User Responsibility; Mains Connection Grounding; Maintenance; Speaker Damage - Lab.gruppen C 88:4 Operation Manual

1.7

User Responsibility

1.7.1 Mains connection grounding

Your amplifier must be connected to a grounded socket outlet.
1.7.2 Speaker output hazard on Amplifiers
Power amplifiers are capable of producing hazardous output voltages. To avoid electrical shock, do not touch any exposed
speaker wiring while the amplifier is operating. The external wiring connected to the speaker terminals shall be installed by a
qualified instructed person or ready-made leads or cords of appropriate capacity shall be used.
As the amplifier outputs produce high voltage,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 product approvals.

1.7.3 Speaker damage

Your 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 them. Always check the speaker's continuous and peak power capabilities. Although the
amplifier's attenuators can be used to reduce the overall gain,an increase of the input signal can result in full output power, which
may cause damage to connected speakers.
1.74

Maintenance

For safe and reliable operation, the dust filters on both sides of the front panel, behind the grilles, should be removed and cleaned
regularly to ensure maximum airflow through the device.
If the dust filters are not maintained there will be safety risks. For example, the unit can ignite the dust and a fire will occur due to high
internal temperatures. There is also a risk that the unit will malfunction since it is dependent on constant airflow from front to rear. If the
dust filters are not clean and the unit malfunctions, any resultant problems will not be covered by the warranty.
C Series C 88:4, C 68:4, C 48:4, C 28:4 and C 16:4 Operation Manual rev 2.2.3
1. Important Safety Instructions
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