Important Safety InstructionsiiiPLM Series Operation Manual rev 1.1.9▸ Check if the affected unit complies with the EMC limits for immunity, (CE-labeled). If not, address theproblem with the manufacturer or supplier. All electrical products sold in the EC must be approved forimmunity against electromagnetic fields, high voltage flashes, and radio interference.▸ Consult the dealer or an experienced radio/TV technician for help.1.7 User Responsibility1.7.1 Mains Connection GroundingYour apparatus must be connected to a grounded socket outlet.1.7.2 Speaker Output Hazard on AmplifiersAmplifiers are capable of producing hazardous output voltages. To avoid electrical shock, do not touchany exposed speaker wiring while the amplifier is operating. The external wiring connected to the speakerterminals shall be installed by a qualified person, or ready-made leads or cords of appropriate capacity shallbe used.As the power output channels on amplifiers produce high voltage, do not connect or disconnectspeaker cables when the mains power is on.1.7.3 Speaker DamageAmplifier apparatus is very powerful and can be potentially dangerous to both loudspeakers and humansalike. Many loudspeakers can be easily damaged or destroyed by overpowering them. Always check thespeaker’s continuous and peak power capabilities. Although the amplifiers attenuators can be used toreduce the overall gain, an increase of the input signal can result in full output power, which may causedamage to connected speakers.1.7.4 MaintenanceFor safe and reliable operation, the dust filters on both sides of the front panel, behind the grilles, should beremoved and cleaned regularly to ensure maximum airflow through the device.If the dust filters are not maintained there will be safety risks; for example, high internal temperaturescould ignite the dust start a fire. There is also a risk that the unit will malfunction since it is dependent onconstant airflow from front to rear. If the dust filters are not clean and the unit malfunctions, any resultingproblems will not be covered by the warranty.