It is a 7,000 kHz board for F-5/F-15/F-15L. Recommended for those who want to extend to 3way (Tetsuji Oikawa)
Maintenance Information: 2021.4.7 Operation confirmed
Accessories: original box
Main specifications: Compatible models F-5/F-15/F-15L crossover 7,000Hz attenuation characteristics -12/-18dB