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Vol.5 ME150
2014.4.16
Vol.4 Comparison between the ordinary Magnetic type and the Balanced Armature type
2010.10.25
Vol.3 Dynamic Type (Electrodynamic Transducer)
2009.03.18
Vol.2 Balanced Armature Type
2007.05.20
Vol.1 Firstly
2006.11.01