We have a very high standard that is ensured by a Quality Management System.
Among many other things, this system ensures that no loudspeaker leaves our factory without having been rigorously tested, both acoustically and visually.
After a thorough inspection, including a complete electro-acoustic test measurement procedure, on most speakers the person who assembled the loudspeaker signs a label on the back of the speaker to prove that the speaker has been tested and approved.