Thorough maintenance was carried out from the exterior to the interior, such as exchanging terminals. In addition to the sound quality, we are also concerned about the appearance, from the feel of the knobs, the texture of the wood grain, to the frame and screws. It is a monitor speaker that Japan is proud of, and was also used by Swedish national broadcasting and Finnish national broadcasting. It's been half a century since it went on sale, but the brillium diaphragm unit and precise cabinet, which have become rare in modern times, far from being comparable to other current speakers, stand out even more (Oikawa Tetsuji)
Maintenance information: 2026.4.27 Maintained (exterior repair/polishing/full coating, unit frame painting, woofer cone paper coating, network maintenance: frequency characteristic check/ATT cleaning/terminal replacement, unit detachment)
Accessories: none
Main specifications: 3 way, 3 speakers, sealed system, bookshelf type, 30 cm cone type for low range/8.8 cm dome type for medium range/3.0 cm dome type playback frequency band for high frequencies 40 Hz to 20,000 Hz crossover frequency 500 Hz/6,000 Hz impedance 8 ohms output sound pressure level 90 dB dimensions W375 x H675 x D326 mm weight 31 kg/bottle