It's a crossover network. It has exactly the same structure as the company's X8. This network is recommended when using BB4 with T350, etc., or 12TRXB. The overall appearance is dirty and dull. (Yasuhito Koshihama)
Maintenance information: 2020.11.2 Store operation confirmed (sweep, music signal output OK)
Accessories: none
Main specifications: Crossover frequency 3,500Hz 8Ω Allowable input 100W External dimensions W114 × H89 × D92 mm Weight 680g