It's a 4560-style enclosure made from strong, sturdy plywood. Since the inside of the box is narrow, it is suitable for ferrite units, but the front load and interior are also carefully crafted, so you can expect loud bass. Details are unknown, but a saran net with an ALTEC logo plate is also included. Overall, there is a lot of feeling of use such as dullness, abrasions, scratches, missing bottom corners, etc. (Atsushi Takasaki)
Accessories: Saran net
Main specifications: Screw pitch approx. 370 mm, opening part, 350 mm, internal depth 180 mm, size approx. W760 x H910 (1048 including casters) x D603 (623 including back plate) mm (all measured)