（1）RANKO ACOUSTICS（龍格）是一家創立於1992年在美國紐約的一家發燒音響公司，創辦人是一群對音樂與音響深入研究的資深玩家，其公司是專業開發生產各式高傳真音響線材及調諧音頻配件。
Ranko Acoustics was established in 1992 in New York and is dedicated in research and development in wiring and cables for hi-end audio and video applications.

     （2）傳神，由英國籍華人Gavin Chiu 先生於2010年創辦，是一家專業監聽級耳機開發製造商。Tralucent   古羅馬用語，通透之意。它如同空氣一樣無形，讓聲音無障礙的穿梭，傳神至如臨其境。 
Tralucent is a company develops and manufactures hi-end professional in-ear monitor.  The company was established by Gavin Chiu in 2010 who was raised and educated in UK. The company in Latin means “tralucent”.  As the name it is the sound quality is like light passing through but diffusing it.