JBL 4425 Charge-Coupled Crossover Boards

Set of two high-quality printed circuit boards that allow owners of the JBL 4425 Studio Monitors (or those who are building their own DIY clones) to upgrade their existing passive crossovers to modern standards using polypropylene film capacitors, air-core inductors, and the charge-coupling technique used by JBL in their ultra-high-end studio monitors such as the K2 S9900 and DD67000.

The boards are designed to be installed into the factory crossover housing, and will snap in to the same press-fit mounting features as the factory crossover PCB, making them an easy solution for upgrading your existing system.  See product photos for an example of a completed crossover unit.

Parts are sold separately. We are happy to be partnering with Solen in Canada to offer a "one stop shop" parts kit for the JBL 4425 Charge-Coupled Crossover Boards, which can be found at Solen's website here.

PDF documentation is provided on the Downloads page, which contains detailed instructions on how to assemble the boards and integrate them into your system.

Also be sure to check out our What You'll Need page for information on tools, supplies, etc. that will come in handy for your upgrade project.