This is the JBL 2405H type horn tweeter JPA JST-20H. It used to be handled by NIKKO, which sold unique amplifiers. I have small wounds and dullness (Sasaki Shota)
Maintenance information: 2022.10.17 sweep test OK
Accessories: none
Main specifications: 8Ω, 30W, 110dB, 1.5K to 20kHz