TERRA's oval design prevents the loudspeaker walls from vibrating due to interference and acting as additional, uncontrolled loudspeakers, as well as preventing standing waves from being produced within the cabinet that will greatly boost certain frequencies and defeat others.
Due to the complex design of the loudspeaker, it was decided that the best method for its manufacture is casting, using an aluminum alloy as in the aeronautical industry, which has great acoustic possibilities, is easy to finish and is not petroleum-based.
