Inexpensive because it is a modified product. JBL 2 inch to 1 inch conversion throat A self-made attachment is attached to the 1 inch side. The diameter of the threaded part is 40 mm by actual measurement. The cork sheet is peeling off on one side (Oikawa Tetsuji)
Accessories: none
Main specifications: opening 2 inch side 49 mm/1 inch side 25 mm W120 x H105 mm approx. 0.5 kg