Assertion: speaker's woofer | /r/CapableOf | exit through the vent
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Source sentences:
text: The delay issue in vented systems is particularly important around the “handoff frequency” (the point in a vented system at which the port’s LF output begins to dominate over the woofer’s actual output) because the backwave of the woofer that exits through the vent is literally “delayed” some amount of time relative to the direct frontal output from the woofer.