Non-Linear High Power Box Design Program



Simulation of Voice Coil Temperature and Compression at High Power in closed Box, Reflex, ABR, Band-pass and Inter-Port alignments.

All Non-Linear T/S parameters + Thermal data can be imported directly from FINEMotor. Multiple drivers and Ports/ABR's


For Hi-Fi, PA, Headphones and Micro loudspeakers

Demo Video

Download FINEBox Tutorial (2.1 Mb)

Download FINEBox Features (0.4 Mb)


  • FINEBox Box Design Software for Loudspeaker incl. Micro and PA drivers

  • Simulation of Voice Coil Temperature and Compression at High Power

  • Closed, Reflex, ABR, Bandpass and Interport alignments

  • Reflex/ABR simulation with Unit SPL, Port SPL and Impedance

  • Cone Excursion of driver/ABR and Port Velocity

  • FINEBox imports all FM3 files from FINEMotor 2014 and newer, both regular and rectangular designs

  • Display Sensitivity in two different modes:

    • Max. Theoretical Sensitivity (This is very useful for Micro Speakers)

    • Std. Loudsoft Sensitivity (This is the lower, more conservative Loudsoft SPL)

  • Import Non-Linear Parameters and Thermal Data from FINEMotor:

    • High Power VC Temperature

    • Motor Temperature

    • Power Compression etc.

  • Power Compression is calculated at any power level and time

  • T/S parameters can be entered directly (i.e. from Klippel)

  • Qts and BL can be changed to see the response changes in the box

  • Input values with extra precision for very small numbers when using Micro Speakers

  • Export simulated and spliced responses

  • Adapts to high resolution monitors with Win10 scaling and zoom

  • Simulate using multiple of the same driver

  • Simulate using multiple reflex ports/ABR's

LOUDSOFT - Agern Alle 3 - 2970 Horsholm - Denmark - Phone: (45) 4582 6291 - Fax: (+45) 4576 5708 - E-mail: