Patent ID: 8699737
Filing Date: 2014-04-15
Classification: H04R

Abstract:
1. A loudspeaker comprising a vented enclosure having a front mounting wall and at least two tuning ports in said front mounting wall, said vented enclosure forming a non-partitioned interior volume and said tuning ports being displaced one from the other on said mounting wall, at least one transducer mounted to the front mounting wall of said vented enclosure, said transducer having a heat radiating portion which projects into the interior volume of said enclosure, a variable speed airflow producing means positioned in said enclosure behind but not in line with one of said tuning ports such that outside air is drawn into the vented enclosure through said tuning port by said variable speed airflow producing means and such that the outside air drawn into the vented enclosure is directed toward the heat radiating portion of said transducer, said variable speed airflow producing means being actuated by a tapped portion of an amplified audio signal driving said transducer such that the speed of the airflow producing means varies with the level of the audio signal, and wherein said variable speed airflow producing means includes at least one fan positioned in said enclosure proximate but not in line with one of said tuning ports for directing airflow toward the heat radiating portion of said transducer.