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Operation Manual
CTs Power Amplifi ers
page 38
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 connector
(ground) is an important safety feature. Do not
attempt to disable this ground connec tion by
using an adapter or other methods.
Amplifi ers don’t create energy. The AC mains volt age
and current must be suffi cient to deliver the power you
expect. If the AC line voltage varies out of an acceptable
range, the amplifi er’s power supply turns off and the
blue Power LED fl ashes. The amplifi er will turn back on
when the AC line voltage returns to safe operating
levels. Figure 3.10 pro vides voltage limits for all
amplifi er AC voltage con fi gurations. Also, the amplifi er
must be run within the specifi ed mains frequency
requirements (indi cated on the amplifi er’s back panel
label). If you are unsure of the output voltage of your
AC mains, please consult your electrician.
Models
Under-Voltage
Limit
Over-Voltage
Limit
100VAC
(CTs 8200
only)
90VAC 110VAC
120 VAC units 108VAC 132VAC
220V/230V/
240V units
198VAC 264VAC
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 amplifi er.
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 amplifi 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 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 Amplifi er Application Guide, available online
at www.crownaudio.com.
3 Setup
Figure 3.10 AC Under-Voltage and Over-Voltage
Limits for Various Amplifi er Models