According to the same structure and form, the common speakers can be classified as follows:

Closed box: air cushion, ASW

Inverting box: inverted phase, labyrinth, passive radiation, RI and so on.

Trumpet box: front and back load

Control directional speakers: spherical, sound column, multifaceted, etc.

At present, the most commonly used boxes in the market are enclosed boxes and inverting boxes.