foreign country and the port
of entry in the United States including the return
shipment, and all taxes, duties, and other cus­toms fees for such foreign shipments.)

HOW TO OBTAIN WARRANTY
SERVICE

You must notify us of your need for warranty ser­vice within the warranty period. All components
must be shipped in a factory pack, which, if
needed, may be obtained from us free of charge.
Corrective action will be taken within a reason­able time of the date of receipt of the defective
product by us or our authorized service center. If
the repairs made by us or our authorized service
center are not satisfactory, notify us or our autho­rized service center immediately.

DISCLAIMER OF CONSEQUENTIAL
AND INCIDENTAL DAMAGES

YOU ARE NOT ENTITLED TO RECOVER FROM
US ANY INCIDENTAL DAMAGES RESULTING

FROM ANY DEFECT IN THE NEW CROWN
PRODUCT. THIS INCLUDES ANY DAMAGE TO
ANOTHER PRODUCT OR PRODUCTS 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.

WARRANTY ALTERATIONS

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

DESIGN CHANGES

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

LEGAL REMEDIES OF PURCHASER

THIS CROWN WARRANTY GIVES YOU SPE­CIFIC LEGAL RIGHTS, YOU MAY ALSO HAVE
OTHER RIGHTS WHICH VARY FROM STATE TO
STATE. No action to enforce this Crown War­ranty shall be commenced after expiration of the
warranty period.

THIS STATEMENT OF WARRANTY SUPERSEDES
ANY OTHERS CONTAINED IN THIS MANUAL
FOR CROWN PRODUCTS 12/01

Operation Manual

page 29

CTs 2-Channel Power Amplifiers

YEAR

3

10 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 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.

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

it for the name “Crown” in this warranty.

ITEMS EXCLUDED FROM THIS
CROWN WARANTY

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.

WORLDWIDE EXCEPT USA & CANADA

WHAT THE WARRANTOR WILL DO

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

HOW TO OBTAIN WARRANTY
SERVICE

You must notify your local Crown importer of
your need for warranty service within the warranty
period. All components must be shipped in the
original box. Corrective action will be taken within
a reasonable time of the date of receipt of the
defective product by our authorized service center.
If the repairs made by our authorized service cen­ter are not satisfactory, notify our authorized ser­vice center immediately.

DISCLAIMER OF CONSEQUENTIAL
AND INCIDENTAL DAMAGES

YOU ARE NOT ENTITLED TO RECOVER FROM US
ANY INCIDENTAL DAMAGES RESULTING FROM
ANY DEFECT IN THE NEW CROWN PRODUCT.
THIS INCLUDES ANY DAMAGE TO ANOTHER
PRODUCT OR PRODUCTS RESULTING FROM
SUCH A DEFECT.

WARRANTY ALTERATIONS

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

DESIGN CHANGES

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

LEGAL REMEDIES OF PURCHASER

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

THIS STATEMENT OF WARRANTY SUPERSEDES
ANY OTHERS CONTAINED IN THIS MANUAL FOR
CROWN PRODUCTS. 7/01

page 30

Operation Manual

CTs 2-Channel 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 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: __________________________________________________________________________

__________________________________________________________________________

__________________________________________________________________________

Operation Manual

page 31