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CE 4000
Power Amplifi er
Operation Manual
page 10
4 Operation
4.1 Precautions
Your amplifi er is protected from internal and
external faults, but you should still take the fol-
lowing precautions for optimum performance
and safety:
1. Before use, your amplifi er fi rst must be
confi gured for proper operation, includ-
ing input and output wiring hookup.
Improper wiring can result in serious
operating diffi culties. For information
on wiring and confi guration, please
consult the Setup section of this
manual or, for advanced setup tech-
niques, consult Crown’s Amplifi er
Application Guide available online at
www.crownaudio.com.
2. Use care when making connections,
selecting signal sources and controlling
the output level. The load you save may
be your own!
3. Do not short the ground lead of an
output cable to the input signal ground.
This may form a ground loop and cause
oscillations.
4. Never connect the output to a
power supply, battery or power
main. Electrical shock may result.
5. Tampering with the circuitry, or making
unauthorized circuit changes may be
hazardous and invalidates all agency
listings.
6. Do not operate the amplifi er with the
red Clip LEDs constantly fl ashing.
7. Do not overdrive the mixer, which will
cause clipped signal to be sent to the
amplifi er. Such signals will be repro-
duced with extreme accuracy, and loud-
speaker damage may result.
8. Do not operate the amplifi er with less
than the rated load impedance. Due to
the amplifi er’s output protection, such
a confi guration may result in premature
clipping and speaker damage.
Remember: Crown is not liable for
damage that results from overdriving
other system components.
3.7 Connect to AC Mains
Connect your amplifi er to the AC mains power
source (power outlet) with the supplied AC
power cordset. First, connect the IEC end of the
cordset to the IEC connector on the amplifi er;
then, plug the other end of the cordset to the
AC mains.
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.
Amplifi ers don’t create energy. The AC mains
voltage and current must be suffi cient to deliver
the power you expect. You must operate your
amplifi er from an AC mains power source with
not more than 10% variation above or below
the amplifi er’s specifi ed line voltage and within
the specfi ed frequency requirements (indicated
on the amplifi er’s back panel label). If you are
unsure of the output voltage of your AC mains,
please consult your electrician.
3.8 Startup Procedure
Use the following procedure when fi rst turning
on your amplifi er:
1. Turn down the level of your audio source.
2. Turn down the level controls of the ampli-
fi er.
3. Turn on the “Power” switch. The Power
indicator should glow.
4. Turn up the level of your audio source to
an optimum level.
5. Turn up the Level controls on the ampli-
fi er until the desired loudness or power
level is achieved.
6. Turn down the level of your audio source
to its normal range.
If you ever need to make any wiring or instal-
lation changes, don’t forget to disconnect
the power cord.
For help with determining your system’s opti-
mum gain structure (signal levels) please refer
to the Crown Amplifi er Application Guide,
available online at www.crownaudio.com.
3 Setup