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MA-5002VZ Power Amplifier
Operation Manual
3.7 Connect to AC Mains
Connect the AC power cordset of your amplifier
to the AC mains power source (power outlet).
NOTE: The plug supplied with 120V versions of
the MA5000VZ is a 120V, 30-ampere plug
(Figure 3.9).
NOTE: The third prong of this connector
(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 10% variation above or 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.
3 Setup
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 “Enable” switch. The Enable indicator
should glow.
4. Turn up the level of your audio source to an opti-
mum 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 instal-
lation changes, don’t forget to turn off the
amplifier and 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.
4 Operation
4.1 Precautions
Your Macro-Tech Series amplifier is protected
from internal and external faults, but you should
still take the following 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 configura-
tion, please consult the Setup section of this
manual or, for advanced setup techniques,
consult Crown’s Amplifier Application
Guide available online at www.crownau-
dio.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.
4. Never connect the output to a power
supply, battery or power main. Elec-
trical shock may result.
5. Tampering with the circuitry, or making
unauthorized circuit changes, may be haz-
ardous and invalidates all agency listings.
6. Do not operate the amplifier with the Signal/
IOC LEDs constantly flashing.
7. Do not overdrive the mixer, which will cause
a clipped signal to be sent to the amplifier.
Such signals will be reproduced with
extreme accuracy, and loudspeaker damage
may result.
8. Never operate the amplifier with less than
the rated load impedance. Due to the ampli-
fier’s output protection, such a configuration
may result in premature clipping and
speaker damage.
Remember: Crown is not liable for damage that
results from overdriving other system compo-
nents
Figure 3.9 120V, 30A Power Plug
Supplied with 120V Versions of the
MA5002VZ