Crown D-45, D-75-A Owners manual
D Series
Operation Manual
30
CHANNEL 1 CHANNEL 2
20
40
50
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HEADPHONES POWER
LEVEL
0
SIGNAL
IOC
Obtaining Other Language Versions:
30
20
40
50
10
0
LEVEL
OFF ON
To obtain information in another language about the use of this product, please contact your
local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible
situation which may arise during installation, operation or maintenance.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have
occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.
Trademark Notice:
Crown, Crown Audio, Amcron and IOC are registered trademarks of Crown International. Other trademarks are the
property of their respective owners.
D-45
D-75A
©2006 by Crown Audio
Some models may be exported under the name Amcron.
®
Inc., 1718 W. Mishawaka Rd., Elkhart, Indiana 46517-9439 U.S.A. Telephone: 574-294-8000
®
125243-9
2/06
Important Safety Instructions
D Series Power Amplifiers
IMPORTANT
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) Follow all instructions.
5) Do not use this apparatus near water.
6) Clean only with a dry cloth.
7) Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8) Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
9) Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding-type plug has
two blades and a third grounding prong. The wide blade
or the third prong is provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10) Protect the power cord from being walked on or pinched,
particularly at plugs, convenience receptacles, and the
point where they exit from the apparatus.
11) Only use attachments/accessories specified by the manufacturer.
12) Use only with a cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus.
When a cart is used, use caution when moving the cart/
apparatus combination to avoid injury from tip-over.
13) Unplug this apparatus during lightning storms or when
unused for long periods of time.
14) Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in
any way, such as power-supply cord or plug is damaged,
liquid has been spilled or objects have fallen into the
apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been
dropped.
15) WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN
OR MOISTURE.
16) DO NOT EXPOSE TO DRIPPING OR SPLASHING. DO
NOT PLACE OBJECTS FILLED WITH LIQUID, SUCH AS
VASES, ON THIS APPARATUS.
TO COMPLETELY DISCONNECT THIS EQUIPMENT FROM
THE AC MAINS, DISCONNECT THE POWER SUPPLY CORD
PLUG FROM THE AC RECEPTACLE. THE MAINS PLUG OF
THE POWER SUPPLY CORD SHALL REMAIN READILY
OPERABLE.
POUR DÉMONTER COMPLÈTEMENT L'ÉQUIPEMENT DE
L'ALIMENTATION GÉNÉRALE, DÉMONTER LE CÂBLE D'ALIMENTATION DE SON RÉCEPTACLE. LA PRISE D'ALIMENTATION RESTERA AISÉMENT FONCTIONNELLE.
PARA DESCONECTAR COMPLETAMENTE EL EQUIPO DEL
SUMINSTRO ELECTRICO, DESCONECTE EL CABLE DE ALIMENTACION DE LA TOMA DE CA. LAS PATAS DEL CONECTOR DEL CABLE DE ALIMENTACIÓN DEBERAN
MANTENERSE EN BUEN ESTADO.
TO PREVENT ELECTRIC SHOCK DO NOT REMOVE TOP OR
BOTTOM COVERS. NO USER SER VICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
À PRÉVENIR LE CHOC ÉLECTRIQUE N’ENLEVEZ PAS LES
COUVERCLES. IL N’Y A PAS DES PARTIES SERVICEABLE À
L’INTÉRIEUR. TOUS REPARATIONS DOIT ETRE FAIRE PAR
PERSONNEL QUALIFIÉ SEULMENT.
PARA PREVENIR UN CHOQUE ELÉCTRICO, NO RETIRE LAS
CUBIERTAS SUPERIOR O INFERIOR. NO EXISTEN PARTES
QUE PUEDAN SER REPARADAS POR EL USUARIO AL INTERIOR. REMITA EL SERVICICO AL PERSONAL TÉCHNICAL
CALIFICADO.
WATCH FOR THESE SYMBOLS:
The lightning bolt triangle is used to alert the user to the risk
of electric shock.
The exclamation point triangle is used to alert the user to
important operating or maintenance instructions.
REGARDEZ CES SYMBOLES
La triangle avec le sigle ‘’foudre’’ est employée pour alerter
l'utilisateur au risque de décharge électrique. Le triangle avec
un point d'exclamation est employée pour alerter l'utilisateur
d’instruction importantes pour lors opérations de maintenance.
ATENCION CON ESTOS SÍMBOLOS
El triángulo con el símbolo de rayo eléctrico es usado para
alertar al usuario de el riesgo de un choque eléctrico.
El triángulo con el signo de admiración es usado para alertar
al usuario de instrucciones importantes de operación o mantenimiento.
D Series amplifiers require Class 2 output wiring.
Les amplificateurs de série de D exigent des câbles de sortie de
classe 2.
D-Reihe-Verstärker verlangen Klasse die 2 Produktionsverdrahtung.
Los amplificadores de la Serie D requieren de un cableado de salida
Clase 2.
MAGNETIC FIELD
CAUTION! Do not locate sensitive high-gain equipment such as
preamplifiers or tape decks directly above or below the unit.
Because this amplifier has a high power density, it has a strong
magnetic field which can induce hum into unshielded devices that
are located nearby. The field is strongest just above and below the
unit.
If an equipment rack is used, we recommend locating the amplifier(s) in the bottom of the rack and the preamplifier or other sensitive equipment at the top.
FCC COMPLIANCE NOTICE
This device complies with part 15 of the FCC rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
CAUTION: Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instruction manual, may cause harmful interference to
radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
page 2
Operation Manual
D Series Power Amplifiers
Crown International, Inc.
Issued By: Crown International, Inc.
1718 W. Mishawaka Road
Elkhart, Indiana 46517 U.S.A.
European Representative's Name and Address:
Nick Owen
35, Bassets Field
Thornhill
Cardiff. South Glamorgen
CF14 9UG United Kingdom
Equipment Type: Commercial Audio Power Amplifiers
Family Name: D Family
Model Names: D-45, D-75A
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 20 cm
EN 61000-3-2:2001 Limits for Harmonic Current Emissions (equipment input current less than or equal to 16 A per phase)
EN 61000-3-3:2002 Limitation of Voltage Fluctuations and Flicker in Low-Voltage Supply Systems Rated Current less than or equal to16A
EN 55022:2003 Limits and Methods of Measurement of Radio Disturbance Characteristics of ITE: Radiated, Class B Limits; Conducted, Class A
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 61000-4-2:2001 Electrostatic Discharge Immunity (Environment E2-Criteria B, 4k V Contact, 8k V Air Discharge)
EN 61000-4-3:2001 Radiated, Radio-Frequency, Electromagnetic Immunity (Environment E2, criteria A)
EN 61000-4-4:2001 Electrical Fast Transient/Burst Immunity (Criteria B)
EN 61000-4-5:2001 Surge Immunity (Criteria B)
EN 61000-4-6:2003 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 7th Ed. Safety Requirements - Audio Video and Similar Electronic Apparatus
I certify that the product identified above conforms to the requirements of the EMC Council Directive 89/336/EEC as amended by 92/31/EEC, and the Low Voltage Directive 73/23/EES as amended by 93/68/EEC.
Signed
Larry Coburn
Title: Senior Vice President of Manufacturing
DECLARATION of CONFORMITY
COMPLIANCE QUESTIONS ONLY:
Sue Whitfield
574-294-8289
swhitfield@crownintl.com
Date of Issue: Jan. 1, 2006
Operation Manual
DUE TO LINE CURRENT HARMONICS, WE RECOMMEND THAT YOU CONTACT YOUR SUPPLY AUTHORITY BEFORE CONNECTION.
page 3
Table of Contents
D Series Power Amplifiers
Important Safety Instructions .......................................................2
Declaration of Conformity ............................................................3
1 Welcome ..................................................... 5
1.1 Features ...........................................................................5
1.2 How to Use This Manual ..................................................5
2 Setup ......................................................... 6
2.1 Unpack Your Amplifier......................................................6
2.2 Install Your Amplifier .......................................................6
2.3 Ensure Proper Cooling ....................................................6
2.4 Choose Input Wire and Connectors .................................7
2.5 Choose Output Wire and Connectors ...............................7
2.6 Wire Your System ............................................................8
2.6.1 Dual Mode ..............................................................8
2.6.2 Bridge-Mono Mode ................................................8
2.7 Connect to AC Mains .......................................................9
2.7.1 AC Mains Voltage Configuration ............................9
2.8 Startup Procedure ............................................................9
3 Operation .................................................... 10
3.1 Precautions ......................................................................10
3.2 Controls, Indicators and Connectors ...............................11
3.3 Indicators .........................................................................12
3.4 Controls ..........................................................................12
3.5 Fuse Replacement ...........................................................12
4 Advanced Features and Options ......................... 13
4.1 Protection .......................................................................13
4.2 Options ...........................................................................13
4.2.1 Bridge-Mono Option ..............................................13
4.2.2 Input-Sensitivity Option ..........................................13
5 Troubleshooting ............................................ 14
6 Specifications .............................................. 15
7 Service ....................................................... 17
7.1 International and Canada Service ....................................17
7.2 US Service .......................................................................17
7.2.1 Service at a US Service Center ...............................17
7.2.2 Factory Service .......................................................17
7.2.3 Factory Service Shipping Instructions.....................17
7.2.4 Packing Instructions................................................17
7.2.5 Estimate Approval....................................................17
7.2.6 Payment of Non-Warranty Repairs...........................17
8 Warranty ..................................................... 18
Product Registration.....................................................................21
Crown Factory Service Information Form ....................................23
page 4
Operation Manual
D Series Power Amplifiers
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SIGNAL
1 Welcome
Reliability is the first thing you get with your
purchase of a Crown
45 and D-75A both deliver dependable operation with a wide variety of loads. Because of
their exceptional reliability, these amplifiers
have become the leading choice of professionals for use in recording studios, laboratories
and public facilities. You can even find them on
the road. Their sonic excellence also makes
them a very good choice for your personal listening pleasure.
The D-45 and D-75A amplifiers are compact
and provide ultra-low distortion for medium
power applications. Crown’s advanced AB+B
circuitry ensures efficient operation and protects against shorted, open, mismatched or
low-impedance loads that can affect any amplifier’s performance.
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, D Series amplifiers include a number of features which require some explanation
before they can be used to their maximum
®
power amplifier. The D-
30
20
40
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10
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Please take the time to study this manual so
that you can obtain the best possible service
from your amplifier.
1.1 Features
Your dual-channel (stereo) amplifier can
optionally be configured to deliver double the
power from a single (mono) channel. It also
provides the following features:
• Powerful AB+B class circuitry yields maximum efficiency with minimum crossover
“notch” distortion.
®
• IOC
(Input/Output Comparator) alerts of
any distortion that exceeds 0.05% to provide proof of distortion-free performance.
• Signal presence indicators verify the presence of amplifier output.
• Detented level controls for precise repeatability.
• Ultra-low harmonic and intermodulation
distortion result in the best dynamic transfer function in the industry.
OFF ON
• Mounts in a standard 19-inch (48.3-cm)
rack.
• Front-panel headphone jack.
• Three Year, No-Fault, Fully-Transferable
Warranty completely protects your investment and guarantees its specifications.
1.2 How to Use This Manual
This manual provides you with the necessary
information to safely and correctly setup and
operate your amplifier. It does not cover every
aspect of installation, setup or operation that
might occur under every condition. For additional information, please consult Crown’s
Amplifier Application Guide (available online at
www.crownaudio.com), Crown Technical Support, your system installer or retailer.
We strongly recommend you read all instructions, warnings and cautions contained in this
manual. Also, for your protection, please send
in your warranty registration card today. And
save your bill of sale — it’s your official proof
of purchase.
• Very low noise and wide dynamic range.
• High damping factor provides exceptional
loudspeaker motion control.
• Convection cooling system eliminates fan
noise and maintenance.
advantage.
Operation Manual
page 5
2 Setup
D Series Power Amplifiers
2.1 Unpack Your Amplifier
Please unpack and inspect your amplifier for any
damage that may have occurred during transit. If
damage is found, notify the transportation company
immediately. Only you can initiate a claim for shipping damage. Crown will be happy to help as
needed. Save the shipping carton as evidence of
damage for the shipper’s inspection.
We also recommend that you save all packing materials so you will have them if you ever need to transport the unit. Never ship the unit without the
factory pack.
YOU WILL NEED (not supplied):
• Input wiring cables
• Output wiring cables
Rack for mounting amplifier (or a stable surface for
stacking)
WARNING: Before you start to set up your
amplifier, make sure you read and observe
the Important Safety Instructions found at
the beginning of this
manual.
2.2 Install Your Amplifier
CAUTION: Before you begin, make sure your
amplifier is disconnected from the power
source, with the power switch in the “off”
position and all level controls turned completely down (counterclockwise).
Use a standard 19-inch (48.3 cm) equipment rack
(EIA RS-310B). See Figure 2.1 for amplifier dimensions.
You may also stack amps without using a
cabinet.
NOTE: When transporting, amplifiers should be
supported at the front.
2.3 Ensure Proper Cooling
When using an equipment rack, do not mount units
directly on top of each other. Allow some air space
between units for convection cooling. The side
walls of the rack should be a minimum of two
inches (5.1 cm) away from the amplifier sides, and
the back of the rack should be a minimum of four
inches (10.2 cm) from the amplifier back panel.
Figure 2.2 illustrates D Series amplifier
installation.
page 6
Figure 2.2 Installation
Figure 2.1 D-45 and D-75A Dimensions
Operation Manual
D Series Power Amplifiers
2 Setup
2.4 Choose Input Wire
and Connectors
Figure 2.3 shows connector pin assignments for
balanced wiring, and Figure 2.4 shows connector pin assignments for unbalanced wiring.
NOTE: Custom wiring should only be performed by qualified personnel.
2.5 Choose Output Wire and
Connectors
Crown recommends using professionally constructed, highquality, two- or four-conductor, heavy gauge
speaker wire and connectors. You may use terminal forks or bare wire for your output connectors (see Figure 2.5). To prevent the possibility
of short-circuits, wrap or otherwise insulate
exposed loudspeaker cable and connectors.
Using the guidelines below, select the appropriate size of wire based on the distance from
amplifier to speaker.
Distance Wire Size
up to 25 ft. 16 AWG
26-40 ft. 14 AWG
41-60 ft. 12 AWG
Over 60 ft. 10 AWG
CAUTION: Never use shielded cable for
output wiring.
Figure 2.3 Balanced
Input Connector
Wiring
Figure 2.4 Unbalanced
Input Connector
Wiring
Figure 2.5 Output Connector Wiring
Operation Manual
page 7
2 Setup
2.6 Wire Your System
2.6.1 Dual Mode
Typical input and output wiring is shown in Figure 2.5.
INPUTS: Connect input wiring for each channel.
OUTPUTS: Maintain proper polarity (+/-) on output connec-
tors.
Connect Channel 1 positive (+) speaker load to Channel 1
positive terminal of amp; repeat for negative (-). Repeat each
channel wiring as for Channel 1. Refer to Section 2.5 for output connector pin assignments.
2.6.2 Bridge-Mono Mode
Your amplifier is factory-configured for dual (stereo) operation. As an option, the unit can be configured for higher
power, single-channel, bridge-mono mode by an authorized
Crown Service Center. To prevent damage to the
amplifier, do not operate the unit in bridge-mono
mode without the Service Center modification.
Typical input and output wiring is shown in Figure 2.7.
INPUTS: Connect input wiring only to CH 1.
OUTPUTS: Connect the speaker across the positive output
terminals. Do not use the negative terminals when the amplifier is being operated in Bridge-Mono mode.
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 CH 2 level control. The CH 1
level control works both channels.
If your loudspeakers don’t need the additional voltage, and you only have one input signal to drive multiple loudspeakers, you can use bridge-mono mode
without actually bridging the outputs. Bridge-mono
mode is like dual mode except the channel 1 input
feeds both outputs, and the channel 2 output is
inverted. To use bridge-mono mode without bridging
the outputs, wire your loudspeakers as you would for
dual mode, but invert the polarity of the channel 2
output wiring (positive goes to negative, and negative
goes to positive).
D Series Power Amplifiers
Figure 2.6
System Wiring
for Dual Mode
Do not wire the amplifier in bridge-mono
mode without having it modified by an
authorized Crown Service Center.
Figure 2.7
System Wiring
for Bridge-Mono
Mode
page 8
Operation Manual
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