Yes, people should...
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Acoustic suspension
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The acoustic suspension woofer is a type of loudspeaker that reduces bass distortion caused by non-linear, stiff mechanical suspensions in conventional loudspeakers. It was invented in 1954 by Edgar Villchur and Henry Kloss.
[edit] Description
The acoustic-suspension woofer (sometimes known as “air suspension”) uses the elastic cushion of air within a sealed enclosure to provide the restoring force for the woofer diaphragm.
The entrapped air of the sealed-loudspeaker enclosure, unlike the stiff suspension of conventional speakers, provides a linear spring for the woofer's diaphragm, enabling it to oscillate a greater distance (excursion) in a linear fashion, a requirement for the clean reproduction of deep-bass tones.
Acoustic suspension woofers are very popular because of their low distortion, although they are much less efficient speakers than systems with vented or ported enclosures." -
http://en.wikipedia.org/wiki/Acoustic_suspension
Id like to know where you are reading this theory about "rear phase coloring the front wave of the driver" and making it move ackwardly. Its weird how the vast majority of the car audio world considers sealed superior to vented systems for 'sq', for group delay if nothing else, yet you talk down to people who agree with them as if they simply haven't read up on the issue. So please, provide us some reference material to back up your theory. Thanks.
Actually, sealed systems extend 'lower' due to not having a tuning point they would unload below. Yes, for most music, a 'low tuned' box will have more output in the lowest octaves of the song, but to say it would extend lower is not true. Hopefully now you understand the distinction. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif