Development of a pair of loudspeaker enclosures.

This paper presents the design process for a stereophonic loudspeaker system. The enclosures provide a base that is inert to vibration and an effective medium for the uniform formation of acoustic waves. Each enclosure is divided into two parts: the base for the high‐frequency transducer (tweeter) and the enclosure for the low‐frequency one (woofer). The former consists on a solid marble sphere with a copper heat radiator for the tweeter. This one lies on a rail that allows it to move forward and backward to be synchronized in time and phase. The second enclosure incorporates a rigid and massive quarter wavelength type MDF structure that controls the impedance of the woofer by means of a tube and reduces the amplitude of the sound from the back of the woofer diaphragm while favoring the omnidirectional characteristic and controlling diffraction with the baffle. Simulations in Mathcad from King’s tables for the woofer enclosure and others in Matlab for the filter are presented. This paper shows, as a result, a loudspeaker system of high specifications designed with the use of simple low‐cost materials while considering the restrictions of designs of the same type in the industry.