Harman JBL CSA 1300Z - Power, Speaker Protection, and Startup; Connecting to AC Mains; Protecting Your Speakers; Startup Procedure

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2.7 Connecting to AC Mains
Connect your amplier 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er; then, plug the other end of the cord set to the AC mains.
When properly connected to a live power source and switched on, the power ring
should illuminate with a blue color.
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.
Ampliers don’t create energy. The AC mains voltage and current must be sufcient
to deliver the power you expect. You must operate your amplier from an AC mains
power source with not more than a 10% variation above or below the specied line
voltage and within the specied frequency range indicated on the back panel of the
amplier. 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 amplier signal. Not only does clipping sound bad, but
it can damage high-frequency drivers. The built-in clip limiter prevents clipping.
Also, avoid sending strong subsonic signals to the amplier. High-level, low-
frequency signals from breath pops or dropped microphones can blow out drivers.
You can switch to the HI-Z mode which, in addition to switching in the output
transformers for 70V and 100V speakers, activates the high-pass lter. The lter
prevents potentially damaging subsonic signals from going to the amplier by
eliminating signals below 70Hz.
2.9 Startup Procedure
Use the following procedure when rst turning on your amplier:
1. Turn down the level of your audio source.
2. Turn down the level controls of the amplier.
3. Power up the amplier. The Power ring will illuminate blue.
4. Turn up the level of your audio source to an optimum level.
5. Turn up the Level controls on the amplier 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.