Complete Modeling of a Vented Box Loudspeaker in COMSOL Multiphysics®

Feb 2024 | Education Resources

This paper describes the use of COMSOL Multiphysics® during the design of a vented box loudspeaker. Several templates have been created to model the different needs of a complete design. Based upon those templates a real box has been prototyped, measured and confronted to simulation.
The cabinet prototyped may be described as a vented box design, featuring two low frequency drivers mounted in a “V Shape” with a horn loaded compression driver. Several uses of
COMSOL Multiphysics® have been considered in this study.


  • Optimization of the directivity of the V shape design with different configurations in 3D.
  • Optimization of the tuning and shapes of the vent.
  • Optimization of the horns polar pattern and radiating impedance.
  • Calculation of the acoustic modes within the box.
  • Calculation of the structural modes of the box itself.

Most of the models have been confronted to real measurements of a prototype made with a fast prototyping machine.