PF-350 / PF-500 Bass Guitar Amplifier

Fault/Thermal Considerations:

As an amplifier works, it produces heat. The higher the signal level, the louder and hotter it gets. It is important to dissipate the heat as quickly as possible. This results in increased reliability and longevity for the amplifier.

The amplifier module is mounted on a large heatsink, which is cooled by convection where cool air is drawn through its fins, carrying the heat away. In order for this convection cooling to work efficiently, it is important to provide adequate airspace behind and to the side or above the amplifier. When positioning the Portaflex, we recommend leaving at least six inches of air space behind it.

In the unlikely event of the amplifier overheating, a built-in fault switch will activate, muting the signal and lighting the thermal LED. When the amplifier has cooled down to a safe operating temperature, the fault switch resets itself, and the Portaflex resumes normal operation.

If the fault switch activates frequently, try turning down the volume control a notch or two to avoid overheating the amplifier. Be aware that direct sunlight and/or hot stage lights may be the culprit of an amplifier overheating.

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