Professional Power Amplifier
User Manual
C o n t e n t s
Safety Information................................................................................... 3
1.0 Introduction & Unpacking ..................................................................... 4
2.0 Mechanical Installation ........................................................................ 5
3.0 AC Power Connection .......................................................................... 6
4.0 Audio Connections .............................................................................. 7
Inputs ............................................................................................................. 7
Outputs ........................................................................................................... 8
Stereo operation ........................................................................................................... 8
Bridge mono operation ................................................................................................... 8
5.0 Control operation ............................................................................... 9
a. Power Switch ................................................................................................. 9
b. Level controls 1 and 2 ...................................................................................... 9
c. Bridge switch ................................................................................................. 9
6.0 Indicators ........................................................................................ 10
A. AC Present ..................................................................................................
B. Operate .....................................................................................................
C. Fault .........................................................................................................
D. Temp 1&2 ...................................................................................................
E. Signal ........................................................................................................
F. Clip ...........................................................................................................
G. Bridge .......................................................................................................
10
10
10
10
10
11
11
7.0 Typical applications ........................................................................... 12
a. Two channel (stereo) operation .........................................................................
b. Two amplifiers used in bridge mode ....................................................................
c. Two amplifiers for stereo with a mono sub-bass ......................................................
d. Calculating Impedance ...................................................................................
12
12
13
13
8.0 Glossary .......................................................................................... 14
9.0 Specifications ................................................................................... 17
10.0 Troubleshooting .............................................................................. 18
Checklist ....................................................................................................... 18
Status Indication .............................................................................................. 19
11.0 Service & Warranty .......................................................................... 20
2
S a f e t y
Important Safety Instructions
I n f o r m a t i o n
DO NOT REMOVE COVERS. NO USER
SERVICEABLE PARTS INSIDE.
1) Read these instructions.
REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL.
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.
THIS EQUIPMENT MUST BE GROUNDED. IT
SHOULD NOT BE NECESSARY TO REMOVE ANY
PROTECTIVE GROUND OR SIGNAL CABLE
SHIELD CONNECTIONS TO PREVENT GROUND
LOOPS. ANY SUCH DISCONNECTIONS ARE
OUTSIDE THE RECOMMENDED PRACTICE OF
CROWN AND WILL RENDER ANY EMC OR
SAFETY CERTIFICATION VOID.
For continued compliance with international
EMC legislation ensure that all input cables are
wired with the cable screen connected to Pin 1
of the XLR connectors and/or the jack plug
sleeve.
WARNING!
This equipment can create
high sound levels. Exposure
without adequate protection
could cause permanent
damage to hearing.
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.
This equipment has been tested and found to comply with the following European and international
Standards for Electromagnetic Compatibility and Electrical Safety:
Radiated Emissions
RF Immunity
Mains Disturbance
Electrical Safety
Radiated Emissions
(EU):
(EU):
(EU):
(EU):
(USA):
EN55013 (1990)
EN50082/1 (1992)
EN61000/3/2 (1995)
EN60065 (1993)
FCC part 15 Class B
3
Associated Equipment
RF Immunity, Fast Transients & ESD
1 . 0
I n t r o d u c t i o n
&
U n p a c k i n g
Front panel
Rear panel
Introduction
The PULSE series of amplifiers are high performance professional power amplifiers capable of delivering
major power output from a new generation of switched mode power supplies. All Pulse series amplifiers
are housed in the same size 2U cases and feature light, powerful switching power supplies along with
massive heatsinks and two dual-speed cooling fans. Microprocessor supervision of the power supplies,
protection and thermal systems, ensures that the amplifier is always operating correctly thereby
protecting both the amplifier and your speakers from failure.
We set out to design an amplifier that is as equally at home in live touring sound environments as it is for
installation amplification. We especially wanted to produce amplifiers that are capable of maintaining
excellent performance when being driven to their limit with real loudspeaker loads.
Sonic performance is always in the forefront of our minds and to this end the PULSE series represents the
pinnacle of many years work with professional amplifiers. PULSE amplifiers have impeccable technical
specifications, and extensive listening tests by many people with a wide variety of loudspeakers leads us
to believe that they sound pretty good too!
Unpacking
As part of the Crown system of quality control, we check every product carefully before packing to ensure
that it reaches you in flawless condition.
Before you go any further, please check the unit for any physical damage and retain the shipping carton
and all relevant packing materials for use, should the unit need returning.
In the event that damage has occurred, please notify your dealer immediately, so that a written claim to
cover the damages can be initiated. Check out the Warranty and Service sections for more information.
4
2 . 0
M e c h a n i c a l
I n s t a l l a t i o n
A vertical rack space of 2U
(88mm high) is required,
with an in rack depth of
18.1 inches (460mm).
The amplifier protrudes
1.6 inches (40mm) from
the rack supports.
Mounting & unit dimensions
If the unit is likely to undergo extreme vibration through trucking and touring, front rack ear
reinforcement brackets and rear mounting plates must be fitted. These are available from your dealer.
Damage caused by insufficient support is not covered by the warranty.
To prevent damage to the front panel finish, always use protective plastic cups or washers underneath the
rack mounting bolts.
Ventilation gaps between units are not required, however care must be taken to ensure that an
unobstructed free flow of clean air is possible from the back of the unit to the front. It is important that
neither the rear air intakes or front exhaust grilles are covered. The internal airflow of all PULSE
amplifiers is designed to minimize contamination of the electronics by the cooling air so fan filters will
not normally be required. If however, the amplifier is to be used in an environment where the intake air
might be excessively dirty, optional external fan filters should be purchased from your dealer. Fan filters
should NOT be fitted unless there is likely to be a problem as they require regular cleaning to stop them
getting clogged. Clogged fan filters will result in the amplifier going into premature temperature protect.
PLEASE NOTE: Users must ensure that glycol based smoke and related substances are not allowed to enter
the amplifier (fan filters will not help). Glycol based smoke is HIGHLY corrosive and prolonged exposure
will cause irreparable damage to your amplifier.
Do not expose the amplifier to rain or moisture during either operation or storage. If the unit does come
into contact with moisture, remove the AC power cord immediately and leave it in a suitably dry, warm
place to dry out.
Be aware that when any equipment is taken from a cold location into a hot humid one, condensation may
occur inside. Always allow time for the equipment to attain the same temperature as its environment
before applying the AC power cord.
5
3 . 0
A C
P o w e r
C o n n e c t i o n
WARNING! THIS APPLIANCE MUST BE GROUNDED.
The amplifier must always be connected to a 3-wire grounded AC outlet. The rack framework must also be
connected to the same grounding circuit. The unit must NOT be operated unless the power cables' ground
wire is properly terminated - this is important for personal safety as well as for proper control over the
system grounding.
The wires in the power lead are color coded as follows:
Green and Yellow......Ground
Blue......Neutral
Brown......Live/Hot
IMPORTANT: The PULSE 2x650 is designed to use 50/60Hz AC power. Acceptable AC input supply voltage
ranges from 180V to 265V
The application of voltages above those specified may cause permanent damage that is not covered by
your warranty. Lower voltages may cause erratic operation.
Note that although the amplifier will operate correctly down to the voltages indicated, the quoted output
power will only be achieved with the stated nominal voltages.
IMPORTANT : The AC power fuse carrier on the rear of the unit must be fitted with the correct type and
rating of fuse, in this case T10A.
In the unlikely event of the AC fuse failing without good reason, disconnect the unit from the power
supply, and always replace with the appropriately rated fuse (as specified above) for continued protection
against damage and fire.
6
4 . 0
A u d i o
C o n n e c t i o n s
Inputs
For each channel, there is a 1/4” phone jack socket, male & female XLR and pluggable removable
terminal block connectors provided for signal input on the rear panel of the amplifier. Each is
electronically balanced at an impedance greater than 10k ohms.
The removable terminal block, phone jack and both XLR connectors are internally wired in parallel, and
therefore any socket may be used for the input signal. The connectors not used in this manner function as
loop-through connectors for daisy chaining a number of channels.
The ‘HOT, + or in phase’ connection for the removable terminal block is to pin 2 of the XLRs and the TIP of
the phone jack.
The ‘COLD, -, or out of phase’ connection for the removable terminal block is to pin 3 of the XLRs and the
phone jack RING.
The removable terminal block earth symbol pin, pin 1 of the XLR’s and the Jack SLEEVE are internally
connected to the chassis. The screen of the input cable should always be connected to one of these points
to ensure that EMC regulations are met. The cable shield ground should also be connected to the
equipment which is providing the input signal.
Balanced wiring to pulse XLR
Balanced wiring to pulse phone jack
When feeding the PULSE 2x650 from unbalanced sources, connect the signal conductor to the + pin of the
removable terminal block, pin 2 of the XLR or the Jack TIP, with the cable screen going to pins - and
ground of the removable terminal block, 1 and 3 of the XLRs or the SLEEVE and RING of the Jack.
Unbalanced wiring to pulse XLR
Unbalanced wiring to pulse phone jack
For bridge mode operation, channel 1 is used as the input signal for the amplifier. The channel 2 input is
ignored when bridge mode is enabled.
7
A u d i o
C o n n e c t i o n s . . .
Outputs
Stereo wiring
®
Both binding post and Speakon connectors are
provided for each channel, these are internally wired
in parallel so either or both may be used. Note that it
is possible to lever the caps out of the ends of the
binding posts to insert 4mm banana type plugs but this
will invalidate the product safety approvals in some
territories. The side entry positions for these
connectors should therefore be used if possible.
Stereo operation
If you are using the binding posts, for non bridged
operation the loudspeakers should be connected
between the RED and BLACK binding post terminals or
®
the Speakon 1+ & 1- pins. The amplifier will be noninverting with respect to the RED terminal and 1+
®
Speakon pin.
1+ 1-
1- 1+
More than one speaker can be connected to each
channel as long as the total impedance per channel is
not less that 2 ohms. See section 7.0d of this manual
for more information about how to calculate
impedance.
Bridge mono operation
Bridge wiring
To use the amplifier in bridge mode, for binding post
connection, the speakers must be connected between
two RED terminals leaving the BLACK terminals
unconnected. In bridge mode the amplifier is non®
inverting relative to the 1+ pin of the Speakon
connector and the channel 1 RED binding post.
Do NOT
connect
®
If the Speakon connector is used, switching the
amplifier in to bridge automatically takes care of the
®
Speakon wiring for you. Therefore the loudspeaker
connector is WIRED THE SAME WAY AS FOR NON BRIDGE
MODE, i.e. between 1+ and 1-. This significantly
simplifies the speaker wiring enabling the same leads
to be used for bridged and non-bridged modes. Channel
1 output carries the bridged signal. During bridge mode
operation no connector should be inserted into the
channel 2 output.
Do NOT
connect
1-
1+
More than one speaker can be connected to the bridged
pair of channels as long as the total impedance is not
less that 4 ohms. See section 7.0d of this manual for
more information about how to calculate impedance.
8
5 . 0
C o n t r o l
o p e r a t i o n
a. Power Switch
Pressing this switch so that the
white dot is closest to the front
panel signals to the
microprocessor that the user
wishes to turn on the power
supply. Note that the
microprocessor will only switch
the power supply on once it has
assured that there are no
internal faults. From the first
application of AC power it takes
approximately 7 seconds to
complete these tests. During the test time the microprocessor will flash both the TEMP lights and the
FAULT light once a second. If the amplifier has already completed these tests, then when the switch is
pressed, power up will occur within 1 second. While the power up sequence is being completed all
amplifiers channels are muted.
b. Level controls 1 and 2
These controls allow the user to change the sensitivity, or the level required to drive each channel of the
amplifier into clip, from approximately +90dBu with the controls fully counter clockwise, to +1dBu with
the controls full clockwise. +1dBu equals approximately 870mV RMS and this level will be just sufficient
with a 4 ohm load and nominal AC voltage to drive the amplifier into clip. If the amplifier is operated in
bridge mode, use the channel 1 level control only, the channel 2 control has no effect.
Supplied with each PULSE amplifier are special blanking plugs that may be fitted after the control knobs
have been pulled off thus allowing the levels to be set and then made tamper proof.
c. Bridge switch
Located on the rear panel, this switch enables bridge mode operation.
Activation of this switch is indicated by the Bridge indicator on the front
panel.
When the amplifier is operated in bridge mode, the power available
doubles allowing larger speakers to be driven. Two things must be kept in
mind when bridge mode is used, namely the minimum impedance that can
be driven increases from 2 ohms to 4 ohms and if binding post outputs are
used, the speaker wiring must be changed as described in the 4.0 Audio
Connections section of this manual.
9
6 . 0
I n d i c a t o r s
A. AC Present
This light glows when AC power is applied to the amplifier, whether or not the amplifier is actually
running. This light will still glow even if the rear panel fuse is blown because it is powered from the
separate, internally fused supply that powers the microprocessor.
B. Operate
Illuminated when the main power supply is switched on using the front panel switch.
C. Fault
If, for any reason, the microprocessor detects a problem then this light comes on. If it is not flashing the
problem is with one or more of the amplifier channels. If it flashes, the processor has been unable to start
the main power supply; this may be because the power supply has become too hot, or because the rear
panel fuse has failed. If letting the amplifier cool and/or replacing the fuse does not clear the problem,
the amplifier must be returned to an authorized service center for repair.
Under some circumstances, the Fault light might flash with a period of about 3 seconds along with the
Power light and various clicking noises. This is because the processor is trying to power up the amplifier
but is detecting an error, aborting, and then retrying. This may either continue indefinitely (for example a
shorted output in bridge mode) or stop after a number of attempts.
D. Temp 1&2
These lights come on if the microprocessor detects that the corresponding channel’s heatsink has
exceeded the maximum allowed temperature. If the light is on, that channel will have been muted. Once
the heatsink has cooled, normal operation will resume. This cycling will be allowed to continue
indefinitely.
During normal to heavy use, the substantial heatsinks used in PULSE amplifiers should ensure that these
lights never come on, however if the front air intakes, rear air exhausts or any fan filters fitted become
blocked an over temperature condition may occur.
E. Signal
This indicator lights when a signal exceeding approximately -26dBu is applied to a channel. In bridge
mode only the light for channel 1 operates.
10
I n d i c a t o r s . . .
F. Clip
This light is in fact rather more sophisticated than a simple clip indicator; it actually measures distortion.
This may occur either due to clipping, trying to drive too low an impedance speaker load or any other
mechanism that causes the output of the amplifier channel to not be as expected by the monitoring
circuit. Note that if the amplifier channel is muted by the microprocessor and a signal is applied, the clip
light will come on.
G. Bridge
If this light is on it indicates that the amplifier has been configured for bridge mode operation by the rear
panel switch.
11
7 . 0
Ty p i c a l
a p p l i c a t i o n s
a. Two channel (stereo) operation
In this example, each channel of the PULSE 2x650 is being used independently. For this application,
ensure that the rear panel BRIDGE switches are in the NORMAL position. More than one speaker may be
used on each channel as long as the total impedance is not less than 2 ohms. See section d for more
information about how to calculate impedance.
Stereo
L
1
R
2
1
2
for example - both speakers up to
650W 4 ohms
b. Two amplifiers used in bridge mode
Here one amplifier is being used per channel. As the amplifiers are being operated in bridge mode, each is
capable of delivering well over 1600W into 4 ohms or 1300W into 8 ohms. More than one speaker may be
used on each amplifier as long as the total impedance is not less that 4 ohms. See section d for
information about how to calculate impedance.
Bridge
L 1
R
1
Bridge
1
1
for example - both speakers up to
1300W 8ohms
12
Ty p i c a l
a p p l i c a t i o n s . . .
c. Two amplifiers for stereo with a mono sub-bass
Here Two amplifiers are used with an active crossover to provide a separate sub-bass signal.
L
R
Stereo
1
2
2
1
Bridge
1
2
Sub speaker - 1300W 8 ohms
main (mid-high) speakers - 650W 4 ohms
d. Calculating Impedance
Measured in ohms, impedance is a measure of AC resistance. Loudspeakers generally come in 16, 8 or 4
ohm varieties. Amplifiers have a lower limit to what impedance they can drive without being overloaded,
there is not usually an upper limit. The PULSE 2x650 can drive any impedance between an open circuit and
2 ohms when in stereo and between an open circuit and 4 ohms when bridged.
When more than 1 speaker is used, it is easy to calculate the total impedance but remember that unless
you are sure you know what you are doing, all the speakers should be the same impedance.
If the speakers are wired in series, just add their impedances together. If they are in parallel there is a
simple rule: two impedances the same will equal half the individual impedance, for example 8 & 8 = 4 or
to take this further, four 8 ohm drivers = 2 ohms (8 & 8 = 4 ..... 8 & 8 = 4 ..... 4 & 4 = 2).
13
8 . 0
G l o s s a r y
In this section many of the terms used throughout this manual are explained in more detail.
Active
Active electronic circuits are those which are capable of voltage and power gain by using transistors and
integrated circuits.
Amplitude
Refers to the voltage level or intensity of a signal, and is usually measured in volts or decibels.
Balanced
A three wire connection in which two of the wires carry the signal information, the third acts as a shield
tied to chassis ground. The two signal lines are of opposite polarity (out of phase by 180 degrees) at any
given moment in time, and are of equal potential with respect to ground. Balanced connections are used
to help reject induced hum and noise in system interconnections.
Binding Post
A type of connector that maybe used for either a bare wire or a wire terminated in a 4mm plug.
Bridge Mode
This applies to a method of combining two power amplifier channels to make one channel capable of
providing approximately twice the power into a single load. This load must be connected across the two
positive channel outputs.
Clip or Clipping
The term used to describe an overdrive condition in a piece of equipment. A clipped signal is distorted and
will sound harsh. Applying a heavily clipped signal to a loudspeaker, whilst not unduly affecting the
amplifier, may cause speaker damage.
dB
A unit for expressing the ratio between two signal levels for comparison purposes. On its own it has no
absolute level meaning. Rather, it is a logarithmic ratio used to express the differences between two
amounts or levels. Positive numbers indicate an increase, and negative ones a decrease.
Some useful ratios are:
+3dB = Double Power
+6dB = x 2 Voltage or x 4 Power
+10dB = x 3 Voltage or x 10 Power
+20dB = x 10 Voltage or x 100 Power
dBm
The addition of ‘m’ after dB indicates an absolute scaling for the dB ratio. Instead of a ratio, the dB
becomes a measure of voltage. 0dBm = a power level of 1 milliwatt into a load of 600 ohms. It is also
loosely used to describe signal voltage in 600 ohm circuits.
14
G l o s s a r y. . .
dBu or dBv
The addition of a lower case ”u” or “v” after dB indicates an absolute scaling for the dB ratio. 0dBu (or 0
dBv) = 778mV or 0.778 Volts, and it has no regard for power or impedance. This term is widely used for
expressing signal voltages in modern audio equipment with high input impedances and low output
impedances. For dBv the same scale is used as for dBu above, except that 0dBV = 1.0 Volts.
Distortion
Any modification of a signal which produces new frequency components not present in the original.
Harmonic distortion refers to added frequencies that are overtones to the fundamental frequency.
Intermodulation distortion refers to added frequencies that are sum and difference values derived from
the beating together of two frequencies.
Frequency
The repetition of a waveform. The unit of frequency is Hz, and 1 cycle per second is equal to 1Hz. The
audio band is generally restricted to frequencies of 20Hz to 20,000Hz (20kHz).
Frequency Response
The equipment’s relative gain compared to frequency. Generally expressed as +/- a certain number of dBs
from 20Hz to 20kHz.
Impedance
The AC equivalent of resistance and measured in ohms. It indicates the amount of drive required for an
input, or the drive capability of an output, at a given signal level.
Level
The amplitude of a signal, measured in Volts or Decibels.
Line Level
Generally indicates a signal whose level is between -10 and +10dBu or -14 to +6 dBV. Mic level refers to
levels around -40dBu.
Noise
The term given to any signals appearing at the output of a piece of equipment when no input signal is
applied. Most commonly, noise takes the form of hum, buzz or hiss.
Octave
A logarithmic unit for expressing frequency ratios. Positive values indicate an increase and negative ones a
decrease. One octave ‘up’ the scale is equivalent to double the frequency. One octave ‘down’ is equivalent
to half the frequency.
15
G l o s s a r y. . .
Removable terminal block
One of the names given to a pluggable terminal block suitable for use with audio where connection to
permanent wiring makes their use more suitable than XLR or Jack connectors.
Transient
A sudden burst of energy in an audio signal which only lasts for a small period of time relative to the rest
of the signal. The level of these transients can often reach 10 times (+20dB) or so above the normal
operating level of the audio equipment, and may cause distortion if headroom is inadequate.
®
Speakon
A type of connector, manufactured by Neutrik with either 2, 4 or 8 pole connectors, specifically designed
for connecting speakers to amplifiers. PULSE amplifiers and the majority of loudspeakers use the 4 pole
type.
XLR
A type of connector used by audio professionals for connecting audio line, or microphone level signals to
equipment. Usually three pole. Note that some XLRs may be carrying AES/EBU digital signals and these
should not be plugged into audio channels.
16
9 . 0
Power Ratings
S p e c i f i c a t i o n s
Pulse 2x650
Stereo
Measured per channel, both channels driven at 1kHz to no more than 0.1% THD+N
8 ohms
400W rms
4 ohms
650W rms
2 ohms
850W rms*
* Note: 2 ohm spec is at 1% THD
Bridged Mono
16 ohms
800W rms
8 ohms
1300W rms
4 ohms
1700W rms*
* Note: 4 ohm bridged spec is at 1% THD
Input Sensitivity
+1dBu for full output
Input Impedance
20 kohm
Input Connectors
1/4-inch TRS balanced phone jack, removable terminal block,
male and female XLR
Distortion
<0.006% THD, 1kHz, 1dB below clip, 22kHz measurement bandwidth
Frequency Response
20Hz to 20kHz, +0/-0.2dB; <2Hz to >120kHz +0/-3dB
Controls
Power switch, bridge mode switch, indented level controls (these may be made
tamper-proof)
Indicators
AC Present, Operate, Signal, Bridge, Clip, Temp., Fault
Protection
Microprocessor supervised: Over-temperature, DC on outputs, output stage
overload, inrush current surge, power fail and brownout
Noise
<-100dB ref full output 20Hz - 20kHz measurement bandwidth
Slew Rate
>50 V/microsecond
Damping Factor
>200 ref 8 ohm
Output Connectors
Binding post and Speakon
AC Power
230 volts AC nominal, 2200VA, all channels driven
Dimensions
3.5" (89mm) x 18.2" (460mm) x 19" (483mm)
Weight
24lbs (11kg)
®
17
1 0 . 0
Tr o u b l e s h o o t i n g
Checklist
Problem:
No output
Check:
Are the AC Present and Operate lights on?
Are the Fault & Temp lights off?
Are the Signal lights on?
Are the level controls turned up?
Are the speakers properly connected? (in particular check that older style ‘ring lock’ type
Speakons are rotated in the socket).
Problem:
Distorted sound
Check:
Are the Clip lights on?
Is any equipment before the amp being over driven?
Are any speaker cables shorted?
Are the loudspeakers too low an impedance?
Are the input cables wired correctly?
Problem:
Hum or buzzing
Check:
Is the amp properly grounded?
Are the input cables shielded?
Are the input connectors properly wired?
Are you using an unbalanced input?
Does the noise stop if the equipment driving the amp is switched off?
18
Tr o u b l e s h o o t i n g . . .
Status Indication
There is a microprocessor inside each PULSE amplifier responsible for monitoring all critical systems. The
status of which are displayed on the front panel lights.
Their indication is as follows:
Fault and both Temp lights flashing
The amplifier has just been plugged in and the microprocessor is carrying out a test sequence. This is
normal and will stop after about 7 seconds.
Power light on, Operate light off, Fault light on & flashing
The microprocessor has been unable to start the main power supply. If the condition persists for more than
1 hour without an input signal, check the rear panel fuse. If the fuse is blown and a replacement also fails
(or the fault persists), return the amplifier to an authorized service center. Information is in the Service &
Warranty sections.
Power light on, Operate light off, Fault light on (not flashing)
(The Operate and Fault light may be flashing very slowly accompanied by internal clicking). A fault has
been detected with one or more of the amplifier channels and the processor has shut down the power
supply to protect both the amplifier and your speakers. Depending on the fault it may try to resume
operation again indefinitely, or give up after a number of attempts. If after disconnecting all input and
output leads and switching the amplifier off and on again (to reset it), the condition persists, return the
amplifier to an authorized service center. Information is given in the Service & Warranty sections.
Power light on, Operate light on, Fault light on, Temp light on
One or both of the heatsinks have exceeded their maximum temperature. When in this condition, the
channel associated with each Temp light will be muted until the temperature has fallen to a safe level.
Normal operation will then automatically resume. The most likely causes of an over-temperature condition
are blocked rear air intake, obstructed front air exhausts or, if fitted, clogged fan filters.
19
1 1 . 0
S e r v i c e
Crown amplifiers are quality units that rarely require
servicing. Before returning your unit for servicing,
please contact Crown Technical Support to verify the
need for servicing.
packing material will not be sufficient to
withstand the stress of shipping. Do not use
loose, small size packing materials.
This unit has very sophisticated circuitry which should
only be serviced by an authorized Crown Service
Center.. 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.
&
W a r r a n t y
3. 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 needed—do not
send the product documentation, cables and
other hardware.
If you have any questions, please call or write the
Crown Technical Support Group.
Worldwide Service
Service may be obtained from an authorized service
center. Contact your local Crown/Amcron distributor
or our office for a list of authorized service centers.
To obtain service, simply present the receipt as proof
of purchase along with the defective unit to an
authorized s distributor. They will handle the
necessary paperwork and repair.
Technical Support / Factory Service
Plant 2 SW, 1718 W. Mishawaka Rd., Elkhart,
Indiana 46517 U.S.A.
Telephone: 219-294-8200
800-342-6939 (North America,
Remember to transport your unit in the original factory
pack.
Facsimile: 219-294-8301 (Technical Support)
219-294-8124 (Factory Service)
Crown Audio Customer Service
Puerto Rico, and Virgin Islands only)
Internet:
Service Shipping Instructions:
1. Contact your local Crown distributor for details
regarding where to send your amplifier. This
information is available on the Crown website or
by contacting Crown Audio Customer Service, see
details panel.
Always use the
original factory pack
to transport the unit.
2. To ensure the safe transportation of your unit to
the factory, ship it in an original factory packing
container. If you don’t have one, call or write
Crown’s Parts Department. With the exception of
polyurethane or wooden crates, any other
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http://www.crownaudio.com
3
YEAR
THREE YEAR
FULL WARRANTY
3
YEAR
UNITED STATES & CANADA
WORLDWIDE EXCEPT USA & CANADA
SUMMARY OF WARRANTY
Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 465174095 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.
SUMMARY OF WARRANTY
Crown International, 1718 West Mishawaka Road, Elkhart, Indiana 465174095 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.
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.
1
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 or at
the 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.
Note: If your unit bears the name “Amcron,” please substitute it for the name
“Crown” 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 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.
Visit www.crownaudio.com for a list of Crown authorized
service centers.
7/01
THIS STATEMENT OF WARRANTY SUPERSEDES ANY OTHERS
CONTAINED IN THIS MANUAL FOR CROWN PRODUCTS.
Visit www.crownaudio.com for a list of Crown authorized service centers.
Telephone: 219-294-8200. Facsimile: 219-294-8301
7/01
Telephone: 219-294-8200. Facsimile: 219-294-8301
Version 2.0
CB 190901
ZM10092-01 Crown Part Number: 133784-1
Crown is a registered trademark of Crown International.
Other trademarks are the property of their respective owners
A division of Harman International Industries
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