* There is no problem with the sound output, but it is inexpensive because it is in poor condition. It is a thin wall-mounted speaker equipped with a 16cm full range unit that seems to have come with Trio's ST-4 J. The exterior has deteriorated due to aging, and stains can be seen on the saran net. Serial 521201 521201 (Asane Tomonori)
Maintenance information: 2022.12.6 sound output confirmed
Accessories: none
Main specifications: size 278 x 400 x 105 mm weight 2.9 kg