Audio Vacuum Tubes (Published March 30, 1999) This book provides an easy-to-understand introduction to audio vacuum tubes, covering their mysterious appeal, brands, manufacturers, how to read data, performance, and more. Price: ¥3,600 + tax Product Condition: * Due to long-term storage, there is some wear and tear, and discoloration due to aging, but it does not affect use. * There are some underlined sections in the text with a marker. While there is no problem with reading, please be aware of this if you are concerned. Thank you for viewing. Thank you.