CTs
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.
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Limit | Limit | ||
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90VAC | 132VAC | ||
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220V/230V/ | 198VAC | 264VAC | |
240V units | |||
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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.
Figure 3.10 AC Under-Voltage and Over-Voltage
Limits for Various Amplifier Models
page 10 | Operation Manual |
