To ensure sound transparency of our loudspeaker systems, the modelling process enables every individual component as well as the system overall to be under control. Proteus LS is a mathematical software based on several specifications such as loudspeaker system solution, enclosure shape and volume, T&S parameters, driver localisation, and diffraction at box edges, to name a few. The modelling calculates the loudspeaker system in impedance, volume velocity, membrane displacement, and sound pressure anywhere in space, amplitude, phase and group delay. Our proprietary digital filtering calculations and Leonardo® time correction are included in the Proteus LS software.