This is a woofer mount adapter that is thought to be used to convert a 38cm unit hole to a 30cm unit. The previous owner attached it to the JBL C38 BARON. The exterior and bolt mounting part of the individual on one side are damaged, and there is a feeling of use due to dullness, abrasions, etc. (Kobayashi Hitoshi)
Accessories: none
Main specifications: mounting screw pitch: outer circumference: 370 mm, inner circumference: 293 mm; caliber: 270 mm; external dimensions: W356 x H365 x D10 mm; approx. 0.4 kg