* There is no problem with the operation, but it is cheap, so it will be passed on as it is. It has a great effect on the low-frequency enhancement of JBL's active subwoofer and small speakers. As for the appearance, there is a thin line scratch on the top plate. Serial ME0004603489 (Satoshi Yoneshima)
Maintenance information: 2022.1.31 sweep test good
Accessories: No accessories
Main specifications: Crossover frequency adjustable (40 Hz to 160 Hz) Woofer caliber 20 cm W250 × H465 × D360mm 13.6 kg