What are the various types of loudspeaker & sub-woofer (bass-box) enclosures?
A. To achieve full low-frequency extension, some sort of loudspeaker box/enclosure is needed. Since the box affects mostly the bass frequencies and bass-box is a more all-inclusive label than sub-woofer, we will use the term bass-box here. There are several types of bass-boxes; they are well documented in several loudspeaker books (from amazon.com & other web sites) and on several loudspeaker web sites including wikipedia.org/wiki/Loudspeaker_enclosure, www.buyingloudspeakers.com and www.diysubwoofers.org. So our comments here will be brief as possable, omitting history, with minimal technical details. Over 90% of the hi-fi speaker/subwoofer box types in mass production are Sealed or Vented boxes. Over 90% of the studio and concert-sound bass/speaker/subwoofer box types in mass production are Vented boxes. The most common types of bass-box systems are briefly covered here (Aperiodic, Isobaric and other rare-esoteric bass-boxes will not be discussed): • Open Baffle: AKA dipole type spea
