eXcelon products incorporate the latest technologies and deliver the highest sonic performance. From advanced audio tuning capablities, crossover and equalizer systems, high voltage preouts and two-year warranty, eXcelon represents the very best product available.eXcelon products incorporate the latest technologies and deliver the highest sonic performance. From advanced audio tuning capablities, crossover and equalizer systems, high voltage preouts and two-year warranty, eXcelon represents the very best product available.