Crown Audio Stereo Amplifier CROWN K Series User Manual

K Series  
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Operation Manual  
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Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your  
local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000.  
This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible  
situation which may arise during installation, operation or maintenance.  
The information provided in this manual was deemed accurate as of the publication date. However, updates to this information may have  
Trademark Notice: 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  
102010-6  
03/02  
 
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  
 
K Series Power Amplifiers  
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IOC  
Enable  
B
B
A
A
L
L
A
A
N
N
C
C
E
E
D
D
C
C
U
U
R
R
R
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E
E
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N
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1 Welcome  
2 How to Use This  
Manual  
Versatile, handling a wide range of speaker  
impedances and outputs.  
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 energy-  
efficient as well.  
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 addi-  
tional information, please consult Crown’s  
Amplifier Application Guide (available online at  
port, your system installer or retailer.  
Switchable input sensitivity.  
“Soft Start” feature prevents the amplifier  
from drawing large currents when it is first  
turned on.  
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.  
Can be mounted in standard 19-inch  
(48.3-cm) rack. Uniquely molded, cast-  
aluminum front panel provides exceptional  
air circulation.  
We strongly recommend you read all instruc-  
tions, 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.  
Exclusive BCA™ (Balanced Current  
Amplifier) power design provides high  
efficiency for quiet, fan-free operation.  
In addition, the K Series amplifiers include a  
number of features which require some expla-  
nation before they can be used to their maxi-  
mum advantage.  
Advanced protection circuitry guards  
against shorted outputs, open circuits, DC,  
mismatched loads, general overheating,  
high-frequency overloads and internal  
faults.  
Please take the time to study this manual so  
that you can obtain the best possible service  
from your amplifier.  
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.  
1.1 Features  
Accurate, uncolored sound with very low  
distortion.  
High damping factor for tight, clean bass  
response.  
Patented front-panel design.  
Backed by the industry’s ONLY three-year,  
no-fault, fully transferable warranty.  
Advanced design for energy conservation.  
page 4  
Operation Manual  
 
K Series Power Amplifiers  
3 Setup  
3.3 Ensure Proper Cooling  
3.2 Install Your Amplifier  
3.1 Unpack Your Amplifier  
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.  
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 (counterclock-  
wise).  
Please unpack and inspect your amplifier for  
any damage that may have occurred during  
transit. If damage is found, notify the transpor-  
tation company immediately. Only you can ini-  
tiate a claim for shipping damage. Crown will  
be happy to help. Save the shipping carton as  
evidence of damage for the shipper’s inspec-  
tion.  
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.  
Use a standard 19-inch (48.3 cm) equipment  
rack. See Figure 3.1 for amplifier dimensions.  
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 may also stack amps without using a cabi-  
net.  
NOTE: When transporting, amplifiers should be  
supported at both front and back.  
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 Instruc-  
tions found at the beginning of this  
manual.  
Figure 3.2 Spacing the Amplifiers in the Rack  
Improves Cooling  
Figure 3.1 Dimensions  
Operation Manual  
page 5  
 
 
K Series Power Amplifiers  
3 Setup  
3.4 Choose Input Wire  
and Connectors  
Crown recommends using pre-built or profes-  
sionally wired, balanced line (two-conductor  
plus shield), 22-24 gauge cables and connec-  
tors. 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 connec-  
tor pin assignments for unbalanced wiring.  
NOTE: Custom wiring should only be per-  
formed by qualified personnel.  
Figure 3.4 Unbalanced Input  
Connector Wiring  
Figure 3.3 Balanced Input  
Connector Wiring  
3.5 Choose Output Wire and Con-  
nectors  
Crown recommends using pre-built or profes-  
sionally 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 other-  
wise insulate exposed loudspeaker cable con-  
nectors.  
Using the guidelines below, select the appropri-  
ate size of wire based on the distance from  
amplifier to speaker.  
Distance  
up to 25 ft.  
26-40 ft.  
Wire Size  
16 gauge  
14 gauge  
12 gauge  
10 gauge  
8 gauge  
41-60 ft.  
61-100 ft.  
101-150 ft.  
151-250 ft.  
6 gauge  
Figure 3.5 Output Connector Wiring  
CAUTION: Never use shielded cable for  
output wiring.  
page 6  
Operation Manual  
 
   
K Series Power Amplifiers  
Figure 3.8  
Stereo Wiring  
Stereo Inputs  
3 Setup  
:
,
Stereo Output  
to Speakers  
3.6.2 Set Input Sensitivity  
3.6 Set Up and Wire Your System  
Set the Input Sensitivity switches of each chan-  
nel to the desired setting (see Figure 3.7). Two  
choices are available: 1.4V for full rated output  
(33 dB gain), or a fixed voltage gain of 26 dB.  
First, turn down the Level controls (fully coun-  
terclockwise) and turn off the amplifier.  
3.6.1 Set the Mono Modes Switches  
To run in Stereo Mode: On the back panel, set  
the Bridge Output switch and the “Y” Input  
switch OFF.  
CH 2  
CH 1  
Figure 3.7 Input Sensitivity Switch  
3.6.3 Stereo Mode  
Figure 3.6 Mono Modes Switches  
See Figure 3.8.  
If you want to give up stereo capabilities in order  
to drive your speakers louder, set the Bridge Out-  
put switch to ON. Then a single input will feed a  
single output with twice the voltage of stereo  
mode. You might use this configuration if you  
are running a distributed sound system from the  
K Series amp.  
INPUTS: Connect input wiring to both channels.  
OUTPUTS: Maintain proper polarity (+/–) on  
output connectors.  
Connect Channel 1 positive (+) speaker load to  
Channel 1 positive terminal of amp; repeat for  
negative (–). Repeat Channel 2 wiring as for  
Channel 1.  
Figure 3.9  
Bridge-Mono  
Wiring:  
Mono or Stereo In,  
Mono Out  
If you want to feed a mono audio signal to two  
channels, each with its own level control, set the  
“Y” Input switch ON. This connects both inputs  
in parallel. You might use this setup if you’re  
running a monitor speaker on one channel and a  
main speakers stack on the other channel, and  
you want to feed them the same signal.  
3.6.4 Bridge-Mono Mode  
See Figure 3.9.  
Use this configuration if you want to give up  
stereo capabilities in order to drive your speak-  
ers louder.  
If you want daisy-chained inputs fed to a double-  
voltage output, set the Bridge Output switch ON  
and the “Y” Input switch ON. For example, con-  
nect the input signal to the CH-1 XLR connector  
and use the CH-2 XLR connector plus the two  
1/4-inch phone jacks for daisy-chained outputs  
that feed other power amplifiers.  
On the back panel, set the Bridge Output switch  
ON.  
CH 1  
INPUTS: Connect input wiring to Channel 1  
only.  
OUTPUTS: Connect the speaker across the posi-  
tive terminals of each channel. Do not use the  
negative terminals (black binding posts)  
when the amp is being operated in  
Bridge-Mono mode.  
NOTE: The Channel 2 level control should  
be set fully counter-clockwise when oper-  
ating the amplifier in Bridge-Mono mode.  
Operation Manual  
page 7  
 
K Series Power Amplifiers  
3.6.5 “Y” Mono Input to Dual  
Outputs  
If you want to feed a mono audio signal to two  
channels, each with its own level control, set  
the “Y” Input switch ON. This connects both  
inputs in parallel. You might use this setup if  
you’re running a monitor speaker on one chan-  
nel and a main speakers stack on the other  
channel, and you want to feed them the same  
signal.  
Figure 3.10  
Wiring for “Y” Mono Input,  
Dual Output  
CH 2  
CH 1  
See Figure 3.10.  
INPUTS: Connect input wiring to one channel.  
OUTPUTS: Maintain proper polarity (+/-) on  
output connectors.  
Connect Channel 1 positive (+) speaker load to  
Channel 1 positive terminal of amp; repeat for  
negative (-). Repeat Channel 2 wiring as for  
Channel 1.  
3.6.6 “Y” Mono Input to Bridge-  
Mono Output  
If you want daisy-chained inputs fed to a dou-  
ble-voltage output, set the Bridge Output switch  
ON and the “Y” Input switch ON.  
See Figure 3.11.  
For example, connect the input signal to the  
CH-1 XLR connector and use the CH-2 XLR  
connector plus the two 1/4-inch phone jacks  
for daisy-chained outputs that feed other power  
amplifiers.  
Figure 3.11  
Wiring for “Y” Mono Input ,  
Bridge-Mono Output  
CH 2  
CH 1  
NOTE: Crown provides a reference of wiring pin  
assignments for commonly used connector  
types in the Crown Amplifier Application Guide  
page 8  
Operation Manual  
 
K Series Power Amplifiers  
3 Setup  
4 Operation  
3.7 Connect to AC Mains  
4.1 Precautions  
Connect your amplifier's power cord to the AC  
mains power source (power outlet).  
Your amplifier is protected from internal and  
external faults, but you should still take the fol-  
lowing precautions for optimum performance  
and safety:  
WARNING: The third prong of this con-  
nector (ground) is an important safety  
feature. Do not attempt to disable this  
ground connection by using an adapter  
or other methods.  
1. Before use, your amplifier must be config-  
ured for proper operation as described in the  
Setup section of this manual. Improper wiring  
can result in serious operating difficulties. For  
advanced setup techniques, consult Crown's  
Amplifier Application Guide available online at  
Amplifiers don't create energy. The AC mains  
voltage and current must be sufficient to deliver  
the power you expect. You must operate your  
amplifier from an AC mains power source with  
not more than 10% variation above or below  
the amplifier's specified line voltage and within  
the specified frequency requirements (indicated  
on the amplifier's back panel label). If you are  
unsure of the output voltage of your AC mains,  
please consult your electrician.  
2. Use care when making connections, select-  
ing 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.  
3.8 Startup Procedure  
4. Never connect the output to a power supply,  
battery or power main. Electrical shock may  
result.  
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.  
5. Tampering with the circuitry, or making  
unauthorized circuit changes may be hazardous  
and invalidates all agency listings.  
3. Turn on the Power switch. The Enable indica-  
tor next to the Power switch should glow.  
6. Do not operate the amplifier with the Clip  
LED constantly flashing.  
4. Turn up the level of your audio source to an  
optimum level.  
7. Do not overdrive the mixer, which will cause  
clipped signal to be sent to the amplifier. Such  
signals will be reproduced with extreme accu-  
racy, and loudspeaker damage may result.  
5. Turn up the Level controls on the amplifier  
until the desired loudness or power level is  
achieved.  
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 dam-  
age.  
6.Turn down the level of your audio source to  
its normal range.  
If you ever need to make any wiring or installa-  
tion changes, don't forget to disconnect  
the power cord.  
Crown is not liable for damage that results from  
overdriving other system components.  
For help with determining your system's opti-  
mum gain structure (signal levels) please refer  
to the Crown Amplifier Application Guide,  
page 9  
Operation Manual  
 
K Series Power Amplifiers  
4 Operation  
quick start-up test. Then the Enable indicator  
will turn on to its full brightness. If no signal is  
present, the Enable indicator will switch to a  
dimmer green.  
4.2 Front Panel Controls and  
Indicators  
begin to protect itself with its TLC protection  
system by subtly and dynamically reducing the  
gain as needed. The TLC indicators gradually  
turn brighter as the TLC protection becomes  
greater.  
Figure 4.1 below points out the controls, indi-  
cators and connectors on the front panel of the  
K Series amplifiers. The K1 and K2 look identi-  
cal except for product nameplates and fuse  
specifications.  
D.Power Switch  
Clip: Turns on when distortion becomes audi-  
ble in the amplifier output.  
Amplifier is on when the top half of the switch  
is depressed.  
A. Level Controls  
IOC: The yellow Input /Output Comparator  
indicators turn on when distortion reaches  
0.05%, which is well before the distortion is  
audible.  
The Level controls, one per channel, adjust the  
input attenuation from 0 dB to 100 dB.  
B. Indicators  
Signal: The green Signal indicators flash  
dimly when a very low-level signal (as low as  
10 mW) is present in the output. They flash  
brightly when a louder signal (at least 1 watt) is  
present at the output.  
Figure 4.2 shows a closep view of the indicator  
LEDs (4 per channel).  
TLC: The TLC (thermal level control) indicators  
turn on with a dim glow a little before the  
amplifier needs help dissipating heat. This  
forewarning gives you a chance to turn on a fan  
or other auxiliary cooling (if available), or turn  
down the level controls of the amplifier. If you  
do neither, the amplifier will automatically  
C. Enable Indicator  
The green Enable indicator turns on when the  
amplifier has been turned on and has power.  
When first turned on, there will be a  
2-second delay while the amplifier performs a  
Figure 4.2 Front Panel Indicators  
Figure 4.1 Front and Back Panel Controls, Indicators and Connectors  
page 10  
Operation Manual  
 
K Series Power Amplifiers  
4 Operation  
J. Power Fuse  
input signals of both channels together, in par-  
allel. To operate in dual mode, set this switch to  
OFF. See Section 3.6.1 for more detail.  
4.3 Back Panel Controls and  
Connectors  
Figure 4.3 below points out the controls and  
connectors on the back panel of the K Series  
amplifiers. The K1 and K2 look identical except  
for product nameplates and fuse specifications.  
This fuse protects the high-voltage power  
supply.  
G. XLR-type Input Connector  
K. Power Cord  
This is a female XLR-type connector, one per  
channel, that accepts a balanced or unbalanced  
input signal. See Section 3.4 for pin assign-  
ments.  
This permanently attached cable conducts the  
AC mains electricity to the amplifer.  
E. Bridge Output Switch  
L. Output Connectors  
This switch selects whether or not the output  
signal is bridged across the two channels. To  
operate the amplifier in bridge-mono mode, set  
this switch to ON. To operate the amplifier in  
dual mode, set this switch to OFF. See Section  
3.6.1 for more detail.  
H. Input Sensitivity Switch  
These 5-way binding-post connectors (one pair  
per channel) provide the amplifier output signal  
for connection to loudspeakers. The load can  
be connected in stereo (one load per channel)  
or in bridge mono (one load across the positive  
terminals of both channels). When using  
bridge-mono mode, be sure to set the Bridge  
Output switch to ON. See Sections 3.6.3 and  
3.6.4 for details.  
This switch selects between1.4V sensitivity or  
26 dB gain. See Section 3.6.2 for more detail.  
I. Phone Jack Input Connector  
This is a 1/4-inch phone jack connector, one  
per channel, that accepts a balanced or unbal-  
anced input signal. See Section 3.4 for terminal  
assignments.  
F. Y” Input Switch  
If you want to feed a mono audio signal to two  
channels, each with its own level control, set  
the “Y” Input switch to ON. This connects the  
Figure 4.3 Back Panel Controls and Connectors  
Operation Manual  
page 11  
 
K Series Power Amplifiers  
5 Advanced Features  
NOTE: For detailed information about these Crown  
amplifier features, please consult the Crown Amplifier  
Application Guide, available on the Crown website at  
5.2 Advanced Features  
BCA (Balanced Current Amplifier) technology allows high  
levels of power output without all the associated heat found  
in a conventional amplfifier. This highly efficient design  
works without using a cooling fan.  
5.1 Protection Systems  
Accurate, uncolored sound with very low distortion.  
High damping factor for tight, clean bass response.  
Advanced design for energy conservation.  
Your Crown amplifier provides extensive protection sys-  
tems, including protection against shorted outputs, open  
circuits, DC, mismatched loads, general overheating,  
high-frequency overloads and internal faults.  
Versatile, handling a wide range of speaker impedances and  
outputs.  
5.1.1 TLC  
If the amplifier starts to overheat, the thermal level con-  
trol system will subtly and dynamically reduce the gain as  
needed. Transformer overheating (extremely unlikely)  
will result in a temporary shutdown. When the amplifier  
has cooled to a safe temperature, the transformer will  
automatically reset itself.  
Switchable input sensitivity.  
“Soft Start” feature prevents the amplifier from drawing large  
currents whenit is first turned on.  
Can be mounted in standard 19-inch (48.3-cm) rack.  
Uniquely molded, cast-aluminum front panel provides  
exceptional air circulation.  
5.1.2 Out-of-band Filtering  
An 8-Hz high-pass filter protects the amplifier and loads  
from subsonic frequencies. A 30 kHz low-pass filter  
offers protection from ultrasonic frequencies.  
Advanced protection circuitry guards against shorted out-  
puts, open circuits, DC, mismatched loads, general over-  
heating, high-frequency overloads and internal faults.  
5.1.3 Inrush Limiting  
Mono mode switches allow you to set up your amps/speak-  
ers in the configuration that best suits your needs, with  
combined amp inputs, combined amp outputs, or both.  
The “soft-start” feature prevents the amplifier from draw-  
ing a large inrush current when it is first turned on.  
Backed by the industry’s ONLY three-year, no-fault, fully  
transferable warranty.  
5.1.4 Fuse  
A fuse is provided to protect the power supplies from  
excess current. It is located on the back panel below the  
power cord.  
K-Series amplifiers that are configured to use 100-120  
VAC power should use the following fuses:  
K2: 20-amp fuse  
K1: 15-amp fuse.  
K-Series amplifiers that are configured to use 200-250  
VAC should use the following fuses:  
K2: 10-amp fuse.  
K1: 8-amp fuse.  
page 12  
Operation Manual  
 
K Series Power Amplifiers  
6 Troubleshooting  
CONDITION: No power to the  
amplifier.  
CONDITION: Input signal but no sound.  
POSSIBLE REASON:  
POSSIBLE REASON:  
The amplifier has just been turned on and  
is still in the 4-second turn-on delay.  
The amplifier's Power switch is off.  
The amplifier is not plugged into the  
power receptacle.  
Speakers not connected.  
The amplifier's low-voltage power supply  
fuse has blown. Return amp to Crown or  
an authorized Crown Service Center for  
servicing.  
CONDITION: No input signal.  
POSSIBLE REASON:  
Input signal level is very low.  
Level controls are turned down.  
Input cables are not connected.  
CONDITION: Distorted sound.  
POSSIBLE REASON:  
Input signal level is too high. Turn down  
your amplifier level controls. NOTE: Your  
amplifier should never be operated at a  
level which causes the Clip LED to flash  
constantly.  
CONDITION: TLC indicator glows brightly.  
POSSIBLE REASON:  
Load is wired incorrectly or Bridge Mono  
Switch is set incorrectly. Check both.  
The amplifier is protecting itself with the  
thermal level control system. Turn on a  
fan or turn down the level controls.  
Note: If sound is distorted but clip LED is not  
flashing, check mixer levels and gain staging,  
mixer clip lights, and pads built into micro-  
phones.  
Operation Manual  
page 13  
 
K Series Power Amplifiers  
7 Specifications  
Minimum Guaranteed Power  
K1  
K2  
120 VAC, 60 Hz Units, Stereo mode, per channel, both channels driven  
1 kHz with 0.1% THD  
Stereo, 2 ohms per ch.  
Stereo, 4 ohms per ch.  
Stereo, 8 ohms per ch.  
750W  
550W  
350W  
1,250W  
800W  
500W  
120 VAC, 60 Hz Units, Bridge mono mode  
1 kHz with 0.1% THD  
4 ohms  
1,500W  
K1  
2,500W  
K2  
Performance  
Frequency Response (at 1 watt, 20 Hz - 20 kHz)  
Signal to Noise Ratio below rated power (20 Hz to 20 kHz)  
Damping Factor: 10 Hz to 400 Hz  
0.25 dB  
0.25 dB  
> 100 dB  
> 100 dB  
> 3000  
> 3000  
Crosstalk (below rated power, 20 Hz to 1 kHz)  
Controlled Slew Rate  
> 60 dB  
> 60 dB  
> 13 volts/ms  
20 k ohms, 10 k ohms  
> 13 volts/ms  
20 k ohms, 10 k ohms  
Input Impedance nominally balanced, nominally unbalanced  
Load Impedance (Note: Safe with all types of loads)  
Stereo  
Bridge Mono  
2-8 ohms  
4 ohms  
2-8 ohms  
4 ohms  
Voltage Gain (at maximum level setting)  
1.4V sensitivity  
26 dB gain  
31.5 dB  
26 dB  
33.1 dB  
26 dB  
Required AC Mains  
50/60 Hz, 100-250 VAC (+10%, -15%)  
50/60 Hz, 100-250 VAC (+10%, -15%)  
page 14  
Operation Manual  
 
K Series Power Amplifiers  
7 Specifications  
Performance (continued)  
Cooling  
K1  
K2  
Convection cooling  
Convection cooling  
Dimensions  
Width  
Height  
Depth  
EIA Standard 19-inch (48.3 cm) rack mount (EIA RS-310-B)  
3.5 inches (8.9 cm  
EIA Standard 19-inch (48.3 cm) rack mount (EIA RS-310-B)  
3.5 inches (8.9 cm  
16 inches (40.6 cm)  
16 inches (40.6 cm)  
Weight  
Net Weight  
32 pounds (14.6 kg)  
38 pounds (17.3kg)  
Operation Manual  
page 15  
 
K Series Power Amplifiers  
8 Service  
Crown amplifiers are quality units that rarely  
require servicing. Before returning your unit for  
servicing, please contact Crown Technical Sup-  
port to verify the need for servicing.  
8.2.2 Factory Service  
your own shipping pack, however we still  
recommend using a Crown Supplied Ship-  
ping Container. Minimum recommended  
requirements for materials are as follows:  
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;  
securely seal the package with an adequate  
carton sealing tape. Do not use light boxes  
or “peanuts.” Damage caused by poor  
packing cannot be covered under warranty.  
To obtain factory service, fill out the service  
information page found in the back of this man-  
ual and send it along with your proof of pur-  
chase and the defective unit to the Crown  
factory.  
This unit has very sophisticated circuitry which  
should only be serviced by a fully trained tech-  
nician. This is one reason why each unit bears  
the following label:  
For warranty service, we will pay for ground  
shipping both ways in the United States. Con-  
tact Crown Customer Service to obtain pre-  
paid 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.  
CAUTION: To prevent electric shock, do  
not remove covers. No user serviceable  
parts inside. Refer servicing to a quali-  
fied technician.  
4. Do not ship the unit in any kind of cabinet  
(wood or metal). Ignoring this warning  
may result in extensive damage to the unit  
and the cabinet. Accessories are not  
8.1 Worldwide 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 pur-  
chase along with the defective unit to an autho-  
rized service center. They will handle the  
necessary paperwork and repair.  
Your repaired unit will be returned via UPS  
ground. Please contact us if other arrange-  
ments are required.  
needed—do not send the product docu-  
mentation, cables and other hardware.  
8.2.3 Factory Service Shipping  
Instructions:  
If you have any questions, please contact  
Crown Factory Service.  
1. Before sending a Crown product to the  
factory for service, first call the Crown Ser-  
vice Department for a return authorization  
(RA) number.  
Crown Factory Service  
1718 W. Mishawaka Rd.,  
Elkhart, Indiana 46517 U.S.A.  
Remember to transport your unit in the original  
factory pack.  
Telephone: 574-294-8200  
800-342-6939 (North America,  
Puerto Rico, and Virgin Islands only)  
2. Be sure to fill out the service information  
form that follows and enclose it with your  
shipment, either inside the box or in a  
packing slip envelope securely attached to  
the outside of the shipping carton. Do not  
send the service information form sepa-  
rately. If you are sending the unit from a  
Shipping Center, we recommend taping  
the form to the product. We also recom-  
mend recording the serial number and  
model before shipping for your reference.  
8.2 US and Canada 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.  
Facsimile:  
574-294-8301 (Technical Support)  
574-294-8124 (Factory Service)  
Internet:  
8.2.1 Service at a US or Canada  
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 the Crown website at  
Customer Service.  
3. Keep a copy of the serial number and  
model.  
To ensure the safe transportation of your  
unit to the factory, ship it in an original  
factory packing container. If you don’t have  
the original carton, you may obtain a prod-  
uct service foam-in-place shipping pack  
from the Crown Factory Service Depart-  
ment at the number listed below. For non-  
warranty service, you may also provide  
page 16  
Operation Manual  
 
K Series Power Amplifiers  
9 Warranty  
UNITED STATES & CANADA  
SUMMARY OF WARRANTY  
est, insurance, closing costs, and other finance  
charges less a reasonable depreciation on the  
product from the date of original purchase. War-  
ranty work can only be performed at our autho-  
rized service centers or at the factory. Warranty  
work for some products can only be performed at  
our factory. We will remedy the defect and ship  
the product from the service center or our factory  
within a reasonable time after receipt of the defec-  
tive product at our authorized service center or  
our factory. All expenses in remedying the defect,  
including surface shipping costs in the United  
States, will be borne by us. (You must bear the  
expense of shipping the product between any for-  
eign country and the port of entry in the United  
States including the return shipment, and all  
taxes, duties, and other customs fees for such for-  
eign shipments.)  
FROM ANY DEFECT IN THE NEW CROWN  
PRODUCT. THIS INCLUDES ANY DAMAGE TO  
ANOTHER PRODUCT OR PRODUCTS RESULT-  
ING FROM SUCH A DEFECT. SOME STATES DO  
NOT ALLOW THE EXCLUSION OR LIMITATIONS  
OF INCIDENTAL OR CONSEQUENTIAL DAM-  
AGES, SO THE ABOVE LIMITATION OR EXCLU-  
SION MAY NOT APPLY TO YOU.  
Crown International, 1718 West Mishawaka Road,  
Elkhart, Indiana 46517-4095 U.S.A. warrants to  
you, the ORIGINAL PURCHASER and ANY SUB-  
SEQUENT OWNER of each NEW Crown product,  
for a period of three (3) years from the date of  
purchase by the original purchaser (the “warranty  
period”) that the new Crown product is free of  
defects in materials and workmanship. We further  
warrant the new Crown product regardless of the  
reason for failure, except as excluded in this War-  
ranty.  
WARRANTY ALTERATIONS  
No person has the authority to enlarge, amend, or  
modify this Crown Warranty. This Crown War-  
ranty is not extended by the length of time which  
you are deprived of the use of the new Crown  
product. Repairs and replacement parts provided  
under the terms of this Crown Warranty shall  
carry only the unexpired portion of this Crown  
Warranty.  
ITEMS EXCLUDED FROM THIS  
CROWN WARRANTY  
This Crown Warranty is in effect only for failure of  
a new Crown product which occurred within the  
Warranty Period. It does not cover any product  
which has been damaged because of any inten-  
tional misuse, accident, negligence, or loss which  
is covered under any of your insurance contracts.  
This Crown Warranty also does not extend to the  
new Crown product if the serial number has been  
defaced, altered, or removed.  
HOW TO OBTAIN WARRANTY  
SERVICE  
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.  
You must notify us of your need for warranty ser-  
vice within the warranty period. All components  
must be shipped in a factory pack, which, if  
needed, may be obtained from us free of charge.  
Corrective action will be taken within a reason-  
able time of the date of receipt of the defective  
product by us or our authorized service center. If  
the repairs made by us or our authorized service  
center are not satisfactory, notify us or our autho-  
rized service center immediately.  
LEGAL REMEDIES OF PURCHASER  
WHAT THE WARRANTOR WILL DO  
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.  
We will remedy any defect, regardless of the rea-  
son for failure (except as excluded), by repair,  
replacement, or refund. We may not elect refund  
unless you agree, or unless we are unable to pro-  
vide replacement, and repair is not practical or  
cannot be timely made. If a refund is elected, then  
you must make the defective or malfunctioning  
product available to us free and clear of all liens  
or other encumbrances. The refund will be equal  
to the actual purchase price, not including inter-  
DISCLAIMER OF CONSEQUENTIAL  
AND INCIDENTAL DAMAGES  
THIS STATEMENT OF WARRANTY SUPERSEDES  
ANY OTHERS CONTAINED IN THIS MANUAL  
YOU ARE NOT ENTITLED TO RECOVER FROM  
US ANY INCIDENTAL DAMAGES RESULTING  
FOR CROWN PRODUCTS.  
12/01  
Operation Manual  
page 17  
 
K Series Power Amplifiers  
9 Warranty  
WORLDWIDE EXCEPT USA & CANADA  
SUMMARY OF WARRANTY  
replacement, or refund. We may not elect refund  
unless you agree, or unless we are unable to pro-  
vide replacement, and repair is not practical or  
cannot be timely made. If a refund is elected, then  
you must make the defective or malfunctioning  
product available to us free and clear of all liens  
or other encumbrances. The refund will be equal  
to the actual purchase price, not including inter-  
est, insurance, closing costs, and other finance  
charges less a reasonable depreciation on the  
product from the date of original purchase. War-  
ranty work can only be performed at our autho-  
rized service centers. We will remedy the defect  
and ship the product from the service center  
within a reasonable time after receipt of the defec-  
tive product at our authorized service center.  
DISCLAIMER OF CONSEQUENTIAL AND  
INCIDENTAL DAMAGES  
Crown International, 1718 West Mishawaka Road,  
Elkhart, Indiana 46517-4095 U.S.A. warrants to  
you, the ORIGINAL PURCHASER and ANY SUB-  
SEQUENT OWNER of each NEW Crown1 product,  
for a period of three (3) years from the date of pur-  
chase by the original purchaser (the “warranty  
period”) that the new Crown product is free of  
defects in materials and workmanship, and we  
further warrant the new Crown product regardless  
of the reason for failure, except as excluded in this  
Warranty.  
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.  
1
Note: If your unit bears the name “Amcron,” please substitute  
it for the name “Crown” in this warranty.  
ITEMS EXCLUDED FROM THIS CROWN-  
WARRANTY  
HOW TO OBTAIN WARRANTY SERVICE  
You must notify your local Crown importer of  
your need for warranty service within the warranty  
period. All components must be shipped in the  
original box. Corrective action will be taken within  
a reasonable time of the date of receipt of the  
defective product by our authorized service center.  
If the repairs made by our authorized service cen-  
ter are not satisfactory, notify our authorized ser-  
vice center immediately.  
This Crown Warranty is in effect only for failure of  
a new Crown product which occurred within the  
Warranty Period. It does not cover any product  
which has been damaged because of any inten-  
tional misuse, accident, negligence, or loss which  
is covered under any of your insurance contracts.  
This Crown Warranty also does not extend to the  
new Crown product if the serial number has been  
defaced, altered, or removed.  
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.  
WHAT THE WARRANTOR WILL DO  
We will remedy any defect, regardless of the rea-  
son for failure (except as excluded), by repair,  
THIS STATEMENT OF WARRANTY SUPERSEDES  
ANY OTHERS CONTAINED IN THIS MANUAL FOR  
CROWN PRODUCTS.  
7/01  
page 18  
Operation Manual  
 
K Series Power Amplifiers  
Crown Factory Service Information  
Shipping Address: Crown Factory Service, 1718 W. Mishawaka Rd., Elkhart, IN 46517  
Phone: 1-800-342-6939 or 1-574-294-8200 Fax: 1-574-294-8124  
Owner’s Name : _________________________________________________________________________________________________________________________________________________________________  
Shipping Address: _______________________________________________________________________________________________________________________________________________________________  
Phone Number: ________________________________Fax Number: ________________________________ Email ________________________________________________________________________________  
Model: __________________________________________________________________________________ Serial Number: _________________________________________________________________________  
Purchase Date : _________________________________________________________________________________________________________________________________________________________________  
NATURE OF PROBLEM  
(Be sure to describe the conditions that existed when the problem occurred and what attempts were made to correct it.)  
_______________________________________________________________________________________________________________________________________________________________________________  
_______________________________________________________________________________________________________________________________________________________________________________  
_______________________________________________________________________________________________________________________________________________________________________________  
_______________________________________________________________________________________________________________________________________________________________________________  
_______________________________________________________________________________________________________________________________________________________________________________  
_______________________________________________________________________________________________________________________________________________________________________________  
_______________________________________________________________________________________________________________________________________________________________________________  
_______________________________________________________________________________________________________________________________________________________________________________  
Other equipment in system:____________________________________________________________________________________________________________________________________________________________  
_______________________________________________________________________________________________________________________________________________________________________________  
_______________________________________________________________________________________________________________________________________________________________________________  
_______________________________________________________________________________________________________________________________________________________________________________  
If warranty has expired, payment will be: ! Cash/Check  
! Visa  
! Master Card  
! C.O.D.  
! Purchase Order for Crown Dealer  
Card Number:___________________________________ Exp. Date:___________________  
Signature:______________________________________________________________________  
ENCLOSE THIS PORTION WITH THE UNIT. DO NOT MAIL SEPARATELY.  
Operation Manual  
page 19  
 
 

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