Crown CTs 4200 Operation Manual page 6

3 Setup
3.7 Connect to AC Mains
Connect your amplifier 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 amplifier; then, plug the other end of
the cordset to the AC mains.
WaRNiNg: The third prong of this connector
(ground) is an important safety feature. do not
attempt to disable this ground connec tion by
using an adapter or other methods.
Amplifiers don't create energy. The AC mains volt age
and current must be sufficient to deliver the power you
expect. If the AC line voltage varies out of an acceptable
range, the amplifier's power supply turns off and the
blue Power LED flashes. The amplifier will turn back on
when the AC line voltage returns to safe operating
levels. Figure 3.10 pro vides voltage limits for all
amplifier AC voltage con figurations. Also, the amplifier
must be run within the specified mains frequency
requirements (indi cated on the amplifier's back panel
label). If you are unsure of the output voltage of your
AC mains, please consult your electrician.
Under-Voltage Over-Voltage
Models
Limit Limit
100VAC
(CTs 8200 90VAC 110VAC
only)
120 VAC units 108VAC 132VAC
220V/230V/
198VAC 264VAC
240V units
Figure 3.10 AC Under-Voltage and Over-Voltage
Limits for Various Amplifier Models
page 10
CTs Power Amplifiers
3.8 Startup Procedure
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.
3. Turn on the "Power" switch. The Power
indica tor should glow.
4. Turn up the level of your audio source to an
optimum level.
5. Turn up the Level controls on the amplifier 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 installation
changes, don't forget to disconnect the power cord.
For help with determining your system's optimum
gain structure (signal levels) please refer to the
Crown Amplifier Application Guide, available online
at www.crownaudio.com.
Operation Manual
CTs Power Amplifiers
4 Operation
4.1 Precautions
Your amplifier 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 amplifier first must be
con figured for proper operation, including
input and output wiring hookup. Improper
wiring can result in serious operating
difficulties. For information on wiring and
configuration, please consult the Setup
section of this manual or, for advanced setup
techniques, consult Crown's Amplifier
Application Guide available online at www.
crownaudio.com.
2. Use care when making connections, select ing
signal sources and controlling the out put
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.
Operation Manual
4. WaRNiNg: 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
hazard ous and invalidates all agency listings,
and may also void the product's warranty.
6. Do not operate the amplifier with the red Clip
LEDs constantly flashing.
7. Do not overdrive the mixer, which will cause
clipped signal to be sent to the amplifier. Such
signals will be reproduced with extreme
accuracy, and loudspeaker damage may result.
8. Use caution when operating the amplifier with
a 2-ohm load impedance on 1 channel. Do not
operate the amplifier with less than a 2-ohm
load impedance per channel when driving
more than 1 channel. Due to the amplifier's
output protection, such a config uration may
result in premature clipping, speaker damage
or a blown power fuse.
Remember: Crown is not liable for damage that
results from overdriving other system compo nents.
page 11