Bandpass woofer enclosure with multiple acoustic filters
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United States of America Patent
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Issued Date -
Jan 4, 2007
app pub date -
Sep 1, 2006
filing date -
Feb 17, 2000
priority date (Note) -
Abandoned
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Abstract
A bandpass loudspeaker enclosure having three sub chambers, a first subchamber being a Helmholtz-reflex chamber with a passive acoustic radiator operating in parallel with the transducer, and the remaining two chambers utilizing two passive acoustic radiators to achieve three Helmholtz-reflex vent tunings and a multiple of low pass acoustic filters that provide an acoustic bandpass with reduced diaphragm displacement and substantially reduced distortion and pipe resonances above the pass band. A further embodiment provides a reduced lowest frequency vent size for a given low frequency subchamber size and tuning frequency.
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