| 摘要 |
A ported speaker enclosure is disclosed for extending the low-frequency range of the enclosure and increasing the intensity of the low-frequency range of reproduced sound wherein the size of the enclosure, the locations of the speakers, and the size and locations of the ducted ports are determined by relatively simple relationships based solely on speaker cone dimensions. In one form, a ducted port speaker enclosure is comprised of two bass-range speakers, or woofers, wherein one woofer is located in a predetermined position above the other on the enclosure. An open sector of a plurality of open sectors of the frame at the back of the topmost speaker faces towards the top and an opposite open sector faces towards the bottom of the enclosure of the two woofer system. A sound damping material is added to cover the top and bottom facing sectors of the topmost speaker. Insulation material of predetermined dimensions is affixed to the inside walls of the right and left sides of the enclosure. A sound duct of predetermined dimensions on the left side and a sound duct of similar dimensions on the right side within the enclosure are affixed to the inside of the enclosure front panel at respective openings thereof at predetermined locations. Each sound duct is also affixed to a sidewall. The sidewall of the enclosure within the top and bottom members of the sound duct is integral with and part of the respective sound duct and front opening. In another form, a ducted port speaker enclosure is comprised of one woofer and two ducted ports in predetermined locations; insulation of predetermined dimensions is also affixed on the inside walls of the enclosure. Provision is made for mounting a crossover network and additional speakers. Within the enclosure, damping material of predetermined configuration is affixed to the two sidewalls.
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