Crown Audio CROWN K User Manual
Operation Manual
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K1
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Obtaining Other Language Versions:
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To obtain information in another language about the use of this product, please contact your
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local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible
situation which may arise during installation, operation or maintenance.
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have
occurred. To obtain the latest version of this manual, please visit the Crown website at www.crownaudio.com.
Trademark Notice:
Crown and Amcron are registered trademarks of Crown International. BCA is a trademark of Crown International.
Other trademarks are the property of their respective owners.
Some models may be exported under the name Amcron.
©2002 by Crown Audio, Inc. P.O. Box 1000, Elkhart, Indiana 46515-1000 U.S.A. Telephone: 574-294-8000
®
K2
102010-6
03/02
Important Safety
Instructions
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 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.
K Series Power Amplifiers
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.
IMPORTANT
K 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.
page 2
Operation Manual
K Series Power Amplifiers
Table of Contents
Important Safety Instructions ................................................2
Table of Contents .................................................................3
1 Welcome ........................................................................4
1.1 Features ..................................................................4
2 How to Use This Manual .............................................4
3 Setup ...............................................................................5
3.1 Unpack Your Amplifier ............................................5
3.2 Install Your Amplifier ...............................................5
3.3 Ensure Proper Cooling ............................................5
3.4 Choose Input Wire and Connectors .........................6
3.5 Choose Output Wire and Connectors ......................6
3.6 Set Up and Wire Your System .................................7
3.6.1 Set the Mode Modes Switches .......................7
3.6.2 Set Input Sensitivity ........................................7
3.6.3 Stereo Mode ...................................................7
3.6.4 Bridge-Mono Mode ........................................7
3.6.5 “Y” Mono Input to Dual Outputs .....................8
3.6.6 “Y” Mono Input to Bridge-Mono Output ........8
3.7 Connect to AC Mains ..............................................9
3.8 Startup Procedure ...................................................9
4 Operation ...................................................................... 9
4.1 Precautions ............................................................. 9
4.2 Front Panel Controls and Indicators ....................... 10
4.3 Back Panel Controls and Connectors ...................... 11
5 Advanced Features and Options .............................. 12
5.1 Protection Systems .................................................. 12
5.1.1. TLC ................................................................ 12
5.1.2 Out-of-band Filtering ......................................12
5.1.3 Inrush Limiting................................................ 12
5.1.4 Fuse
5.2 Advanced Features ................................................... 12
6 Troubleshooting .......................................................... 13
7 Specifications ............................................................... 14
8 Service ........................................................................... 16
8.1 Worldwide Service ................................................... 16
8.2 US and Canada Service ........................................... 16
8.2.1 Service at a US or Canada Service Center ...... 16
8.2.2 Factory Service ............................................... 16
8.2.3 Factory Service Shipping Instructions ............ 16
9 Warranty ........................................................................ 17
Crown Factory Service Information Form ........................... 19
Operation Manual
page 3
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K Series Power Amplifiers
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1 Welcome
Congratulations on purchasing a Crown
K Series amplifier. It is designed to provide very
high power in a lightweight package, without
using a cooling fan. This means your amp runs
quieter (no fan noise) and cleaner (no need for
filters). The K Series amplifiers are very energyefficient as well.
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, the K Series amplifiers include a
number of features which require some explanation before they can be used to their maximum advantage.
Please take the time to study this manual so
that you can obtain the best possible service
from your amplifier.
1.1 Features
• Accurate, uncolored sound with very low
distortion.
• High damping factor for tight, clean bass
response.
• Advanced design for energy conservation.
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• Versatile, handling a wide range of speaker
impedances and outputs.
• Switchable input sensitivity.
• “Soft Start” feature prevents the amplifier
from drawing large currents when it is first
turned on.
• Can be mounted in standard 19-inch
(48.3-cm) rack. Uniquely molded, castaluminum front panel provides exceptional
air circulation.
• Exclusive BCA™ (Balanced Current
Amplifier) power design provides high
efficiency for quiet, fan-free operation.
• Advanced protection circuitry guards
against shorted outputs, open circuits, DC,
mismatched loads, general overheating,
high-frequency overloads and internal
faults.
• Mono mode switches allow you to set up
your amps/speakers in the configuration
that best suits your needs, with combined
amp inputs, combined amp outputs, or
both.
• Patented front-panel design.
• Backed by the industry’s ONLY three-year,
no-fault, fully transferable warranty.
2 How to Use This
Manual
This manual provides you with the necessary
information to safely and correctly set up and
operate your amplifier. It does not cover every
aspect of installation, setup or operation that
might occur under every condition. For additional information, please consult Crown’s
Amplifier Application Guide (available online at
www.crownaudio.com), Crown Technical Support, your system installer or 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 4
Operation Manual
K Series 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. 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
The K Series amplifier is convection cooled and
uses no fan. If ambient temperatures are high,
The TLC indicators may start to illuminate,
showing that the amplifier is becoming hot.
To prevent this, space the amplifiers in the rack,
allowing the top and bottom covers to act as
radiators (Figure 3.2). In extreme conditions,
add fans to direct air onto any surface of the
amplifier.
Operation Manual
Figure 3.2 Spacing the Amplifiers in the Rack
Improves Cooling
Figure 3.1 Dimensions
page 5
3 Setup
K Series Power Amplifiers
3.4 Choose Input Wire
and Connectors
Crown recommends using pre-built or professionally wired, balanced line (two-conductor
plus shield), 22-24 gauge cables and connectors. Use either 3-pin male XLR connectors or
TRS phone 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
Crown recommends using pre-built or professionally wired, high-quality, two-conductor,
heavy gauge speaker wire. Use bare wire, a dual
banana plug or spade lugs on the amplifier end
of each speaker cable (Figure 3.5). To prevent
the possibility of short-circuits, wrap or otherwise insulate exposed loudspeaker cable 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 gauge
26-40 ft. 14 gauge
41-60 ft. 12 gauge
61-100 ft. 10 gauge
101-150 ft. 8 gauge
151-250 ft. 6 gauge
CAUTION: Never use shielded cable for
output wiring.
Figure 3.3 Balanced Input
Connector Wiring
Figure 3.5 Output Connector Wiring
Figure 3.4 Unbalanced Input
Connector Wiring
page 6
Operation Manual
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