User Responsibility; Mains Connection Grounding (Earthing); Speaker Output Hazard; Radio Interference - Zenith 10K4 User Manual

3.3 User responsibility

3.3.1 Mains connection grounding (earthing)

Your amplifier must be connected to an
earthed socket outlet.

3.3.2 Speaker output hazard

Power amplifiers are capable of producing
hazardous voltages. To avoid an electric
shock, do not touch any exposed speaker wiring
while the amplifier is being operated. The external
wiring connected to the speaker terminals should be
installed by a qualified person or ready-made leads
or cables of appropriate capacity should be used.

3.3.3 Radio interference.

As the amplifier outputs produce high
voltages, do not connect or disconnect
speaker cables when the mains power is on. Also
attach the safety cover on the speaker terminals for
safe operation and to comply with electrical
regulations.
This product uses radio frequency energy and if not
used or installed in accordance with these operating
instructions, may cause interference to other
equipment, such as radio receivers. However, there
is no guarantee that interference will not occur in a
particular installation.
If this equipment does cause harmful interference
to radio or television reception, which can be
determined by turning the equipment on and off,
the user is encouraged to try to correct the
interference by one or more of the following
measures:
- Reorient the antenna.
- Increase the separation between the equipment
and receiver.
- Connect the equipment to an outlet on a circuit
different from that to which the receiver is
connected.
- Consult your dealer or an experienced radio/TV
technician for help.

3.3.4 Speaker damage

This amplifier is very powerful and can be
potentially dangerous to both loudspeakers
and humans alike. Many loudspeakers can be easily
damaged or destroyed by overpowering, especially
with the high power available from a bridged
amplifier.
Always check the speakers continuous and peak
power capabilities.
Even though the amplifiers front panel attenuators
can be used to reduce the gain, it is still possible to
reach full output power if the signal level is high
enough.

3.3.5 Maintenance

For safe operation and long-term reliability, the front
panel dust filters as well as the inside of the
amplifier should be cleaned out at regular intervals.
If the dust filters and inside the amplifier are not
maintained there could be safety reliability risks.
There is also a risk that the amplifier will malfunction
since the amplifier is dependent on a constant
airflow from front to rear. If the dust filters are not
cleaned and the amplifier malfunctions, any
resultant problems will not be covered by the
warranty.
Zenith 10K4 Amplifier Manual 5