Since 1947
喇叭

Since 1985
唱臂、唱盤、CD唱盤、擴大機、喇叭、線材、附件

Since 1997
喇叭

Since 2000
喇叭、唱頭、線材

Since 1979
真空管擴大機、唱頭放大器...etc.

Since 1982
擴大機、CD唱盤、耳機放大器、唱頭放大器...etc.

Since 1983
喇叭