Crown d-45 Guia Do Utilizador

Connect your amplifier to the AC mains power 
source (power outlet) with the supplied AC 
power cordset.

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 specified 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.

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.

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.