JBL 4425 Charge-Coupled Crossover Boards JBL 4300 Series Not a standalone product

Not a standalone product

Parts are sold separately

Set of four high-quality printed circuit boards that allow owners of the legendary JBL 4300 Series 4-way Studio Monitors (or those who are building their own DIY clones) to upgrade their existing passive crossovers to modern standards using polypropylene film capacitors

Detailed PDF documentation is provided with purchase of the boards

The Full Board Set comes with 2 main boards and 2 auxiliary boards

JBL 4425 Charge-Coupled Crossover Boards JBL 4300 Series Not a standalone productSet 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