Subwoofers upside down? Purpose?

[Allstar3.8T]

The main advantage is to save the space of the subs basket/magnet structure in an undersized enclosure. Cooling is gained, as well as a different look. They work almost identical (Not exact due to enclosure seeing more air space w/ the speakers guts removed from the equation) as long as you wire the sub out of phase.
This is a real old trick also done to mimic "push/pull compound isobarik" enclosures of the late 80s early 90s. This was two subs face to face, one in the box, one out obv... the outside one wired out of phase, and they generally benefit w/ a tighter sound due to the playing ridgity of two layered cone playing as one sub. Tight and clear, but minimal volume gain. Makes it sound like one great sub vs two OK ones... Now that technology allows one sub to pound , its an archaic method to do woofers.

[chmura]

The main advantage is to save the space of the subs basket/magnet structure in an undersized enclosure. Cooling is gained, as well as a different look. They work almost identical (Not exact due to enclosure seeing more air space w/ the speakers guts removed from the equation) as long as you wire the sub out of phase.
This is a real old trick also done to mimic "push/pull compound isobarik" enclosures of the late 80s early 90s. This was two subs face to face, one in the box, one out obv... the outside one wired out of phase, and they generally benefit w/ a tighter sound due to the playing ridgity of two layered cone playing as one sub. Tight and clear, but minimal volume gain. Makes it sound like one great sub vs two OK ones... Now that technology allows one sub to pound , its an archaic method to do woofers.

WOW