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Are you looking to buy TBS Unify Pro32 DP Heat Sink in Australia?
Add a heatsink to the DP. If only minimal airflow can be provided, that is what we recommend to avoid the power amplifiers running too hot and decreasing output.
We recommend scoring the screw holes with a 2mm drill bit when installing the heatsink to enable ample of pressure contact between the PCB and the heatsink.