To make the most out of his home theater sound system [Baccula] built this folded horn enclosure ... His design is called the Tuba HT and it is aimed at a 15″ speaker. [Bill] charges for ...

[EH_Design] did just that ... 3D-printed shells, with the “subwoofer” consisting of a pair of 5″ woofers paired up in a special isobaric enclosure that enables a smaller volume to ...