[. . . ] It enables us to keep you posted on our latest advancements, and helps us to better understand our customers and build products that meet their needs and expectations. JBL Consumer Products Media Sub OM 7/17/98 3:57 PM Page 3 read first!Important Safety Precautions! CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: To prevent electric shock, do not remove the grounding plug on the power cord, or use any plug or extension cord that does not have a grounding plug provided. [. . . ] This product should be operated only from the type of power source indicated on the marking label. If you are not sure of the type of power supply to your home, consult your product dealer or local power company. For products intended to operate from battery power, or other sources, refer to the operating instructions. This product may be equipped with a polarized alternating-current line plug (a plug having one blade wider than the other). If you are unable to insert the plug fully into the outlet, try reversing the plug. If the plug should still fail to fit, contact your electrician to replace your obsolete outlet. Power-supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the product. The power cord of the product should be unplugged from the outlet when left unused for long periods of time. For added protection for this product during a lightning storm, or when it is left unattended and unused for long periods of time, unplug it from the wall outlet and disconnect the antenna or cable system. This will prevent damage to the product due to lightning and power-line surges. 16. Do not overload wall outlets, extension cords, or integral convenience receptacles, as this can result in a risk of fire or electric shock. Never push objects of any kind into this product through openings, as they may touch dangerous voltage points or short-out parts that could result in a fire or electric shock. [. . . ] To lower the output level, rotate the power/volume knob counterclockwise. Power/Volume Power/Volume Auto turn-on/turn-off The Media Sub features an automatic turn-on/turn-off feature. It will turn off when the source equipment (computer or CD player) has no sound output for approximately ten minutes and immediately turn back on when a signal is present. 4. [. . . ]