Frequency board for the Accuphase channel divider F-20 and F-25. It is for the 7000 Hz crossover, which is essential for 3-way configurations. There is a stain on the original box. (YONEJIMA Satoshi)
Maintenance information: 2023.11.4 operation confirmed
Accessories: instruction manual, original box
Key Specifications: Chandeva Board for Crossover 7000Hz