Usually set to box wall thickness (0.75") or desired opening width
Required Slot Port Height
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Round Area (in²)
Slot Area Needed (in²)
Slot Port Dimensions
Equivalent Round Port Diameter
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Slot Area (in²)
Round Area Equiv. (in²)
Formula: Round area = π × (d/2)² | Slot area = W × H | Match areas for equivalent port tuning.
When using multiple ports, the total area is multiplied by the quantity. Always keep port length the same when swapping shapes.