| 摘要 |
A loudspeaker is disclosed having a pole piece formed with at least one axial bore, and at least one vent bore extending between the outer surface of the pole piece and intersecting the axial bore at a location where the voice coil of the loudspeaker is concentrically disposed about the pole piece. The at least one axial bore and at least one vent bore are effective to cause the flow of cooling air, which enters and exits the dust cap cavity from outside of the speaker, to flow directly against at least a portion of the interior of the former of the voice coil.
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