AudioControl products use resistor modules for frequency programming (crossover or PFM frequency). Depending on your installation, you may want to change the PFM to a lower value than the factory default of 33 Hz. Or perhaps you are adding a set of active components to your competition system and need to change the Front High Pass crossover of your 6XS to 4000 Hz. Here you will find our full selection of pre-made modules as well as module blanks if you are building your own (be sure to check out our downloads section at the bottom of this page for more information).

https://www.audiocontrol.com/downloads/tech-papers/tech-note-1005.pdf

https://www.audiocontrol.com/downloads/tech-papers/tech-paper-102.pdf