Cajon instrument

A cajon percussion instrument, comprising:

• an open rectangular box structure formed of four planar structural panels rigidly joined along two edges of each panel at substantially right angles, leaving first and second opposite rectangular edge interfaces formed by edges of the box structure, the box structure providing a seat for a player person;
• a tapa strike plate securely joined to the first rectangular edge interface of the box structure, providing a percussion input for the player person to strike;
• and
• a hollow truncated pyramid structure formed with four panels, having a major base of the rectangular shape and dimension of the second rectangular edge interface, and an open opposite minor base, the major base joined rigidly to the second rectangular edge interface of the box structure;
• wherein sound produced in the box structure by percussion input from the striking plate is conducted through the pyramid structure and emitted from the open minor base of the truncated pyramid structure.