G405 株式会社ナスペック
NASPEC CORPORATION
Audio Analogue (Italy) Berkeley Audio Design (U.S.A.) Cambridge Audio (U.K.)
darTZeel (Switzerland) Joseph Audio (U.S.A.) the J-1 Project (Japan)
Mordaunt-Short (U.K.) North Star Design (Italy) Playback Designs (U.S.A.)
Pro-Ject (Austria) SYNTHESIS (Italy) Wire World (U.S.A.)