JBL CSA-2120, Руководство пользователя

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2.7 Connecting to AC Mains
Connect your amplifier to the AC mains power source (power outlet) with the supplied AC
power cord. First, connect the IEC end of the cord set to the IEC connector on the ampli-
fier; then, plug the other end of the cord set to the AC mains.
WARNING
: 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 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.
2.8 Protecting Your Speakers
It’s wise to avoid clipping the amplifier signal. Not only does clipping sound bad, it can
damage high-frequency drivers. The built-in clip limiter prevents clipping.
Also, avoid sending strong subsonic signals to the amplifier. High-level, low-frequency
signals from breath pops or dropped microphones can blow out drivers. You can switch on
the highpass filters, and this avoids to send subsonic signals under 70 Hz to the amplifier.
The high-pass filter is also useful when using the CST-2120 transformer module into a line
of 70V or 100V distributed loudspeakers, to prevent distortion within the speakers due to
transformer saturation.
2.9 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. Power up the amplifier. The Power indicator should light.
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.
If you ever need to make any wiring or installation changes, don’t forget to disconnect the
power cord.