The Active Crossover Designer is an active crossover design tool distributed as spreadsheets for Microsoft Excel (version 2003 or later) and Open Office Calc (version 3.3 or later). The tools are free, and are designed for the serious hobbyist. There is a crossover design example for a 2-way loudspeaker provided as a tutorial, and a comprehensive technical manual is included.
The ACD tools can model up to 4-way loudspeakers and can be extended to larger models (e.g. line arrays) after some customization. Models are assembled from driver and system templates. The user can then import driver response measurements, determine acoustic offsets for precise phase determinations, and then develop crossovers comprised of any type of first and second order linear filters.
Once the crossover has been designed, it can be rapidly implemented using one of the MiniDSP digital crossover products with the advanced biquad programming feature. Analog transfter functions for all filters are also available in the tool if an analog active realization of the filters is desired.
The conceptual approach for these tools has been to create an "open" platform using commonly available spreadsheet tools that many DIY hobbyists are familiar with. Because all of the calculations are done using spreadsheet formulas that are all visible and accessible, the tools are fully extensible. The user can change any and everything, or add on new functionality, plots, and so on. Some examples of useful add-ons for the CORE TOOLS are provided in the EXTENSIONS section.
The tools are distributed as Excel (XLS) files, however, these are 100% compatible with Open Office Calc.
Active Crossover Designer (ACD) Spreadsheets and Documents © Copyright Charlie Laub, 2012
As mentioned above, the CORE TOOLS can be augmented with EXTENSIONS that provide additional information and capabilities. As new extensions becomes available, they wil be posted in this section.