D Series Power Amplifiers
2 Setup
2.7 Connect to AC Mains
Connect your amplifier to the AC mains power source (power outlet) with the supplied AC power cordset.
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.
Amplifiers don’t create energy. The AC mains voltage and current must be sufficient to deliver the power you expect. You must operate your amplifier from an AC mains power source with not more than a 10% variation above or a 15% variation below the amplifier’s specified line voltage and within the specfied frequency requirements (indicated on the amplifier’s back panel label). If you are unsure of the output voltage of your AC mains, please consult your electrician.
2.7.1AC Mains Voltage Configura-
tion
North American 120 VAC, 60 Hz units have a standard three wire, grounded AC plug as specified by UL requirements. The 120 volt models and the European models have the appropriate plug. The other 200, 220 and 240 volt models have a North American 120 volt plug. The installer must cut off the plug and supply and install a plug appropriate for the installation. Note: Crown assumes no liability whatsoever for ungrounded operation, nor for violation of UL or local electrical codes.
120 VAC, 60 Hz North American units do not have a convertible transformer, and cannot be
used at other voltages and frequencies. Interna- tional units can be operated with an AC mains frequency of 50 to 400 Hz, and can be config- ured by an authorized Crown Service Center for five different line voltages: 100, 120, 200, 220 and 240 VAC. The back panel sticker indicates the unit’s factory configuration.
To alter your amplifier’s AC mains voltage con- figuration, take the unit to an authorized Crown Service Center.
2.8 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 ampli- fier.
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 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 installa- tion 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 Amplifier Application Guide, available online at www.crownaudio.com.
Operation Manual | page 9 |
