Essential Audio

Identical speaker to the 10" XLS drivers but without a magnet and the voice coil has been replaced with a weight. You can fine tune this mass by adding weight to the M5 threaded hole enabling excellent control
over the final design. Passive radiators replace the port by adding a mass equivalent to the volume of air in a 10" tube. This eliminates air velocity noises and enables very low tuning F without ridiculously long or narrow port dimensions. Suit small enclosures. Suit home theater/audio.

Manufacturer Datasheet

Identical to the XLS/XXLS drivers, but without a magnet or voice coil. Available in two mass weightings, further weight can be added enabling excellent control over the final design. Eliminate air velocity noises
and achieve a low tuning F without ridiculously long port dimensions. Best matched with 12" XLS driver for a box volume of 40 to 50L (17Hz)

Manufacturer Datasheet

Identical to the XLS/XXLS drivers, but without a magnet or voice coil. Available in two mass weightings, further weight can be added enabling excellent control over the final design. Eliminate air velocity noises
and achieve a low tuning F without ridiculously long port dimensions. Best matched with 12" XLS driver for a box volume of 40 to 50L (17Hz)

Manufacturer Datasheet