※Shipping service. Contents = “Let's have a speaker unit first” The origin of audio The appeal of speaker units (Takatsu Osamu)/Pay attention here! Thorough Research on Successive and Famous Speaker Units/Full Range Units/Coaxial (Coaxial) Units/Woofer Units/Driver Unit Edition■List of Major Standards for Successive Speaker Units by Brand Published 2007/6/30. Since the photograph is a sample, the actual item may be broken or there may be markings etc.