バランスド
usa
http://www.knowles.com/
denmark
http://www.sonion.com/
japan
http://www.japanese.molex.com/molex/products/family?key=balanced_armature_audio_receiver
taiwan
http://sytaudio.com/wpcp/
china
http://www.hearonic.com/en/index.aspx
http://www.kinera-china.com/Product/balance_armature_speaker/